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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

128x128ozzy
fiesta75
1,378 posts
 

I don't know anything about the JL CR-1, but I've been a big believer in using the low level inputs to all my subs. Exactly what you have described, more very deep bass. Some REL "experts" think using the high level inputs are better, so I just quit debating this. Enjoy!

oldhvymec
5,101 posts
 

When I looked at RELs design and read THEIR BS. I did the same. They are WAY behind in Bass tech. It is literally 70-80s tech. Bottom firing with NO butt plate (or slot loaded). There is NO way to decouple from the floor without adding a slot.. 

NONE of my buddies have used subs constructed like that in 30 years.... Nice paint though.. LOL REL owners like SPL, and FEELING the bass that's easy.. Buy exciters.. doing the same thing.. smearing the bass signal over evey surface in the room behind NOT decoupling.. They sound terrible to me, make my ears hurt..

I use to run JL W12s in my auto stuff in the 90s I think it was W12s Serious drivers..

Regards

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jmarshak
157 posts
 

The CR-1 has been a very impactful addition to my system for 2 years now. The main improvement was unexpected; the speaker's (high frequency and midrange) output became clearer. JL explained that it’s due to the speakers being alleviated from the lower frequency bass duty. The cross overs (on the subs) cannot do this. The CR-1 is excellent.

@ozzy - I can’t imagine using 4 of these JL F113 beasts. I have 2, my room is 18X20x9 and the bass is very palatable in the listening locations. The bass must be extremely uniform in your room. Best Regards.

 

ozzy's avatar
ozzy OP
7,493 posts
 

Thank you so much for the comments. I am really surprised in the difference between line level and speaker level low bass response.

jmarshak,

What crossover frequency are using with your JL subs and crossover?

ozzy

gita
38 posts
 

Congrats, ozzy! I dream of the CR-1.

I have a pair of JL Audio e110s connected like REL. Since I run an integrated that lacks the ability to "loop" the CR-1 into the system, it's going to stay a dream, at least for a while. 

Enjoy!

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