For Sale Q17 stereo amplifier PCBs with parts

[baggerbole]

I hate painting walls...

 

[pinnocchio]

Here it is on the bench and playing on suicide speakers

Do

 

[manniraj]

Hi Do, I think as you are using the Prasi CRC psu and I remember @iTiberius the original designer suggesting to short the R for this amp for stability/oscillation if I remember it right.

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[pinnocchio]

I checked on the scope and no oscillation at all, but this PSU was initially assembled for class A amplifiers so I'll bypass the resistors in this case. Thanks for the info!

Do

 

[baggerbole]

I´m curious about your findings - especially on sound 😉

 

[pinnocchio]

I might open another thread as this is a sales thread but I have not yet listened to it on a good pair of speakers, only my Bose suicide speakers but it does seem to have superb bass control and a very lush midrange. I cannot tell much of the upper register as those Bose speakers are not good in the higher octaves.

Do

 

[pinnocchio]

Well after several weeks working on many projects including the kitchen (which has been completed), I finally found the issue... Well I was supplying the amplifier with too low voltage, I was supplying +/-48Vdc, now I'm supplying +/-58Vdc and everything is working perfectly. DC offset seems to settle around 2-3mV.

So now they're assembled and tested and I've had a good listen and they sound really good.

Modules are still for sale.

Best!
Do

 

[pinnocchio]

Up! 🙂

30$ of this sale will go to DIYA