4-Channel Amplifiers (156)

Soundstream BXT4.2000 Bass Xtreme Series 4Ch Amplifier + Absolute KIT8 8 Gauge Amp Kit Quality sound processing is necessary for those who want the most out of their car audio system. Bass Xtreme amplifiers offer similar sound processing options by including the functions of a Bass Reconstruction Processor. Bass Processor boosts lower frequency harmonics that have been compressed or removed from today’s music recordings and are commonly added in-line before subwoofer amplifiers. Dial in the exact sound you want by tuning the frequency to boost, then increase the bandwidth range from that frequency to stimulate the harmonics around it. After slight adjustments, your audio system can sound like audio professionals have tuned it. Unlock and restore the bass from any system with Bass Xtreme Amplifiers. General Features: Bass Xtreme Series 4-Channel Class A/B Car Amplifier Selectable 6db or 12db 50hz bass boost MOSFET Power Supply w/ Audiophile Grade IRTM Transistors Military Grade SMT PCB Maintains Dynamic Performance Direct Short, Thermal, & Overload Circuits Protect Amplifier 200mV-6V High Level or Low-Level RCA Input & Output Variable 12dB Low Pass Crossover Blocks High Frequencies 50-250hz Variable 12dB High Pass Crossover 120-3khz Max Power: 2000 Watts RMS Power @ 4Ω: 110W x 4 RMS Power @ 2Ω: 175W x 4 RMS Bridged @ 4Ω: 350W x 2 Remote Gain Control: N/A Low Pass Filter: N/A (F) / 50Hz-250Hz (R) High Pass Filter: 120Hz-3KHz (F) / 120Hz-3KHz (R) Bass Boost: 0-6-12dB (Rear) Bass Boost Frequency: 50Hz (Rear) S/N: 105dB Input Sensitivity: 200Mv-6V THD: <0.05% Operation Voltage: 9V-16V DC Fuse Rating: 40A x 2 Dimensions (7.5″W x 2.25″H): 14.50″ L ⚠️Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.

Soundstream BXT4.2000 Bass Xtreme Series 4Ch Amplifier + Absolute KIT0 0 Gauge Amp Kit Quality sound processing is necessary for those who want the most out of their car audio system. Bass Xtreme amplifiers offer similar sound processing options by including the functions of a Bass Reconstruction Processor. Bass Processor boosts lower frequency harmonics that have been compressed or removed from today’s music recordings and are commonly added in-line before subwoofer amplifiers. Dial in the exact sound you want by tuning the frequency to boost, then increase the bandwidth range from that frequency to stimulate the harmonics around it. After slight adjustments, your audio system can sound like audio professionals have tuned it. Unlock and restore the bass from any system with Bass Xtreme Amplifiers. General Features: Bass Xtreme Series 4-Channel Class A/B Car Amplifier Selectable 6db or 12db 50hz bass boost MOSFET Power Supply w/ Audiophile Grade IRTM Transistors Military Grade SMT PCB Maintains Dynamic Performance Direct Short, Thermal, & Overload Circuits Protect Amplifier 200mV-6V High Level or Low-Level RCA Input & Output Variable 12dB Low Pass Crossover Blocks High Frequencies 50-250hz Variable 12dB High Pass Crossover 120-3khz Max Power: 2000 Watts RMS Power @ 4Ω: 110W x 4 RMS Power @ 2Ω: 175W x 4 RMS Bridged @ 4Ω: 350W x 2 Remote Gain Control: N/A Low Pass Filter: N/A (F) / 50Hz-250Hz (R) High Pass Filter: 120Hz-3KHz (F) / 120Hz-3KHz (R) Bass Boost: 0-6-12dB (Rear) Bass Boost Frequency: 50Hz (Rear) S/N: 105dB Input Sensitivity: 200Mv-6V THD: <0.05% Operation Voltage: 9V-16V DC Fuse Rating: 40A x 2 Dimensions (7.5″W x 2.25″H): 14.50″ L   ⚠️Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.

