View Full Version : Biamping JBL L112 and/or L150

06-07-2015, 04:18 PM

This is my first post here after around 1 year of hard searching and research.
I am interested in Biamping my system, but I have minimal knowledge on electronic crossovers, networks and the specifics on how to modify a speaker.

My current gear/Set-up
Preamp: Pioneer SX-1980
Power Amp: McIntosh MC275 (mkvi)
Speaker: JBL L112 (soon to be L150's)

I am aware that using the 1980 as a preamp only is a waste and the 112's and the 150's like a bit of power that the 1980 could offer. That's where I would like to have it power the LF. I love my MC275 and would like to include it in the set-up for the mids and highs.

My WAF is strained and if she worked out that only the 1980 could take care of the speakers than I would have to pack the MC275 away. So Biamping has two appeals
1). The sound and dynamics.
2). Continuing to display both of my babies instead of 1.

My questions is more around confirmation that my below thinking is correct.

1). Install a 2nd set of binding post in speaker and attach LF directly to the posts (not soldered just clipped so I can reverse).
2). Purchase 2 way electronic crossover (brand??).
3). Run 1980 preamp into crossover and than crossover into 1980 for LF and MC275 for Mid/High.
4). Set crossover points to ?? for LF and ?? for rest.
5). Run the MC275 into original binding post and let passive take care of the rest.
6). Tweak gain/controls until happy with sound.

I am aware that I am still using the internal passive but I am happy with a simple solution that gives me good overall sound with minimal altering.
Should the be any risk or concerns I need to be aware of? I am willing to purchase a $5 speaker to modify first if I need to learn how to modify and tweak the crossovers?

Sorry for the long post and thanks for reading.



06-07-2015, 07:35 PM
Not sure you'll gain anything by it but I can suggest the Ashly XR1001 and cross it at 1100-Hz, just like JBL did for the L150A (1000 Hz for the L150). You won't need to modify the crossover, just disconnect the woofer from the network and run it direct to your LF amp.

06-08-2015, 12:16 AM
Thanks for the advice. If I get no benefits other than having both units working and no sound degradation thats a win. If it improves the sound even in a small way, well thats win win. and I can keep telling my wife that both are a requirement for music listening.



06-11-2015, 07:07 AM
The L112 is a 3way speaker. You would need to tri amp them .

06-11-2015, 07:37 AM
If you change the "would need to" to "could", I'd agree.

FWIW, I got the best sound from my L112 pair adding a sub under each one...
perhaps it was because I could then turn down the bass :)

Disclosure: I do not fall in the bass-volume-fiend end of the listening preference spectrum.

06-11-2015, 04:39 PM
The L112 is a 3way speaker. You would need to tri amp them .
Not if you use the passive network for the top two drivers. Re-read the goal he's trying to achieve.

06-11-2015, 09:05 PM
Turning down the mid and high gains would be a good start. The next would be to add a dcx2496 into the chain .