gktamps wrote:I've never been a fan of using resistive loads on speaker connections to alter impedance. A speaker is a more complex reactive load; using resistors can change the frequency response and take power from the output signal. The autotransformers don't function like resistors.
ttocs; try your tone knob for goodness sake. On my preamps with tone controls, only subtle adjustments are needed unless I'm listening to a really poor recording. You may find the same.
Well, it's not a knob unfortunately. The "tone" settings are buried in the Menu.
... and ...
The reason I haven't tried anything for a while now is due to the M-125's not being connected except for a couple tests here and there. There was work going on in the house, rewiring the a/v system to make things neater, so other than some testing some things - other than tube amps - the system really hasn't been fully functional, and the M-125's have been stored on the dining table during this time. Plus, I loaned out my absorbers to a friend because I'm making new ones, yadda, yadda, yadda.
So your friendly scolding is appropriate and well received! I'll be putting the M-125 amps back in action this weekend. And yes, I "do" know to use the Variac to bring up the voltage slowly like I did when I first built the amps.
I've been using the Krell lately, and it's been working better than ever! Krell told me years ago that if channels weren't "active" that they would not negatively affect the working channels, more power to the active channels. That is not correct. I recently pulled the wires internally for two of the channels and kept the first three channels connected. This in and of itself changes the power rating from 150WPC as a 5 channel amp, to 175WPC as a 3 channel amp. The sound is better, smoother, but the big change is a better soundstage which totally gobsmacked me because I never would've thought it would be as good coming from a single amp that's not a dual-mono design. It's not as deep as the tube monos, but it's just as wide, but the imaging is lower which is interesting. A new experience for me.
Since last week I've also been trying out a pair of mono amps from Emotiva which actually work quite well. They are the HC-1 amps that I wanted to try just before I got the M-125's a couple years ago, but they weren't released until late that year and I was totally enamored with the M-125 being an instant success. So now I'm trying them with the Fronts, just to find out, and maybe keep one to power just the Center speaker.