Hello,

I have a pair of KEF C30 speakers from the late 80’s, which I am very pleased with. I am considering adding a PSW-2500 subwoofer. The problem is that my receiver does not have a low level subwoofer output. On KEF's web site (under support FAQ), they say:

“Some early home theatre Receivers/Hi-Fi Amplifiers do not have a low level subwoofer output. The only means of output is from the main left and right speaker channels. The following models of subwoofers feature "High Level" inputs for this purpose, PSW4000 and PSW5000. Simply connect the subwoofer between your amplifier and speaker system using the "High Level" inputs from the amplifier and the "High level" outputs to your speakers, to enjoy extended low frequency sound for music and home theatre.

Note: Other Subwoofer models (PSW1000.2, PSW2500, PSW3500) are supplied with a converter to connect speaker cable.”

Can somebody confirm (or deny) this? I don’t see it mentioned in the downloadable user manual. I have e-mailed KEF twice but have not gotten any reply.

Hello,

I have a pair of KEF C30 speakers from the late 80’s, which I am very pleased with. I am considering adding a PSW-2500 subwoofer. The problem is that my receiver does not have a low level subwoofer output. On KEF's web site (under support FAQ), they say:

“Some early home theatre Receivers/Hi-Fi Amplifiers do not have a low level subwoofer output. The only means of output is from the main left and right speaker channels. The following models of subwoofers feature "High Level" inputs for this purpose, PSW4000 and PSW5000. Simply connect the subwoofer between your amplifier and speaker system using the "High Level" inputs from the amplifier and the "High level" outputs to your speakers, to enjoy extended low frequency sound for music and home theatre.

Note: Other Subwoofer models (PSW1000.2, PSW2500, PSW3500) are supplied with a converter to connect speaker cable.”

Can somebody confirm (or deny) this? I don’t see it mentioned in the downloadable user manual. I have e-mailed KEF twice but have not gotten any reply.I know that there are converters available that would allow you to convert a speaker-level (high) signal to line-level (low), and this would allow you to connect the sub to your speaker outputs. But I do not know how a converter would be able to convert the line-level signal back to a speaker-level signal. Just not possible without amplification.

The PSW2500 does not have any speaker level inputs. It will accept a pre-out signal if your amp has coupled pre-out, main-in jacks. The manual does not reference any converter.

It is a nice sub. The sub has a good amp with a torroidal transformer.