Some guys insist MUSES 72320 is better than relay-based vol control, but I highly doubt that. Any tried that? (Let's ignore those CS3310 etc which are not so good, we only talk about that 72320)

Edited November 18, 20169 yr by mtoc

electrolytic capacitor coupled inputs and outputs

yep, definitely high end

Nelson Pass has tried it.

I put a Muses board by Academy Audio into an AMB M-cubed headphone amp I built. Wrote that up at Innerfidelity when it was still in existence. I set up a switch between a passive TKD 1 dB/step attenuator and the Muses attenuator. 

After hours and hours and hours of listening, I'm still not sure if I can tell the difference, the Muses chip is that good. 

These both go into the input opamp through a double pole front panel switch. The Input opamp is either an OPA 604 or 627, I forget what I put in there. 

Hi~ 

I tried the Muse72320 in 2020, that was a kit form Japan famous DIY Store (https://akizukidenshi.com/catalog/default.aspx)！

The kit include a small PCB, Muse72320, and anything you need, except the output buffer OP.

I made some mod for this kit, including~

1. isolated case for the kit only.

2. Golden Reference regulation for the +15, -15, and the +5V PSU.

3. TX2575 for R4 & R5, the output resistors.

4. big Capacitors for C4 & C5 (47uF)

5. the buffer OP can be replaced to determine the sound quality you like.

I tried out these OPs, LM4562, LME49720, OP27

Did these lot of mod get greater sound？

Well, It depends your taste.

From my view, compared to RK50, I found the Muse 72320 still have some artificial taste and color.

However, the Muse 72320 kit got more punch and power, maybe someone will like these taste.

Some pictures to show my work of Muse 72320, enjoy it！