or Connect
Head-Fi.org › Forums › Equipment Forums › Computer Audio › Auzentech X-fi Bravura 7.1 Sneak Peek
New Posts  All Forums:Forum Nav:

Auzentech X-fi Bravura 7.1 Sneak Peek - Page 17

post #241 of 445
Quote:
Originally Posted by leeperry View Post
OPA637 is not recommended w/ the Bravura: Auzentech: OPAMPS

it's only stable for >4 gain, so clearly not a drop-in replacement to the stock LM4562NA.
Ok, well, how about the 627SM.
post #242 of 445
utter waste of money? you can get a Burson V2 for the price of two of these things.



if you wanna cure digitis, that's where the party's at
post #243 of 445
Thread Starter 
Quote:
Originally Posted by leeperry View Post
OPA637 is not recommended w/ the Bravura: Auzentech: OPAMPS

it's only stable for >4 gain, so clearly not a drop-in replacement to the stock LM4562NA.
Actually, the 637's work just fine on that card. The discretes are nice but just another flavor of opamp.
They are far from the be all to end all of opamps. You will learn that once you test more units and get a bit more experience under your belt. To note, it is actually gains >5...
post #244 of 445
Thread Starter 
Quote:
Originally Posted by Tantalus000 View Post
Ok, well, how about the 627SM.
You would be better off talking with people that actually own the card.
The 637 works fine on the Bravura 7.1. I would keep things in perspective though as they are twice the price of the card. There are many great units out there. You don't need to go nuts and drop $250...
post #245 of 445
Quote:
Originally Posted by ROBSCIX View Post
You would be better off talking with people that actually own the card.
The 637 works fine on the Bravura 7.1. I would keep things in perspective though as they are twice the price of the card. There are many great units out there. You don't need to go nuts and drop $250...
The 637SM's are $35 with shipping each, I'm assuming I'll need two of them so lets say $70+ the cost of the adapter board. On Azunentechs website its like $250 for the setup for both the IC's and the adapter board. Just looking to save some money. The 637BP is pretty cheap at $51 but its not the "can" version.

2x OPA637BP With adapter High-Speed Difet Op Amp OPA637 - eBay (item 360213678805 end time Mar-31-10 20:11:48 PDT)
post #246 of 445
Quote:
Originally Posted by ROBSCIX View Post
I use custom built opamps for every output on that card.
Yes, you plug the headphones into the 1/4" output. The top opamp is for the can amp.

If you want to drive an external headphone amplifer, you would connect that to the line outputs.
I have seen people driving one headphone amp using the output of another but that can cause trouble with distortion and lower your SNR.
Ok, I've scoured eBay and i've found the 627 and 637 direct swap in opamps in the adaptor board already but I want to try the 637SM. Found a seller with the can 637SM opamps but without the adaptor board (just the IC itself). I'm no stranger to soldering, where can I find the adaptor board that I can solder those bad boys into to plug into this thing?
post #247 of 445
Thread Starter 
Quote:
Originally Posted by Tantalus000 View Post
The 637SM's are $35 with shipping each, I'm assuming I'll need two of them so lets say $70+ the cost of the adapter board. On Azunentechs website its like $250 for the setup for both the IC's and the adapter board. Just looking to save some money. The 637BP is pretty cheap at $51 but its not the "can" version.

2x OPA637BP With adapter High-Speed Difet Op Amp OPA637 - eBay (item 360213678805 end time Mar-31-10 20:11:48 PDT)


Well many like the metal can version because they are the highest greade of any opamp series. The 637's are similar to the 627s but they have a bit more upper end. I know most of my favorites are TO-99 metal can opamps.
Whay are you starting out with these? There are many other opamps that you would like that are not so pricey to start out with.
post #248 of 445
Quote:
Originally Posted by ROBSCIX View Post
Well many like the metal can version because they are the highest greade of any opamp series. The 637's are similar to the 627s but they have a bit more upper end. I know most of my favorites are TO-99 metal can opamps.
Whay are you starting out with these? There are many other opamps that you would like that are not so pricey to start out with.
I don't mind spending the money, I just want the best. What would you personally recommend to start out with for just the can amp section of the card?
post #249 of 445
Thread Starter 
Quote:
Originally Posted by Tantalus000 View Post
I don't mind spending the money, I just want the best. What would you personally recommend to start out with for just the can amp section of the card?
Whoa, stop right there. No such things as "the best"... This hobby is totally subjective. What I like and find great you may find mid grade..etc.
The AD8620, Dual LME49710HA,LME49720HA..OPA2111AM..you might like the AD797...OPA827
I could write two pages of units you might like, there are many flavors of opamps and your gear also plays a part in what the end results will be.
post #250 of 445
Quote:
Originally Posted by ROBSCIX View Post
Whoa, stop right there. No such things as "the best"... This hobby is totally subjective. What I like and find great you may find mid grade..etc.
The AD8620, Dual LME49710HA,LME49720HA..OPA2111AM..you might like the AD797.
I could write two pages of units you might like, there are many flavors of opamps and your gear also plays a part in what the end results will be.
Anything that gives a more open "airy" space than the stock headphone amp. It seems a little closed and tight. I don't mind trying out a lot until I find the right one, thats the fun in it right? I'm running the headphone amp straight into my DT-770's right now.
post #251 of 445
Thread Starter 
Opamps can get to be a hobby in itself. The stock opamp is the LME49720NA... Which is basically a LM4562NA. If you like the sound of that family but want a little more refinement the LME49710HA -dual metal can unit may work better for you.
I have also been testing a OPA2111AM lately and that sucker has some great sound.
It is hard to recommend units to others as they have different gear and tastes.

Is it just the sound stage you don't like?
post #252 of 445
ROBSCIX, what op-amp would you recommend for the front out? Thank you. I wouldn't change the op-amps for the headphone output right now, as the sound is so good that I don't wanna touch it for now. But I think I need a wider stereo image on the front out.
post #253 of 445
Thread Starter 
Quote:
Originally Posted by JulienS View Post
ROBSCIX, what op-amp would you recommend for the front out? Thank you. I wouldn't change the op-amps for the headphone output right now, as the sound is so good that I don't wanna touch it for now. But I think I need a wider stereo image on the front out.
I was using a dual LME49710HA module as seen in the picture. That unit sounds similar to the sound on the can out but has some refinements. Right now though, I am testing out some OPA2111AM's...
They are some high end metal can opamps, I had heard some great things about them so I bought up a few and built some modules and so far I have been really impressed.

When you listen to the card, what is wrong with he front out? -This is just a question to help me understand what you are looking for. The stock opamp is a NJM5532 which is a generic audio opamp, it has a gritty, warm type of sound to it. There are many opamps that are considered much better then this unit.
post #254 of 445
I knew I should have come here first. I, too have a Bravura and I am interested in upgrades.

Does anyone have a good explanation to the modes and the mode buttons?

I also don't care for the front stereo opamps. I loved my Revo and would like something to get me closer to that. I have the M-Audio LX4 speakers if that helps anyone.
post #255 of 445
Thread Starter 
The mode buttons are explained in the manual. They are basically there for different types of cans and microphones.

The stock opamps actually sound reasonable on this card but the card can sound so much better with some opamap upgrades. They are meant to be changed out so Auzentech used generic opamp to keep the price down.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Computer Audio
Head-Fi.org › Forums › Equipment Forums › Computer Audio › Auzentech X-fi Bravura 7.1 Sneak Peek