Skar Audio RP-800.1DM 800 Watt Monoblock Class D Marine Subwoofer Amplifier
Quick take
The Skar Audio RP-800.1DM is a 1-ohm stable marine Class D monoblock designed to deliver strong low-end power for subwoofer builds on boats and UTVs. Buyers tend to highlight its punchy bass output, straightforward setup, and marine-friendly build. The main caveat is matching your subwoofer wiring and impedance correctly, since performance and safety depend on running the intended load.
Pros and cons
Pros
- 1-ohm stable design with rated 800 watts RMS at 1 ohm (peak listed at 1,200 watts)
- Marine-focused construction, including waterproof coating on the circuit board and rust-resistant mechanical case
- Onboard tuning controls plus a bass EQ switch (+6 or +12dB at 45 Hz)
- Remote subwoofer level control (bass knob) included
- 4-way protection and heavy-duty 4-gauge power and ground terminals for current flow
Cons
- You will need to plan wiring and sub load (it’s designed to be stable at 1 ohm, but improper load matching is a common installation problem)
- If you are sensitive to heat, placement and ventilation still matter, even with its efficient heatsink design
What buyers think
Buyer-review evidence is fairly consistent around a few decision factors. Many users mention that bass output is noticeably stronger when this amp is added to their existing setup, and they describe the sound as tight and impactful when the system is matched correctly. Setup is commonly described as straightforward, with installation and basic tuning feeling manageable. Several comments also specifically mention marine or wet-environment use, with users reporting no trouble from getting the amp wet and no heat-related problems during real-world operation.
That said, review evidence is limited in detail around long-term failure rates or how it performs across every boat and wiring scenario, so installation quality and correct impedance matching are still the biggest variables to watch.
Key features that matter for marine bass
Marine build aimed at harsh environments
This monoblock is designed for marine use, with a waterproof coating on the circuit board and rust-proof painting on the mechanical case. For buyers, that means the amp is built with the expectation of moisture exposure where standard electronics can struggle.
Power and stability for subwoofer setups
The RP-800.1DM is rated for 800 watts RMS at a 1-ohm load, with peak power listed at 1,200 watts at 1 ohm. It is also advertised as stable at 1 ohm, which gives you more flexibility when choosing subwoofer configurations, as long as the final load stays within the intended range.
Onboard bass tuning plus EQ boost
You get an onboard user control panel that includes a bass EQ switch with +6 or +12dB boost at 45 Hz. There are also variable adjustments for gain level, low-pass filter, and subsonic filter, which helps you shape the bass for your specific sub, enclosure type, and listening preference.
Remote bass knob for day-to-day control
A remote subwoofer level control is included, so you can adjust bass from anywhere on the watercraft without reaching for the amp. This is especially useful when you are switching between cruising and anchoring, or when passengers have different volume preferences.
High-current wiring support and protection
The amp uses 4-gauge power and ground input terminals to support strong current flow. It also includes 4-way protection circuitry, aimed at reducing the risk of damage from issues such as electrical shortage, overheating, low voltage, and related faults.
Installation and setup considerations (where buyers win or struggle)
- Match your sub load correctly. The amp is designed to be stable at 1 ohm, but impedance mismatches can cause problems or limit performance. Plan your wiring (series/parallel) around the load the amp expects.
- Set your crossover and EQ thoughtfully. The low-pass filter and subsonic filter help keep bass from getting muddy, especially in sealed vs. ported enclosures. Use the EQ switch as an adjustment tool, not a substitute for dialing in the system.
- Grounding matters, especially with multiple audio components. Some buyers recommend using grounding solutions like loop isolators when integrating with other amps, which is a practical reminder to pay attention to system grounding to avoid noise.
- Placement still affects heat. Even with an efficient heatsink design, safe operation depends on installation. Choose a spot that supports airflow and keep wiring tidy to reduce stress points.
Pros and cons summary
If you want a marine monoblock that focuses on power, onboard tuning, and moisture-aware construction, the RP-800.1DM is an easy category fit. Buyers also seem to appreciate that it can deliver strong bass output without requiring complicated setup. The biggest “make or break” factor is pairing it correctly with your subs and wiring so the amp can operate as intended.
Who it’s best for
- Boat and UTV owners building (or upgrading) a subwoofer stage and want a marine Class D monoblock
- Buyers who want remote bass level control plus onboard EQ and filter adjustments
- People comfortable planning wiring around amplifier stability at 1 ohm
Who should consider other options
- Shoppers who want plug-and-play with no planning for impedance, enclosure, and crossover settings
- Anyone whose installation space makes proper heat management difficult
Price and availability
Check current pricing and stock status using the button below, since marine amplifier prices can change based on retailer and listing conditions.
FAQ
Is the Skar Audio RP-800.1DM stable at 1 ohm?
Yes. It is advertised as stable at a 1-ohm load, with rated output listed for 1 ohm.
What controls does this amplifier include?
It includes onboard tuning controls for gain level, low-pass filter, and subsonic filter, plus a bass EQ switch (+6 or +12dB at 45 Hz). A remote subwoofer level control (bass knob) is included as well.
Is this a true marine amplifier?
It is designed for marine use, with waterproof coating on the circuit board and rust-proof painting on the mechanical case.
What power rating should I expect?
The amplifier is conservatively rated at 800 watts RMS at 1 ohm, with peak power listed at 1,200 watts at 1 ohm.
Do I need a specific wiring setup for my subs?
You should wire and configure your subwoofers to match the amplifier’s intended load behavior. If you are unsure, plan your series and parallel wiring based on the impedance you want to run.
Will it still work if it gets wet?
The amp uses a marine-focused design intended to handle moisture exposure, including waterproofing on the circuit board and rust-resistant coating on the case. Proper installation and protection from standing water still matter.
Does it include protection circuits?
Yes. It features 4-way protection circuitry, intended to protect against issues such as electrical shortage, overheating, and low voltage.
Specifications
| Product Title | Skar Audio RP-800.1DM 800 Watt Monoblock Class D Marine Subwoofer Amplifier |
|---|---|
| Category | Electronics > Car & Vehicle Electronics > Marine Electronics > Marine Amplifiers |
| Brand | Skar Audio |
| Manufacturer | Skar Audio |
| Model Number | RP-800.1DM |
| Item Weight | 7.3 Pounds |
| Mfr Part Number | RP-800.1DM |
| Warranty Description | 2 year limited warranty |
| Item Type Name | Marine Amplifier |
| Built-In Media | Skar Audio RP-800.1DM Marine Monoblock Amplifier, 800W |
Available variants
Size
- 800 Watt Class D Monoblock
- 1000 Watt Full-Range Class A/B 4-Channel
- 1500 Watt Class D Monoblock
- 500 Watt Full-Range Class A/B 4-Channel
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