mopardave
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Posts posted by mopardave
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9 hours ago, pnort said:
You might also want to read the reviews in Stereophile for the Elekit 8600S and 8900 300B amps.
do you know the date?
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Just now, mopardave said:
Anolog Discover graphs from this 300b.
The dip around 10k seems the be the OPT.
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2 hours ago, mopardave said:
Not the same amp, but i get it. I have the Willsenton 300b. It would be nice to have a high end $7000 amp to compare. This thing sounds very nice across the CornScala. Using GL 300b, Sophia Electric 274b with NOS 6sl7 and 6sn7gt pre's.
Anolog Discover graphs from this 300b.
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2 hours ago, NOSValves said:
This picture even makes me sicker than the description..... total garbage that is bound to cause it to be thrown away within about 10 years...
Not the same amp, but i get it. I have the Willsenton 300b. It would be nice to have a high end $7000 amp to compare. This thing sounds very nice across the CornScala. Using GL 300b, Sophia Electric 274b with NOS 6sl7 and 6sn7gt pre's.
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21 hours ago, 82 Cornwalls said:
Did you mean "doesn't"?
yes, does not take much.
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I had planned on buying one to try, other expenses prevented that from happening. The Spirit V is the amp i wanted. I bought a Willsenton 300b amp to hotrod and still having fun with that. The Primeluna 400 and the spirit v looked to be nice options. Im now looking at Ayons 300b. It does take alot of power to drive Klipch speakers. My CornScala only uses 1/2 watt to drive to 85db levels. Just learned that.
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Thanks for the reply. I could not get myself to spend that kind of money on an amp, so i decided to purchase a 300b Willsenton. Been doing some modding/hotrodding to it with a change in the power supply, changed out some caps for better Mundorf's and now thinking about new OPT, maybe Hashimotos. For a 1500 dollar 300b, it sounds very nice. I really enjoy the tinkering with these tube amps.
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On 5/31/2023 at 12:57 AM, Flevoman said:
Yes, I have horns, the Cornwall 4.
Any tips for the rectifier tubes?
I have been reading up on the Sophia Electrics. Sounds promising and not too expensive.
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1 hour ago, OO1 said:
@rigma , I would really like to hear his opinion on the differences between the GL 300B and the WE 300B
I have not listened to the WE300b, but from the reviews i have read, the WE is really nice in the mid. That seems to be its sweet spot. You may or may not like the top or bottom. There are some out there that do not like them.
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3 minutes ago, mopardave said:
I currently have the 274 Linlai in it. These are the inexpensive ones as well and they sound better than the originals and i have low hours on them at this point. Not sure of the burn in, but i hear 100hrs.
Everything i have read on rectifiers is the 274 is THE tube for rectification.
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7 hours ago, Flevoman said:
Yes, I have horns, the Cornwall 4.
Any tips for the rectifier tubes?
I currently have the 274 Linlai in it. These are the inexpensive ones as well and they sound better than the originals and i have low hours on them at this point. Not sure of the burn in, but i hear 100hrs.
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7 hours ago, Flevoman said:
It is because of this review that I am starting to have doubts.
The reviewer claims to have tried multiple good tubes and found the audible difference to be minimal.
I have no experience with tube rolling, so I don't know what to expect in terms of the noticeable difference a good tube can make.
Additionally, this reviewer did not test the WE300B tube in this amplifier.
Can the WE300B tube actually make a significant difference, or is this amplifier simply not suited for it?
I hope someone here has more experience with this and can share their insights with me.If your speakers have horns, you will hear a difference good or not as good. I think the original 300 tubes suck. GL's are definitely better. The original rectifier tubes suck as well. Every rectifier tube i have tried is better than the original. The original 6SL7 is quite good. I have a tung-sol 6AU7 with gold pins in it now and cant tell much if any difference.
