Klipsch Jubilee and DSP

[charbuggie]

I wanted to share some info on something I am trying and update everyone as it progresses.  I am Jube owner and I have the KPT-1802 owner.  Over the last year or so I have been trying to get the system dialed in.  Unfortunately I am not a technical expert on audio and I have struggled getting things dialed in.  My room is a killer.  You move the speakers or listening position a couple inches and things really change.  So one day I stumbled across a service offered by Mitch Barnett from accurate sound.  He offers a DSP Calibration service:

Not all DSP/DRC software are created equal. In our testing there are significant sound quality differences between DSP software products. Our DSP calibration service only use these state-of-the-art DSP/DRC software packages: Acourate, Audiolense and Focus Fidelity.
Unlike other DSP correction services, we use advanced mathematical analysis of your speakers and room ratio to calculate the optimum FIR correction (eq) filter based on psychoacoustics.

Our filters are designed to work in both the frequency and time domain to restore accurate sound arriving at your ears. Not only direct sound, but sound over time, specifically at low frequencies. The proof is in listening to superior 3D imaging with smooth and clear bass.
Our DSP calibration service is designed to restore accurate sound at your listening position. We offer up to 6 FIR correction filters for comparison and fine tuning the result to your personal preference while achieving accurate sound.

 

So I sent him and email and decided to give it a try.  First of all I had to buy some hardware.  I ended up using a Lynx Hilo as my audio interface and it works great.  I tried RME products first but their ASIO drivers did not work well with the ASIO drivers in Jriver.  I have to use Jriver because I am using the convolution engine in Jriver.  I also ended up buying a Earthworks M23R Mic and a Grace m101 PRE for the Mic.  I am using a pass labs X250 on the bass bins, a pass labs XA25 on the horns and an old Crown Studio reference II on the SUB.  

 

Here is some more info on the 1st set of filters.

The -3 dB point is 15 Hz. You are getting +- 2.5 dB variation across the entire frequency response, well within the +-3 dB response at the studio. While there is some high shelf boost as you can see in the “correction filter on top” I don’t think it is excessive and probably don’t want much more, but that is for your ears to decide. I don’t boost my cd and waveguide combo too much above 10 kHz either as I find it sounds much more natural without the big boost in the 10 to 20 kHz range.
 
I only used 4 dB of max correction in the Correction Procedure Designer. The default is 6 dB and I have used up to 12 dB of max corr with really bad rooms. So 4 dB is enough to totally smooth out the response but not too bad in the headroom department.

 

I am listening now and the Bass response is incredible.  I will try ands answer questions but I am not the technical guy.  I will be working with Mitch to dial in a few things and finally enjoy the setup.  I plan on getting REW setup to loopback through REW and get some real time measurements.  

 

 

[charbuggie]

Here is a Pic of the room.

[MEH Synergy]

Wow that is an INCREDIBLE system you have there, the entire system it sounds like.   I dig your choice of amp on the sub and mains as well, that bass must be insane with that combo. I can see that the room definitely appears that it may be a challenge. Anyhow, hope you get it dialed in to your liking. Thanks for sharing. 

[Chris A]

I've got a few questions, since this is the first time that someone from this forum has used Mitch's service and his recommended hardware/software:

1. Can you tell me where the microphone is for these measurements, i.e., how far from the front baffle?
    
2. If you're taking measurements at the listening position(s)--more than a metre away--can you post the phase response plot and a spectrogram plot (i.e., before FIR filtering)? 
    
3. What order of crossover filters are you using?  Second order, fourth order, etc.
    
4. Are you still using REW to take measurements, or something else?
    
5. JRIver (running on a PC) typically requires a pretty hefty PC (in terms of its computing horsepower) to apply the FIR filters--can you identify what PC you're using?  JRiver also requires that your PC is running all the time and is your digital preamplifier.  How do you handle analog sources, such as a turntable? Do you ever plan to run more than just stereo with a subwoofer, i.e., how would you convert to a 5.1?  How would you expand to 6 channels using JRiver?
    
