Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

[cubdenno]

I recommend the Fluke 87.

[DIYMA]

[Megalomaniac]

cheap craftsman ones work fine. differences will only be decimal differences.

[Andy Wehmeyer]

Originally Posted by BenVollmer

He was waiting for the MS8 to ship first....

When he has one of those, he won't need a DMM.

[thehatedguy]

Any standard dual SMD opamp would be a direct fit. Depending on what flavor you are looking for, I would start looking at Burr Brown OPA 2604s, 2107s, 2227s, Analog Devices 8499, and National Semiconductor LM4592s. TangentSoft and Head-Fi have reviews of different opamps.

Expect to pay $6-15 each for the duals.

If you wanted to get real trick, some Burr Brown OPA-627s on adapters would go too.

I have changed out JRC/NJR opamps in my Rane, Benchmark DAC1, and DSP-6 for some of the above chips and have always noticed a significant increase in SQ.

Capacitors, OS-Cons, Panasonic FCs, and Elma Cerafines would do the job really well without being super expensive like Black Gates. Larger values will offer better performance...as would putting through hole caps in place of the surface mounts.

[bikinpunk]

I'll send you $50 and you can mod mine for me. Maybe we can audison warranty it, too.

lol

[autofile]

If it were yours, what would YOU do?

Please indulge me and excuse my ignorance here, but I am not fluent in the differences in opamp sound qualities or small cap sound qualities either.

Passive crossover components I know, but small circuit components not so much ;^)

Originally Posted by thehatedguy

Any standard dual SMD opamp would be a direct fit. Depending on what flavor you are looking for, I would start looking at Burr Brown OPA 2604s, 2107s, 2227s, Analog Devices 8499, and National Semiconductor LM4592s. TangentSoft and Head-Fi have reviews of different opamps.

Expect to pay $6-15 each for the duals.

If you wanted to get real trick, some Burr Brown OPA-627s on adapters would go too.

I have changed out JRC/NJR opamps in my Rane, Benchmark DAC1, and DSP-6 for some of the above chips and have always noticed a significant increase in SQ.

Capacitors, OS-Cons, Panasonic FCs, and Elma Cerafines would do the job really well without being super expensive like Black Gates. Larger values will offer better performance...as would putting through hole caps in place of the surface mounts.

[t3sn4f2]

[bikinpunk]

Originally Posted by t3sn4f2

x2.

If I knew what the heck these guys were talking about I'd be excited. But, I have no idea how to remove chips from boards, so I'll just keep my eyes open and maybe try to learn something.

carry on, gentlemen...

[t3sn4f2]

Originally Posted by bikinpunk

x2.

If I knew what the heck these guys were talking about I'd be excited. But, I have no idea how to remove chips from boards, so I'll just keep my eyes open and maybe try to learn something.

carry on, gentlemen...

I'm just ready for the lol.

[bose301s]

So, how much does the Bit One actually cost?

[ArcL100]

Originally Posted by bose301s

So, how much does the Bit One actually cost?

More then you can afford pal, Audison *revs car*

[Tonyguy]

Originally Posted by ArcL100

More then you can afford pal, Audison *revs car*

I know what you're talking about

[Grim0013]

Originally Posted by thehatedguy

Any standard dual SMD opamp would be a direct fit. Depending on what flavor you are looking for, I would start looking at Burr Brown OPA 2604s, 2107s, 2227s, Analog Devices 8499, and National Semiconductor LM4592s. TangentSoft and Head-Fi have reviews of different opamps.

Expect to pay $6-15 each for the duals.

If you wanted to get real trick, some Burr Brown OPA-627s on adapters would go too.

I have changed out JRC/NJR opamps in my Rane, Benchmark DAC1, and DSP-6 for some of the above chips and have always noticed a significant increase in SQ.

Capacitors, OS-Cons, Panasonic FCs, and Elma Cerafines would do the job really well without being super expensive like Black Gates. Larger values will offer better performance...as would putting through hole caps in place of the surface mounts.

