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Are these the Amps i need?????

1366 Views 26 Replies 5 Participants Last post by  Bex
Hope someone can help as i know just about nothing about ICE.

Want to run some components up front, some 6.5inch 2 ways at the rear and a small 8 inch sub in the boot.

The head unit is an Alpine CDA-9812RR

Right so I was going to use the head unit to run the rear 2 way speakers.

A Polk MOMO C300 amp to run the front components:

Power
Channels 2/1 (bridgeable)
Total Dynamic Power (all ch. driven) 850 watts
14.4 Volts RMS Not Bridged @ 1kHz
4 Ohms 150 watts x 2
2 Ohms 220 watts x 2
14.4 Volts RMS Bridged
4 Ohms 450 watts x 1

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Electrical
Signal-to-noise (Referenced to rated power) > 105 dBA
Remote Gain 0 to -30dB
Input Impedance > 10k Ohms
Output Impedance < 0.02 Ohms
Overall Frequency Response (-3 dB Points) 10Hz - 45kHz
Protection circuitry Power and ground reversal, Thermal and Short, Current Overdraw and Low Impedance Protection with auto stand-by mode

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Dimensions
Overall Dimensions (with panels) 2-1/2" H x 13" W x 9-3/4" D
(6.35cm H x 33.02cm W x 24.77cm D)
Product Weight 12.00 lbs.
Total Shipping Weight 13.50 lbs.

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Filter Settings
Subsonic Filter 24dB/oct @15Hz
High Pass Filter frequency 50Hz - 250Hz
High Pass Filter slope 18dB/octave
Low Pass Filter frequency 50Hz - 250Hz
Low Pass Filter slope 18dB/octave

A Polk MOMO C500 amp to run the sub

Power
Channels 1 MonoBlock
Total Dynamic Power (all ch. driven) 975 watts
14.4 Volts RMS Not Bridged @ 1kHz
4 Ohms 350 watts x 1
2 Ohms 500 watts x 1

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Electrical
Signal-to-noise (Referenced to rated power) > 105 dBA
Remote Gain 0 to -30dB
Input Impedance > 10k Ohms
Output Impedance < 0.02 Ohms
Overall Frequency Response (-3 dB Points) < 10Hz to 200Hz
Protection circuitry Power and ground reversal, Thermal and Short, Current Overdraw and Low Impedance Protection with auto stand-by mode

--------------------------------------------------------------------------------

Dimensions
Overall Dimensions (with panels) 2-1/2" H x 11" W x 9-3/4" D
(6.35cm H x 27.94cm W x 24.77cm D)
Product Weight 10.00 lbs.
Total Shipping Weight 12.00 lbs.

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Filter Settings
Subsonic Filter 24dB/Octave @ 15Hz
Low Pass Filter frequency 30Hz to 200Hz
Low Pass Filter slope 12 or 24dB/Octave

Is that all I need????

I was going to uprate the std Mitsi battery to something a little more powerfull.

Any help would be much appreciated before I go and buy this little lot!

I have asked similar questions before but this time it is defo getting bought so thought I would make sure i have it all right.

Thanks

Matt
:)
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1 - 6 of 27 Posts
Sry for the delay in reply! Been a tad pre-occupied!

Head unit – fine gd choice – it has a gd clean sonic signature and a decent pre amp stage.

Rear speakers – DON’T INSTALL THEM! – Various reasons why:

- they pull your stage height down – when listening to car audio it should sound as though the instruments and singers are placed approx 3” above your dash board – because the speaker location in evos are pants to start of with you’d have to install your mids in the doors and tweeters on the a pillar – approx 4” from the bottom – facing out towards the bonnet slightly. When you install rear speakers it pulls the stage further back from the dash more towards the centre concel.
- They create a muddiness to your tonal accuracy – you will finds this mainly on male vocals.

Amp for the speakers – seems fine – I cant seem to find the current draw figures on it – very important to see this – this is what determines how much current the amplifier needs to deliver the power that the manufacture states: ie if the amp runs 1000w rms @ 1 ohm it mush use 60 amp for example – if you can only deliver 50 amps into the amp you will only get a ratio of the current with the ohmage.

Amp for the sub seams dandy too.

Sub – is far too small for an evo – although you say you only require a small amount of bass – by the time you get the 8” woofer to perform it will be distorting – mainly because ef the distance it has to travel. You would be much better off with either a 10” or my suggestion a 12”. – weight wise I very much doubt you’ll tell the difference in the car!

Only thing left that you missed is dynomat – a necessity in Evos – the door panels are very poor for letting sound out – you must deaden the panel to allow a better transfer.

And when setting the car up – I’d suggest to run the drivers side mid out of phase – it will focus your centre stage a lot better.

If you need more info give me a shout : Manjit : 0191 2612445
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yes I'm in the iCE trade - I own a company(been in the trade over 15 years) that mainly installs car audio products for IASCA use (International Auto Sound Challenge Association).

Now I mainly PR, write review and talk a load of shite! lol
Sheffield use Source sounds - Ask for Paul Ellis - tell him I sent you.

Or Music World - Ask for Steve the sheep shagger - Tell him I sent you!

Derby - no idea

Notts - No idea

Newcastle upon Tyne! ME!!!
[email protected]: Source Sounds and Security - Thorncliffe Industrial Estate - Chapeltown - Sheffield - S35 2PH - 0114 257 1550

Steves I have at work - I'll post it around lunch time tomorrow.
for what your looking at i'd say £100 is cheap, £200 is reasonable - but i can give you some pointers re what to look for! and £300 is expensive.

for £100 id say it would be an almost chuck in job.

£200 - all the cables should be tied into the origional harness on the runners, power cable should be grommited front and rear, power cable should be correctly fused. Tweeters should be mounted correctly according to IASCA ruling. All gains setup without clip.

£300 - same as above but fancier!!
the c400.4 would give you better performance compared to the c500 and the c300 - its not all about power-you have to take the efficency of the electrical systme into account.

The choice is: standered battery: c400

Uprated battery front and split charge rear : c500 and c300

The c500 will draw around 70amps @ 2 ohm bridged and the c300 will draw approx 83apms ...

The C400 driven at 2 x 75w fronts and 1 x 200w rear will draw 68 amps ... more efficient - AND taking into account that you only have a 90amp altenator I'd say this was the better route to take.
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