Originally Posted by shina411
well I already bought book shelf speakers (infinity primus p163), I've been debating between a desktop amp (audioengine n22 that have sub out) and a martantz pm5004 amp, 'Mrkazador' mentioned that stereo amps are for full ranged speakers...so I guess the martantz is just not for me.
I've better spend the rest of my bucks on a sub
rather than a stereo amp...am I right???
Both the amps you mention are "stereo amps".
Even with bookshelf speakers, if you have a 2-channel system without any sort of high-pass filter being applied to the speakers, your speakers would be considered to be running "full-range".
That Audioengine amp doesn't really have a "sub out", per se. It has a variable pre-out, which will pass a full-range signal. There is no low-pass filter, there. If you connect a subwoofer to it, you will still need to use the sub's own variable low-pass filter to adjust it to your speakers' roll-off.
Provided the sub has speaker-level inputs, you don't need a "sub out" to connect a subwoofer. With that Marantz it would be as simple as using the parallel "B" speaker outputs to connect a subwoofer and then you'd adjust the subwoofer's own variable low-pass filter to the speakers' roll-off just as you would with the Audioengine amp.
I would hazard a guess that the Marantz is a much nicer piece of equipment than that Audioengine amp.
Whichever of the two you decide to do, make certain your subwoofer has a variable low-pass filter.