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JL Audio Ahead of the Curve

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  #11  
Old 08-26-2016, 07:39 PM
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I am seriously considering the DEQX HDP5 preamp/DAC/crossover/room correction unit. I have done quite a bit of research and it is a pretty impressive unit. The crossover is extremely sophisticated as is the room correction, but the real key is the time domain correction -critical to the proper integration of subs. It is very complicated, but I'm up for the challenge. The sound is supposedly excellent. I think it may be just what I'm looking for.
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  #12  
Old 08-26-2016, 07:49 PM
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Quote:
Originally Posted by jrsystems View Post
I am seriously considering the DEQX HDP5 preamp/DAC/crossover/room correction unit. I have done quite a bit of research and it is a pretty impressive unit. The crossover is extremely sophisticated as is the room correction, but the real key is the time domain correction -critical to the proper integration of subs. It is very complicated, but I'm up for the challenge. The sound is supposedly excellent. I think it may be just what I'm looking for.
My biggest issue is understanding the damping feature...
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  #13  
Old 08-26-2016, 10:03 PM
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Damping feature?
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Media Room: Raidho D1; JL fathom f113; B&W HTM2; B&W DM602S2; McIntosh C2200; MX134; MC501 (3); MC402; MS300; Oppo BDP-105; dbx 223xs; Thorens; Sonos Connect; Dell PC running Roon server; Harmonic Technology cables; Sony XBR70X850B
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  #14  
Old 08-26-2016, 11:04 PM
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Damping feature?
the CR-1 has a damping knob for high/low to help roll off the x-over. It may just be a fine tune but dunno.
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  #15  
Old 08-27-2016, 05:09 AM
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Ah yes, I think those are indeed a fine tuning control. It looks like they are used to smooth out the overlap where the mains and subs crossover. Interesting feature.
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Media Room: Raidho D1; JL fathom f113; B&W HTM2; B&W DM602S2; McIntosh C2200; MX134; MC501 (3); MC402; MS300; Oppo BDP-105; dbx 223xs; Thorens; Sonos Connect; Dell PC running Roon server; Harmonic Technology cables; Sony XBR70X850B
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  #16  
Old 01-20-2017, 11:56 AM
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Default cr-1 and two f-113 set up

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Originally Posted by minnie55 View Post
I did order the disc. Seems like master/master and eliminate the controls on the sub and just use the cr-1.


Where does one order the disc? Is it on the Soundoctor site?

Nvm. Found it on the site!
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Supporting System: McIntosh MX121 A/V Center; MC205 Amplifier; Bryston 14bSST2 Amplifier; PS Audio P10 Power Reconditioner; Revel Salon 2 Mains; Revel Voice 2 CC; JL Audio f113v2 (2); JL Audio CR-1 Crossover; Focal IC1002 Surrounds; Paradigm Studio Sub 15.
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Last edited by scirica; 01-20-2017 at 06:44 PM.
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  #17  
Old 01-21-2017, 10:49 PM
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Spent over two hours on the phone with Barry "The Sound Doctor"today. That man has an intense passion for audio engineering and I'm looking forward to the day he visits me in Dallas. Until then it will be heads down learning his technique and seeing how close I can get things on my own!
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Digital: SilenZio Gen 3 High Performance Media Server; Esoteric K-03X; Bryston BDA3.
Supporting System: McIntosh MX121 A/V Center; MC205 Amplifier; Bryston 14bSST2 Amplifier; PS Audio P10 Power Reconditioner; Revel Salon 2 Mains; Revel Voice 2 CC; JL Audio f113v2 (2); JL Audio CR-1 Crossover; Focal IC1002 Surrounds; Paradigm Studio Sub 15.
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  #18  
Old 04-18-2017, 09:49 PM
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Thread revival.

I set my single 113 up using my just acquired CR1. I followed Barry's instructions for the most part and achieved a satisfying integration. I did a few things differently in respect to his suggestions. For one, I used a meter to measure the null although it's not that hard to hear it. I found the meter allowed me to achieve greater precision. The null itself was textbook, over 40dB. The controls (phase and level) are hair trigger. Just a little bit wrong one way or the other and you miss the notch.

I also measured the system using the 18 tracks of tone he provides and charted them for my amusement. Here's what I found:

I have a dip (suck out) of about 20dB at 55Hz ( room related). It's quite narrow. I don't actually hear it, but it can be seen in the measurement. It affects the adjacent bands (50Hz and 60 Hz) which also scope a few extra dB down from ideal. Other than that, my system is flat plus or minus 2dB from 120 to 65 Hz (1/6th octave smoothed if I calculate by the provided tones) and plus or minus 3db (except for that suck out centered at 50 Hz) to 40Hz. After that, it rolls off a bit (actually looks like a shelf) and is down around 15 dB by 20Hz. It's interesting to me because it doesn't sound like it's rolled off nearly that much. I played a bit with the damping control for the woofer (I added 2dB) and oddly that seemed to move the whole shooting match up a couple of dB. I still have to fine tune the crossover frequencies to see what if anything might help since things are somewhat interactive, it seems. Of course, I can just add more gain at either the sub or via the "mix" control on the crossover as the bottom octave looks pretty much like a shelf. I'm reluctant to screw around too much because it sounds great, not lacking for bass to my taste.

The low octave measurements don't convey how tuneful and solid the low end is even with only one sub and somewhat less exciting measurements below 50Hz . The low end is really crisp, which I gather is the point. I have also gained a few dB of additional headroom on the high end, and you can hear the clarity and ease that relieving the main amp of low frequency duty has added. It's easy to see because of the meters on my Mc amp, which also come in handy for checking reference levels at 85 dB and then comparing them to the maximum levels on the disc. I am barely into the meat of the sub's amplifier, tons of headroom there.

It gets better. Imaging, which has always been good with the Salons, is even better now. A wonderful phantom center is even more evident. I used the pink noise track to confirm that, but it was always a strong point for this rig. By the way, I plugged the Salons' ports as suggested. That was an article of faith for me, but it works as advertised. I can see spending a lot of time futzing around with this thing!
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Last edited by Pampero; 04-21-2017 at 06:04 PM.
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  #19  
Old 04-19-2017, 05:20 PM
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Thanks for the detailed follow-up. I'm considering a JL and this is helpful.
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  #20  
Old 04-19-2017, 10:35 PM
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This reminded me that I was going to schedule Barry to come out at some point. I think rather than spend more on equipment, it's time to spend it on setup!
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Analog: VPI Aries 3D with Ortofon A95 cartridge; Ortofon ST-80SE Transformer; McIntosh C2500.
Digital: SilenZio Gen 3 High Performance Media Server; Esoteric K-03X; Bryston BDA3.
Supporting System: McIntosh MX121 A/V Center; MC205 Amplifier; Bryston 14bSST2 Amplifier; PS Audio P10 Power Reconditioner; Revel Salon 2 Mains; Revel Voice 2 CC; JL Audio f113v2 (2); JL Audio CR-1 Crossover; Focal IC1002 Surrounds; Paradigm Studio Sub 15.
Cabling: Wireworld Silver Eclipse XLR; Wireworld Silver Electra Power Cords; Wireworld Silver and Gold Eclipse RCA's, Audioquest Aspen Speaker Cables.
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