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JL Audio CR-1 Crossover

So, I own 4 JL Audio F-113 subs. Each of these were bought used and all have been updated at JL Audio.

I have been very happy using them in my system. The main speakers are Focal Sopra 2’s. I am using a Iso-Max Jensen transformer(s) model #SP-2SX to connect the subs to my mains and it seems to work pretty well. BTW, the Iso Max unit(s) convert speaker level to balanced (similar to the Rel subs) using Speak-On fittings.

The JL Audio solution to the high/low band pass issue was their CR-1 Electronic crossover. I always wanted to try one of these but at $3000 list I didn’t think it could improve that much over my Iso Max unit(s).

However, I was able to find a used JL Audio CR-1 electronic crossover and I have just now connected it up.

The first thing I noticed was how much very low bass I was missing. Example: Linda Ronstadt “Blue Bayou” the bass now digs into the subterranean.

I guess I need to play with it a while. but I was wonderin’ if anyone else who owns or has owned this unit can share any set ups tips and general opinions of the unit.

ozzy

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tom2015
95 posts
 

Interesting Topic.

 

Currently I use speaker terminal to sub high level input. (Morrow)

Switched over to using the second XLR output on the preamp to connect to the low pass filter on the sub instead. (MIT Termintor cable).

Volume for both connections is different, but I don’t hear low bass information that is missing via the high level inputs. 
 

possibly the CR1 makes the difference.

 

delm
54 posts
 

For those that want to populate a supplied board to build a crossover there is

https://diyaudiostore.com/products/diy-biamp-6-24-crossover

hubbman's avatar
hubbman
25 posts
 

Hello Northman,

just coming back to this thread now and noticed your comment on the buzzing issue while using both balanced and unbalanced connections. Did the JL guys help you find a solution?  I’m still dealing with this buzz when I use the HT bypass switch.

 

thanks!

ozzy's avatar
ozzy OP
7,461 posts
 

Just add a XLR to RCA adapter to the RCA cables that are plugged into the CR-1.  That way only the XLR inputs on the CR-1 are being used.

ozzy

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natev305
8 posts
 

ozzy - here is my setup and is "Scenario 3" in the CR-1 manual 

 

CXN v2 streamer via XLR to CR-1

Marantz 1711 F/R and Sub via RCA to CR-1 

Mcintosh MA7900 integrated via RCA from the CR-1 

JL Audio F112 sub via RCA from CR-1

 

If what I have read from all the above is true - and I am getting very boomy overly boosted bass from the sub only using the XLR streamer, should I try running via XLR (in lieu of exisitng RCA) from the CR-1 output to the Sub? Is this what you refer to when you say the CR-1 doesnt like XLR and RCA ?

thank you!

 

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