Andy GSi
Member
Registered: 24th Mar 02
Location: Shropshire, Drives 2.0l 16v Corsa
User status: Offline
|
i dont understand all the spec much, dont make sense to me
i want to know whether this JL amp is any good for powering 2 12"JL's
JLE6450
Rated Power (stereo):
45W RMS x 6 @ 4 ohm (12.5V);
75W RMS x 6 @ 2 ohm (12.5V)
Rated Power (bridged):
90W RMS x 3 @ 8 ohm (12.5V);
150W RMS x 3 @ 4 ohm (12.5V)
THD at Rated Power:
<0.08% @ 4 ohm (20 Hz - 20 kHz)
S/N Ratio:
>104 dB referred to rated power (A-weighted, 20 Hz – 20 kHz noise bandwidth)
Frequency Response:
10 Hz – 25 kHz (+0, -1dB)
Damping Factor:
>200 @ 4 ohm per ch. / 50 Hz,
>100 @ 2 ohm per ch. / 50 Hz
Slew Rate:
± 22V/µs
Input Range:
200mV – 8V RMS
cheers!
[Edited on 10-10-2003 by andysri]
|
DIGGIDY
Member
Registered: 15th Apr 03
Location: Bristol
User status: Offline
|
It's a 6 channel amp, which are normally used for multimedia installs...
Definatly !!NOT!! suitible for running 2 12" JL's 
Get a dedicated Class D mono amp capable of running a min sustained 2 ohm load... that will sort you out. 
|
Andy GSi
Member
Registered: 24th Mar 02
Location: Shropshire, Drives 2.0l 16v Corsa
User status: Offline
|
ok what abt this amp??
Rated Power: 250 W RMS @ 1.5 ohm-4 ohm (11V-14.5V)
THD at Rated Power: <0.05% @ 4 ohm
S/N Ratio*: >95dB below rated power
Frequency Response: 5 Hz - 500 Hz (+0, -1dB)
Damping Factor: >500 @ 4 ohm/50 Hz
Input Range: switchable from 200mV-2V RMS to 800mV-8V RMS
Dimensions: 10.25"L x 9.25"W x 2.36"H
Differential-Balanced Input Topology: (1 pair of inputs)
On-board Crossover: fully-variable (40-200 Hz), selectable-slope LP (12 or 24 dB per octave)
Preamp Output: 2-channel (full-range, LP or HP)
Bass EQ: variable boost up to 15dB
Infrasonic Filter: defeatable 24dB/octave at 30 Hz
Signal-Sensing Turn-On ermits operation without remote lead
Dual mono speaker output connections:accept up to 8ga. wire
+12V and Ground connections:accept up to 4ga. Wire
|
Richie
Member
Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
|
No that amp is not powerful enough to run both subs
|
DIGGIDY
Member
Registered: 15th Apr 03
Location: Bristol
User status: Offline
|
Now were starting to get somewhere...
Would help if i knew what the spec of the sub are... you need to match the sub RMS rating with the amp RMS rating(ohm dependant)
Nice to your looking at quality amps though.... this is good..
|
Andy GSi
Member
Registered: 24th Mar 02
Location: Shropshire, Drives 2.0l 16v Corsa
User status: Offline
|
this is the sub: JL-12W3V2D2
Nominal Diameter: 12 inches (300 mm)
Continuous Power Handling: 300 Watts
Voice Coil: 2.25" diameter, 4-layer, Kapton former
Configuration: Dual 2 ohm
Xmax (one-way, linear): 0.46"-0.51" (11.7-13.0 mm) depending on specific model
Sealed Enclosure Range: 1.00-1.50 cu.ft. (28.3-42.0 liters)
Ported Enclosure Range: 2.00-3.00 cu.ft. (57.0-85.0 liters)
VRC™ Technology: YES
Elevated Frame Technology: YES
can u find the right amp which would power 2 of these????
|
DIGGIDY
Member
Registered: 15th Apr 03
Location: Bristol
User status: Offline
|
Your looking at a serious Amp here...
your looking at an amp capable of pushing out 1200 watts RMS @ 2 ohms..
seeing that the subs are Dual 2 ohm coils depending how you configur them, you can take these down to 0.5 ohms !!! silly figures which my brain wont cope with at this time of day... don't quote me on these but we could be talking somewhere in the region of 2400 watts RMS... or more...
Yur best bet is look for a mono class D amp capable of 1200 watts RMS @ 2 ohms
don't think JL produce anything that size, not that i know of...
JBL do one which is rated at 1200 RMS @ 2 ohms... it's a BD, DB, BP..... just a sec....
JBL PowerValve BP-1200.1, very good quality amp will do the buissness...
best person(s) to ask would be snowy or corb... but don't let them bully you into over spending...
|
Richie
Member
Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
|
Why on earth would you want 1200WRMS when both subs together are only 600WRMS?
