Originally Posted by buzz fretwear
Quick question - I'm considering the FS52's as the LR for my new theater setup (if I go this route I'll be getting the matching center channel). I have on Onkyo 7.1 receiver (I don't have the model number at my fingertips at the moment) that's rated 70 watts. I'll be using a BIC F12 sub. As you probably have already concluded, budget is an issue ;-)
Do I need to be overly concerned about the lower efficiency of the Pioneers compared to, say, a set of Polks? My room isn't that large, and I'm hoping that the sub will give my receiver a little more headroom to the Pioneers. Will my receiver have enough power to drive these things sufficiently?
Hi buzz fretwear,
Welcome to AVS!
How far away from the speakers do you plan to be - i.e. often referred to as the Main Listening Position (MLP)? Kurtz9 asked a similar question based on 5' distance from the speakers, his receiver only needs about 37W to reach reference level. This is using the web app to determine peak SPL of 105dB at the MLP here: http://myhometheater.homestead.com/splcalculator.html
For most people reference level is considered very loud and turn down the Main Volume (MV) by -10dB to -20dB.
If you intend to offload the power hungry bass frequencies to a more cable sub, this would give you more available power (i.e. headroom) from the receiver to drive the mid and high frequencies of the speakers and makes a lot of sense. The tricky bit is integration of the crossover frequency between the sub and the mains. Getting it work properly will result in satisfying results in reproducing the full 20Hz to 20kHz spectrum of sound.
So the key in determining power requirements is (a) how far away one is from the speakers'; (b) the speakers' sensitivity; (c) closeness to room boundaries; (d) number of speakers; and (e) how loud one likes to listen at average levels with 20dB headroom that the amp can deliver without going into clipping.
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