6. Can you tell me how many FIR taps are being used in each channel (bass bin, K-402/TAD)?
    
7. The Lynx Hilo apparently goes for $2300 (USD), the Earthworks microphone goes for $600, and the microphone preamp goes for ~$800 (i.e., the total microphone cost is $1400).  Audiolense XO costs ~$460.  Is that the product you're using from Audiolense?  Any other add-on software that's required?
    
8. Can you give us a ballpark on the service costs using Mitch's service?

 

Chris

 

 

[charbuggie]

1.       Can you tell me where the microphone is for these measurements, i.e., how far from the front baffle?

The mic is at the listening position as we are applying “room correction”.  15’ 6” away from the baffle on each speaker
 

2. If you're taking measurements at the listening position(s)--more than a metre away--can you post the phase response plot and a spectrogram plot (i.e., before FIR filtering)? 

I am not sure what value these will be as at 15.5ft there will be so many room reflections, so the phase and spectrogram will be a mess.  Maybe I am missing something?
 

3. What order of crossover filters are you using?  Second order, fourth order, etc.

Linear phase FIR filters, 2^nd order. They are steep slope.  Based on my limited listening they really blend in great.  Once I figure out how to loop back to Jriver through the Hilo, I will run some REW sweeps.  I have attached a PIC to give you an idea how my crossovers are setup.  
 

4. Are you still using REW to take measurements, or something else?

Audiolense that sweeps each individual driver and then REW can be used to get the corrected 2 channel response.  From reading the forums many people have validated that Audiolense simulations are within a .25 dB of the real measurements.  I am looking forward to validating that with REW 

5. JRIver (running on a PC) typically requires a pretty hefty PC (in terms of its computing horsepower) to apply the FIR filters--can you identify what PC you're using?  JRiver also requires that your PC is running all the time and is your digital preamplifier.  How do you handle analog sources, such as a turntable? Do you ever plan to run more than just stereo with a subwoofer, i.e., how would you convert to a 5.1?  How would you expand to 6 channels using JRiver?

My computer is a newer I-5 with 16MB of RAM and has no issues.  I spent about $600 on hardware building it a while back.  One of those budget builds but I had case and power supply already.  I know a guy from a forum that is running a stereo triamped systems using JRiver on an i3 2 GHz with 8 gig RAM using only 10 to 30% of the CPU.
 

6. Can you tell me how many FIR taps are being used in each channel (bass bin, K-402/TAD)?  I had to ask Mitch this one and he said 65,536 FIR taps per channel.
    

7. The Lynx Hilo apparently goes for $2300 (USD), the Earthworks microphone goes for $600, and the microphone preamp goes for ~$800 (i.e., the total microphone cost is $1400).  Audiolense XO costs ~$460.  Is that the product you're using from Audiolense?  Any other add-on software that's required? 

I bought some nice hardware to do this and I can assure you that you can do this at about 40% of the cost I spent.  Motu and RME makes some great products that are much cheaper and I sold some stuff laying around and had the funds.  Heck you can use a UMIK-1 MIC and save a ton.
 

8. Can you give us a ballpark on the service costs using Mitch's service?

$500 for up to 6 DSP FIR filters, but it is a process where the art is how to use the science to achieve the result. I am very inexperienced and time is precious for me.   IMO Mitch offers a great service and so far I am very happy.  I do have to dial somethings in because I just received my first filter and I need to listen and figure out what I want.  But let me say this the BASS will hit you in the chest like a train and the low end is so clear now.  I was listening to Phil Collins in the Air tonight and when he the bass drum, damn… 

I still have to optimize settings in Jriver and the Hilo which I will work towards.  All of this is very new to me because I was a plug and play guy all my life…

When I contacted Mitch asking questions, here are two articles he recommended I read before making my decision

Understanding Digital Room Correction For Audiophiles Article By Mitch Barnett Of Accurate Sound (enjoythemusic.com)

What is Accurate Sound? - Bits and Bytes - Audiophile Style

[Travis In Austin]

Buy a sledge hammer, a pry bar and some good quality eye and face protection. RIP out those beautiful book shelves. Move the speakers back into the corners where they belong, along with the 1802. Run Chief Bonehead's reccomended settings. Listen to that for 25 hours.

