Originally Posted by KX250F View Post
I have been considering getting two POA amplifiers to go along with my AVP, but have some questions I was hoping you guys could help me with.
I am in the process of getting some new speakers (Aerial LR5 & CC5) that are not very sensitive 86 db and everyone who has them says to feed them alot of power. What I was considering doing is getting two POA amplifiers and using four of the 10 channels for each speaker. I would bridge two channels and run to the low end of each speaker and bridge two channels for the highs of each speaker. I would also do this for the center channel which would use up 12 of the 20 channels all together. I would bridge the other eight channels for my four surrounds.
Hear are some of the questions I have come up with myself.
1) I will need to get some XLR cables that have two connectors on the amp end
2) Can the POA be run in this configuration. (I'm not 100%)
3) Will this be hard on the POA to be run in this configuration.
4) The Aerials are a nominal 4 ohm speaker but do dip into the 3 ohm region according to the specs on there website. Will the Denon be able to handle this type of load without stressing itself.
Looking over the specs from the Denon website they are claiming 500 watts when bridged into 4 ohms. This means I would be putting 1000 watts total into each of the front three speakers and 500 watts to each surround.
Below is a paragraph that I copied and pasted from the review at Audioholics. This paragraph comes from the beginning part of the review but I don't take it as part of the review it just says it's a "Amplifier Connection type Definitions".
Bridge Mode: This connection allows you to use two amplifier channels to output opposite phase signals generated from one input signal. When you bridge an amplifier, you effectively double the output voltage with can yield up to 4 times the rated output power assuming the power supply can deliver that much current. This is a good idea for applications that require lots of power to reach high SPL's but its important to note that each amplifier effectively sees ½ the rated impedance of the loudspeaker so if your speaker system is rated nominally at 4-ohms, be sure the amplifier is stable for two ohm loads before bridging it. Never bridge an amplifier that isn't designed to do so!
So if the Aerials are 4 ohms and dip into the 3 ohm range this means the Denon would be seeing 2 ohms to 1.5 ohms. This is why I ask if the Denon can handle it.
I hope I made everything clear as to my thinking on this setup, and I look forward to your input.
ShaharT is doing exactly what you described with his B&W's as described here http://www.avsforum.com/avs-vb/showt...=#post13991948
and shown here http://www.avsforum.com/avs-vb/showt...=#post14151559
I'm happy to confirm that's exactly what I'm doing - and it's sounds super. Feel free to contact me if you need more info.