Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap) - Car Audio | DiyMobileAudio.com | Car Stereo Forum

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Old 01-03-2009   #1
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Default Audison Bit One Guts (Hi-res: 56k, Go make some coffee and take a nap)

Didn't want to, but had to take this apart to make sure the bit one wasn't the culprit of my EMI issues. Figured I'd snap some pics while I was at it. I don't know wtf I'm really looking at, but figured some of you EE guys might enjoy seeing this.

Pictures should be plenty self explanatory, but I provided some sort of 'legend' just in case.

(and, no, the bit one isn't the issue)


















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Old 01-03-2009   #2
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)
















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Old 01-03-2009   #3
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

Those junk JRC opamps would be the first thing I would change out. Next would be the caps next to them.
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Old 01-03-2009   #4
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

ugh...you're killin' me Erin!! lol

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Old 01-03-2009   #5
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

Fred never came up with an answer on the other post but Can BItone sum a pair of outputs to mono?

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Old 01-03-2009   #6
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

i can see 3 cold solder joints.





























































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Old 01-04-2009   #7
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

That's a relatively small processor, pretty cool.
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Old 01-04-2009   #8
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

I asked over there, too... but does anyone know if this has balanced outputs? I don't have a way to tell.

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Old 01-04-2009   #9
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

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Originally Posted by thehatedguy View Post
Those junk JRC opamps would be the first thing I would change out. Next would be the caps next to them.
What's so bad about the parts iniside?

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Old 01-04-2009   #10
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

JRC is old brand, now is NJR....
Maybe you will have hardware support problem when any of these opamps failed.
I once faced with such problem and unable to find a replacement because JRC put very very minimum infos on their products nulike Texas Instruments.
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Old 01-04-2009   #11
 
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

Well, you might prefer other opamps, but I can say one thing: the BitOne is an exceptionally good sounding unit.

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Those junk JRC opamps would be the first thing I would change out. Next would be the caps next to them.

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Old 01-04-2009   #12
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

Truth. I love the way this thing sounds. I'm only running iPod source right now, but it sounds great and truly sounds more refined than the h701. I"m not about to say it's leaps and bounds better... at least not until I can properly set things up, but for now, I'll just say that I'm not sorry I made the switch in the least bit.

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Old 01-04-2009   #13
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

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Originally Posted by bikinpunk View Post
Truth. I love the way this thing sounds. I'm only running iPod source right now, but it sounds great and truly sounds more refined than the h701. I"m not about to say it's leaps and bounds better... at least not until I can properly set things up, but for now, I'll just say that I'm not sorry I made the switch in the least bit.
I still haven't really found anywhere that I can get one. Are these pretty much unobtainium right now?

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

not sure if this was covered in another thread, but do you happen to have the dimensions of the unit and the controller?
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Old 01-05-2009   #15
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

You could take the sound of that processor up several notches with an opamp change. Big notches.
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Old 01-05-2009   #16
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

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Originally Posted by HIS4 View Post
I still haven't really found anywhere that I can get one. Are these pretty much unobtainium right now?
pretty much.

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Old 01-05-2009   #17
 
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

Quote:
Originally Posted by thehatedguy View Post
You could take the sound of that processor up several notches with an opamp change. Big notches.
Interesting. Which opamps would you recommend as "direct, plug in" replacements? (as in no mods to the board other than desoldering old opamps and soldering in the new opamp, no jumpers, etc etc.

What sonic benefit would they achieve over the stock opamps?

Same question about the caps you mention earlier.

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Old 01-05-2009   #18
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

Coax and toslink inputs!! yeeehaw... I saw one portable player with optical out, that's about it. That'd be the bomb running direct digital from a player as a "music server" to this thing.
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Old 01-05-2009   #19
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

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Originally Posted by bikinpunk View Post
I asked over there, too... but does anyone know if this has balanced outputs? I don't have a way to tell.
You can tell for sure that it does NOT have them if you find continuity between the output shields and chassis ground.

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Old 01-05-2009   #20
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

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Coax and toslink inputs!! yeeehaw... I saw one portable player with optical out, that's about it. That'd be the bomb running direct digital from a player as a "music server" to this thing.
Plus, you can EQ the sources on the bit one. So, if thereís something you donít like about the source, you can EQ it. THEN you can EQ the environment on the overall EQ.

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You can tell for sure that it does NOT have them if you find continuity between the output shields and chassis ground.
I donít have a DMM anymore. I had been borrowing one for 2 years and just gave it back last week.

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Old 01-05-2009   #21
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

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Originally Posted by bikinpunk View Post
Plus, you can EQ the sources on the bit one. So, if thereís something you donít like about the source, you can EQ it. THEN you can EQ the environment on the overall EQ.
And though folks might not think it to be a big deal.. direct digital in means just one single solitary D/A conversion as it should be. Cleeeeeean!
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Old 01-05-2009   #22
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

Well, by knowing the technical details(briefly) on some of the main ICs, it only have 4 codecs(ADC and DAC together in 1 single IC, which will reduce noise if were compare to H701)
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Old 01-05-2009   #23
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

Quote:
Originally Posted by bikinpunk View Post


I donít have a DMM anymore. I had been borrowing one for 2 years and just gave it back last week.
Go to Sears and buy one for 20 bucks.

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

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Originally Posted by Andy Wehmeyer View Post
Go to Sears and buy one for 20 bucks.
He was waiting for the MS8 to ship first....

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Old 01-05-2009   #25
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Default Re: Audison Bit One (Hi-res: 56k, Go make some coffee and take a nap)

Quote:
Originally Posted by kyheng View Post
Well, by knowing the technical details(briefly) on some of the main ICs, it only have 4 codecs(ADC and DAC together in 1 single IC, which will reduce noise if were compare to H701)
Thatís why I posted picsÖ for someone to start picking it apart.



Quote:
Originally Posted by Andy Wehmeyer View Post
Go to Sears and buy one for 20 bucks.
Am actually trying to find a good fluke trueRMS meter, but itís not easy finding one for cheap (ie: under $200).
Guess a multimeter is a multimeter for my purposes, though.

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