What’s the Right Power Amp Ratio For Bi-Amping?

Well, I received the second NAD 2700 amplifier this week, and wired it up with the other 2700 to vertically bi-amp my speakers.

Love the newfound benefits of not being power-deficit anymore. There seems to be substantially more detail in the midrange, which is handled a little differently by my Energy Reference Connoisseur 30 speakers. They have a three way design even though they have two identical woofers and one tweeter, designating one of the woofers as a midrange driver. 

Now getting back on topic, checking heat output of the two halves of each amplifier, the sides that drive the woofer / midrange is *much* warmer than the sides that drive the tweeters. That unscientific evaluation suggests there is a distinctly greater amount of power dissipated by the low frequency side of the bi-amp split. I haven’t yet figured out how to empirically measure this, but the first stab will be using my infrared thermometer. 

In the meantime, I’m no longer power hungry 😋 

There is not one. Just go for quality, best low end, best treble etc. You like tube high end, but maybe you like SS bass. Forget about power although the more you can afford the better.

Im bi-amping a pair of Tyler Acoustics Halo Extreme with an Parasound A21+ into the low end and an Prima Luna Evo 400 feeding the top. Rocket 88 carbon x speaker wire. The gain on the amps are within 3 db of each other. The sound and imaging space between the instruments is phenomenal. Im using an Cambridge Audio Cxn v2 into a Audio GD r7he mkii dac and Audio Research LS 28se preamp. Im loving it. 

With speakers that have seperate terminals for LF and HF, doesn't that remove the problem with both amps sharing the same load? Or does it not matter because the amp "sends out" the same signal regardless of what it is connected to?

For example, Tannoys have separate terminals, and Tannoy say they are biamp ready. Would they bother if they didn't feel there could an advantage? 

From what I understand the total out put gain needs to beof equal value or very close. If not the under powered will be drowned out.