 

During the 25 hours you are listening sell the stuff on the shelves you don't really need and buy high quality recordings.

 

That will be $5.00. I will give you double your money back if that doesn't sound far superior to what you have now, even with adjustments. (I will trust you).

 

From there make any changes, in the way you feel is most cost/time efficient for your situation.

 

All kidding aside, that's the room from hell for a speaker specifically designed to go in a corner and I admire you for trying to make those work in there. I have heard them in rooms with one good corner and that was manageable. I have also heard them pulled out 5 to 8' from real wall and it's a completely different speaker. They sounded like a PA system with no musicality. 

 

Have you listened to the set up you have (Jubes with 1802) in a good room? If you have, what percentage would you say you were before the room correction consultation? (80% would be my guess, but that's just based on hearing them out from walls with no bass reinforcement like you have). 

 

Thanks for posting this. Looking forward to hearing about your journey. 

 

 

 

 

[Chief bonehead]

4 hours ago, charbuggie said:

1.       Can you tell me where the microphone is for these measurements, i.e., how far from the front baffle?

The mic is at the listening position as we are applying “room correction”.  15’ 6” away from the baffle on each speaker
 

2. If you're taking measurements at the listening position(s)--more than a metre away--can you post the phase response plot and a spectrogram plot (i.e., before FIR filtering)? 

I am not sure what value these will be as at 15.5ft there will be so many room reflections, so the phase and spectrogram will be a mess.  Maybe I am missing something?
 

3. What order of crossover filters are you using?  Second order, fourth order, etc.

Linear phase FIR filters, 2^nd order. They are steep slope.  Based on my limited listening they really blend in great.  Once I figure out how to loop back to Jriver through the Hilo, I will run some REW sweeps.  I have attached a PIC to give you an idea how my crossovers are setup.  
 

4. Are you still using REW to take measurements, or something else?

Audiolense that sweeps each individual driver and then REW can be used to get the corrected 2 channel response.  From reading the forums many people have validated that Audiolense simulations are within a .25 dB of the real measurements.  I am looking forward to validating that with REW 

5. JRIver (running on a PC) typically requires a pretty hefty PC (in terms of its computing horsepower) to apply the FIR filters--can you identify what PC you're using?  JRiver also requires that your PC is running all the time and is your digital preamplifier.  How do you handle analog sources, such as a turntable? Do you ever plan to run more than just stereo with a subwoofer, i.e., how would you convert to a 5.1?  How would you expand to 6 channels using JRiver?

My computer is a newer I-5 with 16MB of RAM and has no issues.  I spent about $600 on hardware building it a while back.  One of those budget builds but I had case and power supply already.  I know a guy from a forum that is running a stereo triamped systems using JRiver on an i3 2 GHz with 8 gig RAM using only 10 to 30% of the CPU.
 

6. Can you tell me how many FIR taps are being used in each channel (bass bin, K-402/TAD)?  I had to ask Mitch this one and he said 65,536 FIR taps per channel.
    

7. The Lynx Hilo apparently goes for $2300 (USD), the Earthworks microphone goes for $600, and the microphone preamp goes for ~$800 (i.e., the total microphone cost is $1400).  Audiolense XO costs ~$460.  Is that the product you're using from Audiolense?  Any other add-on software that's required? 

I bought some nice hardware to do this and I can assure you that you can do this at about 40% of the cost I spent.  Motu and RME makes some great products that are much cheaper and I sold some stuff laying around and had the funds.  Heck you can use a UMIK-1 MIC and save a ton.
 

