Alpine S2-A120M S-Series 1200W RMS x 1 at 2 Ohm, Class-D Mono Subwoofer Car Amplifier
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What's Inside?
- • Mono subwoofer amplifier (four 25A ATO fuses installed)
- • (2) End caps
- • (4) 3/4" screws
- • (4) 1/4" screws
- • 2.5mm Allen key
- • Alpine Verification Certificate
- • Warranty information
- • Power supply note
- • On-line product registration information
- • Owner's Manual
Why Choose Alpine S2-A120M Mono Subwoofer Amplifier?
Power That Packs a Punch
The Alpine S-Series S2-A120M 1200W Mono Amplifier delivers uncompromising power and performance at an incredible value. With up to 1200W at 1Ω or 2Ω, this amp drives even the most demanding subwoofers with precision, producing clean, distortion-free bass that brings your music to life.
Seamless Integration for Any System
The next-generation S-Series amplifiers introduce a selectable remote turn-on circuit with a three-position switch, ensuring your amp powers on and off at the right time. This feature guarantees flawless compatibility with modern in-vehicle technology, making it easy to integrate into both factory and aftermarket audio systems.
Convenient Side-Mounted Controls
This amplifier is thoughtfully designed with sound controls positioned on the side panels rather than the top, making adjustments to gain and crossover settings effortless even in tight spaces like under seats or shallow installs. Removable end caps provide a polished, streamlined look by concealing the controls and connections for a clean finish.
Frequently Asked Questions (FAQ)
- • How can I control the bass level from the front seat?
You can purchase an optional wired remote bass knob, such as the RUX-KNOB.2 or RUX-H01, to adjust the subwoofer level conveniently.
- • What size subwoofer is the best match for this amplifier?
It performs best with a subwoofer whose RMS power handling closely matches the amplifier's continuous power output. Proper matching delivers cleaner bass while helping protect your equipment.
- • Why does the amplifier keep going into protection mode?
Protection mode is commonly caused by overheating, incorrect wiring, poor grounding, or an incompatible speaker impedance. Inspecting the wiring and verifying the subwoofer load usually resolves the issue.
- • Why isn't my subwoofer producing any sound?
This can happen if the remote turn-on wire, RCA cables, or speaker wiring are not connected correctly. Double-checking every connection and the source unit settings usually restores audio output.
- • Why does the bass become distorted at higher volumes?
Distortion is often caused by excessive gain, amplifier clipping, or incorrect low-pass filter settings. Proper tuning helps produce clean, powerful bass while protecting the subwoofer.
- • Does this amplifier get hot during normal operation?
Yes, it is normal for the amplifier to become warm during extended use. Installing it in a well-ventilated location helps maintain stable performance and prevents overheating.
- • How do I set the gain correctly?
The gain should be adjusted to match your head unit's output voltage instead of being used as a volume control. Correct adjustment minimizes distortion and maximizes clean bass output.
- • Why do I hear alternator whine through my subwoofer?
This is usually caused by poor grounding or electrical interference from improperly routed wiring. Improving the ground connection and separating power cables from signal cables typically eliminates the noise.
- • Can this amplifier be mounted under a seat?
Yes, its compact design makes it suitable for installation under many vehicle seats or in other tight spaces. Leave enough clearance around the amplifier to allow proper airflow for cooling.
- • Is this amplifier worth upgrading from a powered head unit?
Most users notice significantly stronger bass, better low-frequency control, and cleaner output after adding a dedicated mono amplifier. It allows your subwoofer to perform much closer to its full potential than a head unit alone.
- Low Frequency Response : 50-400 Hz
- Number of Channels : 1
- Frequency Response : 10-400 Hz
- Built In Crossovers : Yes
- RMS Power Output : 1x1200 Watts
- Amplifier Class : D
- Fuse Rating : 100 A
Features:
- 1200W Mono Power Amplifier: Delivers powerful bass performance for entry-level systems.
- Alpine’s Class D Amplifier Circuit: Ensures efficient power delivery with reliable performance.
- Two-Sided Terminal Layout: Simplifies installation and cable management.
- Built-in Selectable / Adjustable Crossovers: Allows precise tuning for optimal sound quality.
- Optional Remote Bass Knob Compatible: Works with RUX-KNOB.2 or RUX-H01 (sold separately) for convenient bass control.
Specifications:
- RMS Power Output: 600W x 1
- Peak Power Output: ---
- Power at 2 Ohms: 1200W x 1
- Power at 1 Ohm: 1200W x 1
- Bridged Power: ---
- Minimum Impedance (Bridged): ---
- Minimum Impedance (Unbridged): 1 Ω
- Frequency Response: 10 Hz – 400 Hz
- THD at Rated RMS Power: 1%
- Signal-to-Noise Ratio: 85 dB
- Input Voltage: 14.4 V
- Amplifier Class: D
- Built-in DSP: No
- Remote Control: Optional
- Low-Pass Crossover Frequency: 50 – 400 Hz
- Low-Pass Slope: 24 dB/octave
- High-Pass Crossover Frequency: N/A
- High-Pass Slope: N/A
- Bass Boost: 0 – 12 dB
- Bass Boost Frequency: 50 Hz
- Fan Cooled: No
- Fuse Rating: 100 A
- Speaker Level Inputs: Yes
- Preamp Outputs: 2
- Dimensions (W x H x D): 13.75" x 2.25" x 8.3125"
- UPC: 793276085153
- Weight: 7
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for repair within 1 year from the original date of purchase with proper return authorization.
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Write a review!
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wow! What an upgrade from my old Alpine amp! There’s so much power from this amp and the sound quality has never been better now that I have it installed in my car. Running my 12 inch sub and the bass is really crazy good with the amp.
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Paired with two Alpine subs, everything is top notch with this amazing amp! From build quality to sound quality, its really one of the best choices out there. There’s so much power with the amp that I feel like I can still add another sub with my setup. However, I’m not trying to go deaf, so it won’t happen anytime soon haha
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This amp is badass!!! Pushing one ten Alpine S2 and whoa!!!! Makes the back glass of my 07 mustang wave like water on some notes!!! Pretty impressive to me. Great job Alpine ??
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This amp is powerful!!! Wether it be 12 or 10 inch subs this amp will get tha job done!!
