Description
Included in this kit
This bundle includes a JL Audio AP300/4 - 4-Channel Compact 300-Watt Marine Amplifier, and a JL Audio 7.7-Inch M6 ETXv3 Tower Speaker, RGB LED, Gunmetal & Titanium, Sport Grille - SKU: M6-770ETXv3-Sb-S-GmTi-i.
1x JL Audio AP300/4 - 4-Channel Compact 300-Watt Marine Amplifier - (AP300/4)
JL Audio AP300/4 – 4-Channel Class-D Marine Amplifier
The JL Audio AP300/4 is a compact 4-channel Class-D amplifier from the AP marine series, designed to deliver up to 300 watts of clean, efficient power in a small, IP67-rated chassis. It can drive multiple pairs of full-range speakers or a mix of speakers and a subwoofer using its flexible bridging and onboard crossovers, making it ideal for small to mid-size boats and powersports builds where space and reliability are critical.
Compact Class-D Power for Multiple Zones
As the 4-channel model in the AP lineup, the AP300/4 is engineered to power up to four pairs of speakers or a combination of two pairs of speakers and a subwoofer using bridged channels. Its efficient Class-D topology delivers strong output while minimizing battery drain, a key advantage on marine and powersports electrical systems.
At 14.4 V and less than 1% THD, the AP300/4 is rated for 50 watts x 4 into 4 ohms or 75 watts x 4 into 2 ohms. For higher-output configurations, channels can be bridged to provide 150 watts x 2 into 4 ohms, giving you flexibility in how you allocate power between full-range zones and low-frequency channels.
- 4-channel Class-D amplifier designed for full-range or mixed speaker/subwoofer systems.
- Rated continuous power of 50 W x 4 @ 4 Ω or 75 W x 4 @ 2 Ω (14.4 V, <1% THD).
- Bridged output capability of 150 W x 2 @ 4 Ω for higher-output speaker or subwoofer channels.
- Full-range frequency response from 20 Hz–20 kHz (+0, -1 dB) for clear, wide-band audio.
- Signal-to-noise ratio >70 dB (A-weighted, 20 Hz–20 kHz, referred to 1 W) for low-noise performance.
LCD On-Amp Control, Easy Tune & Marine Durability
A built-in LCD display gives you direct access to key amplifier settings at the amp itself, simplifying setup and adjustments during installation or service. For further optimization, the AP300/4 supports JL Audio’s Easy Tune feature when paired with a compatible Fusion® stereo that has built-in DSP and the Fusion® Audio app, allowing quick, profile-based setup to help protect speakers and maintain consistent system tuning.
Designed for harsh marine environments, the amplifier chassis carries an IP67 water and dust rating (excluding cables) and is ignition protected. Its compact footprint and low idle current draw make it easy to mount and integrate in tight compartments without putting unnecessary strain on the battery system.
- Built-in LCD display for manual control and amplifier setup right on the unit.
- Easy Tune feature supported when used with Fusion® stereos with DSP and Fusion® Audio app.
- IP67-rated amplifier chassis (excluding cables) for water and dust resistance.
- Ignition protected design for use in appropriate marine engine compartments.
- Physical dimensions: 1.86" (H) x 10.43" (W) x 4.90" (D) / 47 x 265 x 125 mm.
| Part Number | 010-03429-00 (AP300/4, 4-channel model) |
| Channels | 4-channel |
| Amplifier Class | Class D |
| Operating Voltage | 9–16 VDC |
| Water/Dust Rating | IP67 (amplifier chassis, excluding cables) |
| Operating Temperature | 4° to 149°F (-20° to 65°C) |
| Rated Power @ 4 Ω (14.4 V) | 50 W x 4 / 150 W x 2 bridged (<1% THD) |
| Rated Power @ 2 Ω (14.4 V) | 75 W x 4 (<1% THD) |
| Frequency Response | 20 Hz – 20 kHz (+0, -1 dB) |
| Signal-to-Noise Ratio | >70 dB (A-weighted, 20 Hz–20 kHz, referred to 1 W) |
| Standby Current | <1 mA |
| Idle Current | Approximately 700–750 mA |
| Fuse Rating | 35 A (AFS, AGU, or MaxiFuse™ recommended) |
| Minimum Power/Ground Wire | 4 AWG copper wire |
| Protection Circuits | Input under/over voltage, over-temperature, output short circuit |
| Amplifier Dimensions (H x W x D) | 1.86" x 10.43" x 4.90" (47 x 265 x 125 mm) |
| Warranty | 3 years |
| High-Pass / Low-Pass Filters | Yes – full-range filters, user selectable |
| Filter Modes – Channels 1 & 2 | Off, High-pass (HP) or Low-pass (LP) |
| Filter Modes – Channels 3 & 4 | Off, High-pass (HP) or Low-pass (LP) |
| Filter Slope | 12 dB/octave (all channels) |
| Filter Frequency Range | 20 Hz – 500 Hz (HP or LP, channels 1–4) |
| HP Variable Crossover | Yes – 4-channel, 12 dB/octave |
| LP Variable Crossover | Yes – 4-channel, 20–500 Hz |
| Bass Boost EQ | 0 to +18 dB @ 37 Hz |
| Input Sensitivity | RCA inputs switchable: 200 mV–2 V RMS (Low), 800 mV–8 V RMS (High) |
| Input Impedance | 11 kΩ (High), 20 kΩ (Low) |
- JL Audio AP300/4 4-channel marine amplifier
- Four amplifier mounting screws
- Documentation and installation information
1x JL Audio 7.7-Inch M6 ETXv3 Tower Speaker, RGB LED, Gunmetal & Titanium, Sport Grille - SKU: M6-770ETXv3-Sb-S-GmTi-i - (M6-770ETXv3-Sb-S-GmTi-i)
JL Audio M6-770ETXv3-Sb-S-GmTi-i
JL Audio 7.7-Inch M6 ETXv3 Tower Speaker, RGB LED, Gunmetal & Titanium, Sport Grille - SKU: M6-770ETXv3-Sb-S-GmTi-i
Clamps sold separately - Click HERE to find the perfect size for your application.
