Aesthetix IO vs. Manley Steelhead vs. The Groove

Wow, it gets worse. Popped in a pair of Chinese EL-34s, and now the OTHER tube won't get warm at all. But tube in place of the bad one glows properly. Tried switching a third tube into the other tube's place and still no luck - something in the circuit. Very weird.

I bought the unit secondhand from a reputable dealer - going back to him now. :-(

Patrick, call Jim White at (818) 759-5556 (company listed number) and speak to him. He is a great guy to deal with and quite helpful.

Unit is back with Jim - he said "I want to make sure customers are treated like kings" - I'll post again when I get it back.

Unit is back with me - plugged it in today and it sounds fantastic. Listening with headphones right now.

One issue - I'm picking up a radio station, especially audible between tracks on the phones. Any ideas how to deal with this? I'm running at max gain - a variety of tonearms and LO MCs straight into the Io, 121 ohm resistance, 80 db gain.

The arrangement at the back makes it very difficult to separate the power supply umbilicals and the signal cables. Could this be the problem?

I have to say, this is a hairshirt product on many levels, from its size and weight to its looks and ergonomics, to the number of tubes required, etc. but it sounds AMAZING. Blows my old Rogue 99 Magnum phono stage out of the water, and same with the Tom Evans Groove.

Actually.... duh... the radio station is being picked up by the headphone cable, which is acting as an antenna, and is draped over the Io boxes (currently lying on the floor between me and the headphone amp).

Some rearrangement is called for.