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hotaudio40 's amps - Page 33

post #481 of 771
^^ well, I am fairly new to head-fi, I never knew that an amp can be too powerful for headphones.
thanks for your offer for returning it(its a pain trying to ship anything internationally from my place) , but I shall be keeping it.
Will try my speakers through it.

would a resistor help and are any cheap ones available ?
post #482 of 771
Yes resistors would help.

You could try a couple of 100 ohm resistors in series with the left and right headphone elements.

IE. add a 100 ohm resistor from the output of the DAC to the left input of the headphones and do the same for the right input of the headphones.

This will help reduce the noise and may eliminate it completely.

Using it through your speakers I think you'll be very impressed.

Here is a link I found right on this site about adding resistors, hiss, and noise reduction:

http://www.head-fi.org/forums/f15/wi...edance-326387/

Check it out!

Maybe I should make resistor headphone adaptors....


Thanks for your understanding.
post #483 of 771
This hissing problem has got me wondering what's the best solution for my needs. I have Audio Technica ATH-M50's. 38 ohm resistance - 99db sensitivity. Would the dac destroyer be plenty for me? or would I still see benefits from going for the supreme? any help greatly appreciated.
post #484 of 771
post #485 of 771
Quote:
Originally Posted by Bones2010 View Post
This hissing problem has got me wondering what's the best solution for my needs. I have Audio Technica ATH-M50's. 38 ohm resistance - 99db sensitivity. Would the dac destroyer be plenty for me? or would I still see benefits from going for the supreme? any help greatly appreciated.
While different phones react differently, here are my experiences...

USB1 + everything = no hissing that I've noticed
USB1 + Raging Moose + RX700 (32 ohm) = hissing, doesn't affect music.
USB1 + RM + HFI2200 (75 ohm) = very, very slight hum (I have to be looking for it at high volumes). Not a problem, music wise.
USB1 + RM + W1000s (40 ohm, via 1/4 to 1/8 adapter) = hissing, but it's a setup I wouldn't use in the first place.

I haven't tried my PK3s, but at 32ohms, they don't need amplification, and I think they would be too sensitive for the Raging Moose. And how the Moose compares power wise to the buffered dacs..well, Dave will have to chime in.

It's not all about resistance, though. The W1000s sounded worse than the RX700s to me, for example. They're also a much more sensitive can, so they should sound worse.

The USB1 and Dac Destroyer have the same power output, so I assume they'll drive the same...I felt the Ultrasones were just slightly not loud enough, but the RX700s could be pushed more than comfortably loud by just the USB1. Those extra 6ohms shouldn't matter.

However, if the M50s are current happy...then you probably won't get enough juice from just the Destroyer. The Ultrasones sounded better once amped, not to mention louder.

If you were just sticking with the M50s, the destroyer would probably be fine. But if you get a pair of higher impedance cans later you'll absolutely need an amp, and you might be able to save some money by getting a buffered dac now...ah, decisions decisions.

Those attenuators are sounding like the right route to me.
post #486 of 771
my experience :

mark IV + D1001 (32 ohm, sensitivity - 103 db/mw) - significant hiss.

mark IV + DT231 (32 ohm ) - hissing, doesn't affect music much.

mark IV + HD201 (24 ohm ) -hissing, doesn't affect music much.

the phones do sound a lot better with the amp though. Bass has extended lower, highs are better controlled and resolution is better.

If only there was no hiss

the attenuators are too costly for me.
post #487 of 771
Quote:
Originally Posted by Bones2010 View Post
This hissing problem has got me wondering what's the best solution for my needs. I have Audio Technica ATH-M50's. 38 ohm resistance - 99db sensitivity. Would the dac destroyer be plenty for me? or would I still see benefits from going for the supreme? any help greatly appreciated.
FWIR and in my opinion...

While the DAC Destroyer "may" be plenty for you, especially if not comparing the two, you definitely would see benefits with the Supreme, and it definitely would be worth it.
post #488 of 771

mark VII

Quote:
Originally Posted by Wenglish View Post
It's not purely about volume. While 2200s were sufficiently loud (more or less) for everything but the quietest recordings, they just weren't getting enough current to really sound good. Adding the Raging Moose really tightened up the bass and helped with instrument definition/separation. A buffered output might help in that regard.
I'll start with a caveat: I'm new to good sound through headphones. I've had reasonable exposure to good near-field and far-field equipment, but phones are new to me.

I took Wenglish's advice about 10 days ago and ordered a HotUSB mark VII (rather than the DAC destroyer I was considering). It arrived in the mail today. That makes for ~8 days transit time from Winnipeg to Amsterdam, the Netherlands... not bad at all. I'm using the buffered DAC to drive a set of Beyerdynamic DT770 pros at 80 ohms.

There's a comment in this thread that Dave's products look better in person than in the photos on his site... that is certainly true of this little DAC. It has a good solid feel about it... if it had a door, the door would slam shut like a BMW, not the Hyundai that the website photos suggest.

To get to the point, I'm astonished with how much better sound is on the DT770s when driven by this buffered DAC. This is an early assessment, as I've got about 6 hours burn time on it right now, but I understand that things will only get better... and I'm very pleased already.

I've had the beyers for about 3 months and have been listening to them from the output on a macbook. When I first received these phones I was a little disappointed; from my lurkings around this site I understood that the DT770s should be really bassy... even too much so. Jacked from my macbook I never got that from them... bass was reasonable, but a bit muddy and ill-defined. In fact the phones sounded quite bright and trebly. No matter how much I tried to convince myself otherwise, my 35 euro Sennheiser HD202s sounded better.

