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Alpine S2-A55V S-Series 5-channel car amplifier — 40 watts RMS x 4 at 4 ohms + 300 watts RMS x 1 at 2 ohms

Item # 500S2A55V

Alpine's Next Generation S-Series S2-A55V 5-channel amp delivers high-fidelity signals to your speakers and sub.

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Alpine's Next Generation S-Series S2-A55V 5-channel amp delivers high-fidelity signals to your speakers and sub.

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Item # 500S2A55V

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$399.95

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About the Alpine S2-A55V

Buck Pomerantz

High-resolution power for your whole system

Alpine's Next Generation S-Series S2-A55V 5-channel amplifier will deliver 40 watts RMS of pristine high-fidelity signal to each of your car's front and rear speakers while powering a subwoofer with up to 300 watts RMS at the same time. The amp's combination of extended high-frequency response in its 4-channel section and extra bass power from the sub channel brings your music to life, with all the precise details, pounding beats, and emotional power clearly revealed. For a 3-channel 2-way system, you could also use the amp to drive a pair of front high-performance speakers with 120 watts RMS each, while powering a subwoofer with 300 Watts. A variable bass boost on the sub channel allows you to dial in some extra kick and impact to your system's low-frequency sound. You can even add an optional wired remote to control the level of bass from your front seat.

High-resolution power for your whole system

Alpine's Next Generation S-Series S2-A55V 5-channel amplifier will deliver 40 watts RMS of pristine high-fidelity signal to each of your car's front and rear speakers while powering a subwoofer with up to 300 watts RMS at the same time. The amp's combination of extended high-frequency response in its 4-channel section and extra bass power from the sub channel brings your music to life, with all the precise details, pounding beats, and emotional power clearly revealed. For a 3-channel 2-way system, you could also use the amp to drive a pair of front high-performance speakers with 120 watts RMS each, while powering a subwoofer with 300 Watts. A variable bass boost on the sub channel allows you to dial in some extra kick and impact to your system's low-frequency sound. You can even add an optional wired remote to control the level of bass from your front seat.

Alpine S2-A55V

S2-A55V inputs and controls

More convenient features

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 one 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.

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Product highlights:

  • 5-channel car amplifier
    • 40 watts RMS x 4 + 200 watts RMS x 1 at 4 ohms
    • 60 watts RMS x 4 + 300 watts RMS x 1 at 2 ohms
    • 120 watts RMS x 2 bridged at 4 ohms + 300 watts RMS x 1 at 2 ohms
  • channels 1-4:
    • Hi-Res Audio Certified (frequency response: 10-40k Hz)
    • variable high-pass filters (50-400 Hz, 12 dB/octave)
  • sub channel:
    • variable low-pass filter (50-400 Hz, 24 dB/octave)
    • variable bass boost (0-12 dB at 50 Hz)
    • optional wired remote available
More Info:
  • preamp and speaker-level inputs
    • speaker-level inputs handle up to 10V
    • RCA adapters required for speaker-level input
    • signal-sensing turn-on with speaker-level inputs
  • wiring and hardware not included with amplifier
  • fuse rating: 30A x 2
  • dimensions: 11.88"W x 2.23"H x 8.28"D
  • warranty: 1 year
  • MFR # S2-A55V

What's in the box:

  • 5-Channel amplifier
  • Two 30-amp ATO fuses (installed)
  • 2 End caps
  • Four 3/4" Screws
  • Four 1/4" screws
  • 2mm Allen key
  • Owner's manual (En/ Sp/ Fr/ Others)
  • Alpine Verification Certificate
  • Warranty information
  • Power supply note
  • On-line product registration information

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More details on the Alpine S2-A55V

Mark G.

Product Research

Features
Controls
Connections
Features

Overview: The Alpine S2-A55V 5-channel amplifier is effectively three amps built into one chassis, two (almost) full range 2-channel amps, and one mono subwoofer amp. Each of the 2-channel amps is bridgeable, so it can be wired as 5-channel, 4-channel, or 3-channel.

CTA-2006 Compliant: CTA-2006 is a system of testing and measurement for mobile audio amplifiers. This voluntary standard advocates a uniform method for measuring an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring amplifier power uses a DC input voltage of 14.4 volts and the RMS power output is measured over a frequency range of 20 Hz to 20 kHz (for full range amplifiers), with 1% or less Total Harmonic Distortion plus noise (THD+N). Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4 ohms. CTA-2006 standards allow consumers to compare car amplifiers and receivers under the same conditions (apples to apples).