[Edited on 10-10-2003 by AustinPXX]
|
stubbsy
Member
Registered: 5th Jun 01
Location: stoke-on-trent
User status: Offline
|
cuz there dual voice coil 
|
NeilsC
Member
Registered: 6th Dec 00
Location: Middlesex drivin a Puma Racing on FRS 18's
User status: Offline
|
whats the peak on the subs as well ?
|
DIGGIDY
Member
Registered: 15th Apr 03
Location: Bristol
User status: Offline
|
That would be 600 RMS @ 4 ohms!!
although JL do not give the exact WRMS rating @ ohms... the standard usumtion ids that that rating will be given at 4 ohms.
These sub are dual voice coils and their 2 ohms voice coils not the normal 4 ohm coils as with most dual coil subs, which will lower the resistance and thus produce a high WRMS rating.. effectively your increasing the WRMS when you lower the resistance...
|
TOMAS
Member
Registered: 7th Aug 02
Location: Nottinghamshire
User status: Offline
|
Diggdy I think you are muddled mate, the subs want a COMBINED RMS of 600w @ 2ohms, or each wants 300w @ 4ohms. Each is dual 2ohm so can be wired to 4 or 1 ohms, so the pair can be wired to 8ohms, 2ohms or 0.5ohms either way they want 600wrms at any of the chosen ohms, 2ohms being the sensible choice.
Easy, Alpine m1000 - £400. it will push out approx 1000w at 2ohms. Its perfect for those subs as a little too much power is not a bad thing. Dont believe the scare stories about Alpine amps, they are VERY good, especially for the money and the in-built features are great! Honestly, even though im biased the Alpine amp is perfect for this app and for £400 you'll be having a hard job finding one that will beat it! Anyone care to disagree...  :lol
[Edited on 10-10-2003 by TOMAS]
|
DIGGIDY
Member
Registered: 15th Apr 03
Location: Bristol
User status: Offline
|
Peak rating are usless... you can't really measure a peak rating with any consistancy... peak rating usaly implies what the sub can handle for a short period of time... Like DB drag events where you play at stupid levels for a minute or two...
Completely usless for everyday use where a consistant level will be maintained for long periods... Thats why we have the RMS rating...
if stated correctly the RMS rating should allow continuos play for an indefinate amount of time.
|
DIGGIDY
Member
Registered: 15th Apr 03
Location: Bristol
User status: Offline
|
Here you go guy's listen to TOMAS he know more about this marlarky than i do.. so if i'm wrong about anything here i'm sure he will clear things up..
|
TOMAS
Member
Registered: 7th Aug 02
Location: Nottinghamshire
User status: Offline
|
LOL
|
SteveW
Member
Registered: 15th Jul 02
Location: Up in the clouds
User status: Offline
|
As always TOMAS saves the day
I would say to go for the DLS 600.1 (i think thats the model number) Is 600RMS into a 2ohm load
Not too expencive either
|
SteveW
Member
Registered: 15th Jul 02
Location: Up in the clouds
User status: Offline
|
heres what i would say 
DLS CA10
700RMS into a 2ohm
£499.99
Lightning Audio
Model: LIG-X1.1000.1D
700RMS into a 2ohm
£479.99
These are from www.caraudiodirect.com
SteveO
|
Richie
Member
Registered: 3rd Dec 02
Location: Newport, Wales
User status: Offline
|
Why not get the Vibe VP4 that puts 750RMS into 2 ohm, and yes its proven
Amps r gurd subs are shaaat
|
Andy GSi
Member
Registered: 24th Mar 02
Location: Shropshire, Drives 2.0l 16v Corsa
User status: Offline
|
so the DLS is 700RMS into a 2ohm =£499
and
the Alpine is 1000w at 2ohms = £400
but arent DLS a shit hot make???
which one whold u lot choose?? i would go for alpine, BUT loads of ppl have told me to stay away from them!!
oh cheers TOMAS, SNOWY and DIGGIDY for the info, helped alot
|
TOMAS
Member
Registered: 7th Aug 02
Location: Nottinghamshire
User status: Offline
|
I honestly cant see the problem with Alpine amps, ive been using Alpine amps for 3 years now, never had any problem with any of their range. I dont think they have a reliability issue. I think because they are so good value people are saying something must be wrong? So people say they dont put out their claimed wattages, EVEN if this is correct (lets say the M1000 puts out a genuine 800w and not 1000) its still plenty enough power for these subs. Couple that with a brilliant after-sales service (if needed) and I still dont think you'll beat the Alpine.
|
CopyWrite
Member
Registered: 16th Apr 02
Location: South Walez
User status: Offline
|
yeah alpine amps r awsome, id take up thomas's suggestion.
|
