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Fostex HP-A4 - Page 13

post #181 of 266
Quote:
Originally Posted by plakat View Post
 

 

Just tried both my T90 and my T70 on the A4 (both 250Ohm), on high gain it drives them to far higher levels than I'm willing to listen to. Volume setting at 12:00 (i.e. the marker sitting at the top, halfway through the range) is already much too loud. As I said: I don't see any problem using the A4 with higher impedance cans. It even drives the T1 with 600Ohm impedance to respectable levels, while a bit lower in volume than the 250Ohm headphones its still able to produce levels I'd never use for listening.


great. do you find combo bright?

post #182 of 266
Awesome thanks for the info.
post #183 of 266

My HP-A4 just arrived today. Very impressed with the sound! It sounds better than I thought, considering it is a USB-powered DAC. It drives my HD650 sufficiently well, I could reach around 3 o'clock on the volume pot on high gain before hitting my limit. A definite upgrade from my Dragonfly, very satisfied with it. :) 


Edited by lalala6 - 6/16/14 at 1:03am
post #184 of 266

my current setup, output by rca to alo panam :D

 

post #185 of 266
Quote:
Originally Posted by ahhui90 View Post
 

my current setup, output by rca to alo panam :D

 

 

do you think its an upgrade over pan am internal dac ???

post #186 of 266
Quote:
Originally Posted by vaibhavp View Post
 


great. do you find combo bright?

 

That is of course always a matter of taste, and as I like Beyers products and house sound I may be not the one calling something bright too fast. Given that: No, I don't consider that combinations brighter than expected by the respective headphones signatures.

post #187 of 266

Fostex HP A4 vs Sony PHA 2 ... what do yo guys think?

I have Sony PHA2 but it seems like Fostex is a better unit. I like the fact that it's USB powered.

Do you guys think it's worth switching to Fostex HP A4?

:confused: 

 

Also, I'd like to know more about HP A4... what kind of DAC is it using? wolfson? cirus logic?

What makes it so expensive? not much information is disclosed on their website.


Edited by kawaivpc1 - 6/24/14 at 12:21am
post #188 of 266
Quote:
Originally Posted by kawaivpc1 View Post
 

Fostex HP A4 vs Sony PHA 2 ... what do yo guys think?

I have Sony PHA2 but it seems like Fostex is a better unit. I like the fact that it's USB powered.

Do you guys think it's worth switching to Fostex HP A4?

:confused: 

 

Also, I'd like to know more about HP A4... what kind of DAC is it using? wolfson? cirus logic?

What makes it so expensive? not much information is disclosed on their website.

 

 

It's a Burr-Brown PCM1792A

post #189 of 266
Quote:
Originally Posted by kawaivpc1 View Post
 

What makes it so expensive? not much information is disclosed on their website.

 

Strange... Given its good DAC chips, solid enclosure, input and output options I consider it quite a deal actually. It even comes with a nice looking USB cable...

post #190 of 266
Can anyone compare to Teac-ud301?(or ud-501)
They look pretty similar...
post #191 of 266

Just confirmed that the HP-A4 can indeed roll op-amps. To access the op-amp, unscrew the 4 screws on the top panel, and remove the panel. The op-amp is on the front right side of the HP-A4.

 

Swapped out the stock OPA2134 op-amp for a NJM5532 and the sound got clearer and more detailed! Gonna have lots of fun trying out all my op-amps with the HP-A4. :) 

post #192 of 266

how would you compare HA4's sound to that of AK100 or AK120?

post #193 of 266
Quote:
Originally Posted by lalala6 View Post
The op-amp is on the front right side of the HP-A4. 

 

I don't want to open my unit... is it socketed?

post #194 of 266
Quote:
Originally Posted by plakat View Post

I don't want to open my unit... is it socketed?

Yes, it is socketed.
post #195 of 266

Thanks!

thats nice... I'm tempted to open it and get another OP amp...

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