I'm considering this amp and am wondering how it compares to the amps in the "Audiophile Series" or the Emotiva amps. The specs for the 4Z-75 don't mention the Power Supply or Damping factor. They also don't say if the SNR is at 1 Watt or Rated Power or somewhere in between. Has anyone tried this amp? I'm currently using my UPA-2 with a speaker selector and think the 4Z-75 would be a neater approach provided the SQ isn't significantly worse with the 4Z-75. Thanks!
I've just ordered one to use to power my pair of folded horn subwoofers. With 150W per channel into 4 ohms, this is about perfect for my application. I downloaded the test results which include the following data at 8 ohms impedance:
S/N at rated power: 87-89 dB S/N at 1 watt A-weighted: 70-71 dB
I didn't see any data on damping factor in the test results or the manual.
The amp uses Type A/B topography and the manual gives no power supply details other than "massive toroidal power supply". If you look at the picture of the internals on the Sherbourn website, the PS looks very large, indeed.
I'm excited to add this to my HT system!
Last Edit: Aug 11, 2013 21:06:28 GMT -5 by cwmcobra
Theater in Progress:
Sherbourn PT-7030, PA 7-350, PA 7-150, PA 4Z-75, C-12
Emotiva CMX-2, CMX-6
Onkyo Integra T-4711
Klipsch La Scala I LCR with Crites AA crossovers & tweeters; Heresy I S&R surrounds with Crites crossover upgrades
Bill Fitzmaurice DIY THT subwoofers (2)
Harmony 900 remote
Front projector, AT screen, processor (RMC-1?) and in-ceiling speakers for new 3D audio formats