2. misc-audio
  3. 172428-41

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

Showing 4 responses by jmarshak

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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.

 

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jmarshak
157 posts
 

@ozzy - I cross over at 90 HZ with CR-1

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jmarshak
157 posts
 

hi @ozzy 

90Hz is what JL recommends.  Also, I tried several from 70hz to 110 and did not like other x-over frequencies any better. Regardless if it's 80 or 90,  I believe the most important part is to find the right phasing on each sub.  That's when the entire system just clicks-in! 

Best Regards

 

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jmarshak
157 posts
 

One thing that might be worth mentioning about the CR-1 are the ground lifting switches in the back.  Their position matters, especially when using RCA ICs.  Owner should definitely test if grounded or floating sounds best to them.

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