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Old 06-07-2019, 06:52 PM
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Default How Should I Be Using the 'LP Filter' Switch on a JL Audio Sub?

I've read the instructions in the manual for my JL Audio subwoofer but I'm not sure I understand how I should be using the switch labeled 'LP Filter.' I'm using the sub for my two channel system (not a home theater setup) and I don't know which position this switch should be set to. I have a single RCA plug running from the back of the sub to the sub input of my integrated amp.

Thanks for any help you can give me.
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Old 06-07-2019, 07:03 PM
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Default How Should I Be Using the 'LP Filter' Switch on a JL Audio Sub?

It depends on which model you have but I THINK, assuming your home theater processor is handling all the bass management crossover settings, you would set that to off.

https://jlaudio.zendesk.com/hc/en-us...bile_site=true
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Old 06-07-2019, 07:09 PM
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Originally Posted by crwilli View Post
It depends on which model you have but I THINK, assuming your home theater processor is handling all the bass management crossover settings, you would set that to off.

https://jlaudio.zendesk.com/hc/en-us...bile_site=true
I guess I should have been more clear. This has nothing to do with my home theater setup; that's in another room. The sub is only for my dedicated two channel system.
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Old 06-07-2019, 07:37 PM
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Default How Should I Be Using the 'LP Filter' Switch on a JL Audio Sub?

If there is no bass management before it, then set it to ON and then set the crossover point at 40 and tweak from there. Set its level down and ELF to 0. I assume you have no measurements of your room so are flying blind.

- Optimize your room for your main speakers.

- Ask yourself what do you feel is missing?

- I suggest you start with a low crossover point (~40 Hz)at low volume.
—— Bring sub volume up slowly while listening to a bass heavy test track. Ballad of a Runaway Horse is a good one! Once you hear the sub, now begin turning it’s volume down balanced against the crossover point or HP Filter level.

—- Run DARO

—— don’t forget to adjust the phase on the sub (assuming you have a Fathom).

You do not want to be able to locate your sub. It should be ‘invisible’ when you close your eyes. You should ‘feel’ it filling in only those frequencies below which your mains can handle.

Lastly, consider pursuing the free (except for a USB microphone) route of using REW and measuring your room.

So this is what I would do in your situation. It may or may not be what others would do!
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Main room - Sonus Faber Stradivari, JL Audio F113v2 & CR-1 Crossover, McIntosh MC2301 Amplifiers with Stillpoint Ultra SS feet, McIntosh C1100 on Stillpoint Minis, Esoteric K-03X on Stillpoint Minis, Cybershaft Ultimate 2 OP17 on Stillpoint Minis, SilenZio v.2 Audio by -E- Media Server (running ROON), GigaFoil v4, Keces P3 with Ghent PC, 9 M Supra Cat 8+ and 0.65 M Revelation audio ethernet cables.

Other - 2 Stillpoint Apertures, GIK Bass Traps, Vicoustics Waveguide panels, Shunyata Alpha Clock 75 1.5 meter BNC, Shunyata Alpha 1.5 meter USB, WW Gold Eclipse 7 SCs, WW Silver Electra 7 PCs, WW Silver Eclipse ICs; 3 X 20 Amp Power lines, PS Audio P10 & Dectet, 3 Sound Anchor stands, Powerports and numerous Noise Harvesters. Furutech Flex 50, Cable risers, HRS dampeners

TV Room Audio - Panasonic TC-P60GT50, McIntosh MX-121, MC7106, Revel F52 & C32, B&W LM1, Sonos Connect\W4S Remedy\iFI 9V Power, WW & Kimber cables, PS Audio Dectet
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Old 06-07-2019, 07:52 PM
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Quote:
Originally Posted by Route 66 View Post
I've read the instructions in the manual for my JL Audio subwoofer but I'm not sure I understand how I should be using the switch labeled 'LP Filter.' I'm using the sub for my two channel system (not a home theater setup) and I don't know which position this switch should be set to. I have a single RCA plug running from the back of the sub to the sub input of my integrated amp.

Thanks for any help you can give me.
Looks like you've been given good advice about the settings in post #4, but I want to ensure that you have the RCA cable connected to the sub's input from the SUB OUT connection of your integrated amp.
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  #6  
Old 06-07-2019, 08:18 PM
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Quote:
Originally Posted by crwilli View Post
If there is no bass management before it, then set it to ON and then set the crossover point at 40 and tweak from there. Set its level down and ELF to 0. I assume you have no measurements of your room so are flying blind.

- Optimize your room for your main speakers.

- Ask yourself what do you feel is missing?

- I suggest you start with a low crossover point (~40 Hz)at low volume.
—— Bring sub volume up slowly while listening to a bass heavy test track. Ballad of a Runaway Horse is a good one! Once you hear the sub, now begin turning it’s volume down balanced against the crossover point or HP Filter level.

—- Run DARO

—— don’t forget to adjust the phase on the sub (assuming you have a Fathom).

You do not want to be able to locate your sub. It should be ‘invisible’ when you close your eyes. You should ‘feel’ it filling in only those frequencies below which your mains can handle.

Lastly, consider pursuing the free (except for a USB microphone) route of using REW and measuring your room.

So this is what I would do in your situation. It may or may not be what others would do!
Thank You, you've given me a lot of good info to work with and I really appreciate it!
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  #7  
Old 06-07-2019, 08:20 PM
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Originally Posted by audio bill View Post
Looks like you've been given good advice about the settings in post #4, but I want to ensure that you have the RCA cable connected to the sub's input from the SUB OUT connection of your integrated amp.
Yes, that's exactly how I have to sub connected to my amp.
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