8. Can you give us a ballpark on the service costs using Mitch's service?

$500 for up to 6 DSP FIR filters, but it is a process where the art is how to use the science to achieve the result. I am very inexperienced and time is precious for me.   IMO Mitch offers a great service and so far I am very happy.  I do have to dial somethings in because I just received my first filter and I need to listen and figure out what I want.  But let me say this the BASS will hit you in the chest like a train and the low end is so clear now.  I was listening to Phil Collins in the Air tonight and when he the bass drum, damn… 

I still have to optimize settings in Jriver and the Hilo which I will work towards.  All of this is very new to me because I was a plug and play guy all my life…

When I contacted Mitch asking questions, here are two articles he recommended I read before making my decision

Understanding Digital Room Correction For Audiophiles Article By Mitch Barnett Of Accurate Sound (enjoythemusic.com)

What is Accurate Sound? - Bits and Bytes - Audiophile Style

I’m impressed you answered Chris’ questions.....you know you really didn’t have to....🙂

[Chris A]

On 8/15/2021 at 10:18 PM, charbuggie said:

I don’t boost my cd and waveguide combo too much above 10 kHz either as I find it sounds much more natural without the big boost in the 10 to 20 kHz range.

Thanks, Rob, for your responses.  I'm glad that you are finally getting the sound quality that you were after, starting about 2 years ago. Did you ever get any further DSP support from Roy?

 

The comment quoted just above about having the Jubs in the corners, I believe, is probably not very useful since the combination of the Jub KPT-KHJ-LF bass bins in parallel with the KPT-1802-LF subwoofer makes the bass response in-room not an issue with the Jubs out of tight corners. 

 

[mikebse2a3 is apparently doing a similar thing, apparently to avoid using absorption panels just at the exit to the horn mouths.  He inserts an air gap instead.  YMMV.]

 

If using TAD TD-4002s, that "big boost" above 10 kHz isn't really an issue.  It isn't really a "big boost" since the raw response of the TADs on K-402s actually rises above 13 kHz, without chattering, so that roll off shown is actually "baked in" via EQ (assuming you're using TADs).  The TADs don't chatter.  I would bet that Mitch probably hasn't heard them--since I believe he's been using JBL 2" compression drivers, and all of them do chatter above 10-13 kHz, so perhaps he's designed in something that actually isn't desirable.  I'd recommend talking to him about putting that response back (unless you're no longer using TADs). 

 

If those compression drivers are Celestion Axi2050s (as the throat of the K-402s appear to be from your small picture you posted above), then I'd say that allowing the axial response above 10 kHz of them to roll off takes away significant amounts of "sparkle".  At least, that was my experience with the Axi2050--which literally comes alive when that top octave is EQed flat to about 18-19 kHz on-axis.  I recommend revisiting that.

 

The effect of flattening the phase of the Jubilees as much as possible (in your case, using pretty significant FIR filters with a lot of delay) will not only make the bass so much better, it will also change the "listenability" of the loudspeaker quite significantly.  See the following thread for a discussion of that phenomenon:

 

6 hours ago, Chief bonehead said:

I’m impressed you answered Chris’ questions.....you know you really didn’t have to....🙂

Not sure of the context of this. On a side note: have you provided direct DSP dial-in support to his particular room/setup that I'm not aware of? 

 

I did spend time over the past two years helping Rob (always free of charge).  I'm glad that he's finally getting to the sound quality that he's been after, albeit at a much higher investment level, unfortunately.  Mitch has always been friendly, polite, and helpful.  I'm glad that the FIR filtering seems to be working out for you, Rob.

 

Chris

[Chris A]

[I don't see an "edit" button (...it apparently disappeared since yesterday's forum Russian DDOS assault...), so I'll have to add another post]:

 

One of the issues that I've got with taking measurements at the listening position is that you're baking in those nearfield reflections in the FIR filters, which is why I asked about microphone location.  I've found that the effects of using Dirac Live (Full) to be problematic in that it doesn't allow the user to take "minimum phase measurements" in-room.  Instead, it forces the user to move the microphone back too far (at the LPs), then doesn't do a very good job in excluding the nearfield reflections, particularly in the 100-300 Hz band with the Jubs (which don't have directivity issues at this band--like almost all other loudspeaker do).  I eventually had to find a way to shut off Dirac entirely so that it didn't try to boost the room nulls and attenuate the 100-200 band--fairly significantly.  Everything sounded very "thin" with Dirac on.  Once I turned it off and went back to REW measurements using the Xilica to correct, the "thinness" issue disappeared.

