Now Hiring - Installers, Detailers and Window Tinters. Learn More

Stores open in WA, OR, CO and TX Find Your Store

All About Alpine
Transform your driving experience with huge savings on all Alpine receivers, speakers, subwoofers, and bass packages!

BOOK A FREE CONSULTATION

Want to know if a product is compatible with your car? We’ll tell you for free!

4-Channel Amps

Hear the music the way it was meant to be heard by adding or upgrading your 4 Channel amp. Our product experts and professional installers have the experience to get you the sound you deserve.
Showing 16 of 16 items
Show: 
20 Items
Sort by:
Featured
Alpine S2-A36F S-Series Hi-Res 4-Channel Amplifier
Hi Res Audio
Alpine S2-A36F S-Series Hi-Res 4-Channel Amplifier
Alpine
S2A36F
(1 Review)
item
Free 2 day shipping
In Stock
$249.99
Free 2 day shipping
Find a store
Hide Details
Show Details
Alpine
S2A36F
(1 Review)
Alpine S2-A36F S-Series Hi Res 4-Channel Amplifier Product Overview Entry-level sound just got elevated with...
JL Audio XDM400/4 4-Channel Car/Marine Amplifier - 400 Watts
JL Audio XDM400/4 4-Channel Car/Marine Amplifier - 400 Watts
JL AUDIO
XDM4004
(0 Reviews)
  • 100W x 4 @ 2 ohms / 75W x 4 @ 4 ohms - 14.4V
  • Designed for Car or Boat Installations
  • Built with Marine-Grade Materials
Free 2-6 day shipping
In Stock
$649.99
Free 2-6 day shipping
Find a store
Hide Details
Show Details
JL AUDIO
XDM4004
(0 Reviews)
JL Audio XDM400/4 4-Channel Car/Marine Amplifier - 400 Watts The ultra-compact XDM400/4 packs a serious...
Alpine KTP-445U 4-Channel Power Pack Amplifier
Alpine KTP-445U 4-Channel Power Pack Amplifier
Alpine
KTP445U
(0 Reviews)
  • 45 Watts x 4 @ 4Ω/2Ω
  • 90 Watts x 2 @ 4Ω Bridged
  • For aftermarket and factory installed systems
  • Compact size
Free 2 day shipping
In Stock
$289.99
Free 2 day shipping
Find a store
Hide Details
Show Details
Alpine
KTP445U
(0 Reviews)
Alpine KTP-445U 4-Channel Power Pack Amplifier Add higher output and more dynamic response with this...
MTX Mobile THUNDER75.4 400W RMS 4-Channel Thunder Series Amplifier
MTX Mobile THUNDER75.4 400W RMS 4-Channel Thunder Series Amplifier
MTX
THUND754
(0 Reviews)
  • 75w x 4 @ 4Ω, 100w x 4 @ 2Ω
  • Compact design with small footprint
  • Variable HPF and LPF with 12db/oct x-overs
Free 2 day shipping
Available for Shipping Only
$219.99
Free 2 day shipping
Find a store
Hide Details
Show Details
MTX
THUND754
(0 Reviews)
MTX THUNDER75-4 400-Watt RMS 4-Channel Class A/B Amplifier MTX THUNDER..A name synonymous with car audio...
Sony XM-S400D 4-Channel Class D Amplifier
Sony XM-S400D 4-Channel Class D Amplifier
Sony
XMS400D
(0 Reviews)
  • 45 Watt x 4 Class D Amplifier
  • High/Low Level Input
  • Small Footprint Design
Free 2 day shipping
Available for shipping only
$149.99
Free 2 day shipping
Hide Details
Show Details
Sony
XMS400D
(0 Reviews)
Sony XM-S400D 4-Channel Class D Amplifier Power up your in-car sound with the XM-S400D stereo...
JL Audio JD400/4 Top Angle
JL Audio JD400/4 400 Watt 4-Channel Full-Range Class D Amplifier
JL AUDIO
JD4004
(0 Reviews)
  • At 4 Ohms: 75 Watts RMS x 4 @ 14.4 V
  • At 2 Ohms: 100 Watts RMS x 4 @ 14.4 V
  • Bridged At 4 Ohms: 200 Watts RMS x 2 @ 14.4 V
Free 2-6 day shipping
Out of Stock
$279.99
Free 2-6 day shipping
Find a store
Hide Details
Show Details
JL AUDIO
JD4004
(0 Reviews)
JL Audio JD400/4 400 Watt 4-Channel Full-Range Class D Amplifier Utilizing our exclusive NexD™ high-speed...
Diamond Audio MICRO84U 4-Channel Full Range Class D Powersports Amplifier, 600 W
Diamond Audio MICRO84U 4-Channel Full Range Class D Powersports Amplifier, 600 W
Diamond Audio Technology
MICRO84U
(0 Reviews)
  • 165 Watts x 4 @ 2 Ohms | 90 Watts x 4 @ 4 Ohms
  • 330 Watts x 2 @ 4 Ohms Bridged RMS Power
  • All-Weather Application
Out of Stock
$649.99
Find a store
Hide Details
Show Details
Diamond Audio Technology
MICRO84U
(0 Reviews)
Diamond Audio MICRO84U 4-Channel Class D Amplifier Developed and engineered from the ground up, these...
