Originally Posted by Mfusick
It has balanced inputs right? Get a balanced pre/pro. It will avoid issues and hum.
This is only true if the source of the hum is coming from external interference being induced over the audio cable or from the power supply and induced into the front end of the amp. If the source of noise is mechanical (from faulty transformer mounting or loose windings) or from the power supply inducing into the audio Output, then XLR's will have zero affect.
Originally Posted by J_P_A
I'll go with XLR if I can find a processor at a reasonable price. So far I've come up empty, hence the reason I'm seriously considering that 8801......... I get to a point where I get tired of looking
Like I mentioned above, going XLR will not guarantee you hum free operation.
I too was fortunate enough to get one of these shipped to my door for Nine Hundy !!!! But mine had the dreaded hum/buzz. I am running mine off of one of three individual 240VAC/20amp circuits. (other two are for Sanways).
I had troubleshot this issue for weeks. I even went so far as to shut EVERYTHING
OFF in the subpanel EXCEPT for the breaker going to the 7-350. This included the lighting for the HT, so I was using a flashlight for T/S'ing. I UNPLUGGED EVERYTHING from the 7-350 except for the power cord. I then plugged in a single speaker on one of the channels. As soon as I hit the power button --- there was the buzz/hum. I tried a different speaker from a different manufacture on a different channel and no dice, same issue. This proved unequivocally that the source of the issue was with the AMP since there were no input cables even attached.
That is when I contacted and worked with Lonnie Vaughn (VP) at Emotiva. He was going to email me a return shipping label (sucker weights 105lbs) so I could get it back to them, but it was 2 weeks before Christmas and I knew if I sent it in at this time, I probably would not get it back before February due to the holidays and vacations. I told him I would hang on to it and get back in touch when the holidays settle down.
In that time I finally got my LS-9's and LS-C. I assumed due to their very high sensitivity that they would naturally exasperate the noise issue. Much to my surprise, they were actually quieter than the bookshelf speakers I was using to test with. Before the arrival of the LS-9's, the noise was loud enough to be heard at the MLP. Now that the GR Research speakers are in place, the noise is low enough not to be heard unless up close to one of the speakers. I called Lonnie back and let him know that at this point it wasn't worth the hassle to ship it back and I would call it good.
You could always power one up in stand alone config and wire a speaker to it and see if you hear any hum/buzz (mine was more of an odd buzz).
Good luck !!!! And nice grab getting two of these! Major Score!