I tried my friends Atmasphere preamp (its there 15,000.00 one) with my VTL 450 monoblocks in balanced mode. I could not use it because it created a lot of hum. I am using a Audio Research Ref 2 mark 2 in balanced mode and it sounds wonderful. I have had several balanced preamps in my system with out hum. I think Atmasphere scheme on the balanced connector is not what most people in the industry uses. Ralph says otherwise, but the proof is in the pudding.
Preamp Experiences with Atma-sphere Amps
I have finally swapped my CATJL2s for Atma-sphere M-60s and with my Merlin VSM-MXEs they are a revelation. Both are world class amplifiers, but I now beleive that IF you speakers are OTL friendly, it is hard to beat OTLs for speed, clarity, transparency, etc. In other words, I love them with the Merlins.
I would like to hear from those that have experimented with preamps that match well with the Atma amps, including the Atma pres versus others, and passive pre experiences if you have tried it. Right now I'm using a Joule LA-150 MKII that is single-ended and sounds fantastic and quiet so I'm not sure that simply running quieter with balanced outs is a goal, but I'm open. I'm single sourced with Accustic Arts transport and DAC with at least 2V output (might be higher)but it does seem the Atmas need some gain to drive them with their highes input sensitivity. Thanks in advance for your collective wisdom and experiences.
I would like to hear from those that have experimented with preamps that match well with the Atma amps, including the Atma pres versus others, and passive pre experiences if you have tried it. Right now I'm using a Joule LA-150 MKII that is single-ended and sounds fantastic and quiet so I'm not sure that simply running quieter with balanced outs is a goal, but I'm open. I'm single sourced with Accustic Arts transport and DAC with at least 2V output (might be higher)but it does seem the Atmas need some gain to drive them with their highes input sensitivity. Thanks in advance for your collective wisdom and experiences.