2. tech-talk
  3. 1378038978

Summing up L & R line-level for dual subs

I have dual subs and I'm taking the line-level signal out of my Lamm LL2 (pre) second set of L & R outputs. I'm setting up the subs following Earl Geddes approach to multiple subs setup, that calls for the summed-up mono signal played by all subs, and each sub set up to play a different range.

I've seen Y-type connectors suggested as a way to sum-up L & R. Would that work?

Thank you!
lewinskih01
kr4's avatar
kr4
3,707 posts
 
Probably too well. Combining the L/R out of the Lamm will probably sum the output to the main amp/speakers. Result: No stereo.

If your subs have L/R inputs, you should connect to them independently and let each sub do the summing. Otherwise, you need an isolated or buffered Y connection.
csontos
1,311 posts
 
Why would you not want your subs to be in stereo as extensions of L/R main speakers?
jjrenman
279 posts
 
If the second set of outputs on the Lamm LL2 are buffered than you can use a Y cord. If not you will have to add a small buffer stage.

You could always try a Y cord (as it will not hurt anything) and if the main system ends up in mono you will know that the Lamm does not have separate buffered outputs.
More to discover