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
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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!

 

ozzy's avatar
ozzy OP
7,426 posts
 

I was referring to the inputs into the CR-1. Using all XLR instead of mixing XLR/RCA inputs should eliminate the hum some were having.

To me, if you can run all XLR to the sub, I would use that instead of RCA. Perhaps when using the XLR outs it provides a db boost over the RCA connection.

I am using JL F-113 subs which can contour the bass to the room.

I hope this info helps.

ozzy

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natev305
8 posts
 

Under Scenario 3 - how could you use two sets of XLR when there is only ONE XLR input set for the "Main Stereo Inputs" on the CR-1.....? hence the confusion.

 

ozzy's avatar
ozzy OP
7,426 posts
 

I see that I did confuse you. Sorry. I was referring to the managed inputs for adding a Home Theater connection along with 2 channel. So, let’s see if I can correct it / or confuse more?

The managed bass inputs come from my Home Theater equipment (Oppo 205). For that input, I am using the balanced inputs. If you use the RCA input and then use the balanced outputs, then, you could get hum.

So, if all you have is RCA from your Home Theater equipment to go into the managed input on the CR-1 then use an RCA- XLR adapter and plug it into the balanced input if you are using the balanced outputs.

Better to use all XLR or all RCA connections into the CR-1

ozzy

 

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natev305
8 posts
 

ozzy thank you for clarifying - now I'm with you. Will try both and see - order the same adapters you had mentioned and an additional xlr for the F112 - appreciate the quick reply - and yes, Randy is a gem over at JL....I've enjoyed all my conversations with him getting the CR-1 set-up and my 7 yr old F112 updated/renewed. great company. 

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