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X-Series amplifiers are built on a new Alpine-proprietary circuit design that achieves class-leading power density and reliability while performing at the top of its class. By simplifying the circuit topology, Alpine is able to ensure the cleanest possibl

Alpine® 4 Channel Power Amplifier

Alpine’s top engineers from all over the world gathered in Alpine headquarters to deeply research and evaluate sound systems from both the aftermarket and high-end OE manufacturers. Many systems today have incredible dynamic range and reach sufficient volume levels, but lacked the reality of instruments and spatial imaging. As a result, Alpine ID was born, a sound philosophy that continues to inspire us to create a new level of sonic performance.

Or Alpine ID for short, is the new Alpine global sound culture with an evolutionary approach for solving what’s missing in most car audio systems these days: great spatial imaging and depth of sound stage. It centers on developing matched sound systems with core components that work together to achieve greater realism in the sound stage while maintaining great dynamic range and accuracy.

Keeping The Heat Down While Faithfully Reproducing Music

At the core of the X-Series Amplifier’s chassis is a solid cast aluminum heat sink which keeps the amplifier cool when performing at its peak power levels. Excess heat is removed from the amplifier through the newly designed heat sink profile which both improves airflow and increases surface cooling area. The fan-less channels located on both sides of the amp allow for convection flow of air; hot air naturally rises out from the top of the amplifier, which causes a vacuum that sucks in cool air from below. This smart design allows for continuous thermal control for an uninterrupted listening experience.

X-Series Amplifiers come with their very own birth sheet which reveals each amplifier’s true power rating.

High Performance While Retaining Class-Leading Power Density

X-Series amplifiers are built on a new Alpine-proprietary circuit design that achieves class-leading power density and reliability while performing at the top of its class. By simplifying the circuit topology, Alpine is able to ensure the cleanest possible signal path. While the simplicity of the circuit contributes to a great sounding signal, we added an exclusive dual feedback loop that corrects signal distortion. This clever design results in a frequency response that not only meets the Hi-Rez audio standard of 40kHz but even extends up to 60kHz. The amp maintains a very low phase shift throughout the music spectrum which allows your music stay faithful to the original recording with realism that puts you in the center of the performance.

X-Series amplifiers are built on a new Alpine-proprietary circuit design that achieves class-leading power density and reliability while performing at the top of its class. By simplifying the circuit topology, Alpine is able to ensure the cleanest possible signal path. While the simplicity of the circuit contributes to a great sounding signal, we added an exclusive dual feedback loop that corrects signal distortion.

Power Reference amplifiers feature a bold design complete with a wrap around LED accent light beam and a magnetic control panel cover allowing you to adjust the amplifier controls without tools for an effortless adjustments.  The new cast aluminum chassis

Memphis Audio Power Reference 300W 4-Channel Amplifier

Power Reference amplifiers feature a bold design complete with a wrap around LED accent light beam and a magnetic control panel cover allowing you to adjust the amplifier controls without tools for an effortless adjustments.  The new cast aluminum chassis promotes improved heat dissipation which improves reliability and performance.  PR amplifiers deliver the power and performance Memphis Audio fans have come to expect from our best-selling amplifier line.

Street Reference amplifiers are the ultimate combination of performance, style and value. They feature a bold new look complemented by an ultra-bright micro-LED strip. These amplifiers bright solid performance without breaking the bank.

Memphis Audio Street Reference 300W 4-Channel Amplifier

Remote level control/bass knob (mono amps)

The new R-Series amplifiers produce accurate imaging and dependable power. Use them with the R-Series speakers and amplifiers for a loud and fun experience.

Alpine® R-Series 4/3/2 Channel Power Density Amplifier

Alpine’s Class D Amplifier Circuit with Dual Post-Filter Feedback Loops

CTA-2006-B Power Rating: 100W RMS x 4 (4ohm, 14.4V = 1% THD+N); 150W RMS x 4 (2ohm, 14.4V= 1% THD+N)

Bridged: 300W x 2 (4ohm, 14.4V, =1% THD+N)

S/N ratio: >85dB (ref: 1W into 4 ohm), 106dB (at rated power)

The R-Series amplifiers utilize Alpine’s advanced amplifier platform that takes the classic Class-D amplifier circuit and adds dual post-filter feedback loops for unmatched accuracy and control. This technology., originally launched in the premium X-Series amplifiers,, produces efficient power with enhanced dynamic range, qualifying the R-Series amplifiers to be Hi-Resolution Audio compliant.

