Hi
I use two of these G2 amplifiers (one per channel) to drive two home-built ‘bass modules’ each with a single Dayton Audio DC-160-woofer. Long story short I put them (and the bass modules) in to my main system which consists of Tannoy R2 floorstanders, 2 x BK Gemini II sealed 10 inch subwoofers (one per channel), Arcam A28 amplifier, Arcam D33 DAC and Naim CDSi CD player. They really have helped with stage height, punch and music generally coming alive.
However, and it’s a big one, if the Arcam amplifier is switched on, when I switch the Nobsounds on at the wall (both switched off on their own switches on the amps themselves) it clicks the Arcam into protect mode. I did this once with the volume turned up and it sent a big pop through the main speakers + BK subs and I had to turn the Arcam off at the wall to get it out of protect mode. I have tried both Nobsounds individually and they both do it, yet nothing else does this on the same wall socket. The Arcam uses a different socket. Clearly I don’t want to damage the Arcam (which cost much more than the Nobsounds). I assume that the Nobsounds send something up the RCA cable and into the preouts of the Arcam when they are powered on at the wall, despite the fact that they are switched off themselves! I assume this is also happening when the Arcam is off but I just don’t know about it. I am concerned that the amps are not safe, certainly for those units upstream of them!
Is anyone else aware of this issue with this design of subwoofer amplifier? They do not seem to do it in my office system using a different main amp (AVA). Is there anything else I could try/do to stop this happening? I have just got the system pretty much exactly as I wanted it. The alternative is to replace the Nobsounds with something else that has an adjustable LPF such as 2 x BK electronics plate amplifiers or a single Dayton Audio APA 150. Unfortunately, short of cheap Chinese amps, we don’t seem to have the same choice of off-board LPF amplifiers in Europe/UK as is available in the USA - the OSD amplifiers don’t seem to be available for example.
Any advice on this would be greatly appreciated.
Regards
Alex
I use two of these G2 amplifiers (one per channel) to drive two home-built ‘bass modules’ each with a single Dayton Audio DC-160-woofer. Long story short I put them (and the bass modules) in to my main system which consists of Tannoy R2 floorstanders, 2 x BK Gemini II sealed 10 inch subwoofers (one per channel), Arcam A28 amplifier, Arcam D33 DAC and Naim CDSi CD player. They really have helped with stage height, punch and music generally coming alive.
However, and it’s a big one, if the Arcam amplifier is switched on, when I switch the Nobsounds on at the wall (both switched off on their own switches on the amps themselves) it clicks the Arcam into protect mode. I did this once with the volume turned up and it sent a big pop through the main speakers + BK subs and I had to turn the Arcam off at the wall to get it out of protect mode. I have tried both Nobsounds individually and they both do it, yet nothing else does this on the same wall socket. The Arcam uses a different socket. Clearly I don’t want to damage the Arcam (which cost much more than the Nobsounds). I assume that the Nobsounds send something up the RCA cable and into the preouts of the Arcam when they are powered on at the wall, despite the fact that they are switched off themselves! I assume this is also happening when the Arcam is off but I just don’t know about it. I am concerned that the amps are not safe, certainly for those units upstream of them!
Is anyone else aware of this issue with this design of subwoofer amplifier? They do not seem to do it in my office system using a different main amp (AVA). Is there anything else I could try/do to stop this happening? I have just got the system pretty much exactly as I wanted it. The alternative is to replace the Nobsounds with something else that has an adjustable LPF such as 2 x BK electronics plate amplifiers or a single Dayton Audio APA 150. Unfortunately, short of cheap Chinese amps, we don’t seem to have the same choice of off-board LPF amplifiers in Europe/UK as is available in the USA - the OSD amplifiers don’t seem to be available for example.
Any advice on this would be greatly appreciated.
Regards
Alex
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