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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- 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.
| Performance | ||
|---|---|---|
| RMS Power Output (Watts x Channels) | 40 x 4 300 x 1 |
|
| Peak Power Output (Watts x Channels) | --- | |
| Power at 2 Ohms (Watts x Channels) | 60 x 4 | |
| Power at 1 Ohm (Watts x Channels) | --- | |
| Bridged Power (Watts x Channels) | 120 x 2 | |
| Minimum Impedance Bridged | 4 | |
| Minimum Impedance Unbridged | 2 | |
| Best Frequency Response | 10Hz-40k Hz | |
| THD at Rated RMS Power | 1% | |
| Signal to Noise Ratio | 83 dB | |
| Input Voltage | 14.4v | |
| Features | ||
| Amplifier Class | D | |
| Built-in DSP | No | |
| Remote Control | Optional (Sub channel) | |
| Low-Pass Crossover Frequency | 50-400 Hz | |
| Low-Pass Slope (dB/octave) | 24 dB/octave | |
| High-Pass Crossover Frequency | 50-400 Hz | |
| High-Pass Slope (dB/octave) | 12 dB/octave | |
| Bass Boost | 0-12 dB | |
| Bass Boost Frequency | N/A | |
| Fan Cooled | No | |
| Fuse Rating | 60 | |
| Speaker Level Inputs | Yes | |
| Preamp Outputs | No | |
| Width (inches) | 11-15/16 | |
| Height (inches) | 2-1/4 | |
| Depth (inches) | 8-5/16 | |
| Parts Warranty | 1 Year | |
| Labor Warranty | 1 Year | |
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:
Other Specifications:
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:
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).
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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