Soundstream BXT4.2000 Bass Xtreme Series 4Ch Amplifier + Absolute KIT4 4 Gauge Amp Kit Quality sound processing is necessary for those who want the most out of their car audio system. Bass Xtreme amplifiers offer similar sound processing options by including the functions of a Bass Reconstruction Processor. Bass Processor boosts lower frequency harmonics that have been compressed or removed from today’s music recordings and are commonly added in-line before subwoofer amplifiers. Dial in the exact sound you want by tuning the frequency to boost, then increase the bandwidth range from that frequency to stimulate the harmonics around it. After slight adjustments, your audio system can sound like audio professionals have tuned it. Unlock and restore the bass from any system with Bass Xtreme Amplifiers. General Features: Bass Xtreme Series 4-Channel Class A/B Car Amplifier Selectable 6db or 12db 50hz bass boost MOSFET Power Supply w/ Audiophile Grade IRTM Transistors Military Grade SMT PCB Maintains Dynamic Performance Direct Short, Thermal, & Overload Circuits Protect Amplifier 200mV-6V High Level or Low-Level RCA Input & Output Variable 12dB Low Pass Crossover Blocks High Frequencies 50-250hz Variable 12dB High Pass Crossover 120-3khz Max Power: 2000 Watts RMS Power @ 4Ω: 110W x 4 RMS Power @ 2Ω: 175W x 4 RMS Bridged @ 4Ω: 350W x 2 Remote Gain Control: N/A Low Pass Filter: N/A (F) / 50Hz-250Hz (R) High Pass Filter: 120Hz-3KHz (F) / 120Hz-3KHz (R) Bass Boost: 0-6-12dB (Rear) Bass Boost Frequency: 50Hz (Rear) S/N: 105dB Input Sensitivity: 200Mv-6V THD: <0.05% Operation Voltage: 9V-16V DC Fuse Rating: 40A x 2 Dimensions (7.5″W x 2.25″H): 14.50″ L ⚠️Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.

Soundstream BXT4.2000 Bass Xtreme Series 4Ch Amplifier Quality sound processing is necessary for those who want the most out of their car audio system. Bass Xtreme amplifiers offer similar sound processing options by including the functions of a Bass Reconstruction Processor. Bass Processor boosts lower frequency harmonics that have been compressed or removed from today’s music recordings and are commonly added in-line before subwoofer amplifiers. Dial in the exact sound you want by tuning the frequency to boost, then increase the bandwidth range from that frequency to stimulate the harmonics around it. After slight adjustments, your audio system can sound like audio professionals have tuned it. Unlock and restore the bass from any system with Bass Xtreme Amplifiers. General Features: Bass Xtreme Series 4-Channel Class A/B Car Amplifier Selectable 6db or 12db 50hz bass boost MOSFET Power Supply w/ Audiophile Grade IRTM Transistors Military Grade SMT PCB Maintains Dynamic Performance Direct Short, Thermal, & Overload Circuits Protect Amplifier 200mV-6V High Level or Low-Level RCA Input & Output Variable 12dB Low Pass Crossover Blocks High Frequencies 50-250hz Variable 12dB High Pass Crossover 120-3khz Max Power: 2000 Watts RMS Power @ 4Ω: 110W x 4 RMS Power @ 2Ω: 175W x 4 RMS Bridged @ 4Ω: 350W x 2 Remote Gain Control: N/A Low Pass Filter: N/A (F) / 50Hz-250Hz (R) High Pass Filter: 120Hz-3KHz (F) / 120Hz-3KHz (R) Bass Boost: 0-6-12dB (Rear) Bass Boost Frequency: 50Hz (Rear) S/N: 105dB Input Sensitivity: 200Mv-6V THD: <0.05% Operation Voltage: 9V-16V DC Fuse Rating: 40A x 2 Dimensions (7.5″W x 2.25″H): 14.50″ L   ⚠️Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.

