A few decades ago, amplifiers designed for marine applications were not only huge but also inefficient and, crucially, not truly waterproof. Things have come a long way since then, and JL Audio has recently introduced a new series of products specifically for high-performance marine and powersport applications. In this spotlight, we’ll look at the new JL Audio AP600/6 amplifier.
Introducing JL Audio AP Amplifiers
Before we dive into the specifics of the AP600/6, let’s look at the features common to the entire AP Series of products. These amplifiers were designed to provide ultra-reliable performance in marine, powersport and even motorcycle applications. They are completely free of analog controls that might require removable panels or plugs. How did they accomplish this? The amplifiers use a digital signal processor for sensitivity, crossover, bass boost, infrasonic filter, and polarity adjustments. The up and down arrow and Mode/CH buttons on the front panel, combined with a simple dot-matrix display, make it easy for your installer to complete the configuration process. With the amplifier completely sealed, it has an IP67 water and dust intrusion rating.
The AP Series includes four products: the four-channel AP300/4, rated for 50W x 4 into four ohms or 150W x 2 into a pair of four-ohm bridged loads; the monoblock AP300/1, which can deliver 300 watts into a two-ohm load; and the impressive AP600/6, a staggered power six-channel amp. There is also an amp called the AP200/4BT. This amp is rated a 4 x 40 watts into four ohm and includes a BT audio streaming receiver and a controller to adjust volume, track selection or source (BT or Aux input).
JL Audio AP600/6 Specifications
The six-channel AP600/6 is rated to deliver 50 watts per channel into four ohms for the four main outputs and 100 watts per channel to channels five and six. These last two channels can be bridged to provide 300 watts into a single four-ohm load. At 2 ohms, the main channels deliver 75 watts, and channels five and six deliver 150 watts each. The amp isn’t designed to drive a two-ohm load in mono. This is an ideal solution for marine applications with four main speakers and two tower speakers, or could be used with two towers and a subwoofer – just to name a few configurations.
Additional specifications include a CTA-2006-D-compliant signal-to-noise ratio of better than 70 dB when referenced to 1 watt of output from 20 Hz to 20 kHz. Frequency response is listed as being 20 Hz to 20 kHz with a tight tolerance of 1 dB. Idle current is between 1 and 1.5 A, and dark current is specified to be under 1 mA. The six-channel amp has low- and high-voltage signal input ranges that accept 0.2 to 2 or 0.8 to 8 volts RMS.
All three pairs of channels can be run full-range or have high- or low-pass filters applied. The filters in the amp use second-order -12 dB/octave slopes and are adjustable from 20 to 500 Hz. The bass boost is centered nice and low at 37 Hz and can boost around this frequency by up to 18 dB. The AP600/6 has an adjustable infrasonic filter on channels five and six that’s adjustable from 20 to 50 hertz with a second-order slope. This amp doesn’t have a polarity reverse adjustment in the menu.
The amp has an Easy Tune mode that allows it to work with select Fusion source units with DSP and the Fusion Audio smartphone app.
Connections and Installation
Electrical connections are on pigtails at either end of the amp. The left side has six pairs of 18-AWG speaker-wire connections, along with a remote turn-on connection and an 8-AWG connection. These connections are 10 inches long. The right side has three pairs of RCA jacks and a factory service USB port connection. The amp doesn’t have a built-in over-current protection device, so your installer should install a 70-amp fuse on the end of the power wire. Four-AWG should be run to the battery connections to ensure efficient operation.
Footprint-wise, the AP600/6 measures 11.81 inches (30 cm) long, 5.9 inches (15 cm) wide, and is 1.86 inches (4.7 cm) thick. These dimensions exclude the wires and their injection-molded strain reliefs. The amp mounts using the provided M4 x 35mm (approx. #8 x 1-3/8) fasteners that pass through the corners of the cast aluminum heatsink.
Upgrade Your Marine or Powersports Application with JL Audio AP-Series Marine Amps Today!
Whether you are shopping for a small amp with a Bluetooth receiver to power a system in your fishing boat, or you want a higher-power solution like the AP600/6 for a small cruiser, the new AP Series of amplifiers from JL Audio should have what you need. Drop by a local authorized retailer today. You can find out more about the AP Series amplifiers by visiting the Garmin website.
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