Alpine HDA-F60 Status Hi-Res 4-Channel Amplifier
Alpine HDA-F60 Status Hi-Res 4-Channel Amplifier
Alpine
HDAF60
(0 Reviews)
  • 100 Watts x 4 @ 4Ω
  • 150 Watts x 4 @ 2Ω
  • Hi-Res Audio Playback (192kHz/24Bit)
Out of Stock
$850.00$799.99
Find a store
Hide Details
Show Details
Alpine
HDAF60
(0 Reviews)
Alpine HDA-F60 Status Hi-Res 4-Channel Amplifier With the highest quality music streaming available on the...
JL Audio HD600/4 4-Channel Full-Range Class D Amplifier
JL Audio HD600/4 4-Channel Full-Range Class D Amplifier
JL AUDIO
HD6004
(0 Reviews)
  • 2" Tall Chassis
  • 4 Channels at 150 Watts RMS
  • Variable High and Low-Pass Filter
Out of Stock
$1,099.99
Find a store
Hide Details
Show Details
JL AUDIO
HD6004
(0 Reviews)
JL Audio HD600/4 4-Channel Full-Range Class D Amplifier Overview 4-Channel Class D Full-Range Amplifier, 150...
Alpine X-A70F 4/3/2 Channel Power Density Amplifier
Alpine X-A70F 4/3/2 Channel Power Density Amplifier
Alpine
XA70F
(0 Reviews)
  • Class-D Performance
  • Rotatable Illuminated Alpine Badge
  • Top-Side Control Panel
  • Remote Bass (RUX-KNOB.2) Compatible
Out of Stock
$799.99
Find a store
Hide Details
Show Details
Alpine
XA70F
(0 Reviews)
Alpine X-A70F 4/3/2 Channel Power Density Amplifier Revolutionizing How Your Music FeelsHear and feel the...
Kenwood eXcelon X302-4 600W Class-D 4-Channel Car Audio Amplifier w/ Bass Boost
Kenwood eXcelon X302-4 600W Class-D 4-Channel Car Audio Amplifier w/ Bass Boost
Kenwood
X3024
(0 Reviews)
  • 4-channel Class D car amplifier
    • 50 watts RMS x 4 at 4 ohms (75 watts RMS x 4 at 2 ohms)
    • 150 watts RMS x 2 bridged at 4 ohms (4-ohm stable when bridged)
  • variable high- and low-pass filters (50-200 Hz, 12 dB/octave)
  • variable bass boost on B channels (0-18 dB at 40 Hz)
  • preamp and speaker-level inputs
Out of Stock
$199.99
Find a store
Hide Details
Show Details
Kenwood
X3024
(0 Reviews)
Kenwood eXcelon X302-4 4-Channel Amplifier 4-channel Class D car amplifier 50 watts RMS x 4...
Alpine S-A32F S Series 4 Channel Car Audio Amplifier, 80 Watts RMS x 4, 2 Ohms
Alpine S-A32F S Series 4 Channel Car Audio Amplifier, 80 Watts RMS x 4, 2 Ohms
Alpine
SA32F
(0 Reviews)
  • Alpine’s Class D Amplifier Circuit
  • CTA-2006-B Power Rating: 55W RMS x 4 (4ohm, 14.4V ≤ 1% THD+N); 80W RMS x 4 (2ohm, 14.4V≤ 1% THD+N)
  • Bridged: 160W RMS x 2 (4ohm, 14.4V ≤ 1% THD+N)
  • S/N ratio: >83dB (ref: 1W into 4 ohm), >98dB (ref: rated power into 4 ohm)
  • THD+N ≤ 0.03% (ref 1W info 4 ohm)
  • Frequency Response: 10Hz-30kHz (+/-3 dB)
  • Damping Factor: > 100
Out of Stock
$219.99$123.96
Find a store
Hide Details
Show Details
Alpine
SA32F
(0 Reviews)
Alpine S-A32F S-Series 4-Channel Amplifier S-Series amplifiers are your sound system’s workhorse. With unmatched reliability...
Alpine KTA-450 Power Pack Amplifier Compact Car Amp, Fits Behind iLX-W650 Stereo
Alpine KTA-450 Power Pack Amplifier Compact Car Amp, Fits Behind iLX-W650 Stereo
Alpine
KTA450
(0 Reviews)
  • Compact size, measuring just 7” W x 3.5” H x 1.25” D
  • Class D amplifier circuit
  • Dynamic Peak Power (DPP) technology doubles the power during dynamic musical passages
  • The KTA-450 used with the iLX-W650 is a 2019 CES Innovation Awards Winner
Out of Stock
$219.99
Find a store
Hide Details
Show Details
Alpine
KTA450
(0 Reviews)
Alpine KTA-450 4-Channel Power Pack Amplifier with PowerStack Capability The next generation of Power Pack...
AudioControl ACX-650.5 All Weather 5-Channel Amplifier, for Boat/UTV/Motorcycle
AudioControl ACX-650.5 All Weather 5-Channel Amplifier, for Boat/UTV/Motorcycle
AudioControl
ACX6505
(0 Reviews)
  • 4 x 50 Watts @ 4 Ohms, 1 x 200 Watts @ 4 Ohms
  • 4 x 75 Watts @ 2 Ohms, 1 x 350 Watts @ 2 Ohms
  • IPX6 Rated
Out of Stock
$559.99
Find a store
Hide Details
Show Details
AudioControl
ACX6505
(0 Reviews)
Audio Control ACX-650.5 All Weather 5-Channel Amplifier AudioControl’s ACX-650.5 all-weather amplifier delivers honest power levels...