A different beast lives in my phones now. The bass is huge and beautifully defined. The soundstage is much larger and definition between instruments is crisp and clean.

Headphones and associated amps/dacs/etc are often spoken of as having a great cost-benefit ratio; for reasonable cash you get great sound. This appears to be doubly true of Dave's product; this little 80 euro DAC makes as big a difference to my listening experience as far more expensive near-field purchases have in the past.

I could rave further; the point is that I can't recommend the Mark VII with the DT770s enough. If you've got the DT770s (80 ohm) and you're looking for a single DAC/amp unit, the Mark VII is a great option.

Some specifics: I understand that the Mark IV has a little more oomph; my max with the 80 ohm beyers and the Mark VII, with quiet recordings, is about 60% volume... but I'm not a fan of bleeding ears. With a friend's Sennheiser HD590s (35 ohm) and the Mark VII I can't get past about 40% without discomfort.

I may be kidding myself, but I have the feeling that I can hear the difference between bit-perfect output on the macbook and regulated output (ie. when all software volume is at 100% and volume is regulated with the DAC pot, versus when I use software to regulate the volume). The Mark VII is Dave's only DAC products with a pot (I think?), so this might be a consideration for anyone trying to decide within his product range.

Alright, that's it for now. Thanks Dave for making my music sound better (for cheap!).

edit: The volume pot doesn't go up quite as far as I thought! It only turns about 270 degrees, rather than the ~360 I was expecting. This means that my judgments of volume above are a bit over the mark. I'm very happy with the range of volume offered; for those who like it really, really, really loud and are listening on 80 ohm or higher resistance cans... it might be worth thinking about putting an amp after the MarkVII, or considering the more powerful Mark IV.
post #489 of 771
To Dave or anyone who knows...

Would I be better off with the Destroyer or Mark IV with a stand alone desk top amplifier?

I haven't purchased the amp or the headphones yet. The headphones would probably be in the 50 to 100 Ohm range. The amp would be a desktop model, but not sure yet which one.

Would the desktop amp be put to better use with the Destroyer or Mark IV or either one?

Thanks
post #490 of 771
If you only ever plan on having it hooked up to an amp and never using it to drive headphones directly, the DAC STRAIGHT would be my suggestion.
post #491 of 771
Quote:
Originally Posted by appositive View Post
I took Wenglish's advice...
People are listening to me?! The horror!

Seriously, I'm glad you're happy with the VII and 770s. That next step in sound quality is always great...until you decide you need more. My wallet perishes the thought of my next setup...but the Dac Straight -> EF 1 -> F1001ish is really awesome to my ears, so hopefully my next big upgrade is a while off.

Quote:
Originally Posted by 1Time View Post
To Dave or anyone who knows...

Would I be better off with the Destroyer or Mark IV with a stand alone desk top amplifier?

I haven't purchased the amp or the headphones yet. The headphones would probably be in the 50 to 100 Ohm range. The amp would be a desktop model, but not sure yet which one.

Would the desktop amp be put to better use with the Destroyer or Mark IV or either one?

Thanks
If you plan on using a desktop amp and only that, I would probably recommend the Dac Straight. Granted, you cannot run headphones directly from the DS--whatever you plug it into needs a 5k ohm input impedance.

But...you get a better DAC with the DS, the 2702 (the Mark IV and Destroyer use the 2705, iirc). The downside is you can't run headphones from it...but if you were always going to use it with a desktop amp, it's probably the way to go.

I'm not sure how the buffered output of the MarkIV would react to being amped, so if I was going to choose between the two, I'd pick the destroyer.
post #492 of 771
Quote:
Originally Posted by Wenglish View Post
I'm not sure how the buffered output of the MarkIV would react to being amped, so if I was going to choose between the two, I'd pick the destroyer.
That's pretty much what I'm wanting to know, whether the headphones would make better use of the desk top amp from the Destroyer or Mark IV. I'm not so much concerned with the differences in sound between the DACs as I'm convinced they all sound great. I'm more concerned with whether the desk top amp would drive the headphones better with one or the other. Thanks
post #493 of 771
The DAC STRAIGHT is the way to go if you ONLY intend to drive an amplifier as it CAN NOT drive headphones directly.

The DAC STRAIGHT is a MAX'ED out PCM2702 which is supposed to be one of Burr Browns BEST DACs....

But it can only drive loads above 5000 Ohms.

Next in line for driving amps, I'd say is the DAC DESTROYER as it still has plenty of voltage to drive amps and sounds amazing in my mind.

And of course it will also drive headphones very well too....
post #494 of 771
Right, I understand the idea of using the DAC Straight.

But between the Destroyer and Mark IV, would there be an advantage / disadvantage in terms of the performance of the desk top amp when used with one or the other?

Thanks again.
post #495 of 771
Quote:
Originally Posted by 1Time View Post
Right, I understand the idea of using the DAC Straight.

But between the Destroyer and Mark IV, would there be an advantage / disadvantage in terms of the performance of the desk top amp when used with one or the other?

Thanks again.
Well the MARK IV has more power so it drives amps harder and you get a more powerful sound, with more punch and dynamics.

But with the DAC DESTROYER, it still drives an amplifier pretty hard and is slightly warmer and maybe even a little more detailed as it isn't going through another buffer stage.

Normally I use the DAC STRAIGHT or DAC DESTROYER when listening to my amplifier and speakers as I don't play my music to extreme levels.

But if you like tunes like "SHE"S SO COLD" by the STONES, for example, then you might enjoy the extra drum pounding that the MARK IV can accomplish....
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