Subwoofer Connection

[amritdesai]

I'm reaching out because I'm not entirely sure if it's possible to hook my subwoofer up to the Stereomour II. Does anyone have any recommendations as to how I can accomplish this? I purchased on a whim, a Zu Audio Undertone subwoofer maybe making a few incorrect assumptions about integrating it into my system. So far, I've managed to come up with a few options.

1. Utilizing speaker outputs for subwoofer
2. Second preamp output - is this possible?
3. Wiring signal from switch to 3rd (unused) RCA - not sure how to control volume

Any help would be appreciated.

Thank you.

Amrit

 

[Paul Joppa]

Choice #1 will work; the risk is that the residual hum from the 2A3 AC filament power may be more audible. The DC filament supply kit will reduce that hum quite a bit - I don't remember the actual amount, but we did measure it.  :^)

Taking the output from between the driver and power sections is possible in theory, but it's a bit complicated and I am not aware of anyone having tried it.

https://bottlehead.com/product/dc-filament-supply-for-stereomourii-amplifier/

 

[amritdesai]

Paul,

I just talked to the Zu guys and a speaker level connection is actually preferred. I have the DC filament upgrade already installed so hopefully there will be no audible hum.

Thank you for your response!

Amrit

 

[rockdrummer]

Hi, I have the original Stereomour. I ordered rca splitters from Blue Jeans Cable and split the preamp signal before the Stereomour. I run 4 12" servo subs and 2 servo amps and it is very quiet. However, I resigned to adjusting 3 volumes then since I don't have a nice preamp, like say a smash or beepree.
Ben

 

[Karl5150]

I run the speaker outs from my Stereomour II to a HP XO. I tap off the input side of the XO to a pair of powered subs. Works well, I only have to adjust sub level occasionally due to source material.

 

[amritdesai]

Thanks guys. I'm having a lot of success with the speaker level connection - the timing seems spot on. I'm blown away the difference the Undertone sub makes - I just can't believe how much music I've been missing!

;D

 

[d_composer]

Hi -- forgive my ignorance, but what is a speaker level connection? How do you have your subwoofer connected to the stereomour II? Thanks!

 

[Paul Birkeland]

Hi -- forgive my ignorance, but what is a speaker level connection?

Binding posts or spring clips that accept speaker wire.

 

[d_composer]

Thanks for the reply! Are the pics in this article accurate for connecting a subwoofer to the stereomour II?
https://www.cnet.com/how-to/how-to-hook-up-a-subwoofer-to-a-stereo-system/

 

[Paul Birkeland]

Yes.

 

[d_composer]

Thanks again!