 

YMMV.

 

Chris

[Chief bonehead]

2 hours ago, Chris A said:

Thanks, Rob, for your responses.  I'm glad that you are finally getting the sound quality that you were after, starting about 2 years ago. Did you ever get any further DSP support from Roy?

 

The comment quoted just above about having the Jubs in the corners, I believe, is probably not very useful since the combination of the Jub KPT-KHJ-LF bass bins in parallel with the KPT-1802-LF subwoofer makes the bass response in-room not an issue with the Jubs out of tight corners. 

 

[mikebse2a3 is apparently doing a similar thing, apparently to avoid using absorption panels just at the exit to the horn mouths.  He inserts an air gap instead.  YMMV.]

 

If using TAD TD-4002s, that "big boost" above 10 kHz isn't really an issue.  It isn't really a "big boost" since the raw response of the TADs on K-402s actually rises above 13 kHz, without chattering, so that roll off shown is actually "baked in" via EQ (assuming you're using TADs).  The TADs don't chatter.  I would bet that Mitch probably hasn't heard them--since I believe he's been using JBL 2" compression drivers, and all of them do chatter above 10-13 kHz, so perhaps he's designed in something that actually isn't desirable.  I'd recommend talking to him about putting that response back (unless you're no longer using TADs). 

 

If those compression drivers are Celestion Axi2050s (as the throat of the K-402s appear to be from your small picture you posted above), then I'd say that allowing the axial response above 10 kHz of them to roll off takes away significant amounts of "sparkle".  At least, that was my experience with the Axi2050--which literally comes alive when that top octave is EQed flat to about 18-19 kHz on-axis.  I recommend revisiting that.

 

The effect of flattening the phase of the Jubilees as much as possible (in your case, using pretty significant FIR filters with a lot of delay) will not only make the bass so much better, it will also change the "listenability" of the loudspeaker quite significantly.  See the following thread for a discussion of that phenomenon:

 

Not sure of the context of this. On a side note: have you provided direct DSP dial-in support to his particular room/setup that I'm not aware of? 

 

I did spend time over the past two years helping Rob (always free of charge).  I'm glad that he's finally getting to the sound quality that he's been after, albeit at a much higher investment level, unfortunately.  Mitch has always been friendly, polite, and helpful.  I'm glad that the FIR filtering seems to be working out for you, Rob.

 

Chris

It was a joke Chris.....

[Chris A]

5 minutes ago, Chief bonehead said:

It was a joke Chris.....

Sorry...I missed it.  Implied humor tends to be a reason for blowups on the forum--so I tend to read literally.

 

I still have a sense of humor......typically at a higher threshold.

 

Chris

[charbuggie]

The room is what it is and from playing around over the last couple years moving things just inches makes a huge difference.  

I wish I had a better room but it is what I have.  To answer some of the questions I had to ask Mitch.  I am not an expert here and all I am trying to do here is share my experience and provide people good information so they can decide for themselves on what is best for them.  

In the past Chris has been very helpful and no one knows these speakers better them him and Mike B.  I wish I had time to learn more and get into the bug guts of the physics but I dont.  I know enough to be dangerous is all I can say.  

 

 

 

The effect of flattening the phase of the Jubilees as much as possible (in your case, using pretty significant FIR filters with a lot of delay) will not only make the bass so much better, it will also change the "listenability" of the loudspeaker quite significantly.  See the following thread for a discussion of that phenomenon:

 

Yes, we are indeed flattening the phase at low frequencies. This is what the excess phase correction does.

