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Beyerdynamic amp A1

post #1 of 17
Thread Starter 
There is one for sale on eBay Australia. Can anyone shed some light on this product for me. I have asus xonar stx sound card with a pair of DT990 premium 600 ohm. Is this beneficial for me?

So if u can shed any light on the amp for me and like always I will take ur advice and purchase.
post #2 of 17
Quote:
Originally Posted by punx View Post

Is this beneficial for me?

No
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post #3 of 17
Quote:
Originally Posted by punx View Post

There is one for sale on eBay Australia. Can anyone shed some light on this product for me. I have asus xonar stx sound card with a pair of DT990 premium 600 ohm. Is this beneficial for me?

So if u can shed any light on the amp for me and like always I will take ur advice and purchase.
Dont listen to DrGroove, he apparently knows nothing about audio......
The 600 ohms version of the DT990 is on the difficult side to drive. You will need a more powerful amp than the STX can provide. You will get apox 50% of the possible SQ of the dt990 with the STX. You can get 100% sound quality with a dedicated amp. See here at Moon audios review.
Quote:
The last rating is the 600 ohm load. This rating in our opinion requires a more powerful headphone circuit, and a dedicated headphone amp is more ideal. Some Integrated Amplifiers and Home Theater Receivers will divert power from their front left and right amplifier channels to the headphone jack. You will need to check with the manufacturer as to what your device does in this situation. If yours does not, then we recommend a dedicated headphone amp.

The A1 is ok, but i recommend an external amp/dac for those headphones. The best bang for the buck right now is this amp/dac combo.
http://www.amazon.com/Matrix-M-stage-HPA-2-USB-Headphone/dp/B00H4YUANM/ref=sr_1_2?ie=UTF8&qid=1394182649&sr=8-2&keywords=matrix+mstage+hpa-2
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post #4 of 17
Thread Starter 
So I take it the amp is not a dac combo? I would really like to buy the A1 to help this bloke out but I do wanna get what's right for me
post #5 of 17
A1 is just an amp. You can always use an external amp with a sound card as the DAC. ST/STX's D/A is pretty good.

Some people say Beyerdynamic designed the older gen of large cans around the ~120 ohms output impedance "standard" and sure enough, A1 has 100 ohms output impedance (most devices are lower like sub 1 ohm, where with some headphones and especially IEMs, it makes a difference; STX is around 10 ohms). The output impedance will color the sound slightly on those headphones, very minimally because the headphone impedance is very high—we're talking something like 0.25 dB effective bass boost in midbass.

Anyway, A1 is a dedicated headphone amplifier that cost quite a bit more. It must sound better, right? Warning: Spoiler! (Click to show)
Nah, it's cans that make almost all the difference in sound, especially once you're past the incompetent range** of amps and DACs (or there's some big issue with output impedance for a certain set, which isn't happening here), and something like STX is definitely past that range. Okay, maybe incompetent not the right word. Lots of expensive audio gear intentionally colors the sound to make it different. That's lower fidelity but whether you like that is up to you.

However, without an external device, you won't get any audiophile street cred from many users in this subforum and elsewhere. Also, external amps can look pretty.

Also, having a nice volume knob and thing to interface with isn't bad.

Here I'm talking about sound quality and not perceived sound quality. Getting the right perspective and frame of mind helps perceived sound quality more so than the usually minute differences in sound waves produced, so if the gear is helping you psychologically, go for it.

Any particular reason you're looking at this one as opposed to something else? Beyerdynamic name? Even talking relative to other products and not headphone or say ear / aural system performance (headphones are usually an order of magnitude or more worse at certain key things), the amps and DACs from the big headphone companies don't seem to be that popular for whatever reason.
post #6 of 17
Quote:
Originally Posted by Swolern View Post

Dont listen to DrGroove, he apparently knows nothing about audio......

lol, quoting moon audio tells me everything I need to know about you.

OP, that amp is outragously expensive for what it is. As mikeaj said, it's just a high output impedance solid state amp. That DT990 may be 600 ohm, but that doesn't mean it's inefficient. The STX should be totally fine unless you listen at very high volumes. If you want to get a dedicated amp, get something cheaper.
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post #7 of 17
I'd actually never heard of moon-audio before. 6moons is a different story.
post #8 of 17
Thread Starter 
I can get the A1 at a reasonable price. Can u please explain to me. (in lame mans terms) the steps from pc, sound card, dac, amp head phones.

So can I use the sound card a a dac? I know stuff all about amps/ dac. All I know is I got a stx witch has a built in headphone amp but it won't boost the dt990 premiums 600 ohms to 100%
post #9 of 17
Thread Starter 
Is there a dac u can recommend to pair up with the A1?
Please keep in mind I also own a Astro 2013 mixamp. I don't have that hooked up at the moment tho. I use the 6.3mm jack straight from my stx
post #10 of 17
Quote:
Originally Posted by punx View Post

I can get the A1 at a reasonable price. Can u please explain to me. (in lame mans terms) the steps from pc, sound card, dac, amp head phones.

So can I use the sound card a a dac? I know stuff all about amps/ dac. All I know is I got a stx witch has a built in headphone amp but it won't boost the dt990 premiums 600 ohms to 100%

Quote:
Originally Posted by punx View Post

Is there a dac u can recommend to pair up with the A1?
Please keep in mind I also own a Astro 2013 mixamp. I don't have that hooked up at the moment tho. I use the 6.3mm jack straight from my stx

You can use your soundcard as a DAC and buy a dedicated amp for you DT990s. You would just hookup the soundcard to the AMP via RCA cables and plug your headphones into the AMP. For a really good and price attractive solution I would highly recommend the Yulong D100 AMP/DAC combo. Also the STX will be able to "drive" those DT990s. You just won't get the most out of them. Take a look at the below link

http://www.head-fi.org/t/499562/review-yulong-d100-dac-amp-reference-quality-with-a-reasonable-price
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