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December 05, 2019, 04:48:39 AM

Author Topic: Subwoofer Connection  (Read 998 times)

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Offline amritdesai

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Subwoofer Connection
« on: August 15, 2017, 10:48:03 AM »
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
Zu Audio soul Mk II, w radian 475
Zu Mission Cables
Stereomour II, JJ 2a3 40
Clearaudio Concept Wood Ortofon Black
Eros Phono Pre
Schiit Bifrost DAC
Synergistic Research Black Fuses

Online Paul Joppa

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Re: Subwoofer Connection
« Reply #1 on: August 15, 2017, 11:44:37 AM »
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/
Paul Joppa

Offline amritdesai

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Re: Subwoofer Connection
« Reply #2 on: August 15, 2017, 12:05:16 PM »
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
Zu Audio soul Mk II, w radian 475
Zu Mission Cables
Stereomour II, JJ 2a3 40
Clearaudio Concept Wood Ortofon Black
Eros Phono Pre
Schiit Bifrost DAC
Synergistic Research Black Fuses

Offline rockdrummer

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Re: Subwoofer Connection
« Reply #3 on: August 16, 2017, 04:12:54 AM »
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

Offline Karl5150

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Re: Subwoofer Connection
« Reply #4 on: August 17, 2017, 05:48:19 AM »
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.
Karl
Downstairs: Planar3>Eros / X-12>Stereomour II>Tekton OB4.5 & DIY "S8" subs
Upstairs: DIY RP1>Reduction / CD5004>SEX 3.1.1>FH3/DT770 pro
Office: Schiit Modi Uber 2/Sirius Tuner>SEX 2.1.1>µFonken/FF85WK

Offline amritdesai

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Re: Subwoofer Connection
« Reply #5 on: August 25, 2017, 06:13:32 AM »
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
Zu Audio soul Mk II, w radian 475
Zu Mission Cables
Stereomour II, JJ 2a3 40
Clearaudio Concept Wood Ortofon Black
Eros Phono Pre
Schiit Bifrost DAC
Synergistic Research Black Fuses

Offline d_composer

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Re: Subwoofer Connection
« Reply #6 on: October 02, 2017, 04:23:12 AM »
Hi -- forgive my ignorance, but what is a speaker level connection? How do you have your subwoofer connected to the stereomour II? Thanks!

Online Paul Birkeland

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Re: Subwoofer Connection
« Reply #7 on: October 02, 2017, 04:34:55 AM »
Hi -- forgive my ignorance, but what is a speaker level connection?
Binding posts or spring clips that accept speaker wire.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline d_composer

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Re: Subwoofer Connection
« Reply #8 on: October 02, 2017, 11:26:44 AM »
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/


Online Paul Birkeland

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Re: Subwoofer Connection
« Reply #9 on: October 02, 2017, 12:01:25 PM »
Yes.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline d_composer

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Re: Subwoofer Connection
« Reply #10 on: October 02, 2017, 12:16:50 PM »
Thanks again!