JL Audio HX300/1 Get FREE Amp Kit

Compact Full-Range Class D Mono Amplifier 300W

Engineered specifically for powersports applications, the HX300/1 monoblock amplifier employs our high-speed NexD™ switching design to pack a serious full-range punch, without straining charging systems. Its tiny, cast aluminum chassis is highly resistant to corrosion, with an IPX6 water-resistance rating, making it perfect for motorcycles, ATV’s or other utility vehicles. With a robust 300W of clean power into a 2-ohm load (14.4V, 1% THD), use one to drive a subwoofer, or grab a pair to deliver stunning output to a subwoofer system or full-range satellites.

The HX300/1 also features an adjustable low-pass crossover, a bass boost EQ, variable infrasonic filter and output polarity switch. Its dual-range input section accepts a wide range of input voltage levels, from line-level all the way to high-power speaker level signals. With the addition of an M-RBC-1 remote level control (sold separately), subwoofer output can be directly controlled from the driver’s seat.

This amplifier features a black powder-coated finish, a gasketed cover for the controls and stainless steel hardware for durability.

General Features:

Monoblock Class D Full Range Amplifier
RMS Power Rating @ 14.4 V:
4 ohms: 160 watts x 1 chan.
3 ohms: 220 watts x 1 chan.
2 ohms: 300 watts x 1 chan.
1 ohms: N/A
RMS Power Rating @ 12.5 V:
4 ohms: 160 watts x 1 chan.
3 ohms: 200 watts x 1 chan.
2 ohms: 250 watts x 1 chan.
1 ohms: N/A
4 ohms: 158 watts x 1 chan.
3 ohms: 271 watts x 1 chan.
2 ohms: 354 watts x 1 chan.
Variable Bass Boost: 0 to +12 dB bass boost at 43Hz
Variable low-pass filter: 40 - 400 Hz, 24 dB/octave
Frequency Response: 20 - 12,000 Hz
Total Harmonic Distortion (THD): <1.0%
Signal to Noise Ration: 85 dB
Subsonic filter: 20 - 40 Hz
Selectable phase: 0 / 180°
Fuse Rating: 30A x 1
Dimensions: 8.66"W x 3.09"D x 1.77"H
8 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier.
NexD™ ultra-high-speed switching design
Black powder-coated finish
Gasketed cover for the controls
Stainless steel hardware for durability
IPX6 water-resistance rating
M-RBC-1 remote level control (sold separately)
Controls bass levels only
LED power (green) and protect (red) indicators
Accepts RCA (low-level) & Speaker-level (high-level) signal
Switchable Input sensitivity: 250 mV-4 V (Low) to 750 mV-15 V (High)