This new technology minimizes audible imperfections like excessive phase shift and internal noise which can deteriorate sound quality. With an incredibly low phase shift of 46°, the R-A60F 4-channel amplifier delivers accurate imaging compared to well over 100° of phase shift by a competitive amplifier model. This superior phase curve ensures a proper sound stage among the singers and instruments.

The R-Series amplifiers are tuned for a proper sound stage to make your music sound even better, no matter the genre you prefer. Like hip hop? These amplifiers deliver punchy notes with low extension. Prefer rock? The R-Series amplifiers will make you feel the power and energy of percussion, highs, and lows.

R-Series amplifiers have a built-in bandpass filter which lets you design an active speaker set-up without a separate processor. Improve the sound quality of component speakers by ditching your passive network.  Avoid added phase shifts and power losses by individually powering each component and assigning your own frequency bands for the incredible sound you’re looking for.

The “R” line of speakers and subwoofers have a heritage of sound quality you can hear from a block away, and the newly added R-Series amplifiers are no exception.  Aside from their best-in-class performance, these amplifiers are tuned to emphasize the characteristics of the R-Series speakers and subwoofers, giving you that legendary R-Series experience .

S-Series amplifiers are your sound system’s workhorse. With unmatched reliability and budget-friendly prices, these amplifiers are the better choice in performance value.

Alpine® S-Series 4/3/2 Channel Power Amplifier

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)

Perfect for beginners and enthusiasts alike, the S-Series amplifiers have the technology to improve your music experience yet are still friendly on your wallet. Used in conjunction with our advanced S-Series speakers and subwoofers, they create a complete sound system that takes your in-vehicle music experience to the next level.

The S-Series amplifiers are designed to fit anywhere.  Measuring at 8”, these amplifiers can be mounted under seats or behind panels.  Though they sport a compact footprint on the outside, they produce impressive power on the inside The S-A32F 4-Channel Amplifier boasts the perfect amount of power to drive the newly redesigned S-Series speakers to their optimal performance for clean and accurate sound.

The S-Series amplifiers contain technology that was previously only available in our premium line up of amplifiers, the R- and X-Series models. The S-Series models are based on Alpine’s intelligent amplifier platform that ensures superior sound reproduction and precision imaging. With an improved heat sink, and protection circuit design that eliminates thermal shut-down, your music will keep playing no matter where your drive takes you.

This tiny amplifier can be installed with an aftermarket or factory head unit, resulting in up to 4 times the power increase over the head unit's original built-in power.

Alpine® 4-Channel Weather Resistant Tough Power Pack Amplifier

Alpine's Class D amplifier circuit with Dynamic Peak Power (D.P.P.)

150W x 4 D.P.P. (2O/4O, 14.4V, = 1% THD+N)

CTA-2006-B Specifications: 75W RMS x 4 (2O/4O, 14.4V, = 1% THD+N)

OEM-grade Tyco 26-pin connector with pigtail wire harness

Speaker/RCA inputs (Selectable, High range=0.5-10V, Low range=0.2-4V)

Crossovers: Off/HP/LP, Fc=50-400Hz @ -12dB/Oct. (variable)

A Sound System Boost Without The Big Space Commitment

The KTA-F30W is perfect for when you want to boost your sound system but don’t have the space for a large amplifier. It is compatible with an aftermarket or factory head unit and adds up to 4 times the power over the head unit's original built-in power.

The KTA-30FW features Alpine’s exclusive Dynamic Peak Power (DPP) technology which uses a new dynamic power supply design that delivers bursts of power during rigorous musical passages. When the amplifier senses that more power is required, the power supply quickly increases the internal gain level, effectively doubling the power for a significant increase in dynamic range at high music volumes.

