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smrex13
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Last seen: 4 months 3 weeks ago
Joined: Dec 3 2013 - 1:44pm
Hooked up a subwoofer - affected my treble - HELP!

Hi everyone,

I just hooked up a subwoofer to my stereo setup for the first time and got an odd result.  I am currently running an Acurus DIA 100 with Focal Chorus 706v stand mount speakers.  I like the sound, but I wanted to add a bit to the bottom end.  I got an SVS SB 1000 and hooked it up.  The Acurus doesn't have a pre-out.  So, as suggested in the directions, I ran two speaker wires from each of the binding posts - one to the speaker and one to the subwoofer.  The result has been a rather obvious reduction in the detail and transparency of the treble.  The amp also doesn't seem to play quite as loud as it did without the sub.  Any thoughts on what might be causing this?  I've used bi-wired speakers in the past with my Acurus (and the same speaker cables) without issue.  

Thanks for any help!

Scott

Kal Rubinson
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Joined: Sep 1 2005 - 9:34am
Off hand, I do not know

Off hand, I do not know although this is usually an acceptable, if suboptimal, way to connect a sub in such situations.  My suggestion would be to contact SVS as they have lots of experience and, likely, have dealt with this before.

commsysman
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Joined: Apr 4 2006 - 11:33am
Problem...Solution?

First, run speaker wires direct to your speaker from the amplifier, but NOT to your subwoofer.

Second, run wires from one speaker's LF terminals to the subwoofer's LFE RCA (low-level) input, BUT with 10,000 ohm resistors in series (in-line) with each wire between the speaker and subwoofer. Be sure to insulate all connections with heatshrink sleeving so nothing will short out.

This will prevent the loading that is affecting your speaker system and get a usable input signal to your subwoofer.

This is a quick fix for the problem, but it is also true that the subwoofer's high-level input  is defective, or it wouldn't be loading down your amplifier like that.

The high-level subwoofer input is specified to have a 2000-ohm input impedance, which should have no effect whatsoever on your amplifier or speaker. If it is a new unit, I would demand that the seller replace it.

smrex13
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Last seen: 4 months 3 weeks ago
Joined: Dec 3 2013 - 1:44pm
Thanks for the suggestions,

Thanks for the suggestions, guys.  I actually hooked up the subwoofer to my small bedroom system that has a subwoofer out, and the exact same thing happened.  So, I'm guessing it's a problem with the subwoofer and not with the way I hooked it up.

Happy New Year to all!

Scott

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