Alpine R2-A60F R-Series Hi-Res 4 Channel 600 Watt Class D Car Audio Amplifier + Absolute KIT4 Amp Kit Experience the impressive power and exceptional performance of the Next-Gen R-Series R2-A60F 4-Channel Amplifier, now certified for Hi-Res Audio Playback. The R2-A60F features a reduced footprint that’s 15% smaller than the previous model (R-A60F), making it easier than ever to install in most vehicle applications while still getting the same powerhouse performance. General Features: R-Series Class D 2 ohms Stable 4-Channel Amplifier RMS Power Rating: 4 ohms: 100 watts x 4 channel RMS Power Rating: 2 ohms: 150 watts x 4 channel RMS Power Rating: Bridged: 300 watts x 2 channel @ 4 ohms Total power output: 600 watts LED Power/Protect Light Signal sensing remote turn-on Hi-Res Certified CTA-2006 compliant Low level: 0.2 - 4 volts Input sensitivity High level: .5 - 10 volts Input sensitivity Frequency Response: 10 - 45000 Hz Total Harmonic Distortion (THD): <1% Signal to Noise Ratio: 80 dB Variable high-pass filter: 50 - 6,000 Hz Variable low-pass filter: 50 - 400 Hz Fuse Rating: 60A 4 AWG gauge amplifier wiring kit is recommended for installation Dimensions: 11.12" L x 6.92" W x 2.14" H Authorized Internet Dealer 1-year Manufacturer's Warranty What is in the R2-A60F Package: Alpine R2-A60F owner's manual 4-Channel amplifier (2 installed 30A ATO fuses) Four 1" pan-head screws 3mm Allen key 2.5mm Allen key 2mm Allen key Alpine Verification Certificate Warranty information Power supply note ⚠️Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.

Alpine R2-A60F R-Series Hi-Res 4 Channel 600 Watt Class D Car Audio Amplifier Experience the impressive power and exceptional performance of the Next-Gen R-Series R2-A60F 4-Channel Amplifier, now certified for Hi-Res Audio Playback. The R2-A60F features a reduced footprint that’s 15% smaller than the previous model (R-A60F), making it easier than ever to install in most vehicle applications while still getting the same powerhouse performance. General Features: R-Series Class D 2 ohms Stable 4-Channel Amplifier RMS Power Rating: 4 ohms: 100 watts x 4 channel RMS Power Rating: 2 ohms: 150 watts x 4 channel RMS Power Rating: Bridged: 300 watts x 2 channel @ 4 ohms Total power output: 600 watts LED Power/Protect Light Signal sensing remote turn-on Hi-Res Certified CTA-2006 compliant Low level: 0.2 - 4 volts Input sensitivity High level: .5 - 10 volts Input sensitivity Frequency Response: 10 - 45000 Hz Total Harmonic Distortion (THD): <1% Signal to Noise Ratio: 80 dB Variable high-pass filter: 50 - 6,000 Hz Variable low-pass filter: 50 - 400 Hz Fuse Rating: 60A 4 AWG gauge amplifier wiring kit is recommended for installation Dimensions: 11.12" L x 6.92" W x 2.14" H Authorized Internet Dealer 1-year Manufacturer's Warranty What is in the R2-A60F Package: Alpine R2-A60F owner's manual 4-Channel amplifier (2 installed 30A ATO fuses) Four 1" pan-head screws 3mm Allen key 2.5mm Allen key 2mm Allen key Alpine Verification Certificate Warranty information Power supply note ⚠️Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.

Soundstream ST4.500D Stealth Shot Series 500W 4Ch. Amplifier General Features: Hybrid Aluminum Alloy Heatsink for Optimum Dissipation 2-ohm Minimum Impedance Operation MOSFET Power Supply w/ Audiophile Grade IRTM Transistors Military Grade SMT PCB Maintains Dynamic Performance Direct Short, Thermal, & Overload Circuits Protect Amplifier 250mV-12V High-Level or Low-Level RCA Input Automatic Turn-On Hi-Level Signal Sensing Quick Disconnect RCA/High-Level Wire Harness Quick Disconnect Power and Speaker Output Harness Full Variable 12dB High Pass, Low Pass Crossovers Amplifier Dimensions 3″W x 1.5″H x 3.75″W ⚠️Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.

