Wannabubble

Wannabubble

Junior Audioholic
I have a Denon 2807 and I was wondering if I were to bi-amp my RF-82's would it hurt them in any way. They are rated at 150w RMS and my denon puts out (I think) 110w. Are the speakers as a whole rated at 150 or each section at 150 (LF at 150 and HF at 150 for a total of 300)?

Thanks for your help!

Also, im not asking if it would sound any better, just if it would hurt them. It's Christmas break and I have ALOT of free time on my hands. :p
 
TLS Guy

TLS Guy

Seriously, I have no life.
I have a Denon 2807 and I was wondering if I were to bi-amp my RF-82's would it hurt them in any way. They are rated at 150w RMS and my denon puts out (I think) 110w. Are the speakers as a whole rated at 150 or each section at 150 (LF at 150 and HF at 150 for a total of 300)?

Thanks for your help!

Also, im not asking if it would sound any better, just if it would hurt them. It's Christmas break and I have ALOT of free time on my hands. :p
It will not hurt them, but the high pass section will only take a watt or less. The horns are highly efficient and will take practically no power, so you are wasting time and effort.

The power divide is 400 Hz, although, those speakers are two and half way and drop impedance below 400 Hz, so about two thirds of you amp power will be expended below 400 Hz, and the rest above. The tweeter will take 1% of the power if that. It is a total waste of resources to devote a big amp to that task of just powering a tweeter.

The way to do it, is do away with receivers and external power amps. If that speaker contained active electronic crossovers, and an amp to each of the bass mids of 50 to 75 watts, and a 10 watt amp to the tweeter, then there would be real advantage. Bi amping through as passive crossover is not really bi amping in the strictest sense, and is a total bust.
 
Wannabubble

Wannabubble

Junior Audioholic
Thanks TLS! That cleared up some of my questions.

Would you say that it would be worth looking into some small tube amps for my tweeters?
 
TLS Guy

TLS Guy

Seriously, I have no life.
Thanks TLS! That cleared up some of my questions.

Would you say that it would be worth looking into some small tube amps for my tweeters?
No! It is a waste of time biamping through a passive crossover. The advantage of biamping is getting away from the problems of passive crossover and being able to directly connect the amp to the speaker.

If you use different amps, you need to know what you are doing, as there will be phase shifts, especially in a tube amp because of the output transformer.

You would need to check the phase errors of your two intended amps with a dual channel scope. It is not unusual for different amps to be 180 degrees out of phase, that of course would put your divers out of phase at crossover.

Unless you want to design a speaker from the ground up, to use active crossovers designed to the drivers, forget biamping.
 

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