Differents Of the "DVR134" & "BOSOZ"

[thomasfw]

Anyone, can tell more the different in between the "DVR134"
and "BOSOZ".

Where I can get the schematic and PCB layout for DVR134 ?

If, using OPT, how is the wiring and values (p-p) ?

Thanks !

[pinkmouse]

DRV134.
BOSOZ, (second item down the page).

[metalman]

DRV134 is an IC that converts a single-ended signal to differential. The BOSOZ is an entire preamp that can run single-ended to balanced, balanced to single-ended, balanced to balanced, or single-ended to single-ended (i.e. any combination you like).

[Nelson Pass]

The circuits are like night and day. I leave it to you
to figure out which is which.

[pinkmouse]

I vote for the BOSOZ as night, after all, the fun starts when the lights go out!

[metalman]

Oh yeah, I should mention that I just finished building a modified BOSOZ (all modifications suggested by Mr. Pass), and it is a simple circuit to build, and it is very impressive. In the last three days since I got it up and running, I've spent more time enraptured by music than I have spent listening to it it within the last three years.

[Nelson Pass]

Hail MetalMan:

Lately I have received a number of requests by
guys who want to use it as a se to balanced
converter. Would you like to post your schematic?

[metalman]

Why do I suddenly feel WAY to big for my britches.

Well, thank you very much for suggesting that my schematic is worthy of consideration. As to posting it ... well ... actually I already have HERE

Now I gotta go find where my socks landed after they got knocked off.

EDIT:
Forgot to mention, of course, that to use as a converter, you need to connect the negative signal terminal of the single-ended side.
i.e. if SE input, ground -in, if SE ouput, ground -out.

[thomasfw]

I have studied your schemtic, thank you very much !

Other questions :
a)What is the gain of the line-amp, how to calculate it ?

b) If I use it as SE input and SE output, will the sound get worse due to the somethng like "Half Load" ? Someone said in such case,the unused o/p should loaded with a "R & C".

c) Do you have the PCB layout ?

Best Regards !

[metalman]

What is the gain of the line-amp, how to calculate it?

The gain of my posted circuit is just a hair over 13dB. I don't have an exact way to calculate it, but it is roughly related the ratio of feedback to input resistor, i.e. (R15+R19)/R19. The actual circuit gain is about 2dB below that calc.

If I use it as SE input and SE output, will the sound get worse due to the somethng like "Half Load" ? Someone said in such case,the unused o/p should loaded with a "R & C".

With my BZLS I just simply ground the negative input and output when I use SE on both ends. If there is a performance penalty to doing so, I haven't been able to detect it. That being said, I don't know if there is any benefit to loading the negative output. Perhaps others more knowledgable could comment.

Do you have the PCB layout ?

Nope. It is a pretty simple circuit, and I only planned on building it once, so I didn't bother with the effort of creating a PCB and just built it on perfboard. I do have a layout for that, which is attached below.

Cheers, Terry