I need help

[AsianPerzuasion]

Car: 2004 Mazda 6 Stock alternator

MY CURRENT SETUP

Headunit: KD-A735BT it has 3 Pre-Output Terminals being 4.8V Line )

Front speaker: JBL GTO608C 6-1/2" 2-Way Grand Touring Component Speakers (140 watts per set/70 watts each side RMS) 2 ohms Impedance

Rear speaker: JBL GTO938 coaxial (200 watts per set/100 watts each RMS) 2 ohms Impedance

Amp: Pioneer GM-D8604 4 channel

|4 ohms: 100 watts x 4 chan|

|2 ohms: 150 watts x 4 chan|

Pioneer GM-D8604 600W RMS Class D 4-Channel Car Amplifier

So I'm using 340 RMS to power 4 of my speakers on one amp.

Question:

1. I'm adding subs to my current setup but I don't want to change my alternator because of too much power strains.

2. I mostly listen to Rock, Electronic, and RnB so is sealed subs my best option? I'm not really looking for something to wake up the neighbors and I'm not an audiophile so really I just need something good for an average listener xD. I do like bass though lol

3. I guess I'm going to install another amp into my car so any recommendations? I'm looking at the Pioneer GM-D8601 Class D Mono Amplifier.

4. I'm hoping to get an amp and sub for under $300-350 and all the items needs to be from Amazon. Doesn't matter if its single or double subs.

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