 

One of the issues that I've got with taking measurements at the listening position is that you're baking in those nearfield reflections in the FIR filters, which is why I asked about microphone location.  I've found that the effects of using Dirac Live (Full) to be problematic in that it doesn't allow the user to take "minimum phase measurements" in-room.  Instead, it forces the user to move the microphone back too far (at the LPs), then doesn't do a very good job in excluding the nearfield reflections, particularly in the 100-300 Hz band with the Jubs (which don't have directivity issues at this band--like almost all other loudspeaker do)

 

Nope this is the difference between Dirac and Audiolense. Audiolense uses frequency dependent windowing so that we take care of the room modes and room reflections up to 300 Hz or more, and then we are only adjusting for the direct sound after that. So we are not baking in any reflections after that. That’s the key. We are indeed restoring full minimum phase response which is what the article on ‘What is Accurate Sound” all about.

 

 

 

If using TAD TD-4002s, that "big boost" above 10 kHz isn't really an issue.  It isn't really a "big boost" since the raw response of the TADs on K-402s actually rises above 13 kHz, without chattering, so that roll off shown is actually "baked in" via EQ (assuming you're using TADs).  The TADs don't chatter.  I would bet that Mitch probably hasn't heard them--since I believe he's been using JBL 2" compression drivers, and all of them do chatter above 10-13 kHz, so perhaps he's designed in something that actually isn't desirable.  I'd recommend talking to him about putting that response back (unless you're no longer using TADs). 

 

If those compression drivers are Celestion Axi2050s (as the throat of the K-402s appear to be from your small picture you posted above), then I'd say that allowing the axial response above 10 kHz of them to roll off takes away significant amounts of "sparkle".  At least, that was my experience with the Axi2050--which literally comes alive when that top octave is EQed flat to about 18-19 kHz on-axis.  I recommend revisiting that.

 

I am using Radian PB 950 Beryllium drivers on the K402's and I have attached the data sheet that came with one of the drivers.  I am open to any suggestions on these drivers as I finalize the corrections.

[mikebse2a3]

On 8/17/2021 at 1:04 PM, charbuggie said:

The room is what it is and from playing around over the last couple years moving things just inches makes a huge difference.  

I wish I had a better room but it is what I have. 

Rob don’t worry any about your room you have already proved that you can very effectively deal with it a couple of times that I’ve visited with you over the last couple of years and while his room has real challenges (like most everyone of us have) it can still be an excellent listening room and I have been very impressed with two different implementations/integrations of his system that he has worked on.

 

One implementation was Jubilees pulled out into optimum locations Rob had identified(more forward than what you see in the recent picture he posted) and the KPT-1802 located at the back wall behind the listening location. I believe he was using the mini-DSP SHD at that time but I could be wrong so Rob correct me if not) For those that look at the bookshelves and Jubilee pulled out into the room and think it can’t work I can assure you it can and does in his room. Small incremental movements(inches) of the Jubilee can have very significant changes in his room and when they are located at the optimum location his system had clarity, dynamics and impactful bass that would impress anyone IMHO and when the KPT-1802 was added this room exhibited one of the smoothest/even low end responses below 300Hz as I walked around the room that I have experienced.

 

Second implementation I heard was about a month ago and Rob has moved the Jubilees back towards the corners more and relocated the KPT-1802 upfront between them as seen in the picture he posted. This implementation was equally impressive as the previous one I have described. This indicates that to some extent the current DSP is performing well since the Jubilees have been relocated to a less optimum room location and the program has compensated for this with very good results at the listening location in Rob’s room. On this visit I did not walk around the room to experience how smooth/even the low end responses below 300Hz was (and it really doesn’t matter as long as all the listening locations sound as one desires) but I would be surprised if it was as smooth/even around the room as the other implementation due to this method of active room correction/compensation.

 

Rob’s system is already at a point where recording quality will be his greatest concern moving forward IMO.

 

miketn

 

 

[charbuggie]

Mike,

 

You are so correct, small movements of speakers or listening position make a huge difference.  I wish I had endless funds and could build the ideal room for the jubes and the 1802 sub but I am a working stiff and I have to make due with what I have,  I will be honest There is something about digital I do not like but the world of digital allows for corrections I would never be able to do in the analogue world.  

