[cvsnowboarder]

Hi, I have my Jehnerts LP at 200 hz on my JL Audio xd600/6v2... I've heard of people on this forum band passing them from 80 hz to 200 hz . How is this done ? My Jl audio xd600/1v2 is LP at 50 hz powering a 10" Kicker Comp RT subwoofer.

Can you give me the name of the band pass crossover that I should buy as well please?

[bmw325i]

Originally Posted by cvsnowboarder

Hi, I have my Jehnerts LP at 200 hz on my JL Audio xd600/6v2... I've heard of people on this forum band passing them from 80 hz to 200 hz . How is this done ? My Jl audio xd600/1v2 is LP at 50 hz powering a 10" Kicker Comp RT subwoofer.

Can you give me the name of the band pass crossover that I should buy as well please?

I have my subs playing 55 down jehnerts playing 55-150 and morels playing 150 up. Ideally you would use an aftermarket dsp. I have an aftermarket headunit that has most of the basic features of a dsp. Another option if you are on a budget is to use an fmod for either the high pass or low pass.
http://www.amazon.com/s/ref=nb_sb_no...-keywords=fmod

[kaigoss69]

Originally Posted by cvsnowboarder

Hi, I have my Jehnerts LP at 200 hz on my JL Audio xd600/6v2... I've heard of people on this forum band passing them from 80 hz to 200 hz . How is this done ? My Jl audio xd600/1v2 is LP at 50 hz powering a 10" Kicker Comp RT subwoofer.

Can you give me the name of the band pass crossover that I should buy as well please?

I told you about the F mods before. But I guess you want to have second and third opinions. In the end you're going to come back to the F mods.

[cvsnowboarder]

How do I install the mods? Which ones do I buy? Thanks

[Stream]

Originally Posted by kaigoss69

I told you about the F mods before. But I guess you want to have second and third opinions. In the end you're going to come back to the F mods.

Kaigoss, can you explain how F-mods works? I have read that they are passive, so I can imagine that F-mod adapter has internal 1st order HFP and 1st order LPF, built with compact components. And we all know, that compact inductor, for example has high resistance and it's not good.

[kaigoss69]

Originally Posted by cvsnowboarder

How do I install the mods? Which ones do I buy? Thanks

Jehnert used to recommend an 80Hz high-pass not sure if they still do or not. Also don't know what slope. From what I have read, they are happy playing down to ~50Hz. Fmods are 12dB/oct so if you picked 80Hz, it would be down roughly 10 dB at 50Hz. 12dB down at 40Hz and 24dB down at 20Hz. I think that would be "safe". Keep in mind, the Jehnerts only have 1" voice coils and therefore cannot handle much power in the subwoofer frequency range, and need to be protected by a high pass filter.

[kaigoss69]

Originally Posted by Stream

Kaigoss, can you explain how F-mods works? I have read that they are passive, so I can imagine that F-mod adapter has internal 1st order HFP and 1st order LPF, built with compact components. And we all know, that compact inductor, for example has high resistance and it's not good.

Just go on their website for more info. I'm not an electrical engineer. They work...

[cvsnowboarder]

Can anyone recommend the exact Fmod that I should buy please?

[cdgatti]

for the jehnerts, if you use the fmods to high pass and your amp to low pass, you would probably go with either the 50 or 70 hz high pass units. they make something called the fmod cable which will do either 50 or 70 depending on orientation, you could experiment that way.

[kaigoss69]

Originally Posted by cdgatti

for the jehnerts, if you use the fmods to high pass and your amp to low pass, you would probably go with either the 50 or 70 hz high pass units. they make something called the fmod cable which will do either 50 or 70 depending on orientation, you could experiment that way.

Agreed, the cable seems to be the best choice, although it is not clear what the slope is.

OP, don't let us recommend the crossover setting, ask the vendor you bought them from, or the manufacturer.

[6spdcoupe]

Originally Posted by kaigoss69

OP, don't let us recommend the crossover setting, ask the vendor you bought them from, or the manufacturer.

Agreed. Lot's of questions in various threads, have you not tried asking your vendor ? Whoever that might be ..

[taibanl]

Originally Posted by 6spdcoupe

Agreed. Lot's of questions in various threads, have you not tried asking your vendor ? Whoever that might be ..

Speaking of vendors...wanna sell me some morels?

[cvsnowboarder]

I wish I could ask my vendor, but I bought the Jehnerts used. So they didn't come with any documentation or manual. So I thought I'd ask the experienced members of this here forum for advice. Particularly the Jehnert vendors on this forum since I assumed they'd have first hand knowledge on band passing/ crossover points etc. I guess I'll try to contact Jehnert directly .

[6spdcoupe]

Originally Posted by taibanl

Speaking of vendors...wanna sell me some morels?

I'm sure I can if that is what you really want. It's been so long since I actually sold a set of those !

[6spdcoupe]

Originally Posted by cvsnowboarder

I wish I could ask my vendor, but I bought the Jehnerts used. So they didn't come with any documentation or manual. So I thought I'd ask the experienced members of this here forum for advice. Particularly the Jehnert vendors on this forum since I assumed they'd have first hand knowledge on band passing/ crossover points etc. I guess I'll try to contact Jehnert directly .

So you don't support the vendors but rather go elsewhere and then you want the vendors to support you and your questions ? When they don't this is wrong to you ? Please explain.

[cvsnowboarder]

I totally support the vendors , but when I had the chance to get the Jehnerts used for 150 bucks I'm all over it. Nobody passes up a good deal.... nobody. Just sayin'.

[taibanl]

Originally Posted by 6spdcoupe

I'm sure I can if that is what you really want. It's been so long since I actually sold a set of those !

Ken seems to love them, you and Eric not so much. Why the disconnect?

[6spdcoupe]

Originally Posted by taibanl

Ken seems to love them, you and Eric not so much. Why the disconnect?

Nothing against them, we just have preferences of other things as well as the cost difference. The performance is really purely subjective though too.

[sparkymarky]

i have bandpassed my underseats by using the lp on my amp and then feeding that low passed 180hz signal into an audiocontrol 2xs (the rarer version with a 24db slope) electronic crossover which i highpassed at 70hz - (ebay for £80). Works great, really removed the muddiness of underseats trying to play frequencies they couldn't handle. small, quick and simple to install too.