Problem with older REL subs & class D amps

I ordered a digital high level cable last week. I will probably receive it next week. REL UK & Sumiko said you require this cable with class D digital amps. I bought a Rowland Continuum & started getting a click sound in the left speaker once I pushed the mute, phase, or bypass button on the front of the Rowland. The low level cable has always been hooked to a Marantz AVR at the same time.

When I disconnected the low level cable on the REL & disconnected the ground from the high level cable, all was fine. When the high level ground was re-attached, the click returned.

Sumiko said the new cable should rectify the issue. This problem only started when I received the Rowland. It was fine with a BAT VK 300se,which was not class d.

Hey, I'm scared! Does this issue also apply to Wyred 4 Sound amplifiers??

I have had my W4S ST-1000 connected to the High-level input on my REL Storm III for about 2 months now with no apparent issues so far.

Or have I just been lucky and my system is on danger?

Any thoughts?

Thanks!

I was told by the REL/Sumiko rep to just not use the black ground cable on my REL Gibraltor and my Roland 302 amp. When I hooked the black ground up properly to the negative speaker terminal, I got a terrible LOUD hum from the transformer in the Rowland amp, which I quickly turned off. Again after being told to not use the ground at all, everything works great. I get no audible hum from the amp or the sub. However, when I power the sub on and off, it does make a popping noise. Hope I'm not hurting anything and just doing what I was told.

Good luck with customer support REL is a joke.

Ditto what you said. I've got Stentor Sub that I use for an end table because I couldn't get anywhere with Sumiko.