Well, I have been thinking about doing an nCore build next, not exactly $12 chip amps.
Besides, I live in San Francisco. I need a big heavy amp to dampen the earthquakes. 😉
Best,
Erik
For $12 you have nothing to lose to try them. You will be pleasantly surprised at the performance. nCores are what? $400? !
Haha! You would smell urine and worst on most days. San Francisco is a dirty pile of human detritus. Not only are we awash with homeless, and schizophrenics but they are becoming more heavily armed over time.
Best,
Erik
If you want ultra hifi CHIP amp, this is the amp:
Modulus-86: Composite amplifier achieving 0.00018 % THD.
- Ultra-low 0.00018 % THD (35 W, 8 Ω, 1 kHz)
- Ultra-low 0.00035 % THD+N (35 W, 8 Ω, 1 kHz)
- 35 W output power (8 Ω) using a ±28 V power supply
An externally hosted image should be here but it was not working when we last tested it.
or for more power, the parallel version:
An externally hosted image should be here but it was not working when we last tested it.
Parallel-86: High-power composite amplifier achieving 0.00012 % THD.
- Ultra-low 0.00012 % THD (1 W, 8 Ω, 1 kHz).
- Ultra-low 0.00020 % THD (55 W, 8 Ω, 1 kHz).
- Ultra-low 0.00043 % THD+N (55 W, 8 Ω, 1 kHz).
- 60 W output power into 8 Ω.
- 120 W output power into 4 Ω.
For the parallel version, the PCB is $90 unpopulated, parts are $60. If you assemble yourself it's $150. Fully assembled is $300. But is a used Bryston capable of similar performance?
Here is HD at 55 watts:
And here is noise floor:
Here is HD at 55 watts:
An externally hosted image should be here but it was not working when we last tested it.
And here is noise floor:
An externally hosted image should be here but it was not working when we last tested it.
No doubt I would feel better about all of that completely inaudible improvement. But as a big shot Hall and Oates producer friend used to tell me when I argued with him about similar "It's a game of inches" I am sure there is nothing to lose going for the best figures.
I have to say that I'm really happy they are specifying distortion and noise at 1 watt.
I wouldn't mind buying one, but assembling all the chassis components is usually the big hurdle for me. I really don't want to go on a hunt for those + accessories. I wonder if I can use one of the pre-built nCore chasis.
Erik
I wouldn't mind buying one, but assembling all the chassis components is usually the big hurdle for me. I really don't want to go on a hunt for those + accessories. I wonder if I can use one of the pre-built nCore chasis.
Erik
Question?
Considering I am only going to use this 15" vintage K-33-ish Eminence speaker in the SP-3 from no lower than 100hz and to no higher than 800 hz, what would be some alternative drivers I could use for ultimate midbass/midrange clarity? Do I also have the option of cutting a plate and adapting a 12" in this "winged waveguide" as well or would that affect the crossover/directivity issue? Please refer again to the photo, I do intend to seal the cab and keep it since it matches directivity so well with the hf horn.
Considering I am only going to use this 15" vintage K-33-ish Eminence speaker in the SP-3 from no lower than 100hz and to no higher than 800 hz, what would be some alternative drivers I could use for ultimate midbass/midrange clarity? Do I also have the option of cutting a plate and adapting a 12" in this "winged waveguide" as well or would that affect the crossover/directivity issue? Please refer again to the photo, I do intend to seal the cab and keep it since it matches directivity so well with the hf horn.
Pete,
If your SP3 have Eminence speakers rather than the Scorpion SP-15825 drivers they were designed for, they probably don't measure anything like the specs of the original.
Any driver with different TS parameters will also require a crossover change if you want smooth response.
12" with a plate will work, and would allow for a higher crossover point, 1000 to 1200 Hz will still come out around 90 degree dispersion, though the vertical polars will still be about the same as before since center to center distance is the same.
If you want "ultimate midbass/midrange clarity", you should be looking at the midbass sharing the same horn with the HF, not separated by a wavelength at the crossover, where regardless of the driver used, the vertical dispersion will always be hosed 😉.
Art
Thanks Art.
Actually these Eminence speakers were designed for it shipped with it and predated the Scorpion in these early Sp3s. (I even have the paperwork!) I suspect that the guys at Peavey copied the K33 specs because the same Eminence numbered unit (and before those CTS) was apparently used in the Sp1 (essentially a LaScala clone. These were in production slightly before Peavey had the Black Widow and Scorpion in production) I think these drivers were sort of "all around" like the K33 which PWK used in several designs. At any rate Until I get a large Unity or Synergy horn figured out I am stuck with around
Sub/woofer @ (20-30) to (80-100) direct boxes tl606 with 2x dl15w each
Midbass/mid @ (80-100) to (500-800) *this is the 15" woofer in question in the SP-3*
(I thought that even if I went to the B&C 12" with an adapter plate I could leave the crossover around 800hz or so due to the short horn waveguide as I am only asking for 100 to 600 or so?)
Mid horn a is Peavey Ch-2 running 22a (500-800) to (6k-8k) I could put a 500hz Ch-1 here instead of 800 Ch-2
Fostex 1" supertweeter on K-tube diffraction lens cutting right through horn from (6k-8k) to (18k-20k)
This is all very similar to thex over points used in the EV Sentry lll only I am adding the Subwoofers, I do love the Sentry III but I did detect issues @ around 600 hz, their xover point.
Actually these Eminence speakers were designed for it shipped with it and predated the Scorpion in these early Sp3s. (I even have the paperwork!) I suspect that the guys at Peavey copied the K33 specs because the same Eminence numbered unit (and before those CTS) was apparently used in the Sp1 (essentially a LaScala clone. These were in production slightly before Peavey had the Black Widow and Scorpion in production) I think these drivers were sort of "all around" like the K33 which PWK used in several designs. At any rate Until I get a large Unity or Synergy horn figured out I am stuck with around
Sub/woofer @ (20-30) to (80-100) direct boxes tl606 with 2x dl15w each
Midbass/mid @ (80-100) to (500-800) *this is the 15" woofer in question in the SP-3*
(I thought that even if I went to the B&C 12" with an adapter plate I could leave the crossover around 800hz or so due to the short horn waveguide as I am only asking for 100 to 600 or so?)
Mid horn a is Peavey Ch-2 running 22a (500-800) to (6k-8k) I could put a 500hz Ch-1 here instead of 800 Ch-2
Fostex 1" supertweeter on K-tube diffraction lens cutting right through horn from (6k-8k) to (18k-20k)
This is all very similar to thex over points used in the EV Sentry lll only I am adding the Subwoofers, I do love the Sentry III but I did detect issues @ around 600 hz, their xover point.
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How would changing to a 12" woofer instead of 15" going from 100 too 500 affect directivity in this cab??
Just because you're one of the lucky ones with a good synergy 😀
With separate horns (that match), a good crossover (difficult) and the ceiling treated, the results are impressive.
Oh I am certain beyond all doubt that anything but a Synergy is pretty much a waste of time. What I am waiting for is a dead simple way to do the mids exact dimensions for holes, do we need pre made "frenums" or whatever they are. Still too much guesswork, but really it is quite obvious that anything else is a waste of time, silly, second rate, spinning wheels. No question. Anything else is history and if he would license it variations on the theme are all we would see.
Where do I start. Wouldn't this be most effective above 700Hz and can't we do single driver to there anyway. You've brought up the question of the holes which shouldn't be a significant issue but aren't better than no holes, and same with the round to square transition.
Sorry, rushing before the server goes down.
Sorry, rushing before the server goes down.