Hello Ian


Apologies for the late response.

They were fabricated for a Nap 300 / DR from a Chord Hugo 2 which used its internal pre amp to drive the Naim amp. Though do take note the wiring for each cable is different for left/right channels!

The Naim wiring configuration from their pre amplifiers output circuit board uses the identical circuit pathways as they're din output pathways just mounted slightly down the circuit board more!

Have plenty of customers with Naim power amplifiers and non Naim pre amps.

You are now not limited to using din plugs and sockets and they basic materials and construction, the DR model amplifiers have a much more extended bandwidth than the older models I believe they claim 80Khz which is the four harmonic from red book brick wall frequencies.