Biamping with a cd player

Excellent...

Thank you George.

Will let you know, on this thread, how it turns out.

Have been doing well with just one amp driving the Kappa 9's...
Even on the "Extended" mode on the Kappa's, at very loud levels, I can't get the one WOPL PL 700 amp to clip, overheat or trip the protection circuits built into these beasts.
I am running the Phase Linear fans on the amps... that helps to make sure there'll be no issues.

That WOPL upgrade tested output on both amps were over 500w per channel.
Plus, with the WOPL replacement/upgrades the amps do well @  continuous loads into 2ohm and beyond.
Now very stable driving speakers that dip into the crazy low ohm levels.

Also, back in the day Infinity speakers were matched with Phase Linear amps at a lot of the audio demonstrations.
For some reason they worked very well together.

Makes sense on the vertical biamp.
Have only done horizontal.
Will be going vertical...

On that graph you sent it shows the Kappa 9's dropping below 1ohm...
That's pretty nasty.
No wonder they got their nickname.


Skip

George,

And yes the amps are the same.
Actually consecutive serial numbers.

consecutive serial numbers.

That’s good, they "should" be identical gains, let us know how you went.
They have input level controls anyway, so if the mids/highs or the bass seems louder you can trim it back

Just remember the carpenters saying, "measure twice, cut once"
Same goes for wiring up something like this "double check before turning on"

Cheers George

An oscilloscope (even a very modest one) and a test tone CD or LP or function generator set to sine wave output at a few frequencies across the audio spectrum will help you get the same signal levels to your speaker terminals. 

An oscilloscope (even a very modest one) and a test tone CD or LP or function generator set to sine wave output at a few frequencies across the audio spectrum will help you get the same signal levels to your speaker terminals.

"If" the amps are not identical gains, no need to go to that trouble, just a multiple test tones cd, and you can measure at the speaker terminals using a simple digital ac volt meter to get identical volts into both mid/high and bass terminals.

Cheers George