I was wondering if anyone has built a 70 with mono volume pots for each channel? I am thinking of putting one in each of the octal sockets in the front of the chassis. Then drilling a small hole in each corner of the top plate for a bias adjustment pin. Route the leads to that pin for bias adjustment and install a pot in the holes where the socket was for level changes.. Does anyone know if thats been done on a 70? I would like to use the amp exclusively for CD playback so i don't need a pre.
Or would an outboard passive pot control be a better solution? Maybe wired with a jack where the sockets are. I could use a DAC with a level control but i would like to try a pair of quality pots that sit on the chassis.. What value of resistance would i need for mono pots?
Also is there a noticeable sound change with a bigger PS transformer? or just keep the stock unit. I use the SDS cap board for rectification.
BTW; this amp is dead quiet; even at pretty high levels. Nice quiet hiss on high volume.
Also I saved all the stock parts from this amp. if anyone needs something let me know. I have no use for them. They are in good shape. Except the trans' I used them. I don't plan on going back; this is a good amp.