White Smoke

I am looking to get an amp for an S2000. I found a sweet deal on a JL Audio 450/4 and it's seems to be exactly what I need. I can tell you the amp is going to cost me less then 200 delivered to my door which I believe is a very good deal.



http://www.onlinecarstereo.com...16955

Features:

o R.I.P.S. (Regulated Intelligent Power Supply)
o Absolute Symmetry Class A/B Circuit
o RealSink (Heat-Management System)
o Differential-Balanced Input Topology (2 Pairs of Inputs)
o Channel 1 & 2 Crossover : Fully-Variable (50~5Hz), selectable slope (12dB or 24dB/octave) LP, BP or HP
o Channel 3 & 4 Crossover : Fully-Variable (50~5Hz), selectable slope (12dB or 24dB/octave) HP
o Preamp Output : 2-Channel (pass through)
o Bass EQ : +6dB (variable boost up to +15dB and Remote Bass Option)
o Infrasonic Filter (Channels 1 & 2 only) : defeatable 24dB / octave @ 30Hz
o All Speaker Output Connection : accepts up to 8AWG wire
o +12V and Ground Connections : accepts up to 4AWG wire

* SPECIFICATIONS
o Rated Power Channels 1 & 2 (Stereo Mode) : 150 Watts RMS x 2 @ 1.5-Ohms~4-Ohms (11~14.5V)
o Rated Power Channels 1 & 2 (Bridged Mode) : 300 Watts RMS x 1 @ 3-Ohms~8-Ohms (11~14.5V)
o Rated Power Channels 3 & 4 (Stereo Mode) : 75 Watts RMS x 2 @ 1.5-Ohms~4-Ohms (11~14.5V)
o Rated Power Channels 3 & 4 (Bridged Mode) : 150 Watts RMS x 1 @ 3-Ohms~8-Ohms (11~14.5V)
o THD at Rated Power (All Channels) : <0.03% @ 4-Ohms
o S/N Ratio (All Channels) : >108.5 dB below rated power (A-weighted, 20Hz~20kHz noise bandwidth)
o Frequency Response (All Channels) : 5Hz~30kHz (+0, -1dB)
o Damping Factor (All Channels) : >200 @ 4-Ohms / 50 Hz
o Slew Rate (All Channels) : +/-25 V / uS @ 4-Ohms per channel
o Left to Right Channel Separation : >75dB @ 1kHz
o Input Range : Switchable from 200mV~2V RMS to 800mV~8V RMS
o Dimensions (LxWxH): 19.7" x 9.25" x 2.36"
o Approximate Weight : 18.6 LBS
o Warranty Information : 1 Year Millionbuy Warranty

My question is about the rating of the amp, is it 150 Watts RMS x 2 @ 4ohms and 75 Watts RMS x 2 @ 4ohms or what? The description is not very clear to me. Also if anyone has experience with this amp, or line of amps any input you have would be appreciated.

B18C_EJ8

JL's site confirms those specs.

http://mobile.jlaudio.com/prod...d=438

Kindof strange though. I've never seen an amp rated that way. :shrugs:

incubus

its called staggered power, thats how you can tell JL knows what they are doing. They are designing the amp for people who know car audio. You always want more power on your fronts than your rears (if u even run rears at all) if u want to run the amp in 3 ch mode, the 3&4 channels become your mid (front) section and the 1&2 channels becomes your sub channel.
For $200 take it and run. Its an $800 amp.
I would like to see more power for an S2000 tho, u have to remember ur gonna lose a lot of that power with the top down.
Im assuming ur going to use it in 3 ch mode?

incubus

oh and the JL stealth box (10w3) would work great with the 450/4.

junkspeedproject

holy shizzz thats one helluva deal!!!!!!!!!!!!!!!!!!!!!!

yes youre correct that 1 and 2 channels are 150 watts rms each and channels 3 and 4 are 75 watts rms each.

id love to have a 450/4 and 1000/1 mounted right next to each other. but for now, i shall settle with a 500/1 and 300/4



you wont be disappointed with that amp.