The KTA-30FW is ready for your adventures. It is weather resistant, rated at IP66 for protection again dust ingress and high-pressure water spray. The KTA-30FW features a rugged chassis and high-quality waterproof connector so it can be used in installations where it will be exposed to the elements, like side-by-sides, boats, open-top vehicles and motorcycles.

Half The Size Of Our Smallest Traditional Amplifiers

The KTA-30FW measures just 9-3/16" (W) x 1-5/8" (H) x 3-3/4" (D), so its small footprint lets it fit where most amplifiers won't. The KTA-30FW can be tucked away under the dash or in the glove compartment, installed under the dash of a side-by-side, placed in the saddlebag of a motorcycle, or used in other places where space is an issue.

The next generation of Power Pack is here! The compact KTA-450 Power Pack Amplifier utilizes Alpine’s exclusive DPP technology for a big power boost in a small space.

Alpine® 4-Channel Power Pack Amplifier with PowerStack Capability

Compact size, measuring just 7” W x 3.5” H x 1.25” D

Dynamic Peak Power (DPP) technology doubles the power during dynamic musical passages

PowerStacking bracket included for mounting to the iLX-W650 7” Mech-less AV Receiver (sold separately)

The KTA-450 used with the iLX-W650 is a 2019 CES Innovation Awards Winner

DPP Power Rating: 100W DPP x 4 (2/4 Ohm, 14.4V, =1% THD+N)

CTA-2006 Power Rating: 45W RMS x 4 (2/4 Ohm, 14.4V, =1% THD+N)

Exclusive Amplifier Technology, Dynamic Peak Power (DPP)

The KTA-450 can mount behind select Alpine 2-DIN mech-less head units, like the iLX-W650, using the included bracket. The KTA-450’s recessed harness receptacle allows the wiring to fold between it and the head unit so both products fit in a standard 2-DIN space. This PowerStack design is a 2019 CES Innovation Awards winner  and makes the duo one of the most powerful 2-DIN radios available.

The KTA-450 features Alpine’s exclusive Dynamic Peak Power (DPP). DPP intelligently adjusts the gain to adapt to musical needs. DPP prevents the KTA-450 from clipping by supplying up to double the power for sudden, dynamic sounds. DPP ensures music sounds the way it should at high volumes and boosts the KTA-450 to 400 watts DPP, doubling its power without increasing its size.

Compact Size For Hidden Installation Applications

The KTA-450 measures just 7” W x 3.5” H x 1.25” D.  For vehicles that do not have the space for a traditional amplifier, the KTA-450’s small size allows it to be tucked away in hidden areas such as in the glove box or behind the radio. It could even be used in a motorcycle’s saddlebag or on a boat.

Simple Installation For Use With Any Radio

Thanks to the efficient power needs of the DPP technology, the KTA-450 does not require a new power supply wire at the battery, so installation is fast using the supplied radio power wires. In addition, the KTA-450 uses a 22-pin power harness with a recessed design on one side, so the cables can be tucked-in for a cleaner, less-bulky installation.

The KTP-445U Universal Power Pack amplifies both an aftermarket or factory installed head unit power output, resulting up to a 150 percent power increase over the original power from the head unit's built-in amplifier.

Alpine® 4 Channel Universal Power Pack Car Amplifier

Add higher output and more dynamic response with this easy-to-install Universal Power Pack upgrade.

For aftermarket and factory installed systems

Compact size lets the KTP-445U fit where most amplifiers won’t. The KTP-445U comes equipped with the RCA and Auto-Sensing-Speaker level connectors and it fits behind the head unit in the dash of most vehicles. It's small and compact at only 7-7/16” x 1-1/2” x 2-1/2”. The size and flexible wires make the Power Pack an easy choice to save space.

Independent Filters For Rear and Front Inputs

High-Pass selectable switches for Front & Rear allow frequency filtering for a wide variety of speakers. Choose from full range to selectable range: 60Hz, 80Hz or 120Hz to fine-tune your crossover points.

