Thanks BertKoor. So would this amp be alright with active speakers then?BertKoor wrote:Hmmm, the "Mobile apps & Hardware" is usually for Android & iPhone related stuff. Your query might get better attention in the generic Hardware or Computer Setup section.
Anyway, your cans (Sennheiser HD-650) appear to have a pretty high impedance of 300 Ohm. So they require plenty juice to drive.
See http://www.head-fi.org/a/headphone-impedance
NextDrive has published some specificationsMaybe I got the wrong end of the stick here, but 2 V @ 600 Ohm renders only 6.7 mW power according to my calculator. 49 mW @ 32 Ohm would mean a voltage of about 1.25V. But without knowing the efficiency of your cans, no definite conclusions can be drawn.MAX. Power Output
2Vrms @ 600Ω
49mW @ 32Ω
Also I cannot find any information anywhere what this DAC/AMP should cost.
You also mention speakers. This device is for headphones only. Speakers require much more power, above 10 W for sure. So for (passive) speakers you need something else.
Having headphones an laptop/iPad Air is good enough to get me playing around, but eventually it'd be good to have a bit of wallop with some speakers -- while keeping down the number of components and costs.