Thanks dropping a link to the product info. Two clicks away from that are the specs quoted below. It looks like a flux coupled transformer and the frequency range is predictably horrid. They way they specify the ripple, you just know that it's 6dB down from the center at the band edges (and falling fast!). You may as well sell your sub-woofer if you use this. At the high end, 4kHz is not too sweet either. If this is the weak link of an otherwise superior stereo system, I'd focus on cleaning up the DC power into the empeg and making sure that all the power lines (constant, switched, and remote) are hooked up correctly. A friend's initial installation had the constant line disconnected and the remote line *powering* a big, bad amp. Amazingly it worked, although it thumped and cut out as the volume inched up. By the way, thanks to the empeg guys for designing in a self-resetting breaker on the remote line!

Disclaimer:
My background is mostly RF and DSP, although I have worked some >100dB spurious-free data converters back in the 80's (and you think hard drives used to be expensive). Those converters were 5-50kHz and ground loops were always leaking in around -80dBFS. I tried twin-axial and tri-axial interconnects, flux coupled xformers and chokes. Every time I tried to apply hard earned lessons to my next design, I'd find how little I really knew. Jump on in, you audio gurus, back me up or cut me down!


Ground LP Isolator (270-0054) Specifications Faxback Doc. # 9542

ELECTRICAL DATA:

Impedance Ratio:
Z1:Z2................................................1000 Ohms:600 Ohms
Z1:Z2................................................1000 Ohms:600 Ohms
Frequency Response:.............................300 Hz to 4000 Hz +/- 3 dB
DC Resistance:...............................................@25 degrees C
Z1:....................................................200 Ohms +/- 20%
Z2:....................................................150 Ohms +/- 20%
Insulation:.........................500 VDC apply to primary and secondary
more then 100 Meg Ohms Min.

(ALL-01/26/95)



-jim <MkII:080000260 18G blue>