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12 hours ago, henry4841 said:
Kinda expensive comparing SET 300B amps. I have not priced a well made 300B's in a few years but back then they were around $2,500 and since inflation I would expect the price to increase. From my limited understanding the output transformers play a big part in getting quality sound from a SET and especially a 300B. My only experience is with well reviewed Edcors, Hammond and Electron One iron which are middle of the road when it comes to OPT's. The technical side of me thinks OPT's are no more than wire wrapped around an iron core but many put a lot of emphasis on them. I am sure cost cuts were made in the iron on the Willseton but on the two Chinese kit amps iron I have built they looked and sound really good to my old ears even if made in China. Positively not name brand iron but decent for what the kits cost which I am sure applies to the Willsenton as well. The Willsenton wound probably benefit from some Nichicon capacitors throughout as well as some modifications on the design but who knows where the design came from. A SET is so simple in circuits it should not be a problem for a decent technician to understand the schematic it is built from.
A nice custom Cary will set you back $4000. Dennis Hadd is the man.
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20 hours ago, Flevoman said:
Thank you for sharing your experience. I'd be happy to discuss what works or doesn't work regarding updates. I did come across this post before, and it is certainly interesting to follow, although it seems like that person focuses a lot on the amplifier.
However, I'm also interested in hearing about the modifications you are planning to make. Can you perhaps describe what difference you hear with changing the tubes? Have you seen the link I posted earlier? There's someone who worked on the capacitors and claims to have achieved excellent results. Personally, I have ordered two different preamp tubes that, according to another topic, should sound better. I should be receiving them on Friday, hopefully. The TAD 6SN7GT...
Have you been able to compare the performance of the R300 to other SET 300B amplifiers?
No, this is the only 300b amp i have had in my system. My other amp is a EL34 amp with KT77's in it. It has been a great amp as well, does everything well. Low bass, mid bass and highs are very clean and life like. The 300b separates the instruments better and brings the vocals forward. Very nice. The tube changes have added just a touch more of realism. They just seem to clean things up a bit more with every tube charge and it was very good when i started.
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On 4/10/2023 at 9:30 AM, mopardave said:
I just purchased this amp. It is barely used and comes with a full set of upgraded tubes including the GL 300b. I watched and read all reviews and it looks like it might be a decent 300b for the money(1500). I have been told they are made in the same factory as PrimeLuna and Cayin, but im not sure. Either way good reviews and not too expensive introduction into 300b.
Willsenton R300B SE Integrated Amp #2 | Audiokarma Home Audio Stereo Discussion Forums
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On 5/25/2023 at 4:59 PM, Flevoman said:
I managed to get my hands on a 4-month-old R300 tonight. I've connected it to my Cornwall 4 speakers, and I'm currently listening to it. After two hours of listening, my initial impression is that it sounds good, but not exceptional.. no WOW feeling so far. The soundstage is well-defined, and the sound feels slightly more expansive compared to my Decware Zen Triode. However, I do notice some sharper edges in the vocals. The Decware Zen Triode, in my opinion, is slightly more musical and creates a more holographic image that I find very appealing. It's worth mentioning that the R300 still has its original set of tubes.
I have been following a guy over on AudioKarma as he has done a few mods on this amp and tube rolling as well. (Willsenton 300b). The first tube i switched out was the original Willsenton 300b for some Gold Lion 300b. Nice improvement. Not day and night thou, but an improvement for sure. Then the 2 pre amp tubes were switched for some china tubes 6n8p with metal base. Another improvement. Then the 6SL7 for a Tung-sol 6su7 with gold pins, not as good as the original tube yet, but letting it burn it to see. Now i start on the Retifiers. Currently have a 5u4gb jan phillips and it is better than the original tubes. Today i will be trying some Linlai rectifiers. Will see. Gonna do some of these mods on the amp that the gentleman over on AudioKarma has done. His project is still in progress.
