Originally Posted by noway1
Down the road, try to get an amp that is stable into 2 ohm (or at least 4 ohm) loads. That'll give you more options with speakers. Some solid state amps actually double their power as impedance is halved. So a 100 wpc amp (spec's into 8 ohm) might put out 200 wpc into 4 ohm speakers.
As mentioned previously, many speakers, even ones rated at 8 ohms, dip down to 2.5 ohms.
If you are an audiophile, then you DO want a receiver/amp capable of driving the 2.5 ohms.
Most receivers, with the exception of one or two top of the line models, just are not built to handle 2.5 ohm loads.
Some brands like Sony (even their ES line) exaggerate their ratings.
Look at all channels driven rating, which gives you a good indication of the power supply quality. Good amps/receivers have only a slight drop off.
Sony 120 w/ch receivers, in all channels mode are only capable of ~35 w/ch.
Another key item to keep in mind with your selection of speakers and amplification, is dynamic peaks, which can easily be 15+ dB above your current listening level.
Remember for every 3 dB increase in output, your amp needs to supply twice the power output.
Thus for your 90 dB speakers, running at 105 dB using 32 watts, if a 15dB dynamic peak comes along, you need 1024 watts to reproduce it without clipping and distortion. A typical receiver/amp can't handle this.
Now on the other hand, if you choose well designed speakers with good efficiency, i.e 99 dB, your power requirement is only 128 watts.
And there are dynamic peaks that exceed 15 dB.
If you have never listened to high efficiency speakers, with good amplification capable of reproducing dynamic peaks, then you may not even know what you are missing.
The key to true audiophile sound reproduction is choosing a combination of speakers and amplification that CAN reproduce these dynamic peaks.
So you have 2 choices:
1 - lower efficiency speakers with 1,000+ watts/ch amplification, or
2 - quality design, high efficiency speakers that can be driven with reasonable amplification
This is something to keep in mind as you go through your selection process