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Is there anyway to convert a JL Sub to connect to Main speakers?

I am thinking of going straight from a Lumin X1 Dac/Streamer etc. directly to my main mono block amps, thus eliminating a preamp. I was very impressed with the purity of the sound  from the Lumin when running direct like this. However, I would like to incorporate my subs.

I have been told by Lumin that using the line level outs (XLR) for the main amps and the (RCA) outs for my subs at the same time will result in not so good of sound. I tried it, and though it works, the sound is not as pure as just using the one set of outputs for my mains.

Lumin suggested using Rel subs connected to the speakers/amps using the high level speaker connection.
But, I already own 4 JL Audio F-113 subs that only accept line (low) level connections.

Question:
Is there some type of converter that can adapt a line level input  from the sub to connect to the high level speakers?
Sort of like converting my JL Subs to the Rel design.

ozzy
128x128ozzy

Showing 2 responses by mijostyn

mijostyn's avatar
mijostyn
8,175 posts
 
Ozzy, great subwoofers and 4 to boot. That is some serious low end potential.
The absolute best way to do this is to get a dedicated digital subwoofer crossover. You would take the digital output of your DAC and connect that to the digital input of the crossover which will work it's magic and give you analog outputs for satellite amps and subwoofer amps. The unit I like the best is the Behringer DCX 2496 https://www.parts-express.com/behringer-dcx2496-ultradrive-pro-digital-24-bit-96-khz-loudspeaker-man... Then there are the dbx units the 223xs and the Driverack PA2. The dbx units have analog inputs only. 
The Behringer will allow you to time and phase align the subs and it has a digital input (AES/EBU) 
JL Audio also makes a subwoofer crossover I believe it is entirely analog which is a serious weakness. Digital signal processing has far less distortion than analog. It also allows for signal delay which is how you align your system in time.
mijostyn's avatar
mijostyn
8,175 posts
 
Ozzy, Any detriment additional processing might do, particularly digital processing will be made up for 10 times by the decrease in distortion to the main speakers and improvement in integration that a dedicated crossover allows. If you come off your streamer with a digital output to the digital input of the crossover you remain in numbers where there is no distortion at all. You just do your conversion to analog after the crossover instead of after the streamer. The way you are headed is the worst way to go but it is inexpensive and we are all entitled to make our own mistakes.   
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