Hifonics ZD-1350.4D 1350 Watt RMS Class-D 4-Channel Car Amplifier + Absolute KIT0 0 Gauge Amp Kit Hifonics ZD-1350.4D ZEUS DELTA Compact 1350 Watt Super D-Class Full Range Four Channel Amplifier. General Features: Class D 2 ohms Stable 4-Channel Amplifier RMS Power Rating @ 4 ohms: 170 watts x 4 channel RMS Power Rating @ 2 ohms: 335 watts x 4 channel Bridged, 4 ohms: 675 watts x 2 channel CEA-2006 Compliant Amplifier Pulse Width Modulated MOSFET power supply LED Power/Protect Light Onboard electronic crossover Speaker-level (high-level) inputs 3-way protection circuitry (thermal, overload, and speaker short protection) Frequency Response: 10 - 22,000 Hz Total Harmonic Distortion (THD): 0.5% Variable high-pass filter: 50 - 250 Hz, 12 dB/octave Variable low-pass filter: 50 - 250 Hz, 12 dB/octave Variable Bass Boost: bass boost at 45 Hz Fuse Rating: 60A 4 AWG gauge power and ground wiring is recommended for installation. Dimensions: 5.75" W x 11.65" L x 2.16" H Authorized Internet Dealer 1-year Manufacturer's Warranty ⚠️Warning:This product can expose you to, known to the State of California to cause cancer. For more information, go to P65Warnings.ca.  

Hifonics ZD-1350.4D 1350 Watt RMS Class-D 4-Channel Car Amplifier + Absolute KIT4 4 Gauge Amp Kit Hifonics ZD-1350.4D ZEUS DELTA Compact 1350 Watt Super D-Class Full Range Four Channel Amplifier. General Features: Class D 2 ohms Stable 4-Channel Amplifier RMS Power Rating @ 4 ohms: 170 watts x 4 channel RMS Power Rating @ 2 ohms: 335 watts x 4 channel Bridged, 4 ohms: 675 watts x 2 channel CEA-2006 Compliant Amplifier Pulse Width Modulated MOSFET power supply LED Power/Protect Light Onboard electronic crossover Speaker-level (high-level) inputs 3-way protection circuitry (thermal, overload, and speaker short protection) Frequency Response: 10 - 22,000 Hz Total Harmonic Distortion (THD): 0.5% Variable high-pass filter: 50 - 250 Hz, 12 dB/octave Variable low-pass filter: 50 - 250 Hz, 12 dB/octave Variable Bass Boost: bass boost at 45 Hz Fuse Rating: 60A 4 AWG gauge power and ground wiring is recommended for installation. Dimensions: 5.75" W x 11.65" L x 2.16" H Authorized Internet Dealer 1-year Manufacturer's Warranty ⚠️Warning:This product can expose you to, known to the State of California to cause cancer. For more information, go to P65Warnings.ca.  

Hifonics ZD-1350.4D 1350 Watt RMS Class-D 4-Channel Car Amplifier Hifonics ZD-1350.4D ZEUS DELTA Compact 1350 Watt Super D-Class Full Range Four Channel Amplifier. General Features: Class D 2 ohms Stable 4-Channel Amplifier RMS Power Rating @ 4 ohms: 170 watts x 4 channel RMS Power Rating @ 2 ohms: 335 watts x 4 channel Bridged, 4 ohms: 675 watts x 2 channel CEA-2006 Compliant Amplifier Pulse Width Modulated MOSFET power supply LED Power/Protect Light Onboard electronic crossover Speaker-level (high-level) inputs 3-way protection circuitry (thermal, overload, and speaker short protection) Frequency Response: 10 - 22,000 Hz Total Harmonic Distortion (THD): 0.5% Variable high-pass filter: 50 - 250 Hz, 12 dB/octave Variable low-pass filter: 50 - 250 Hz, 12 dB/octave Variable Bass Boost: bass boost at 45 Hz Fuse Rating: 60A 4 AWG gauge power and ground wiring is recommended for installation. Dimensions: 5.75" W x 11.65" L x 2.16" H Authorized Internet Dealer 1-year Manufacturer's Warranty ⚠️Warning:This product can expose you to, known to the State of California to cause cancer. For more information, go to P65Warnings.ca.  

