2. amps-preamps
  3. 187919-6640

Subwoofer and preamp output impedance

I'm looking to add two SVS subs with Y splitters from my pre outs. My Cary SLP-50 preamp has an output impedance of 1200 Ohms and my Bottlehead Kaiju 300b amp has an input impedance of 100k. Both values are nominal, and I found no info about impedance at sub frequencies. My question for the electrical engineers out there: Would the use of Y splitters create a noticeable bass roll off (or any other unwanted side effects) in the subs? The main speakers are Klipsch Forte II's. Thanks in advance. Dave. 

dbrewer12345

Showing 3 responses by koestner

koestner
683 posts
 

Excellent choice. That has a lot of adjustments.

koestner
683 posts
 

when you use a splitter, that will be paralleled, so if the sub has a 10k input impedance your preamp will see about 9k Ohms overall. A huge difference from the 100k it saw before the sub was hooked up. The highs could be affected.

koestner
683 posts
 

Or get a buffer stage (tube, or SS) to put between your preamp and sub because your sub probably won't have high enough input impedance to use a splitter. I believe the highs will be affected.

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