I have two mono class d amps, one is a 2500 watt boss amp with these specs:
MAX POWER, 1 OHM 2500w x 1
MAX POWER, 2 OHM 1800w x 1
RMS POWER, 4 OHM 750w x 1
MAX BRIDGED POWER, 4 OHM n/a
SIGNAL-TO-NOISE RATIO > 100 dB
THD 0.01%
DIMENSIONS:11-13/16”W X 2-7/16 ”H X


REMOTE SUBWOOFER LEVEL CONTROL
LOW LEVEL INPUTS • LINE OUTPUTS
VARIABLE GAIN CONTROL
INPUT SENSITIVITY SELECTOR
VARIABLE LOWPASS CROSSOVER
STRAPPING CAPABILITY:
STRAP TWO AMPS TOGETHER FOR TWICE THE POWER
VARIABLE SUBSONIC FILTER
PHASE SHIFT SELECTOR
POWER AND PROTECTION LEDS
0-+18dB VARIABLE BASS BOOST



the second amp is a 3500 watt class D boss amp with these specs:

MAX POWER, 1 OHM 3500w x 1
MAX POWER, 2 OHM 2200x x 1
RMS POWER, 4 OHM 1200w x 1
MAX BRIDGED POWER, 4 OHM n/a
SIGNAL-TO-NOISE RATIO > 100dB
THD 0.01%
DIMENSIONS:11-13/16”W X 2-7/16 ”H X

and the subwoofers they have are both the same being that they are the following:

Model


LAC128D

Power Peak 1600W
RMS 800w
Cone Material NON-PRESSED PAPER
Magnet Structure 200oz
Voice Coil Size & Type 3”
Efficiency 1 Watt/1 Meter 96dB
Frequency Response 25Hz-2.2kHz
Impedance dual 4 ohm
Mounting Depth 6-9/16”


I have each amp hooked to a 5k capacitor and my head unit is a Jensen dvd player with 7" touch screen. the output from the subs are not loud at all is there something i am doing wrong?