brownaye
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Posts posted by brownaye
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Hello, I'm selling my BA-3 preamp. Class-A, no-feedback preamp circuit designed by Nelson Pass and released at 2011 Burning Amp festival. I built this as balanced with dual-mono super-regulated power supplies.
I built this pre in 2018 for about $1500 (and a bunch of late nights), specifically to drive a pair of diy FirstWatt F4 balanced monoblocks with CLC psu’s I built previously. Killer pairing into horn systems. Clean and quiet with endless headroom.
I don’t use it much since moving to a pc-based active crossover system. I’m asking $1400 plus shipping costs and 3% PP fee/or pay as friend.
The circuit will accept a single-ended source; simply route the incoming audio ground to pin 1 (and signal to pin 2. The preamp will output balanced regardless of the source.
Volume is controlled by a 4-deck, 24-step GoldPoint audio taper attenuator. Resistors are metal film IRC RC55’s: ¼ watt, 0.1% tolerance per Goldpoint’s excellent recommendation.
Gain transistors are all matched at normal operating temperatures by Diyaudiostore.com. Each channel has a toroidal power supply with Salas UltraBiB SSLV1.3 regulators. https://www.diyaudio.com/forums/power-supplies/322411-salas-sslv1-3-ultrabib-shunt-regulator.html#post5427621.
The result is a really nice sounding preamp.
Dead nuts quiet with my La Scalas.
For exhaustive details, specs, variations and discussion please see: https://www.diyaudio.com/forums/pass-labs/201281-burning-amp-ba-3b-balanced.html#post2739404 and https://diyaudiostore.com/collections/pre-amplifier/products/burning-amplifier-gain-stage-for-ba-3.
I'm in Southern NH USA and will happily meet anyone within 100 miles of Manchester. Otherwise, I can ship double-boxed anywhere at the buyer's expense.
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placeholder for pictures of 2nd system
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Hello, for sale are two pairs of real movie theater speakers. They're in great condition, never having been used professionally.Similar to the JBL 4277 but with nicer drivers. These require an active crossover and must be bi-amped.$2000 OR BEST OFFER--excellent condition; 2453h-sl drivers are less than a year old--System includes:Pair JBL 4508 Bass Bins
Two Pair of JBL 2226 15" Woofers
Pair JBL 2384 Horns
Pair JBL 2453H-SL Compression DriversI also have another set of speakers for sale, which have some minor cosmetic issues on the bass bins cabinets and woofer dust caps but function perfectly:***more pictures coming later today$1500 or best offer--system includes:Pair JBL 4508 Bass Bins
Two Pair JBL 2035 15" Woofers--
Pair JBL 2080 Horns
Pair JBL 2446 Compression DriversI prefer to sell all four together $3000 or best reasonable offer.LOCAL PICKUP IN SOUTHERN NEW HAMPSHIREorI CAN DELIVER WITHIN 100 MILES OF MANCHESTER NH FOR A FEEI won't ship these myself but if you want to ship at your cost using your shipper and packaging agent then let me know.
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SOLD
in Garage Sale
PRICE LOWERED $450
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NLFS
in Garage Sale
On 3/2/2020 at 5:30 PM, babadono said:Add says mated to 2446J, so does this include the drivers?
Thanks for catching that! I apologize for being unclear. The drivers are not included and i updated my original post.
Price Lowered! $175 and we split shipping
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NLFS
in Garage Sale
On 3/2/2020 at 4:57 PM, PrestonTom said:I am going suggest that you let folks know a bit about the horns (throat size, dispersion pattern etc). That will let them know if they can be used in their own set ups.
Good luck,
-Tom
Good call, Tom! Attached is the jbl spec sheet and brief highlights below.
90x40 coverage
¹U . S . P at e nt N o . 4 , 3 0 8 , 9 3 2 . F o r e i g n p at e nt s p e n d i n g .
