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Deal.ai › Alpine
Alpine
Alpine Class D Mono Block Car Amplifier 750W RMS Monoblock Amp R2-A75M

Alpine Class D Mono Block Car Amplifier 750W RMS Monoblock Amp R2-A75M

Best price now

$391.68at eBayChecked 7 h ago

35% under what the other stores charge

Compared across 13 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.

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Price facts

  • Lowest price today: $391.68 at eBay (checked Nov 13, 2026).
  • Checked at 13 stores.

Our take on the Alpine Class D Mono Block Car Amplifier 750W RMS Monoblock Amp R2-A75M

The Alpine R2-A75M is a Class D monoblock car amplifier rated at 750W RMS, built for driving a subwoofer. It uses an all-digital circuit designed to avoid thermal shutdown, so it holds output at high volume. The cast aluminum chassis is about 15% smaller than the previous R-Series, which helps in tight installs. It suits shoppers who want strong bass from a compact amp and who value clean build over extra channels.

Best forPowering a single subwooferCompact installs behind a seat or in a small trunkDrivers upgrading from an older R-Series ampSystems that need sustained high-volume bass
Pros
  • 750W RMS into a subwoofer load
  • Digital design resists thermal shutdown
  • About 15% smaller than the previous R-Series
  • Cast aluminum body and machined terminal blocks
  • Top-panel controls are easy to reach after mounting
Cons
  • Monoblock only: it drives one sub, not full-range speakers
  • Needs a stout power and ground wiring run for full output
  • Setup depends on correct gain and crossover tuning

Alpine Class D Mono Block Car Amplifier 750W RMS Monoblock Amp R2-A75M prices at every store

  • Best BuyNew

    In stock

    $499.99Free shippingChecked 7 h ago
    Visit Best Buy
  • CrutchfieldNew

    In stock

    $599.95Free shippingChecked 7 h ago
    Visit Crutchfield
  • Abt Electronics & AppliancesNew

    In stock

    $599.95Free shippingChecked 7 h ago
    Visit Abt Electronics & Appliances
  • JBI PLUSNew

    In stockPriced in MYR (MYR 5,759.60)Return policy

    $1,412.19Checked 7 h ago
    Visit JBI PLUS
  • eBayNew

    Availability unknownSold by acr_caraudio_store

    $391.68Checked 7 h ago
    Visit eBay
  • WalmartNew

    Availability unknownSold by Car Audio Closeout

    $570.00Checked 7 h ago
    Visit Walmart
  • TargetNew

    Availability unknown

    $599.95Checked 7 h ago
    Visit Target
  • Creative AudioNew

    Availability unknown

    $599.95Checked 7 h ago
    Visit Creative Audio
  • trailseven.comNew

    Availability unknown

    $599.95Checked 7 h ago
    Visit trailseven.com
  • SonicElectronix.comNew

    Availability unknown

    $599.95Checked 7 h ago
    Visit SonicElectronix.com
  • mooncarstereoNew

    Availability unknown

    $599.95Checked 7 h ago
    Visit mooncarstereo
  • Hi-Tech Car AudioNew

    Availability unknown

    $599.95Checked 7 h ago
    Visit Hi-Tech Car Audio
  • Pro Audio CenterNew

    Availability unknown

    $599.95Checked 7 h ago
    Visit Pro Audio Center

Store links may earn us a commission.

Alpine Class D Mono Block Car Amplifier 750W RMS Monoblock Amp R2-A75M price history

Lowest price we've seen: $391.68 on Nov 13 at eBay. Tracked across 12 stores since Nov 13.

About the Alpine Class D Mono Block Car Amplifier 750W RMS Monoblock Amp R2-A75M

The Alpine R2-A75M is a Class D monoblock car amplifier from the R-Series. It delivers 750W RMS at 2 ohms and 500W RMS at 4 ohms. Its all-digital "no shutdown" circuit design is built to hold performance at high power output.

The body is solid cast aluminum with precision machined finishes and high quality terminal blocks. The chassis is compact, and R-Series amplifiers are 15% smaller than their predecessors. The controls sit on the top panel under a cover panel. A single-sided terminal layout and integrated chassis mounting are designed to simplify installation.

It accepts RCA and speaker level inputs and can be bridged. Built-in tools include a bandpass filter, a variable low pass filter, a subsonic filter and a bass EQ. Thermal protection is included. It is ready for the optional RUX-KNOB.2 remote bass knob.

Type
Class D monoblock car amplifier
Channels
Mono
Power at 4 ohms
500W x 1 (14.4V, 1% THD)
Power at 2 ohms
750W x 1 (14.4V, 1% THD)
THD+N
10W into 4Ω: ≤0.04%; 10W into 2Ω: ≤0.06%; rated power into 4Ω or 2Ω: ≤1.0%
S/N ratio
1W into 4Ω: >75 dB; rated power into 4Ω: >102 dB (IHF A-wtd, AES-17)
Frequency response
10Hz–400Hz (0 +/-3dB) and 15Hz–325Hz (0 +/-1dB), 1W into 4Ω
Damping factor
>250 (10W into 4Ω at 100Hz)
Input sensitivity
RCA input, rated power into 4Ω: Hi 0.4–10V; Lo 0.1–4.0V
Low pass filter
Variable, 50Hz–400Hz (-24dB/oct.)
Subsonic filter
Variable, 8Hz–40Hz (-24dB/oct.)
Bass EQ
0 to +12dB, variable (fc=50Hz)
Remote level
Linear attenuation, 0 to -20dB (requires optional RUX-KNOB.2)
Inputs
RCA and speaker level
Protection
Thermal protection (zero shut-off)
Construction
Solid cast aluminum body

Questions and answers

What does 750W RMS mean here?
It is the amplifier's continuous power rating, the number that matters for matching a subwoofer. Peak or max figures are marketing numbers and should not guide the match.
Can it power my door speakers too?
No. It is a monoblock, meant for a subwoofer. Door speakers need a separate multi-channel amp or head unit power.
How is it different from the previous R-Series mono amp?
It is smaller, roughly 15% less footprint, and uses a new digital design aimed at holding power without shutting down. Power and control layout carry over in spirit.
What subwoofer should I pair it with?
Match the sub's RMS rating to the amp's 750W RMS at your wiring impedance. A sub rated near that continuous power is the safe target.
Does it need extra cooling?
The digital circuit is built to avoid shutdown at high output, but it still needs airflow. Mount it where it is not sealed in, and keep the terminals clear.
What is in the box?
The amplifier and its mounting hardware and terminal covers. Wiring, fuse holders and a bass knob are not part of the standard kit.
Where is the Alpine Class D Mono Block Car Amplifier 750W RMS Monoblock Amp R2-A75M cheapest?
At eBay, for $391.68, 35% under what the other stores charge, as of our latest check.
Where can I buy the Alpine Class D Mono Block Car Amplifier 750W RMS Monoblock Amp R2-A75M?
13 stores we checked sell it, including JBI PLUS, eBay, Best Buy, Walmart, Crutchfield.

Stores we've priced the Alpine Class D Mono Block Car Amplifier 750W RMS Monoblock Amp R2-A75M at

  • Abt Electronics & Appliances deals and prices
  • Best Buy deals and prices
  • Creative Audio deals and prices
  • Crutchfield deals and prices
  • SonicElectronix.com deals and prices
  • Target deals and prices
  • Walmart deals and prices
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