CTA-2006 Specifications:

  • Power Output: 40 watts RMS x 4 + 200 watts RMS x 1 into 4Ω
  • Signal to Noise Ratio: 83 dBA (measured at 1 watt into 4Ω)

Other Specifications:

  • Power Output:
    • 2Ω: 60 watts RMS x 4 + 300 watts RMS x 1 (14.4 volts, =1.0% THD+N)
    • Bridged: 120 watts RMS x 2 (14.4 volts, into 4Ω)
  • Signal to Noise Ratio: 98 dB (at rated power output, into 4Ω)
  • Frequency Response:
    • +0/-3 dB (1W into 4Ω): 50 Hz - 40 kHz (Channels 1/2/3/4) and 10 Hz - 400 Hz (Subwoofer)
    • +0/-1 dB (1W into 4Ω): 60 Hz - 20 kHz (Channels 1/2/3/4) and 20 Hz - 300 Hz (Subwoofer)
Controls

Gain Control: There are independent rotary gain controls for the three sections of the amplifier (Channel 1/2, Channel 3/4, and Sub). The amp will accept preamp level signals from 0.2 volts to 4.0 volts or speaker level signals from 0.5 volts to 10 volts.

Turn-On Type/Input Level: A 3-way switch lets you select both the amp activation method and the input signal type. Choices include:

  • DC/HI: Used when running speaker-level inputs and using DC offset to trigger the amp.
  • REM/HI: Used when running speaker-level inputs, but using a +12V trigger wire (REM) to activate the amp.
  • REM/LO: Used when running RCA pre-amp signals into the amp and connecting a +12V trigger wire (REM) to activate the amp.

Input Channel: You can choose to send a 6-channel signal from the source unit to the amplifier, or feed all channels with a 2-channel or 4-channel signal. The Input Channel Selector switch for Channel-3/4 is set to 1/2 if you have a 2-channel input signal, or to 3/4 if you have a 4-channel source. The Input Channel switch for the subwoofer channel is set to 1+2+3+4 if you have a 2-channel or 4-channel source, or Sub if you have a dedicated subwoofer input source.

Crossovers: Each amplifier section has an independent crossover; high pass for channels 1/2 and 3/4, and low pass for the Sub channel. The crossovers are always engaged (they cannot be bypassed), and the crossover point for each is adjustable from 50 Hz to 400 Hz. The high pass slope is 12 dB/octave and the low pass slope is 24 dB/octave.

Optional Remote Control: The amplifier has an RJ-25 jack for adding the optional RUX-KNOB.2 wired remote bass level control to adjust the Sub channel output level. The remote has a 20dB adjustment range (-20 dB to 0 dB relative to the gain setting).

Connections

Power/Ground: Two set-screw terminals connect the power and ground cables. The terminals accept up to 4-gauge wire (a 4-gauge wiring kit is recommended). The set screws are tightened/loosened with the included 2mm Allen wrench.

Remote Turn-on: The remote turn-on set screw terminal will accept up to 8-gauge wire. The set screw is tightened/loosened with the included 2mm Allen wrench.

Speaker Outputs: The five pair of speaker outputs' set-screw terminals will accept up to 10-gauge wire. The set screws are tightened/loosened with the included 2mm Allen wrench.

Signal Input: Three pair of RCA jacks, labeled Channel 1/2, Channel 3/4 and Sub, connect to preamp level or speaker level input signals. If connecting the source unit's speaker wire to the input jacks, use a Speaker-to-RCA adapter or splice speaker wire to an RCA plug. When using a speaker level input signal, it may not be necessary to connect a remote turn-on lead because of the amplifier's remote sensing function.

Fuses: The two 30-amp ATO fuses protect the amplifier. Another fuse (60-amp minimum) should be placed on the +12V power wire within 18" of the battery.

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Customer Q&A

1 question already asked

Q
If I install this S2-A55V amp in a 22 Honda Ridgeline, do I need a line converter like the LC7i? or will this amp handle the speaker level input on it's own?
jeffrey  Jun 16, 2023
1 answer
A
Greetings Jeff, and thank you for your question. This Alpine S2-A55V can take high level in, but thru the RCA inputs. You would need RCA to speaker wire adapters for this. On the other hand, the LC7i will have Accu bass, and Bass restoration that is not built into the amplifier. So adding the LC7i is still not a bad idea.
hogan  Jun 16, 2023 (Staff)

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