One of the best online retailers of headphone amps is Headroom, at http://www.headphone.com .
Headphone amps come in all types: SS, tube, cheap, expensive. Common starters include the META47, the aforementioned MG Head (said to be really excellent value for the price, if you like tubes), and the lower end Headroom amps (SS). As with speakers, matching amp to headphone is important, in terms of sound quality and also impedance (not all amps are capable of driving low impedance headphones).
When you are ready to move up to something a little better, consider the EarMax Pro--tube amp, can drive many kinds of phones including most low impedance phones.
Headphone amps come in all types: SS, tube, cheap, expensive. Common starters include the META47, the aforementioned MG Head (said to be really excellent value for the price, if you like tubes), and the lower end Headroom amps (SS). As with speakers, matching amp to headphone is important, in terms of sound quality and also impedance (not all amps are capable of driving low impedance headphones).
When you are ready to move up to something a little better, consider the EarMax Pro--tube amp, can drive many kinds of phones including most low impedance phones.