Tweakers' Asylum

Posted by bobwire (A) on February 23, 2013 at 12:19:06

In Reply to: RE: bobwire and the Teac DAC posted by barryb on February 22, 2013 at 14:28:33

No, the muse amps are already in there as the first amps out of the DAC chips, then come the 5532's. I replaced the Muse amps with the LM4562's. Which brings me to the next change. After listening for a while I could tell that the power supply was not getting it on with the new op-amps. I replaced the 2200uf/16's that I had put in at C210, 211, 310, 311. These I made 4700uf/16V. They are bigger and I had to shoe horn them in but it got done. Right off as soon as I put it back into the system it was better, more depth, smoother top end. Vocals are not at the back of the stage anymore. I can't wait until it's broke in again. Back to the sound of the op-amps and why they needed more uph. I think that these new amps are more demanding of the supply and need those bigger cap values. Looking at the data sheet I could see that the CMRR can drop as the amp is asked to do more(bandwidth and gain). The caps restore the CMRR or at least help. I think that's what is happening anyway. Someone out there may know better and maybe will fill me in. Good Luck, bobwire