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Help? Bi-Amping With A Pair of Roksan KA-1 Amplifiers

Hello. I need some help with trying to multi-amp with my two Roksan Kandy KA-1 integrated amplifiers. I have a pair of B&W DM640 speakers (may upgrade soon) that are bi-amp capable. I am trying to figure out exactly how to drive the upper frequencies with one amp and the lower frequencies with the other amp.

The later models of the Roksan amplifiers have a trim capability which is supposed to help balance the outputs when bi-amping- I think. My amps do not have the trim function. My amps do have what looks like pre-out and pre-in RCA (L+R) plugs that are bridged with a metal jumper bar. The pre-out is called a “Remote Out” but I think this is a pre-out.

When I pull the jumper bars on the amps, the output on the pre-out (remote out) seems to be very low level and I am not sure I can balance the HF and LF outputs to make this work? Of course, I will remove the jumper bars on the speakers as well.

My question is, can I pull the jumpers on the “remote out” and “Pre-amp input” on both amps and then connect one amp to the other and wire the speakers in bi-amp mode?

I contacted Roksan and their answer was too vague for me as they said I can do this “If the amps are wired correctly". Not much help for a newbie...... Any help would be very appreciated.

Than you in advance,

Bryan


voiceofvinyl

Showing 2 responses by oldhvymec

oldhvymec
5,101 posts
 
One amp is doing mids and highs, and one is doing bass duty.

Don’t pull anything leave the jumper bars intact, on the Integrated.

Remove the jumpers on the speakers

Hook the one with no trim to the left and right speaker bass sections.

Hook the one with trim control to the mids and highs, left and right speaker terminals.

Kinda different, but will work as good as you’re gonna get it. Just two volume controls. One for the bass one for the mids and highs, with trim
(balance, treble, and bass (hopefully)), on the mids and highs.

It's pretty straight forward, You might want to use a little heavier speaker cable on the bass (copper is the best) and better quality for the mids and highs, No need to get crazy just smaller, better cable. Be careful with clad wires they can be on the bright side. Silver over copper, that kind of stuff.  pure copper, pure silver, some clads if they are thought out, properly...

And don’t be sorry, I never have been, apologised a time or two but NEVER sorry... :-)

Regards
oldhvymec
5,101 posts
 
You have to listen and see, which sounds better. CLAMP? Your gonna hook it up, LOL The tape loop will get the signal from the Korg, to both amps with one cable by using the "TAPE LOOP". Horizontal bi amping is what you're doing...Not vertical. Different amps work better horizontal.

Regards
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