 

Since you were up here Mike, I got rid of the RME interface and went with the Lynx Hilo.  The Hilo is a much better product and so much easier to implement.  Also you hit the nail on the head, Once I got the Hilo working I managed to get the CD Player to work using the Jriver Live in and the quality of a CD sounds so much better.  It is amazing now,  as soon as you play something off my hard drive that has about 2 TB of music, you know real quick if it is descent quality or not.  Also when you were here Mike I had not received anything from Mitch and the Configuration we were listening to was something a great guy, Brad, off the Avnirvana forum had helped me put together.  

 

Mitch Emailed me the other night and said Klipsch Engineered the Jubes and the 1802 sub to work together perfectly.   He said my setup can follow the MIN Phase textbook target response just about perfectly.  He also said out of all the systems he has dialed in my setup is king top to bottom, even the $65K to $100K Wilson speakers can not reproduce as well.  So that Speaks Highly of the Chief Engineer that designed and built these speakers. So I owe MikeTN a big one because he is the one that got me moving to Buy the Jubes and go the route I did.  I do plan to get some REW info on this thread when I get time and work with Mitch on some final tweaks.  I am a very happy camper for the most part.  Only thing I want to do is figure out a way to run Jriver from a tablet at my listening position.  

 

 

[Chris A]

On 8/17/2021 at 4:33 PM, mikebse2a3 said:

Rob’s system is already at a point where recording quality will be his greatest concern moving forward IMO.

I think that I've run into that myself.  😉

 

One of the things that Dirac does is apparently to flatten phase response, even bass phase response, a little.  This of course greatly increases the perception of bass, something that Rob has mentioned here.  In the present case the tradeoff is computing horsepower and added delay if trying to synchronize with a screen, as I do.  I'm sure the bass response with FIR flattening below 100 Hz knocks your socks off. 

 

Once you get the balance of the Jubilee response flattened in terms of both SPL and phase response I recommend playing some higher quality digital recordings of orchestral or acoustic instrumentation only. These are recordings that don't use a mixing board to stack the music together, i.e., a "natural recording" with all musicians playing/being recorded at the same time.  What I've found is that the music will now draw you into the performance like you've not experienced except at a live acoustic concert.  If using live recordings, make sure that no amplified instruments are prevalent so that the original phase relationships of the instruments together are largely preserved.

 

If you also place a little absorption on the floor (out to about 3 feet around the base of the Jubilees) to catch the strongest floor bounce, and some absorption on the side walls just where the K-402s and Jubilee bass bins are closest to the side walls, the center imaging and soundstage image will greatly increase their clarity and phantom center strength.  The tradeoff here is a slightly less "full" sound quality.  You can also repeat this small addition of absorption on the front wall just next to the K-402s/Jub bass bins--just the first two-to-three feet radially (i.e., the first 3-4 milliseconds of early reflections just around the horn mouths).

 

When you get the acoustic treatments right, you can then sit back and listen to something that you've probably never heard before--except by the real thing: musicians playing together in real time, adjusting their performances to blend together.  It can take your breath away with realism.

 

Chris

[Jesal]

Only thing I want to do is figure out a way to run Jriver from a tablet at my listening position.  
 
 

Try Jremote2, works great for me. I can control jriver song selection/volume from my phone or tablet.

I have the same jriver/audiolense/lynx audio/synergy horns setup.



Sent from my SM-N960W using Tapatalk

[charbuggie]

I have read Jremote2 and Gizmo are the two options.  Has anyone tried Gizmo?

[Jesal]

I tried both, works NP.
I'm using Jremote2 as it's current and they do updates on it, updated last month.
Gizmo was last updated 6 years ago?


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[charbuggie]

I was wondering if Running an application like Team viewer would work?

[Marvel]

Is jriver running on a Windows computer or is it another device?

 

If it is a Winndows computer you can do a Remote Desktop Connection to it from just about any device, and it is the same as being on that computer.