grawk Posted January 17, 2008 Report Share Posted January 17, 2008 No it won't. Now that you mention that, I just set up a tt. With the gain on the phono set at low, the gain for the mpx3/power amp is high, but not too bad. The problem is when I use either the mpx3 headphone out or he 007t/O2, the gain is way too low, especially with the 007t/O2. If I move the phono to med gain, the gain will be too high with my speaker amp and perfect with the headphone amp. This might be a problem. Gratuitous tt pic: beautiful deck. Quote Link to comment Share on other sites More sharing options...
n_maher Posted January 17, 2008 Author Report Share Posted January 17, 2008 Gratuitous tt pic: Fracken sweet dude. Quote Link to comment Share on other sites More sharing options...
tyrion Posted January 17, 2008 Report Share Posted January 17, 2008 Thanks guys. Amazingly I got it set up and sounding pretty good. I'll have to wait for May for jp to dial it in for me. Now I need to save some dough for the ultimate tt upgrade at the end of '08. Stay tuned. Well, I took the power amp out of the picture and moved in the integrated. Eliminated the mpx3 as a pre and using it as an amp only. The gain problem with the tt is a problem where the slight hum wasn't. The phono I'm using is one I am borrowing and I don't have a manual for the various settings. The only one I could figure out was the gain. I have another phono arriving soon for an audition that might permit some more fine tuning . I will give the mpx3 another chance as a preamp then. Quote Link to comment Share on other sites More sharing options...
Dusty Chalk Posted January 17, 2008 Report Share Posted January 17, 2008 The weird thing is that the headphone is pretty damn quiet, certainly quieter than the preamp outputs that I added ...Sounds like impedance might be a factor. Quote Link to comment Share on other sites More sharing options...
n_maher Posted January 17, 2008 Author Report Share Posted January 17, 2008 Sounds like impedance might be a factor. Possible, maybe even probable. Quote Link to comment Share on other sites More sharing options...
JBLoudG20 Posted January 17, 2008 Report Share Posted January 17, 2008 beautiful dick. mmm, dick. Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted January 21, 2008 Report Share Posted January 21, 2008 so, I'm looking inside yet another MPX3, this one has a "XLR" jack wired up in the back. The pin 2 (left when looking at the back of the jack) is wired to the input signal and the ground is taken, not from the remain two pins, but the brass tab that is tied to the jack itself. Symptom is that when using this jack or the other RCA jacks, a bit of the other signals leak into the selected input if multiple inputs are turned on. So, question is, is this wiring scheme for a XLR->RCA converter valid? Is this the source of this problem, or is it related to the switch itself? bump Quote Link to comment Share on other sites More sharing options...
luvdunhill Posted January 21, 2008 Report Share Posted January 21, 2008 my MPX3 had dual inputs. if you had a different signal running into each, there was definite bleed through. made A/Bing sources a bit of a pain. my guess is that it's not wired properly. I guess I was wondering if isolating the inputs from the case (which is used as a ground) and/or removing that funky XLR jack wiring would help at all ... Quote Link to comment Share on other sites More sharing options...
n_maher Posted January 21, 2008 Author Report Share Posted January 21, 2008 I'll be honest, I can't figure out what you're describing. A picture might be worth 1000 words in this case. Quote Link to comment Share on other sites More sharing options...
Pars Posted January 21, 2008 Report Share Posted January 21, 2008 Gratuitous tt pic: That is a beautiful deck... what is it? Quote Link to comment Share on other sites More sharing options...
tyrion Posted January 21, 2008 Report Share Posted January 21, 2008 Thanks. It's an Acoustic Solid Classic Wood with speed controller: Quote Link to comment Share on other sites More sharing options...
Mastergill Posted January 21, 2008 Report Share Posted January 21, 2008 So, question is, is this wiring scheme for a XLR->RCA converter valid? Is this the source of this problem, or is it related to the switch itself? The ground should be wired to pin 1. Sometimes you can see pin 3 shorted to pin 1 like with the Cardas XLR->RCA adapters but it's better to leave pin 3 alone (floating), less chance of hum... Quote Link to comment Share on other sites More sharing options...
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