Need configurable options for Speaker-Level or RCA inputs to the Power Pack? On the bottom panel of the Power Pack there are selectable input options to accommodate Speaker-Level (0.5V-10V) or RCA (0.2V – 4V) inputs. Selectable 2 Channel and 4 Channel options give you the control to determine source inputs, and can eliminate the need for Y-adapters.

The Power Pack provides simple variable gain controls on the end panel for flexibility and a wide variety of system applications.

Best Signal-To-Noise Contender In Its Class

In order to ensure that Alpine sound quality is heard at your ears, we’ve created a platform that offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result: The Power Pack boasts 1 Watt Signal-to-Noise Ratio of 82dB or better.

Total Harmonic Distortion (THD+N) Vs. Frequency

Uniquely, the Power Pack distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion. - < 0.03% THD+N @ 1W, 1% THD+N @ rated power.

The KTP-445A Power Pack amplifies power output on select 2005 and newer Alpine head units, resulting in up to a 150 percent power increase over the original power from the head unit's built-in amplifier.

Alpine® 4-Channel Power Pack Car Amplifier

Add higher output and a more dynamic response with this easy-to-install Alpine head unit Power Pack upgrade.

For select 2005 and newer Alpine head units

Compact size lets the KTP-445A fit where most amplifiers won’t. The KTP-445A comes equipped with direct plug-in connectors for select 2005 and newer Alpine head units and it fits behind the dash of most vehicles. It's small and compact at only 7-7/16” x 1-1/2” x 2-1/2”. Its size and flexible wires make the Power Pack an easy choice to save space.

In order to ensure that Alpine sound quality is heard, we’ve created a platform that offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result: The Power Pack boasts 1 Watt Signal-to-Noise Ratio of 82dB or better.

Total Harmonic Distortion (THD+N) vs. Frequency

Uniquely, the Power Pack distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion. - <0.03% THD+N @ 1W, 1% THD+N @ rated power.

Street Edge amplifiers were designed to be affordable without sacrificing performance. The stripped down styling of these amplifiers allowed more resources to be dedicated to achieving solid performance with big power ratings at an affordable price point.

Memphis Audio Street Edge Black 4 Channel Car Amplifier

RMS Power 4 ohms (w)

RMS Power 2 ohms (w)

RMS Power 1 ohms (w)

THD% 4 ohms

Input Range

Recommended Amp Kit

VIV SixFive Series amplifiers boast big power and acoustically accurate performance wrapped in a beautiful anodized brushed aluminum package. The single sided wire terminals make running a clean install simple and adjusting the amp has never been easier t

Memphis Audio SixFive Series Gunmetal 4 Channel Car Amplifier

7-Color selectable LED logo and ground lighting end caps

Brushed anodized aluminum gunmetal finish

Ultra-efficient full range class D topology

HP/LP filters on all channels with 2 channels including BP filter

DSP with 24 dB crossover slopes (400.4, 600.4, 750.6)

SixFive Series amplifiers are built on a relatively compact chassis given their impressive power handling making locating a suitable mounting location simple.

VIV SixFive Series amplifiers boast big power and acoustically accurate performance wrapped in a beautiful anodized brushed aluminum package. The single sided wire terminals make running a clean install simple and adjusting the amp has never been easier thanks to the top mounted magnetic door covering the precision DSP control panel.

4-Channel Amps

Alpine® 4 Channel Power Amplifier

$799.95

Alpine® 4 Channel Universal Power Pack Car Amplifier

$289.95

Alpine® 4-Channel Power Pack Amplifier with PowerStack Capability

$219.95

Alpine® 4-Channel Power Pack Car Amplifier

$279.95

Alpine® 4-Channel Weather Resistant Tough Power Pack Amplifier

$419.95

Alpine® R-Series 4/3/2 Channel Power Density Amplifier

$499.95

Alpine® S-Series 4/3/2 Channel Power Amplifier

$219.95

Memphis Audio Power Reference 300W 4-Channel Amplifier

$369.95

Memphis Audio SixFive Series Gunmetal 4 Channel Car Amplifier

$499.95

Memphis Audio Street Edge Black 4 Channel Car Amplifier

$179.95

Memphis Audio Street Reference 300W 4-Channel Amplifier

$239.95

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