Power your music
JL Audio’s RD400/4 4-channel amplifier will power each your car’s front and rear speakers with 75 watts RMS, so you’ll hear and feel your music clearly over the whistle of the wind and rumble of the road. For driving bass, you can switch the RD400/4 to 2-channel mode and run a couple of subwoofer with up to 200 watts RMS each.
Low current demand, low distortion, and integrates well
The RD400/4 plays your music with true fidelity and impressive impact, without straining your car’s electrical system, thanks to JL Audio’s proprietary NexD™ amplifier technology. “Differential-balanced” inputs keep the incoming signals clear of outside noise, and allow you to connect this amp to just about any radio. The speaker-level inputs feature two auto turn-on modes so you can readily incorporate this amp into a factory system — no need for RCA connections or a remote turn-on lead for this setup.
LED clip lights and other cool features
High- and low-pass filters help you dial in the perfect tone for your speakers or subs. Onboard LED clip indicators let you set the amp gain quickly and accurately with the use of a test tone. A removable cover hides the amp’s controls, resulting in a handsome appearance and a tamper-resistant installation. Cool blue LED accent lighting adds some charm to this amp’s rugged good looks.
Product highlights:
- Featured in our article: Best 4-channel car amplifiers for 2022
- 4-channel car amplifier
- 75 watts RMS x 4 at 4 ohms (100 watts RMS x 4 at 2 ohms)
- 200 watts RMS x 2 bridged at 4 ohms (4-ohm stable in bridged mode)
- Class D amplifier design with NextD™ switching amp technology
- differential-balanced inputs help eliminate noise
- variable low- and high-pass filters (50-500 Hz, 12 dB/octave)
- LED clip lights help set gain
Other Features:
- blue LED accent lighting
- preamp inputs and outputs
- speaker-level inputs
- 4-gauge power and ground leads and a 40-amp fuse recommended — wiring and hardware not included with amplifier
- no onboard fuses — when installing multiple amps in a system, an additional 40-amp in-line fuse between the distribution block and the amplifier is recommended
- 9-13/16″W x 2-1/8″H x 7″D
- MFR # 98621
What’s in the box:
JL Audio RD400/4 owner’s manual
- 4-Channel amplifier
- 2.5mm Allen wrench
- Self-adhesive JL Audio badge
- Owner’s manual
Prompt Shipping and Professional Packing
Due to our long-term partnership in a long-standing partnership with UPS, FedEx, DHL and many other leading global carriers, we are able to offer various shipping options. Our warehouse employees will pack all goods to our exacting specifications. Before shipping your items will be carefully inspected and secured. We ship to thousands of customers each day across different countries. This demonstrates our dedication to become the biggest online retailer on earth. These warehouses are located in Europe just as they are in the USA.
Note: Orders containing more than one product are assigned a specific processing time, dependent on the particular product.
Before shipping, our team will perform an extensive inspection of the products you ordered. Currently, most orders are delivered within 48 hours. The delivery time is estimated to be between 3 and 7 days.
Returns
Due to multiple parties such as the factory and the warehouse, we cannot fully manage stock. Stocks can be changed at any time. It is possible that inventory could run out once your order has been placed.
Our policy is for 30 days. If you don't receive your item within the 30 days period, we're not able to issue a refund or an exchange.
To be considered eligible for return, it must be unopened and in the condition you received it. The item must be returned in its original packaging.
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