 Hifonics ZD-750.4D 750 Watt RMS Zeus Delta Series Class-D 4-Channel Car Amplifier + Absolute KIT0 0 Gauge Amp Kit Hifonics ZD-750.4D ZEUS DELTA Compact 750 Watt Super D-Class Full Range Four Channel Amplifier General Features: Class D 2 ohms Stable 4-Channel Amplifier RMS Power Rating @4 ohms: 100 watts x 4 channel RMS Power Rating @2 ohms: 175 watts x 4 channel Bridged, 4 ohms: 375 watts x 2 channel Pulse Width Modulated PWM MOSFET power supply LED Power/Protect Light Onboard electronic crossover Speaker-level (high-level) inputs 3-way protection circuitry (thermal, overload, and speaker short protection) Frequency Response: 10 - 22 Hz Total Harmonic Distortion (THD): <0.5% Variable high-pass filter: 50 - 250 Hz, 12 dB/octave Variable low-pass filter: 50 - 250 Hz, 12 dB/octave Variable Bass Boost: bass boost at 45 Hz Fuse Rating: 60A 4 AWG gauge power and ground wiring is recommended for installation. Dimensions: 6.89" W x 10.82" L x 3.15" H Authorized Internet Dealer 1-year Manufacturer's Warranty ⚠️Warning:This product can expose you to, known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

 Hifonics ZD-750.4D 750 Watt RMS Zeus Delta Series Class-D 4-Channel Car Amplifier + Absolute KIT4 4 Gauge Amp Kit Hifonics ZD-750.4D ZEUS DELTA Compact 750 Watt Super D-Class Full Range Four Channel Amplifier General Features: Class D 2 ohms Stable 4-Channel Amplifier RMS Power Rating @4 ohms: 100 watts x 4 channel RMS Power Rating @2 ohms: 175 watts x 4 channel Bridged, 4 ohms: 375 watts x 2 channel Pulse Width Modulated PWM MOSFET power supply LED Power/Protect Light Onboard electronic crossover Speaker-level (high-level) inputs 3-way protection circuitry (thermal, overload, and speaker short protection) Frequency Response: 10 - 22 Hz Total Harmonic Distortion (THD): <0.5% Variable high-pass filter: 50 - 250 Hz, 12 dB/octave Variable low-pass filter: 50 - 250 Hz, 12 dB/octave Variable Bass Boost: bass boost at 45 Hz Fuse Rating: 60A 4 AWG gauge power and ground wiring is recommended for installation. Dimensions: 6.89" W x 10.82" L x 3.15" H Authorized Internet Dealer 1-year Manufacturer's Warranty ⚠️Warning:This product can expose you to, known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

 Hifonics ZD-750.4D 750 Watt RMS Zeus Delta Series Class-D 4-Channel Car Amplifier Hifonics ZD-750.4D ZEUS DELTA Compact 750 Watt Super D-Class Full Range Four Channel Amplifier General Features: Class D 2 ohms Stable 4-Channel Amplifier RMS Power Rating @4 ohms: 100 watts x 4 channel RMS Power Rating @2 ohms: 175 watts x 4 channel Bridged, 4 ohms: 375 watts x 2 channel Pulse Width Modulated PWM MOSFET power supply LED Power/Protect Light Onboard electronic crossover Speaker-level (high-level) inputs 3-way protection circuitry (thermal, overload, and speaker short protection) Frequency Response: 10 - 22 Hz Total Harmonic Distortion (THD): <0.5% Variable high-pass filter: 50 - 250 Hz, 12 dB/octave Variable low-pass filter: 50 - 250 Hz, 12 dB/octave Variable Bass Boost: bass boost at 45 Hz Fuse Rating: 60A 4 AWG gauge power and ground wiring is recommended for installation. Dimensions: 6.89" W x 10.82" L x 3.15" H Authorized Internet Dealer 1-year Manufacturer's Warranty ⚠️Warning:This product can expose you to, known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