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13 hours ago, CCG said:
In 2020, I messed around with a reisong a50 mk III 300b chinese amp. I see no one was buying. At that time the dealer said, its gonna take a few weeks to be delivered for there was a delay in the port unless if I wanna take a new amp that was been reviewed by guttenberg. Of course I'll wait for a new one and got in a few weeks. Anyways I think right after the review, it made a worldwide sale, and excellent reviews with current owners open a threading forum.
Going back a bit, when I first got the 300b amp, my impression was totally different and I notice besides its bottle-necked, it felt so under powered and sounded thin. I'm not expecting anything from a $630 purchase. So I had my friend worked on it and he practically re-designed the entire input section,the rectifier, switching the power supply from 110 to 120v and I wanted to change the output transformer end up with a Hashimoto. I think I spent and extra well over $1,000 for parts and labor. It was followed up with a change of 2- NOS 6sn7 which I have lots for spare and added a Vishay mkp coupling cap. After these surgery, it made a huge difference in the overall performance. The tonal character drastically changed with 7.8 watts of output power and it sounded like a real juicy set amp. Very holographic sound with a stunning mid-range and mid-bass in the lower part of the volume. In a few months I end up mentioning a few of the modifications to the thread, what I did. And they said I wasted alot of money and all they did is just changing the tubes and coupling caps to PIO. Long after 2-years and so many on-line excellent reviews made, They found out that the amp wasn't even putting out 3 watts. Some of them spent over thousands just in tube rolling. Since then, I haven't heard anything from them. Still have the amp today and just listening to it once in a while. Nothing better or best, I found myself listening more to a 14 watt 300b push-pull amp. Its just the type of music I listen to. These PP 300b amps are dynamite in below below 100hz. For me its good to have both.
You should check out the mods Stephany made to a Reisong 50mk over on AudioKarma or the vid she has on youtube. She brought that amp to live with a true 8w.
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2 hours ago, Deang said:
Way at the top, I asked that you send me a PM or email.
33uF is roughly 600Hz, which at least gets you above the Fc of the horn. You can buy them any place that sells capacitors. If you want the same type capacitor, just read the label.
The 2.5mH is the same value the Type B uses, so you know it's occupying some of that same space around 600Hz.
The Universal isn't as "universal" as everyone thinks it is. It was designed to be used with the K-55 and K-400/K-500. It was called "universal" because it could be used in the Klipschorn, La Scala, and Belle Klipsch. The K-400 has an Fc that is almost a full octave below the crossover point (280Hz). It can be tweaked to be used in the Cornwall or Heresy. It wasn't designed to support any and all driver/horn combinations.
Kevin, and some others can get away with it because they are using larger horns that have a lower Fc in combination with something like the BMS or B&C DCM50 that are designed to go low.
ZXPC provides no real useable data on that horn. Without measuring, there is simply no way of knowing what is going on with that network/horn/driver combination.
33uF will probably prevent the diaphragm from hitting the phase plug, but as far frequency response, distortion, etc., - who knows.
Sorry, I over looked that. Will PM
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1 hour ago, Deang said:
I don’t know enough about titanium diaphragms to be able to tell you at what point it becomes unhappy with you. If it was my set up, I would probably change the 47uF capacitors to 33uF and not drive the system to obscene levels.
I can do that. I dont listen at 95+db levels anymore. 70-90 is about where i live and i now have a 300b amp, so compfortable listening is what i do. Correct me if im wrong, but from what i read it looks like its currently crossed at about 400 with the 47uf and the mid driver only goes down to 500, so wouldn't that leave a hole? Where will the 33uf cross at best guess? Where do i find those caps/filters? Thanks Dean.
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3 hours ago, Deang said:
That place sells all kinds of horns. Please send me a link to the horn you are using.
You are probably fine.
11" x 17" ABS 2" Bolt-On Long Throw Horn 90° x 40° For 2" Exit Drivers (zxpc.us)
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Just now, mopardave said:
3" VOICE COIL - HIGH EFFICIENCY, GOOD POWER HANDLING & CLEAN HIGHS!
