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Does anyone know if the Oppo HA-2 would be a decent amp/dac for the HD6xx? I use the HA-2 with the Shure SE846 and it works great, although I have yet to own good over the ear headphones.
The Oppo Ha2 was way to weak with my Fostex mk3, it is underpowered and I found that it colored the sound, so, I resold them. Try and grab a Fiio E12 amp their first amp on the go, it has plenty of power putting out 880mW at 32ohms. The E12 A5 , newer version puts out 800 mW. The oppo is a no no.
If you already own the ha2 I wouldn't suggest you sell it at a loss for a more powerful amp the hd650 simply doesn't need it, I was able to get plenty of volume straight out of my galaxy s6 edge plus, not that I listened to them like that just tested it and it worked fine so yes absolutely the ha2 will work great and it's a very clean amp to, hang on to it until you NEED more
Thank you for the reply and based off that I will definilty heed your advice and hold on to it and join the HD6xx bandwagon! Thanks!
I recently purchased the Schiit Fulla 2 as my first dac/amp to test the waters. After seeing some reviews and looking at the specs, the Fulla 2 can power the HD 6xx's with 40mW RMS per channel. I found a website that calculated how much power is needed for the HD6xx's based on it being 300 ohm impedance and 103 dB/mW sensitivity and it said that for very loud listening, only 15mW of power is needed. The range goes from 85 dB to 120 dB. 120 is where it starts to become painfully loud and 115dB is considered very loud and it was needed 15mW. I watched a few reviews of the Fulla 2 as well, which there are very few of, and one guy tested it with the hd650's and said that it gave enough power to drive them for a good listening experience. Around the 60-75% and up volume levels, the Fulla 2 introduces distortion but thats expected for a cheap entry level dac/amp combo.
Edit: Looking into the ha2, it can provide 30mW of power for 300 ohm impedance so it should be able to power it.
I was thinking the Oppo HA-2 or a Dragonquest myself.
Actually, I own a HA-2SE and had it with HD 600 and 650. And no colouring nothing, while giving plenty of "power". FiiO on the other hand (E10k & E12) had issues with higher frequencies and, on a quick measurement, the SNR (worse than Oppo) influenced the sound quality (especially onto the middle ones).
So - opinions vary :). (It's not only on how much "mW" it puts....but also how it affects the sound passing through...)
I didn't have the HA2 SE, I had the HA2 only. My experience was paired with the Fostex mk3 not the HD600-650 as I don't own them. Also, I found the HA2's bass boost was not as clear and accurate as the bass boost on the Fiio E12 amp. I was giving more of a reference point since the Fostex are so inefficient and the 650 being at 300 ohms. Anyway the build on the oppo Ha2 is absolutely gorgeous but it wasn't for due to lack of power.
Got it :). However - ha 2 se (se= second edition) is a slightly improved version of ha 2. So everything I said applies also to ha 2. I didn't have the fostex Mk 3 (I had for a brief time Mk 1). Still - even if the input level might be at 3000 mW, fostex has low impedance (so - no worries about driving it - of course not at a level that can boost your ears :) from your head).
But - on the bass side - you are right - oppo doesn't enhance it so much. It keeps it more natural (even if fostex mk 1 - if I remember correctly - had some issues in this area- it brought a punchy bass but artificial and with lack of the sub bass). So - if you like to have a stronger boom (read bass :)) in your ears, more artificial - oppo is not the choice. Again it depends on everyone 's taste.
Just another input... it's hard to judge a relatively sensitive (for a full sized circumaural) Dynamic driver headphone against a fairly hard to drive Planar Magnetic driver headphone. I've spent over a month with a modded Fostex T50RP mk III headphon, and so far that was THE headphone that required the highest volume setting on amps, so far. The 300 Ω, 103 dB/mW rated HD 650 actually had headroom above my comfortable listening volume when plugged straight into my phone.
Upgrading to better amps, however isn't (always) about trying to develop a greater volume, ideally they simply provide better control over the driver and a cleaner, clearer view of the audio. If you research really high-end systems, audiophiles spend much more on their amps (and DACs, sometimes other components) than they do on the headphones.
For now, I agree with those saying to wait, and try your new headphones with your existing gear. After that, perhaps attend a headphon meet and try out a few systems, to preview your next move (and possibly snag a discount).