JL Audio Amps
 

Hey everyone!..new here but been roaming the boards for awhile and appreciate all the shared knowledge, now I have a question.

I have a JL Audio e6450 six-channel amp hooked up to a 12" sub, honestly I'm looking for more power as I'm constanty upping the bass power, so I'm looking to get a new JL Audio amp but not sure how to compare so was curious if any of you out there have any experiences to share..I would consider other amp brands but my neighbor has some solid connections and also I heard JL Audio amps were one of the best. Thanks in advance!

Why don't you try bridging two of the channels on the amp for more power before you go changing the amp? Are you running a 2-ohm sub? JL amps are superb. Plus the other 4 channels would be great for running the rest of your system.

I would read this thread:

http://forums.bimmerforums.com/forum...d.php?t=501411

I'd really like to hear what the system comprises and such (box type, woofer, etc) before making any recommendations.

well for my setup im thinking of: jl audio 500/1 amp + 2 12" jl audio w3v2 subs...hopefully i can find a shop with good prices to customize the subs in the spare wheel space

Good. Fast. Cheap. Pick any two.

has anyone here customized subs into their spare tire space? just talked with a shop and they said they could only barely squeeze in one of the W3 subs that i have...if only 1 sub i was thinking of getting a JL Audio W6 sub but they said that will not fit

Off topic?

I found JL audio to be an ok brand for the name droppers. Is your sub a -/2ohm stable driver with a large magnet? Or is it just a 4ohm stable with a medium magnet? What happens when you up the bass power? I.e......lights dim or just a general not happy with the thump?

Dimming lights can be fixed with a couple of capacitors or just running a dual battery. Draw backs to this being the space needed to install the components.

I was always a fan of MTX and Kicker. I would suggest them if your looking for bridged power that can be reliable. I run McIntosh amps now.....a bit on the steep if youre not a big audiophile.

Nice name drop. :)

I would discourage anyone from considering current MTX or Kicker amps.
Good alternatives for amps are DLS, Arc, Elemental/Avionnix, and even Directed Audio. Kicker is NOt what they were, and MTX has issues too.

I would also suggest that magnet size is in and of itself irrelevant. Backplate travel is different.

ARC, MTX, Kicker all suffered from the same "clipping" issues related to a few bad runs. IMHO, and thats purely me, believe that they are pound for pound worth the money. I 've been running setups like this in DB drags for a few years without issues.

Magnet size does matter when considering Q and effeciency of the box setups. Read this:
Q Q is the formula for what happens electrically and physically at resonant frequency. Q is related to how slowly a natural vibration dies down. Q is a neat term that combines many elements of speaker design, so it's an important term to speaker designers.
Q is important to the woofer because in a speaker system where the Q is too high, you'll get a whomp in the bass. If a speaker system's Q is too low, then the bass output is relatively weak, because frequency response is highly damped in that region.
The best Q for a speaker to have is one that gives flat response down to the resonant frequency.
If you do nothing to a speaker but make the cabinet smaller, you increase stiffness and therefore Q goes up. But Q is not a word for stiffness alone. It's a ration involving mass, stiffness, and resistance (or damping). Designers often juggle these three factors. Good bass is not enough. Good bass with uniform frequency response and spherical wave-form is the goal. Obtaining that goal without too much sacrifice in efficiency is the challenge.
EFFICIENCY AND MAGNETIC FORCE
In a dynamic speaker, the voice coil and the magnet structure interact to force the speaker to move. Send an electric current through a coil in or near a magnet and a force is produced. The force results in an alternating movement or motion which is converted to variations in air pressure by a cone. The pressure is radiated as a sound wave.
The stronger the magnetic field, the higher the force, the higher the efficiency. Bigger magnets often lead to stronger magnetic fields, but not always, because the strength is related, not only to magnet size, but also to the size and shape of the gap that the voice coil moves in.To get a more efficient speaker of the same size, you can use a stronger magnetic field. However, this gives you lower Q. You'll get more output at the middle frequencies, but less at the high and low ends. This can give relatively less bass even though you now have higher efficiency. Therefore, if you increase magnetic field, you have to go back and redesign the tuned port of the cabinet to get back to correct response.


you can go to directed acousitcs for more info on this at http://www.directacoustics.com

Adding jl amp to factory amp
 

help!!!!
I have a 2004 X5 with standard radio no nav. After reading the "How to add a subwoofer amp to the X5 factory audio", I decided to add a JL audio
250/1 amp and a 10w3v2d4 sub to boost the low bass. I follow the setup procedure from JL audo: configure the sub coils in parallel to achieve 2ohms and adjust the amp to 22.4 volt ac. After doing all that, I can not hear any difference. When I play with the input sensitivity, I have huge bass but the sound is awful. Can somebody tell me what I am doing wrong?

Yes, you are spam-posting. Stop posting the same question all over the place :)