Hi I had a quote done today and was told that I will need a second AMP for this setup. Just want to know if I am getting ripped off. So my AMP details are at the bottom.

DECK - KWX R810 - Double DIN

FRONT SPKRS - JL TR 650CSI Component

BACK SPKRS - JL TR 400CXI

SUB - SBRS83V - Max RMS Power Capacity: 300W
Peak Power Capacity: 900W


My AMP's details are

Class AB 4-Channel Amplifier
Absolute Symmetry Class AB Circuit
Differential, Noise Cancelling Input Topology: RCA jack inputs(low-level) and multi-pin jack(high-level)
On-board crossover: State-variable, 12dB/octave Butterworth with continuously variable cutoff frequency selection from 50-200 Hz. Configurable as Low-Pass or High-Pass
Preamp Output: Pass-through type
CEA-2006 Compliant
RMS Power Rating (14.4V):

4 ohms: 70 watts x 4 chan.
2 ohms: 110 watts x 4 chan.
Bridged (4 ohms): 220 watts x 2 chan.
Bridged (8 ohms): 140 watts x 2 chan.

RMS Power Rating (12.5V):

4 ohms: 45 watts x 4 chan.
2 ohms: 75 watts x 4 chan.
Bridged (4 ohms): 150 watts x 2 chan.
Bridged (8 ohms): 90 watts x 2 chan.

Frequency Response: 10 - 25kHz
Damping Factor: >200 @ 4 Ohms / 50Hz, >100 at 2 Ohms/50Hz
S/N Ratio: >104 dB referred to rated power(A-weighted, 20Hz-20kHz noise bandwidth)
Input Range: 200mV - 8V RMS
Bass EQ: +6dB Fixed Frequency, Fixed 'Q' with port for optional remote bass control
Slew Rate: +- 22V/us

Thank you for the help.

 

well yes you do. you have 4 channels , good for your 2 fronts and 2 rears. You need a sub amp. The only alternative is to just use the amp for the 2 fronts, run the rears off the head unit, and bridge the 2 extra channels of the amp to run the sub. Doable but not optimal. you have invested lots already. get a sub amp

 

Ok thank you, and yes that makes sense. I prefer a JL audio amp, what would you recommend for this sub?

 

When it comes to amps it's more about the rms power rating than the brand.. with speakers different brands use different materials/etc = different sound but 300w RMS from a decent amp is 300w for the most part. i would just look for the closest match to 300w at whatever impedance (4 or 2ohm) your sub (8" alpine right?) is, and find a good deal locally. Car Audio shops often have many specials at any given time.