MB Quart NA4-500.5 Nautic 500 Watt Waterproof 5 Channel Amplifier
MB Quart NA4-500.5 Nautic 500 Watt Waterproof 5 Channel Amplifier is backordered and will ship as soon as it is back in stock.
Shipping & delivery
Usually ships in 2–3 business days unless a different lead time is shown on this page. Shipping cost is calculated at checkout (UPS or USPS to the contiguous U.S.).
Shipping policy · Returns · Fitment questions? (561) 207-7988
Delivery and Shipping
Delivery and Shipping
Standard order processing is 2–3 business days unless this product or your order confirmation states a different lead time. Custom-built, made-to-order, backorder, and pre-order items follow their stated lead times.
Enclosures and subwoofer boxes ship for $50 per unit. Other shipping charges are calculated at checkout. Orders outside the contiguous 48 United States may require additional shipping; we will contact you for approval before shipment.
Subwoofer boxes ship UPS Ground where available. Read our Shipping Policy and Return and Refund Policy for delivery, product-specific return windows, and warranty details.
MB Quart NA4-500.5 Nautic 500 Watt Waterproof 5 Channel Amplifier is backordered and will ship as soon as it is back in stock.
Description
Description
MB Quart NA4-500.5 Nautic is a compact 500 watt five channel powersports amplifier built for marine and off-road use. Its potted internals and IP67 waterproof and dustproof rating seal the components against moisture, while quick release power and RCA connections keep wiring simple.
The Q-Stasis preamplifier stage cuts incoming noise, and the full range Class D topology with a PWM MOSFET power supply delivers stable power from a small aluminum heatsink. Four channels plus a dedicated subwoofer channel, dial-switch crossover control, and the included wired bass remote let you tune the system from anywhere in the vehicle.
| Brand | MB Quart |
| Model | NA4-500.5 |
| Series | Nautic |
| Type | Amplifier |
| Category | Marine, Powersports |
| Condition | New |
| Color | Black |
| Model Replaced | NA2-500.5 |
| Warranty | 1 Year |
| IPX Rating | IP67 |
| Compatible Vehicles | Universal |
| Amp Class | Full Range Class D |
| Amp Total Channels | 5 |
| Amp Max Power (watts) | 500 |
| Amp Power @ 2 Ohms (ch x watts) | 4 x 80 + 1 x 200 |
| Amp Power @ 4 Ohms (ch x watts) | 4 x 40 + 1 x 100 |
| Amp Crossover | Electronic |
| Amp Variable High Pass Crossover 12dB per Octave | CH1 & CH2: Switched Fixed HPF 80Hz/Off, CH3 & CH4: Switched Fixed HPF 80Hz/Off, CH5: 15Hz-50Hz |
| Amp Variable Low Pass Crossover 12dB per Octave | CH5: LPF 50Hz-150Hz |
| Amp Subsonic Filter | 15Hz-50Hz |
| Amp Variable Voltage | 0.2-9V |
| Amp Signal to Noise | > 90dB |
| Amp Frequency Response | CH1-4: 20Hz-20KHz + CH5: 15Hz-150Hz |
| Amp Total Harmonic Distortion (THD) | <0.5% |
| Amp Speaker Level Audio Inputs | RCA |
| Amp Power Terminal 12v/GND | 12 AWG Quick Connector |
| Amp Speaker Terminal Wire Gauge | Molex Plug Connector |
| Amp Fusing | 40A x 1 |
| Weight | 4.25 lbs |
| Dimensions | 14.25 × 6.75 × 3.25 in |
| Item Weight (lbs) | 3.3 |
| Item Length (in) | 9.85 |
| Item Width (in) | 3.94 |
| Item Height (in) | 1.77 |
Fitment & installation
Fitment & installation
Check the selected part against your vehicle. Need help? Call (561) 207-7988.
Selected part: 806576238263
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Read FOX’s application notes for part 987-24-001 (rear shock)
Payment & Security
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