thegunner100: so the Enigmas didn't work out for you?

Depending on your room it might hit that low. With high SPL bass (talking 90dB+), you're going to hear port tube shuffling. Just the nature of the small cabinet and how it's tuned. The low sensitivity doesn't help. Something like 81dB/W according to the spec sheet (haven't verified). Assuming you're listening at 1m away with 2 speakers, that's about 84dB @ 1W and 94dB @ 10W. But like I said, if you try to push it beyond that you'll hear distortion from the speaker, not the amp likely.

Another concern might be your placement. I have mine quite close to a back wall, so stuffing the port tube is necessary. I still get great bass but it prevents it from being terribly boom (can still be a bit boomy at times).

Here's my own in-room response with 1/6th octave smoothing. This is in my living room with plenty of space to breath, not on my desk.



I have near-field, quasi-anechoic plots that I took if you're interested, but I think they're on my other hard drive.

In terms of amplification I run them off of a Parasound Z-amp. Picked mine up $100 used. Very good amp (not a shitty Class D) for a desktop application.

I like the little Virtue units, tried one on the A5s for whats worth. Probably won't be as crazy value as the OS but the D5s are very nice speakers as well.

For amplification just pick up a used stereo receiver. Or if you want something small go for https://www.parts-express.com/dayton-audio-apa150-150w-power-amplifier--300-812 or http://shop.emotiva.com/collections/amplifiers/products/a100

For anyone else interested in getting a pair of bookshelf speakers, there's a guy selling the Adam F7s for just $500/pair, excluding shipping/paypal. They're normally $900/pair

http://www.head-fi.org/t/713948/adam-audio-f7-pair