Those are the same opamp recommendations I keep seeing people mentioning when upgrading PC sound cards when building high-end HTPCs. Same thing on the caps too.

[thehatedguy]

2604 is a good balanced opamp, typical Burr Brown laid back style. 2227 is considered to be a little more dark and tubey sounding. 2107 is as close as you'll get to the 627 in a dual opamp design. Analog Device opamps are generally thought to be more forward sounding and leaner on the bottom end compared to the Burr Browns. I have no experience with the LN4562s, but some consider them to have the best of the Burr Brown and Analog device characteristics- great bass, fast mids, and extended highs. This is the chip DEQX uses in their upgrade to their processor.

Correction, should be AD8599.

The caps are all about better power delivery to the opamps. Lower ripple voltage and lower ESR/ESL means better power delivery to the cheap..increased capacitance has benefits too. Through hole caps have better specs than their SMD counter parts. Nelson Pass uses the Panasonic FCs in his amps. Nice capacitor that doesn't break the bank. I have used Black Gates as coupling caps in my Benchmark DAC1. They are supposed to have film cap qualities as opposed to electrolytic qualities. The Elma Cerafines are supposed to be the next best thing after BG. And since BG is no longer producing capacitors, selection is getting tough and prices are going way up. Good thing is Digikey sells all of the opamps, and Panasonic and Elma capacitors. For SMD OS-Con types you will have to get them at Mouser.

Opamps:

Notes on Audio Op-Amps

It's all about what you like...what your tastes are. Trust your ears.

[Grim0013]

Originally Posted by bikinpunk

x2.

If I knew what the heck these guys were talking about I'd be excited. But, I have no idea how to remove chips from boards, so I'll just keep my eyes open and maybe try to learn something.

carry on, gentlemen...

I'll see if I can dig you up some links to some good guides I've been checking out. I have them bookmarked on my work machine I think, so I'll check tommorow.

[thehatedguy]

If you want to have baller status, then some BB 627s on Browndog adapters would probably be it. But being single devices, you would have to buy 2 per channel. So, you are looking at $36-52 per channel for opamps plus the adapters.

Next baller status would be the LM4562s. Much cheaper at only $4.50 each and are dual packages.

I do like the OPA2107s in my DAC1 though. $12.25 each.

Big difference from the 8 cent opamps in there now.

[slvrtsunami]

im still excited about the digital inputs!!

[thehatedguy]

Yeah it is pretty pimp to have a choice between toslink and coax.

[bose301s]

Originally Posted by ArcL100

More then you can afford pal, Audison *revs car*

And how do you know this?

[quality_sound]

It was sarcasm...and a line from he Fast and the Furious...relax.

[quality_sound]

Originally Posted by thehatedguy

If you want to have baller status, then some BB 627s on Browndog adapters would probably be it. But being single devices, you would have to buy 2 per channel. So, you are looking at $36-52 per channel for opamps plus the adapters.

Next baller status would be the LM4562s. Much cheaper at only $4.50 each and are dual packages.

I do like the OPA2107s in my DAC1 though. $12.25 each.

Big difference from the 8 cent opamps in there now.

So...say I had a Bit One and wanted to swap out the opamps...having the soldering skills of a retarded Bonobo monkey during mating season...would you be willing to do the work? Compensated for your time of course.

[bose301s]

Originally Posted by quality_sound

It was sarcasm...and a line from he Fast and the Furious...relax.

I've never seen that movie, so that's probably why I didn't get it, lol.

[thehatedguy]

I don't have enough time to work on my own stuff these days. Email Matt Roberts, he might could help you out. Any electronics repair place could do the soldering for you too. I'm working about 60 hours a week, going to school, and trying to get my car done in the mean time.

[bikinpunk]

lol. Who woulda thought there would be a fast & furious reference in this thread?


*grabs popcorn and puts in F&F 2*

[dvflyer]

Originally Posted by bikinpunk

I don’t have a DMM anymore. I had been borrowing one for 2 years and just gave it back last week.

With as much as you change out equipment you might want to stick to borrowing... might save you money in the long run.