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Would these be good to pair with the audio-technica r70x? Just want to make sure I am not over spending for them or under spending with this combo?
I can't speak for under spending, but definitely far from over spending, $150 is extremely cheap for a DAC/amp combo desktop unit, even a small one. The only thing close to that that I know of would be the Schiit magni modi combo(separate units) which still comes out at $50 more. A quick google search did find a head-fi post saying the Schiit Magni 2 would be more than enough of an amp, so I'm sure the O2 in this would be plenty as well as people often seem to pick between the two. I have the Magni 2 uber(basically the same thing as the currently offered magni 3) and it's more than enough for my 250ohm DT770 Pros, most of the time they're set to 25% ish maybe 30% at low gain. Only time I go above that is if something on my PC is overly quiet and not easy enough to hear. I didn't check to see if this offers a high/low gain switch, but I'd imagine it's enough. Reading through the thread in the link below may help as well. Also it's generally said you PC volume should be at max when using a separate unit like this, though I admittedly change the mixer volume(windows 7) if some program is way too loud...would be adjusting the amp's volume too much and be more of a hassle otherwise.
thanks for info.. this is a very very good deal for the price if you go with the magni3 the specs are better but you still need a dac the modi is another $99 but with the t50rp , he4xx and the hd6xx on the way. t50rp are notorious for being hard to drive.. if you have the extra $ go for schitt stack if not you can't beat this deal.......
magni 3 specs
Maximum Power, 16 ohms: 3W RMS per channel
Maximum Power, 32 ohms: 2W RMS per channel
Maximum Power, 50 ohms: 1.3W RMS per channel
Maximum Power, 300 ohms: 430mW RMS per channel
Maximum Power, 600 ohms: 230mW RMS per channel
compared to this drop o2 + sdac amp specs
- Max output (33 ohms): 613 mW
- Max output (150 ohms): 355 mW
- Max output (600 ohms): 88 mW
so the gain switch toggle on just increases/decreases the volume
Basically yes, gives you more ability to use higher ohm/more power hungry and lower ohm/less power hungry headphones, but what you'll basically hear is a boost or decrease in volume. Also if memory serves, you're best off to bring the volume knob back down to zero when switching...at least when switching to high gain. I personally have yet to use the high gain on my Schiit Magni 2 Uber.