Alpine S2-A36F 600W Next Generation S-Series Hi Res Class-D 4-Channel Car Amplifier + Alpine RUX-H01 Halo Bass Knob Remote Bass Level Control The next generation of Alpine S-Series amplifiers is designed to take your car audio experience to the next level without breaking the bank. With a sleek new redesign and upgraded features from their predecessors, these amplifiers offer exceptional performance and power on an affordable budget.The S-Series S2-A36F 4-channel amplifier delivers 60 Watts RMS @4 Ohms or 90 Watts RMS @2 Ohms of pristine high-fidelity signal to your car's front and rear speakers, adding sweet, clear sound to your vehicle.The amp brings your music to life by being Hi-Res Audio certified, with its precise details and emotional power revealed with a frequency response up to 40kHz. For a 3-channel 2-way system, you could also use the amp to drive a pair of front speakers with 60 Watts RMS each while powering a subwoofer with 180 Watts RMS from the bridged rear channels. A variable mid-bass boost on those rear channels allows you to dial in some extra kick and impact to your system's low-frequency sound. You can even add the optional wired remote RUX-KNOB2 to control the level of the rear channels from your front seat.High- and low-pass filters put you in command of the frequency spectrum that reaches your speakers and subs. The amp includes preamp- and speaker-level inputs so you can install it in almost any vehicle, even with a factory radio. When using the speaker-level inputs, the amp can sense the incoming signal and turn itself on, eliminating the need to run a separate turn-on wire to the receiver or fuse box. General Features: Hi-Res Audio Certified (Up to 40kHz) Power Rating: 14.4V, < 0.3% THD +N Power Output: 60W RMS x 4 @ 4Ω, 90W RMS x 4 @ 2Ω Bridged Power: 180W RMS x 2 @ 4Ω 4-Channel Amplifier Alpine’s Class D Amplifier Circuit Two-sided terminal layout Built-in Selectable/ Adjustable Crossovers Mid-Bass EQ Input for more power Optional Remote Bass Knob Compatible (required RUX-KNOB.2 or RUX-H01, sold separately) Dimensions: 8.7” W x 2.25” H x 8.25” D Weight: 4 lbs, 13 oz S/N Ratio: >83dB Frequency Response: 20Hz – 40kHz Damping Factor: >100 Owner’s Manual 4 Self-tapping screws Hexagon wrench What is in the S2-A36F package: S2-A36F owner's manual 4-Channel amplifier 2 End caps Four 3/4" screws Four 1/4" screws 2mm Allen key Owner's manual Alpine Verification Certificate Warranty information Power supply note Online product registration information ⚠️Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.

Alpine S2-A36F 600W Next Generation S-Series Hi Res Class-D 4-Channel Car Amplifier + Alpine RUX-KNOB.2 Remote Bass Level Control The next generation of Alpine S-Series amplifiers is designed to take your car audio experience to the next level without breaking the bank. With a sleek new redesign and upgraded features from their predecessors, these amplifiers offer exceptional performance and power on an affordable budget.The S-Series S2-A36F 4-channel amplifier delivers 60 Watts RMS @4 Ohms or 90 Watts RMS @2 Ohms of pristine high-fidelity signal to your car's front and rear speakers, adding sweet, clear sound to your vehicle.The amp brings your music to life by being Hi-Res Audio certified, with its precise details and emotional power revealed with a frequency response up to 40kHz. For a 3-channel 2-way system, you could also use the amp to drive a pair of front speakers with 60 Watts RMS each while powering a subwoofer with 180 Watts RMS from the bridged rear channels. A variable mid-bass boost on those rear channels allows you to dial in some extra kick and impact to your system's low-frequency sound. You can even add the optional wired remote RUX-KNOB2 to control the level of the rear channels from your front seat.High- and low-pass filters put you in command of the frequency spectrum that reaches your speakers and subs. The amp includes preamp- and speaker-level inputs so you can install it in almost any vehicle, even with a factory radio. When using the speaker-level inputs, the amp can sense the incoming signal and turn itself on, eliminating the need to run a separate turn-on wire to the receiver or fuse box. General Features: Hi-Res Audio Certified (Up to 40kHz) Power Rating: 14.4V, < 0.3% THD +N Power Output: 60W RMS x 4 @ 4Ω, 90W RMS x 4 @ 2Ω Bridged Power: 180W RMS x 2 @ 4Ω 4-Channel Amplifier Alpine’s Class D Amplifier Circuit Two-sided terminal layout Built-in Selectable/ Adjustable Crossovers Mid-Bass EQ Input for more power Optional Remote Bass Knob Compatible (required RUX-KNOB.2 or RUX-H01, sold separately) Dimensions: 8.7” W x 2.25” H x 8.25” D Weight: 4 lbs, 13 oz S/N Ratio: >83dB Frequency Response: 20Hz – 40kHz Damping Factor: >100 Owner’s Manual 4 Self-tapping screws Hexagon wrench What is in the S2-A36F package: S2-A36F owner's manual 4-Channel amplifier 2 End caps Four 3/4" screws Four 1/4" screws 2mm Allen key Owner's manual Alpine Verification Certificate Warranty information Power supply note Online product registration information ⚠️Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.