That's it...Im not building another thing until the smoke clears. Well, nothing new....except maybe those with boards and parts on the way....or the dozen or so half started projects around here....or...
Russellc
Russellc
As soon as I know the schedule for roll-out, I'll start dropping hints here.
It will be difficult to resist. 😀 😀 😀
It will be difficult to resist. 😀 😀 😀
Of course I'm not one to try to write words abut sound quality, particularly comparisons. I will say that the Korg has a very distinct sound, which most people will very much like. 😀 But that sound is because it's not neutral.
The other objective comparison you should look at is distortion vs output level between the Korg B1 and the Whammy. One of them has a very distinct increase as the voltage swing increases, the other remains quite controlled (in absolute %.)
I believe a while back Papa had a running prototype of the ACA with a transformer input stage. I have been expecting that iteration. Could that be it?
Nope. 🙂
What you are asking about is a power amp, (which if Nelson gives to us would be really cool) but this thread is more about preamps and things that can drive the ACA and act as a volume control, etc...
What you are asking about is a power amp, (which if Nelson gives to us would be really cool) but this thread is more about preamps and things that can drive the ACA and act as a volume control, etc...
This is really good info! Thanks.
I cannot find a - direct - V vs THD for the Whammy, but I get it that the Korg is the one that increases above 1% after 600mV? As I understand, the Whammy remains more in control?
Again, thanks for the objective info.
Really looking forward to this new 'surprise' coming in form of a 'pre' for the ACA.
Best regards,
Rafa.
After fiddling with my newly built Pass balanced zen line stage and two ACAs, I removed the P5 potentiometers on the preamp and went with 221-ohm resistors in their place. This is about midway in the zero to 500-ohm range of the pots, and as I understand it likely gives me in the neighborhood of 15 dB gain or so. I felt the ACAs needed some help so I didn’t have to stick only to very high efficiency speakers, which I think would be the case with a unity buffer or passive preamp. Driving my 89-dB speakers I get good, clean sound levels at 11 to 12 o’clock on the volume pots in a 20x20 room My plan now is build a pair of 95-dB speakers with a powered sub so the ACAs can just cruise at 9 to 10 o’clock or so and still have some overhead for dynamic peaks.
Nice. I’m just finally gathering the final parts for a Millett MOSFET Max pcb I’ve had for about 6 years . This would look nice beside it!
Oh my, that is just the cutest thing. The size and looks are just amazing!
I actually almost bought a Schiit Vali some time ago just to get a grasp as to how tubes sound.
But as a DIY project, this is just Christmas in March! 🙂
Really looking forward to this, albeit I may have to wait a while as my budget has just got a huge set back for electronic gadgets as I had my 2 month-old phone stollen from me yesterday and I have to start saving up for a replacement. 🙁. So, unlike the Whammy kit, I may not get to be an early adopter this time.
Still, so very interested in specs, schematics, who's design is it?
Just lovely! Thanks for the teaser!
Rafa.
I actually almost bought a Schiit Vali some time ago just to get a grasp as to how tubes sound.
But as a DIY project, this is just Christmas in March! 🙂
Really looking forward to this, albeit I may have to wait a while as my budget has just got a huge set back for electronic gadgets as I had my 2 month-old phone stollen from me yesterday and I have to start saving up for a replacement. 🙁. So, unlike the Whammy kit, I may not get to be an early adopter this time.
Still, so very interested in specs, schematics, who's design is it?
Just lovely! Thanks for the teaser!
Rafa.
Just finishing up my ACA build, I now know what my next project is going to be!! Hope this is going to hit the store soon! 🙂
I can’t seem to find a schematic of the SSII on the links above? I have made a variant of this called the Estudiante by Sodacose - and indeed it is a nice hybrid HPA. Very rich in H2 and sweet sounding.
Estudiante Hybrid (7370 + MOSFET)
But the title of the thread is “best preamp for ACA”. I am not quite sure we need to add all this extra H2 into the already H2 rich ACA.
As was already discussed by the OP, he selected the Aksa Lender which is dominant H2 distortion but overall levels are 0.005% THD, not 1-2% THD, which is sort of what you can expect from these Student-centric tube hybrids. IMO, the SSII paired with ACA mught be too much second harmonic H2 distortion sound.
Another option is the new DC coupled variant of the Aksa Lender called the Melbourne and its motherboard, the Yarra.
The YARRA Preamplifier/HPA for Melbourne DB Group Buy
Estudiante Hybrid (7370 + MOSFET)
But the title of the thread is “best preamp for ACA”. I am not quite sure we need to add all this extra H2 into the already H2 rich ACA.
As was already discussed by the OP, he selected the Aksa Lender which is dominant H2 distortion but overall levels are 0.005% THD, not 1-2% THD, which is sort of what you can expect from these Student-centric tube hybrids. IMO, the SSII paired with ACA mught be too much second harmonic H2 distortion sound.
Another option is the new DC coupled variant of the Aksa Lender called the Melbourne and its motherboard, the Yarra.
The YARRA Preamplifier/HPA for Melbourne DB Group Buy
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I seriously doubt it. The SSII produces neg phase H2 which tend to cancel H2 of a regular ACA or breathe some H2 back into a bridged ACA.