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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.
Post Subject: Reply to paulPosted by Bill on: 7/25/2018
My main 6 speakers are modified Edgar horns with 105 dB/ watt sensitivity, and the others are overhead emotive speakers with standard 90 dB/ watt sensitivity. There are two JL self powered f12 subs, and 4 self built subs with a sherbourn five channel amp. The only noise from the system is transformer vibration on the five channel amplifier used for the five subwoofers when it is turned on, and fan noise from my Sony 665 projector.The 1500 the subs attached to has a pot on the front that can be adjusted to decrease and it helps a little, but the transformer noise doesn't completely go away and can vary over time so the pot has to be readjusted. As I only use the subs for video the volume of which masks it. I haven't tried out another power amp there.
The sub panel was wired only for one leg of the ac from the main panel about 40 feet away in the basement, thus using only one phase. The ground and neutral wires are separated right back to the main panel. Thus the wire back to the main panel is run as hot, neutral and separate ground.By the way, when setting up each piece of equipment, I test each for minimal voltage from chassis to ground by ac plug reversal. Have found that three pieces of equipment require cheater plugs with reversal of ac input.
I do have one friend who is a dealer of very high end equipment, primarily tube equipment, who also had trouble with a purepower unit and did return it for full refund, no questions asked. Whole love to know why the United do such great things on most systems, but act horribly on others. Also why romy, I and others have nothing but praise for purepower and others seem to be treated so poorly. It’s a riddle. Alberta Richard can give an explanation for. His side.
Bill
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