Double variable outputs for BOSOZ

[gchrist]

I have made the BOSOZ for some years now and everything worked out ok. I have recently constructed a subwoofer for my main speakers but my preamplifier has only one variable ouput.

How can I install a second variable output for the subwoofer or for a second power amplifier? Do I simply connect in parallel another output together with the one that I now have? Will this lower the output signal on both autputs? Is there onother way of doing this?

Thank you
George
Athens, Greece

 

[Zen Mod]

I have made the BOSOZ for some years now and everything worked out ok. I have recently constructed a subwoofer for my main speakers but my preamplifier has only one variable ouput.

How can I install a second variable output for the subwoofer or for a second power amplifier? Do I simply connect in parallel another output together with the one that I now have? Will this lower the output signal on both autputs? Is there onother way of doing this?

Thank you
George
Athens, Greece

balanced or unbalanced ?

if additional volume results in lowering present output , just make buffer with IRF as source follower . you have everything needed already in box ........ meaning on PSU

 

[gchrist]

Thanks for the reply,

I need a non balanced output.
My main background is in economics so I do not understand your whole answer. Can you make it more simply or can you point me to a link where I can get more info?

Regards

 

[Zen Mod]

Thanks for the reply,

I need a non balanced output.
My main background is in economics so I do not understand your whole answer. Can you make it more simply or can you point me to a link where I can get more info?

Regards

post exact circuit (schematic) you use ,and I'll answer ;

 

[gchrist]

The circuit I am using is the original BOSOZ circuit from passdiy.com

 

[Zen Mod]

The circuit I am using is the original BOSOZ circuit from passdiy.com

well - that's one of few files from Papa's sites I don't have

 

[moe29]

Zen Mod, here's the schematic... remove my post if it's not ok to post it up.

 

[Zen Mod]

gchrist
if I understood you correctly - you are using BOSOZ unbalanced ?

in that case - un-tie negative output from gnd , take signal from it to your subwoofer amp,and then set desired phase directly at speaker (reversing leads on speaker , to achieve adequate polarity of acoustic output)

 

[gchrist]

thanks, clever answer.

I will try it.

 

[moe29]

and if you are using the balanced outputs?

... i think i would like to add a sub-out to my BZLS, but i use the
balanced outs.

 

[Zen Mod]

and if you are using the balanced outputs?

... i think i would like to add a sub-out to my BZLS, but i use the
balanced outs.

did you want balanced or unbalanced to woof amp?

in acse of balanced - just parallel it

in case of unbalanced - just route it from + out and gnd to RCA jack; you'll have -6db ....