M6 Loudspeakers fulfill JL Audio’s commitment to raise the bar with each product generation. The JL Audio engineering team has completely reinvented the premium marine loudspeaker, with major improvements in performance, precision and durability. Offered in multiple sizes and cosmetic options, most models are also available with a brilliant, new lighting technology.
Coaxial Speaker Technology
Every M6 coaxial loudspeaker starts with a long-excursion woofer designed with JL Audio’s proprietary motor, suspension and cone modeling systems to yield superior frequency response, smooth mid-range dispersion and linear performance at all listening levels. JL Audio’s acoustics laboratory in Miramar, Florida performs extensive testing on multiple generations of prototypes to refine every design and extract maximum performance.
Matching Silk-Dome Tweeters
Since the different size woofers in the M6 coaxials have different upper frequency response limits, each size pairs with its own specially designed, matching silk dome tweeter (0.8, 1.0, or 1.25-inch diameter). Each of these tweeters is precisely tuned via a rear cavity that optimizes its mid-range extension to seamlessly transition with its matching woofer. The result is smooth, evenly dispersed sound throughout the critical crossover region, making the overall sonic presentation clean and clear.
Advanced Built-In Crossover Networks
Crossover networks are a critical part of the M6 coaxial speakers’ acoustic design and are considerably more sophisticated than those used in most marine coaxial speakers. The M6-650X employs a 1st order low-pass and 2nd order high-pass filter, while the M6-770X and M6-880X apply a 2nd order low-pass and 3rd order high-pass filter. Each crossover network also employs an electronic tweeter protection circuitto minimize the possibility of tweeter failure.
The multiple components required inthese crossovers are laid out on a ring-shaped circuit board that is built into each speaker’s terminal assembly, ensuring that the crossover is secure and protected from the elements.
Transflective™ LED Illumination
Optional on most M6 models is JL Audio’s Transflective™ LED technology. By emitting light from multiple LEDs through our specially engineered cone material, this patent-pending breakthrough delivers a beautiful cone illumination effect, with no hot spots or reflections on the cone surface.
Choose from seven fixed lighting colors or control the color and intensity of the lighting actively using a lighting controller accessory (sold separately). Separate 12V wiring is required to power the illumination.
General Specifications
| Mounting Application | Tower |
| Continuous Power Handling (RMS) | 100 W |
| Recommended Amplifier Power (RMS) | 40 - 200 W / Ch. |
| System Efficiency | 91 dB @ 1 W / 1 m |
| System Nominal Impedance | 4 Ω |
| System Frequency Response | 45 Hz - 25 KHz ± 3 dB |
Physical Specifications
| Enclosure Diameter (A) | 7.70 in / 196 mm |
| Enclosure Depth (B) | 12.62 in / 321 mm |
| Height including Mounting Clamp Receiver* (C) | 8.74 in / 222 mm |
| Mounting Clamp Receiver / Enclosure Offset (D) | 1.04 in / 26 mm |
Wiring Harness Info
| 16 AWG Red/Stripe | Speaker Positive (+) |
| 16 AWG Black/Stripe | Speaker Negative (-) |
| 20 AWG Yellow | Main RGB LED Positive (+12V) |
| 20 AWG Red | Red RGB LED Negative (-) |
| 20 AWG Green | Green RGB LED Negative (-) |
| 20 AWG Blue | Blue RGB LED Negative (-) |
Pipe Clamps
Most Commonly Used Clamps - These are sold separately and not included in this product on it's own.
Want to view all the ETXv3 mounting adapters?Click HERE to find the perfect mount for your application.
Need help determining the correct Pipe-Mounting Clamp for your installation?
Download the Pipe-Mounting Clamp Ruler.