So where are all the JL peeps

[helotaxi 5,000+ posts]

There's really nothing special about the JL A/B amps. Most people run 4 ohm mids and highs anyway so the flexibility of the impedance optimization circuitry doesn't do anything for you. They are solid amps, but really nothing impressive. I think that the 450/4 is nice because of the staggered power but other than that...

Being able to run whatever impedance and getting full power makes the Class D amps much more of a significant item on the market. The flexibility that it offers is huge. 1kW is more than most people need and being able to have it available into a 4 ohm leaves the sub choice wide open.

 

[btdickey99 5,000+ posts]

There's really nothing special about the JL A/B amps. Most people run 4 ohm mids and highs anyway so the flexibility of the impedance optimization circuitry doesn't do anything for you. They are solid amps, but really nothing impressive. I think that the 450/4 is nice because of the staggered power but other than that...
Being able to run whatever impedance and getting full power makes the Class D amps much more of a significant item on the market. The flexibility that it offers is huge. 1kW is more than most people need and being able to have it available into a 4 ohm leaves the sub choice wide open.

very well put

 

[vehementSPL 10+ year member]

Actually with their higher end amps the nice thing I think isn't so much the sub choice. But for example say I have a amp that does a true 1000 watts rms at 2 ohms. I have it wired at 2 ohms. Most of the time due to imp rise I see between 2.5 to 4 ohms. Now think about this. so most of the time I am getting between 600 to 800 watts (approx). So if you wire the JL at 2 ohm you still see the full power the amp puts out at all times. I have heard the JL benches at around 1400rms. IF you wire it at 2 ohms that would be like having a 2000 watt amp that produces it at 2 ohms.

 

[SteveSkal]

For what I use it for JL is perfect. That 13W7 hits hard and is very clean, and really doesn't take up much room, I still have a ton of cargo space in the back of the Escalade. Its nice to have the simplicity of one well put together sub, as opposed to many lower quality subs.

 

[helotaxi 5,000+ posts]

Actually with their higher end amps the nice thing I think isn't so much the sub choice. But for example say I have a amp that does a true 1000 watts rms at 2 ohms. I have it wired at 2 ohms. Most of the time due to imp rise I see between 2.5 to 4 ohms. Now think about this. so most of the time I am getting between 600 to 800 watts (approx). So if you wire the JL at 2 ohm you still see the full power the amp puts out at all times. I have heard the JL benches at around 1400rms. IF you wire it at 2 ohms that would be like having a 2000 watt amp that produces it at 2 ohms.

That isn't how my understanding of the R.I.P.S. means it to work. You set the input sensitivity based on the nominal load but without the load connected. That means that it is set for the nominal load and adjusts the voltage rails to work with that nominal load. If it is set for 3 ohms and "sees" a 2 ohm load it will current limit and roll back the output, but it won't ramp up the power if it is wired to a higher load (or in the case of impedance rise or power compression). You wouldn't want it to either. The sub is usually most efficient where its impedance is highest. The increase in impedance reduces actual power applied to the sub at those frequencies and self equalizes. If the amp auto compensated for the variances in impedance across the range of the driver any sub that you hooked to it would sound like utter garbage.

 

[vehementSPL 10+ year member]

That isn't how my understanding of the R.I.P.S. means it to work. You set the input sensitivity based on the nominal load but without the load connected. That means that it is set for the nominal load and adjusts the voltage rails to work with that nominal load. If it is set for 3 ohms and "sees" a 2 ohm load it will current limit and roll back the output, but it won't ramp up the power if it is wired to a higher load (or in the case of impedance rise or power compression). You wouldn't want it to either. The sub is usually most efficient where its impedance is highest. The increase in impedance reduces actual power applied to the sub at those frequencies and self equalizes. If the amp auto compensated for the variances in impedance across the range of the driver any sub that you hooked to it would sound like utter garbage.

Guess so sorry

 

[helotaxi 5,000+ posts]

No need to apologize.

 

[Rannlod 10+ year member]

Never competed or put my system on a tl i just built mine for personal enjoyment

 

[SPL KID 10+ year member]

in the NSPL 6 Jl 12's on 3 MMATS D50HC put out 152.4 DB from the trunk of a nissan stanza in 2002 I beg to differ these aren't cabable of HIGH SPL numbers. Maybe no one has tryed to continue that legacy. If I had the CASH and space in a vehicle i'd run JL's in a SPL ride all day! People have just found cheaper more cost effeicient ways of reaching those higher #'s. This is from 2003 just switched amps:

Class Competitor Score Amp/Speakers

Trunk 0-250 Larry Dove 145.7 db MMATS/Massive

Trunk 251-500 Milton Wyche 148.5 db MMATS/Massive

Trunk 501-up Stephen Manes 152.5 db Crossfire/JL

THAT IS SICK in a 2002 Nissan Stanza!

 

[sdmtnbiker420 10+ year member]

THAT IS SICK in a 2002 Nissan Stanza!

The last Nissan Stanza was made in 1992.

There is no 2002 Stanza.

 

[RAM_Designs 5,000+ posts]

in the NSPL 6 Jl 12's on 3 MMATS D50HC put out 152.4 DB from the trunk of a nissan stanza in 2002 I beg to differ these aren't cabable of HIGH SPL numbers. Maybe no one has tryed to continue that legacy. If I had the CASH and space in a vehicle i'd run JL's in a SPL ride all day! People have just found cheaper more cost effeicient ways of reaching those higher #'s. This is from 2003 just switched amps:
Class Competitor Score Amp/Speakers

Trunk 0-250 Larry Dove 145.7 db MMATS/Massive

Trunk 251-500 Milton Wyche 148.5 db MMATS/Massive

Trunk 501-up Stephen Manes 152.5 db Crossfire/JL

THAT IS SICK in a 2002 Nissan Stanza!

Although the number is good, you have to realize that it's taking SIX 12" subwoofers to do that....serious competitiors hit 150 with a single 12 or 15 nowadays...sometimes even higher. Someone hit 180+ with a single 18" Z from DD earlier this year.

Point is, you can make almost anything(that's a decent product) loud. It's all in the install/car/power/song/tone.

 

[audiolife 5,000+ posts]

nate munson did a test (when he still competed) between a w7 and the top of the line DD sub at the time and the jl kept up with it pretty well. was within a db or so which isnt too bad for a SoundQuality sub.

 

[helotaxi 5,000+ posts]

They're capable of high output, but if that's what you're going for, why buy a driver built for accuracy that sacrifices peak motor strength for a flat BL curve and pay twice as much for something that you obviously don't really care about?

 

[audiolife 5,000+ posts]

jl w7 costs more than a dd 9500?

 

[RAM_Designs 5,000+ posts]

jl w7 costs more than a dd 9500?

at an authorized dealer for both subs....yes.