DE85TN
Item Price: $241.81
SPEAKER MODEL
DE85TN
SPECIFICATIONS
Throat Diameter
2" / 50mm
Impedance
8 ohms
RMS Power Rating
110 Watts
Program Power 220 Watts Frequency Response
500Hz - 18kHz
Recommended Crossover 1.0KHz Sensitivity (1W/1m)
107dB
Voice Coil Diameter
3" / 75mm
Winding Material Aluminum Inductance 0.14mH Diaphragm Material Titanium Flux Density 1.8T MOUNTING INFORMATION
Overall Diameter 6.7" / 170mm Mounting Holes (4)M6 holes on 90°- 4" Dia. Depth 2.5" / 64mm Net Weight 9.9 lbs./ 4.5 kg. Just now, mopardave said:3" VOICE COIL - HIGH EFFICIENCY, GOOD POWER HANDLING & CLEAN HIGHS!
DE85TN
Item Price: $241.81
SPEAKER MODEL
DE85TN
SPECIFICATIONS
Throat Diameter
2" / 50mm
Impedance
8 ohms
RMS Power Rating
110 Watts
Program Power 220 Watts Frequency Response
500Hz - 18kHz
Recommended Crossover 1.0KHz Sensitivity (1W/1m)
107dB
Voice Coil Diameter
3" / 75mm
Winding Material Aluminum Inductance 0.14mH Diaphragm Material Titanium Flux Density 1.8T MOUNTING INFORMATION
Overall Diameter 6.7" / 170mm Mounting Holes (4)M6 holes on 90°- 4" Dia. Depth 2.5" / 64mm Net Weight 9.9 lbs./ 4.5 kg. This is all i can find on driver and horn.
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3" VOICE COIL - HIGH EFFICIENCY, GOOD POWER HANDLING & CLEAN HIGHS!
DE85TN
Item Price: $241.81
SPEAKER MODEL
DE85TN
SPECIFICATIONS
Throat Diameter
2" / 50mm
Impedance
8 ohms
RMS Power Rating
110 Watts
Program Power 220 Watts Frequency Response
500Hz - 18kHz
Recommended Crossover 1.0KHz Sensitivity (1W/1m)
107dB
Voice Coil Diameter
3" / 75mm
Winding Material Aluminum Inductance 0.14mH Diaphragm Material Titanium Flux Density 1.8T MOUNTING INFORMATION
Overall Diameter 6.7" / 170mm Mounting Holes (4)M6 holes on 90°- 4" Dia. Depth 2.5" / 64mm Net Weight 9.9 lbs./ 4.5 kg. -
The B&C Speakers DE85TN-8 2" titanium compression driver is an example of the transducer engineering excellence that has made this Italian company an industry benchmark. The DE85TN-8's evolution is traceable to its ubiquitous predecessors, the DE75 and DE85, found in many famous concert-level touring speaker systems. FEA-optimized ceramic ferrite magnet materials produce the driver's high flux density, and a copper cap on the DE85TN's pole piece reduces inductive losses and extends high frequency response.
Specifications: • Power handling: 110 watts RMS/220 watts program above recommended crossover of 1 kHz/12 dB slope • VCdia: 3" • Impedance: 8 ohms • Frequency response: 500-18,000 Hz • SPL: 107 dB 1W/1m • Dimensions: 6.7" diameter x 2.5" depth • Net weight: 9.9 lb. • Replacement diaphragm available.
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19 minutes ago, Deang said:
The parts are all crooked. ¯\_(ツ)_/¯
What horn are you using?
Did Kevin teach you how to readjust the autoformer?
Send me a PM, or email at dgwescott@gmail.com
Thanks,
Dean
Zxpc horn. I have the taps as they should be, so yes.
Craig at NOSValves
in Lounge
Posted
Sorry to hear about your wife Craig. Just hearing about this from another member as im not on here much anymore. Prayers to you, your wife and family.