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

I have been curious whether the CR-1 reduces any transparency in the signal to the mains. 

peter_s

Yes that is also my concern since previously I was sending the signal direct from Lumin X1 directly to my amps thus bypassing a preamp and all the associated cabling.

Now with the CR-1 I have again additional electronics and cabling in the chain.

But, so far I am having a hard time determing if there is in fact a reduction in transparancy.

ozzy

jmarshak,

I am crossing over at 80Hz. But still experimenting. Why did you choose 90Hz.?

ozzy

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