Throw: Short Horizontal
Coverage: Angle Degrees (-6 dB): 100 (+23. -23)
Average Range: 500 Hz 16 kHz:
Vertical Coverage Angle Degrees (-6 dB): 40 (+ 11, -11)
Average Range: 2 kHz 16 kHz
Directivity Factor (Q): 10.7 (+1.3, -2.51
Directivity Index (Di): 10.3 dB (+1.0, -1.4)
Average Range: 1 kHz 16 kHz
Usable Low-Frequency Limit: 400 Hz
Minimum Recommended Crossover Frequency: 500 Hz
Axial Pressure Sensitivity¹: 112 dB SPL, 1 W @ 1 m
Construction: Molded structural foam (nominal 10 mm (0.38 in) wall thickness
Overall Dimensions:
Mouth Height: 279 mm [11 in]
Mouth Width: 445 mm [17.5 in]
Length: 236 mm [9.28 in]
Mounting Dimensions:
Rear Height: 235 mm [9.25 in]
Rear Width: 400 mm [15.75 in]
Baffle Cutout Required: (Front mounting only)
Height: 238 mm [93/8 in]
Width: 403 mm [157/8 in]
Net Weight: 2.2 kg [6 lb]
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NLFS
in Garage Sale
open to offers
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SOLD
in Garage Sale
i'm open to offers
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SOLD
in Garage Sale
If you're going to the New England Vintage Electronics Expo this Sunday March 1st in Nashua NH, I can hand them over in person.
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NLFS
in Garage Sale
Horns only! No drivers included! See my other ad selling a pair of Faital HF200 drivers:
Taken from a pristine pair of JBL 4670s that have only ever been used for home theater. They were mated to a pair of 2446J drivers, not included in this sale.
Horns are super clean with no obvious scratches or other defects.
$200/BO and we split shipping. If you're going to the New England Vintage Electronics Expo this Sunday March 1st in Nashua NH, I can hand them over in person.
*Edited for clarity
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SOLD
in Garage Sale
Purchased new a year ago, these have been driven in a Bi-Amp setup with homebrew Firstwatt F4 balanced monoblocks, 100 Class A watts into 8ohm. These have had an easy life mounted to JBL 2384 horns; never overdriven or abused.They sound fantastic and make a great midrange in a 3 way. I used these on an Eliptrac 400 horn crossed over at 500Hz on a Klipsch La Scala bass bin and a tweeter for >6kHz. Wonderful combo!These are comfortable pulling two-way duty when mated to the right horn, good from ~500hz to 20k with a little EQing.The 2" throat exit is actually a 1.5"->2" removable adapter! This will fit on 1.5" horns and 2" horns!All packed up in their original boxes, will be double boxed and well packed.
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2 hours ago, dtr20 said:
He originally had them listed for $300 last Saturday. He must have got inundated with emails and bumped them up to $1000. I sent him an email Saturday, but never heard back from him.
Wowsa, $300 is insane for these. What was he thinking? lol I wonder if he's selling them on behalf of someone; a recently passed relative type situation where the seller doesn't really know what he has.
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I'm not affiliated with the seller, just saw this on craigslist and wish I had the room for them. Best price I've seen on a nice pair of Belles. I feel like i'm making a terrible mistake by not immediately buying them lol. But my wife would literally kill me if I brought another pair of speakers home.
https://nh.craigslist.org/ele/d/klipsch-bell-speaker-system/6705944619.html
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13 hours ago, codewritinfool said:
Tonight I COMPLETELY finished one of the HF sections!
WOO congrats! Almost there!
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On 7/16/2018 at 7:03 PM, jwc said:
What driver and what is the size of the box? Is this the 36 inch wide build?
Yes please, I'm very interested in this as well. Did you build these or buy them? Do you mind posting pictures?
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On 7/11/2018 at 5:39 PM, PrestonTom said:
I am a bit of a purist so what I do is take the digital out of my source (CD player) and feed directly into a DSP crossover. This means you need a DSP that has a digital input (not all of them do). This avoids the "extra" DAC to ADC conversion. In the old days this was a critical issue, however with 24 bit/96k sampling it is not really necessary - if the gain structure is set up correctly. Some folks have difficulty in understanding this last point. If you think it through, you will notice that this strategy leads to a 4 channel volume control after the DSP/DAC output. I simply use a 4 channel stepped attenuator.
What about the actual quality of the dsp's dac stage? It sounds like you're satisfied with it. I don't want to start an argument over DAC implementations but I'm one of those people who (thinks) can hear a difference between DACs. IME, the DAC is 3rd in order of importance after speakers and amp. As I've upgraded my DAC stage, each improvement was night and day for me.
