Can these x-overs be used on other spkrs?

well if they are designed for 4ohm..and you use 4ohm components..they will probably be pretty close to use..at least alot better then no x-over at all. It is a big longshot they will be perfect if used with another brand..but you asked if they potentailly could work and I would say yes, there is potential

true steven..but chances are those JL x-overs are simple 12db per octive..a cap and a coil..so only the cross over points will be different..but also why I state "potentially" will work...would need quite a bit more info before any accurate results could be posted. Now those particular x-overs are for a 4'' coax with seperate leads for the tweets..so if you use it with a larger speaker it most likely will not give has much low end response as the larger speaker can reproduce..but once again it is guess work at this point..we only have "potential".

Heres the specs i could find...

Technical Specification
Sensitivity: 85 dB
RMS Power Range : 40 Watts
Peak Power Handling: 80 Watts
Frequency response: 57-25000 Hz
Diameter: 4 Inch 
 
Features
4-inch (100 mm) Coaxial
0.75-inch (19 mm) Aluminum Dome Tweeter
Rec. Amp Power: 15 - 75 Watts
85.0 dB Efficiency @ 1W/1m
FR: 57 Hz - 25 KHz ± 3 dB 

I hear ya steve..and it makes sense to me as well, there are so many factors involved in addition such as placment, time alignment , phasing, acoustics, reflections etc..

But I am an experimenter so if I just had a set of x-overs laying aroung..and some components of a different model or brand lying around..I would have no fear of hooking it up just to see if it works.

But your statement would most likely be the reason it  wouldn't sound that great..but stranger things have happened.

Back in the day when I would build my own passives I would use the specs of the speakers to determine my points..I always used 12db except on subs i would go 6db with these ginormous inductors..they were like 100 bucks each and the ohms value of the sub(s) would help me determine the henries..as well as the crossover frequency I desired. in some instances I would use 18db for tweets..or build bandpasses for midbass..and that presents even more of a challenge..things on paper do not always do whats expected in a mobile environment for so many reasons... it would take experimenting with different values for the mids/highs/center ..as well as placment to find the "sweet" spot.

Has far as basic component sets..to me it's just plug and play.

Thanks for responding.

Technical Specification
Sensitivity: 85 dB
RMS Power Range : 40 Watts
Peak Power Handling: 80 Watts
Frequency response: 57-25000 Hz
Diameter: 4 Inch 
 
Features
4-inch (100 mm) Coaxial
0.75-inch (19 mm) Aluminum Dome Tweeter
Rec. Amp Power: 15 - 75 Watts
85.0 dB Efficiency @ 1W/1m
FR: 57 Hz - 25 KHz ± 3 dB 

Yes basicaly thats what I have found so far for specs.But that should be the sum total spec sheet for the speaker as a unit.What I asked JL for is the specific specs for the x-overs themselves.I like to tinker as well so always doing things like changing finals and drivers for CB's and trying gears on the chainsaw bike I built about 10 yrs ago.(long story)I know that for idealy passive x-overs are desighned for a specific speaker.Per speaker.But back when i messed with car audio(Pyle was top shelf back then)They made generic passive x-overs that were basicaly bandpass filters.These were mass produced and sold at like wal-mart.Todays market is more high tech and was hopein to not needlessly ruin these units experimenting.

I guess and hope that when i hook thses up they will basicaly/roughly filter out some of the highs and or bass.They are 2-way so should at least provide some seperation.They also have a REF.   /  -3db   for the tweet so if set to -3db they should at least filter well enuff to allow better seperation of highs from bass.I imagine that i'll have to use the high side of the head unit to use these things as there is no RCA jack indicating potential for low side useage.

If I get serious enuff I'll break out the ole winding jig I used to use to wind coild for antennas and build my own.LOL t

Thanx for the quick responce and hope to find more info as time goes on....Bill

The ref-3db should have nothing to do with the crossover point..but will attenuate the highs 3db in the event they are to loud or harsh.

But basically that is what a simple cross over like that should do..filter out highs to the bass speaker..and filter out lows to the tweeters..nothing else magical or high tech circuitry going on inside there except maybe a protection circuit..you will know when you encounter that because the tweets will attenuate by themselves or completly shut off until you lower the volume. If that happens lower the gains.

Good luck experimenting around..lets us know if you got them to sound decent.

oh..and as far as an amp...the crossover can not tell the difference if you are hooking it straight to the deck (which the speaker outputs are from an internal amp) or an external amp. You just connect the input wires to it and the output wires to the appropriate speaker. There are never RCA inputs or preamp inputs on a passive crossover of this type..they are all designed to go between the amp and speaker(s).Just don't exceed 40w rms..which will be a non issue if you are going straight to the deck power.Now although the wattage specs are probably for the speaker itself..crossovers can be damaged by too much power..I have blown a few myself. The specs state as little as 15watts for those.

Even without the specs for the crossover itself..it states the frequency response of the total set...so it is probably low passed around 57hz. You can not tell the high pass from those specs but it will be in the range for a tweeter.

Those "generic" crossovers you mention where probably not bandpass..the use for a passive bandpass crossover is not common enough to be on a walmart shelf....they were just a cap or coil...6db high or low pass.

have fun

Using a crossover not designed for a set or speakers will never result in the best sound for all the reasons Steven outlined.  NO off-the-shelf crossover will ever be optimized for a different set of speakers than the ones it was designed for.  But sure, go ahead and try them, you might be fine with the sound, and as long as the tweeter crossover is not too low you shouldn't blow your tweeters.

Actually the filters as i remember them were sold at rad shack not wally world(sorry brain fart)and they had caps(high filetrs)and coils/caps and i think resistors (low pass)and were marketted in kinda smokey/clear cases about 4inchs square on down .But this was about a decade ago and rad shack doesn't even carry the finals or drivers or decent microphones for citizens band anymore.Heck they barely carry anything for us 2 wire do it yerselfe then call the fire departmenters anymore.

And yea i know that they wouldn't be optimal but what the heck i'm not doing compitition anyways just tryin ta make noise and irritate the neighbors.LOL

sounds like it was a generic 2way crossover from the shack...probably not too different then the JL's you have now but those use caps/coils with values designed specifically four those 4'' JL's. if it incorporated any resistors those were most likely for the high pass.

yeah try em out...if you have a tin ear like me (well I play in a rock band as well so my hearing is shot..lol) they will probably serve thier purpose.

Actually got a reply from JL ain dat a kick in da head??LOL.

"the crossover you have is rated at 40watts, it’s a bandpass with the HP @ 7.5KHz (12dB/octave and, the LP @ 2.5KHz, (6dB/octave)"

I get this the crossover you have is rated at 40watts, it’s a bandpass with .       Tiis part refers to the tweet as in High Pass the HP @ 7.5KHz (12dB/octave and this part refers to Lo Pass , the LP @ 2.5KHz, (6dB/octave)
But the 7.5 and 2.5 unless i can see it on a chart comparein to what i already know (which is i admit minimal.is greek to me.Are those decent ratings?Doubt i'd wanna thro em on even a decent amp with 1/2 butt subs.But maybe on some 6"s and 4"s and horn tweets for some potentialy decent midrange maybe??

yeah, this x-over is not a bandpass..and 2.5khz for a low pass would sound like one ugly giant tweeter. Those specs really don't make sense at all as stated above..perhaps you spoke to the person at JL that dumps the garbage at night?  lol

Take care.