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· Registered
7 Posts
Discussion Starter · #1 ·
About me: This will be my 3rd system and my first self install. I've been researching this for like 25+ hours now and this is what I have come up with. All of the "discontinued" parts I already have in hand. Looking to build this in the next 30 days. I'm really trying to figure out if all this is a "good setup" and all my RMS watts are correct for the speakers/woofers I've chosen. I'm trying to plan it all in advance so I do it right the first time!! I will be updating with pictures and all that fun stuff too. Thank you guys in advance!!


2012 Hyundai Elantra
90 Amp. Alternator (Stock)
550 CCA Battery (Stock)

Engine Bay:

Kicker Big 3 Upgrade Combo Package (1/0 AWG Hyper-flex Cable)


Front Doors-
Polk Audio db6501
6-1/2" 2-way Component Car Speakers
RMS: 200 watts per set / 100 watts each side
4 ohm Impedance

Back Doors-
Infinity Kappa 63.9i
6-1/2" 3-way Coaxial Car Speakers
RMS: 150 watts per pair / 75 watts each
2 ohms impedance
However, the link below says that they have "True 4 Ohm Technology".

Door Speaker Amplifier-
Alpine MRP-F450
4-channel car amplifier
CEA-2006 compliant
70 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
200 watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode)
8-gauge power and ground leads

Two Audiobahn AW1500Q 15" High-Excursion
Sealed Box
RMS: 800 watts each
Dual Voice Coil
Impedance (Per Voice Coil) 4 ohms

I am going to wire the subwoofers from 4 Ohms to 1 Ohm load at the amp according to this diagram.

I previously had these subwoofers hooked up to this amp... and they sounded amazing!!!!!!!!!!

Performance Teknique ICBM-DIGITAL
2000W Max, Class D Monoblock Amplifier

RMS Power Rating:
4 ohms: 350 watts x 1 chan.
2 ohms: 700 watts x 1 chan.
1 ohm: 900 watts x 1 chan

So assuming it was wired at 1 Ohm, each sub was seeing around 450w RMS.
With that in mind I am considering getting the following amplifier.

Subwoofer Amplifier-
Hifonics Brutus BRZ1700.1D
1700W RMS Brutus Series 1-Channel Monoblock Super Class D Amplifier

RMS Power Rating (@ 14.4V):
4 ohms: 600 watts x 1 chan.
2 ohms: 1200 watts x 1 chan.
1 ohm: 1700 watts x 1 chan.

With this amplifier each sub will see 850w RMS.

Subwoofer Amplifier Wiring-
Kicker PKD1
Dual 1/0 Gauge Power Amplifier Installation Kit

Signal Processor-
Rockford Fosgate 3Sixty.1

Note to self:
Manual Correction
Power Supply: The early printings of the 3Sixty.1 manual instruct you to connect the 12 volt power to a switched power source.
This is not correct and can cause an audible pop when the unit is turned off.
12 volt power should be connected to a constant power source.

1) Will the Inifnity 63.9i speakers run at 2 or 4 Ohms? Is there some mathmatical equation to figure this out? How much watts will they see from the MRP-F450 amplifier?

2)If they run at 2 Ohms is 100W RMS "safe" for them?

3)How do I get the Hifonics Amp to receive 14 volts?
Do I have to add a second 14v battery or can I just put a 14v power cell under the hood?
Is there any way I can know how many watts it will produce at 12v?

4)What other amps should I consider? I'm not stuck on Hifonics by any means.

5)What battery upgrades should I consider? Previously I've used RED TOP's in my cars (I understand the difference between RED and YELLOW). I've considered a MechMen HO Alt but it's a little pricey for my stomach. But I am open to suggestion.

6)I was considering doing a custom rear deck of some kind and adding some Infinity Kappa 6x9's and run them off the MA Audio amp listed below. I'm afraid the subs might over power the 6.5's in the doors. Is this a valid worry?? Is it even a good idea?? lol

7)Am I missing anything else??

Other Equipment I Have On Hand:

MA Audio M700XE (2-Channel)

Alpine MRD-M1005

JL Audio 13w7 D1.5
Custom JL Spec Ported Box

· Registered
7 Posts
Discussion Starter · #3 ·
LOL after all that typing and researching on my end. I get the question I knew everyone would be wondering.

Answer: I personally dont like it that much. I had it powered by that Alpine MRD-M1005 amplifier and it doesn't impress me as much as these 15's do. After all my newly acquired knowledge on car audio.. I suppose it would operate a lot better on the JL 1000/1 amp since it runs 1000 watts at 3 Ohms. From my personal experience these 15's hit like champions and the JL doesn't compare.

If everyone agrees that the JL will hit harder on a different amp I will consider adding it instead of the 15's. I am very open to constructive criticism. I suppose I just have very fond memories of the 15's lol.

What do you think?

· Registered
5,759 Posts
Well I won't knock those 15's (no pun intended), just curious. Right now my main concern is the charging system keeping up. You are putting together a rather high volume system, and it definitely will take some electrical power to keep it going at peak performance.
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