My first thought is, this won't work if you get a Denon receiver - it has no Main Zone preouts to hook the amplifier to. So if you get the Denon, forget about all of this.
I am planning to use a Yamaha P2500S stereo amp for my polk RTiA7 speakers. I will be using a Yamaha AVR-A820 or a Denon AVR-2312. The main usage of this system will be for music (2.1).
Speakers - Polk Audio RTiA7 - 300W
AVR - 105/110 W per channel
The main intent of putting a pre-amp is to be able to capitalize on the capacity of the speakers. i love the way they sound and am assuming they will be a lot better with higher inputs.
Will i achieve what i am want? Your suggestions would be helpful and great appreciated.
The portion in bold is a dangerous assumption, because with higher inputs, you're going to get higher levels of thermal compression that will negatively effect the sound quality. Just because Polk says they can handle 300w doesn't mean it's a good idea to put that much in to them. It could just mean they won't break right away if you played them at SPL's that required 300w.
Assuming your receiver can put out the 105-110w in 2 channel modes it states and also assuming the P2500S will put out it's rated 20Hz-20kHz power for 8 and 4 ohms of 250-310w, the amp will give you a little over 3 dB more output compared to just the receiver.
The room is 24 feet long x 18 feet wide. It opens up into one room adjoining on its length and to an open courtyard along its width.
space will be used regularly to entertain people with loud and good music being a must.
Given the second part of the statement, you have a lot of open space to cover w/loud music. Polk states that the midwoofer to subwoofer crossover is at 125 Hz (quite low), and you mentioned that you are running a 2.1 setup. So, you're likely crossing over around 60 or 80 Hz, I'm guessing. That means the lower half of your RTiA7 is being used minimally, depending on where you set the speaker/subwoofer crossover at.
You're trying to fill a large space with basically half of the RTiA7 (the top half, with some small contribution from the "subwoofers" on the bottom), which is only 89 dB efficient as a whole. Frankly, I think you're using the wrong tool for the job. If you want loud over a more sizeable space, using
a lot more efficient speakers would be a more effective way of going about it. But seeing as you already have the speakers, that might not be an option.
Just temper your expectations if you go ahead with the amp.