I understand the dsp offers other benefits (time alignment etc) that will probably outweigh any problems its own dac stage introduces. So it's probably a trade-off like every other aspect of this hobby that would ultimately be an improvement. Then the upgrade path would change from better DAC to better DSP. Thoughts?
I feel like I've got tunnel vision about the dsp/dac thing but I've got young kids running around my house so the turntable has been put away for a couple of years
. My Hex DAC is as close to vinyl sounding as I've heard in an all-digital rig. I love the sound and don't want to take a step backwards in that area if I don't have to.
FYI my current system is:
Mac mini dedicated music server with Jriver-->USB to Metrum Hex DAC-->Hot-rodded DC Coupled B1 buffer with Stereo Coffee optocoupler volume control-->Firstwatt F5 Turbov2-->La Scalas with Eliptrac HF and 400 horns/K-55v mid and DE120 tweeters
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On 7/11/2018 at 3:56 PM, mark1101 said:
Really, I'm in this thread though to say that the ALK ESNs are very worthwhile, easy to work into a system and fine tune, sound fantastic, and are worth the expensive price..........and the wait. That's pretty much it..........and just have Al build them.
I saw someone provided an ALK design to the OP. I'd be careful because there were successive generations (improvements) to some of them. Who knows what you have.
After pricing out parts from Solen, I'm leaning in the direction you suggest. No way to really do it on the cheap. I have other projects around the house that will come waaaay before new crossovers. I'm really enjoying the SuperAA's and the eliptrac 400 with K-55v.
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3 hours ago, PrestonTom said:
By the way, are we to assume this is for a Klipschorn?
-Tom
Hi Tom, These are for La Scalas. Thanks to Al, I've already upgraded the tweeters to DE120s with Eliptrac HF horns; swapped the stock AA to Al's SuperAA network and have a pair of Eliptrac 400 horns in progress. I plan on running 3 way with the stock K-55v for the time being.
I was reading on Al's website that he recommends the ES500 for La Scala and ES400 for Khorns. He advised me that both would work with a 3 way La Scala with stock mid and woofer drivers.
Let me ask you about the sound quality of the dsp's you've used? I have Metrum Hex DAC which I absolutely love. I'm thinking that the extra adc->dac stage added by a dsp would defeat its benefit. Also, are you aware of any DSPs that can be programmed to have extreme slopes? I've only just started to look into active digital crossovers and the only ones I've found in my budget max out at 48 dB/octave and no steeper. Is an extreme slope DSP a thing?
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3 hours ago, Marvel said:
I usd to have some of those he posted saved at home. If I still have what you need, I will let you know.
Bruce
Thank you Bruce! I think I'm all set now. A good samaritan sent me the ES500 design and the I'm hearing from multiple people the ES5800 was never made public.
3 hours ago, mark1101 said:I don't think Al ever released the design for the ES5800. I have purchased a few pairs of those over the years.
I recently purchased a set of ES500 + ES5800 for the Jubilees.
I doubt you could save very much by building yourself. Also, when Al does it they are a work of art. I have been satisfied with the performance as well.
Agreed, Al's work is impeccable. Unfortunately I can't afford impeccable at the moment lol. I was going to build the ES500 with lower quality parts and upgrade them incrementally as I have funds. I haven't put together a BOM yet so I'm not sure if that will save enough money to justify building it myself. On the other hand, not all the choices we make in this hobby are driven by cost; the tinkering is the fun part.
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Hi Mark, I appreciate that i'm late to this party. I asked Al and he respectfully advised that the designs are out there somewhere if I look hard enough. He wasn't averse to me building it, he just didn't want to be involved.
I did find out that the es5800 was never in the public domain so I'll have to buy that one anyway. I can't for the life of me find the es500.
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Hi all, I know this is a long dead post but I was wondering if anyone knew where I could find a schematic for the ES500 and ES5800 networks?
. My Hex DAC is as close to vinyl sounding as I've heard in an all-digital rig. I love the sound and don't want to take a step backwards in that area if I don't have to.
BA-3 Balanced/dual mono Preamp Nelson Pass design
in Garage Sale
Posted