Like New (Open Box) - JL Audio RD400/4 Class D RD Series 4 Channel Car Amplifier (Open Box, Like New)

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Product highlights

• 75 watts x 4 channel @ 4 ohm
• 100 watts x 4 channel @ 2 ohm
• Bridged: 200 watts x 2 channel @ 4 ohm
• Total RMS Power: 400 watts
• Class D 2 ohm Stable 4-Channel Amplifier

Learn more about the rd4004_obn

Description

Authorized dealer

Item Condition - Like New (Open Box):

This product works and looks like new. It may have been opened for a visual demo or product video. In some cases there may be signs of an attempt at installation like opened packaging or mounting screw holes used, but there is no real sign of use or wear. Includes all original parts, packaging and accessories (or suitable replacement)

JL Audio RD400/4

400W RMS Class D RD Series 4 Channel Car Amplifier
Quantity: 1

Product Details:

RD Series Class D 2 ohm Stable 4-Channel Amplifier
RMS Power Rating:

4 ohm: 75 watts x 4 channel
2 ohm: 100 watts x 4 channel
Bridged: 200 watts x 2 channel @ 4 ohm

Total power output: 400 watts
Onboard LED clipping indicator rings
1 pair of preamp output
Speaker-level (high-level) inputs (Requires adapter like the JL Audio XD-CLRAIC2-SW)
Signal sensing remote turn-on
NextD switching amplifier technology
Differential-balanced inputs help eliminate noise
Advanced Rollback Protection System prevents thermal shut-down
Input sensitivity:

Low level: 200mV - 2 volts
High level: 800mV - 8 volts

Frequency Response: 12 - 22000 Hz
Total Harmonic Distortion (THD): <1%
Signal to Noise Ratio: >104 dB
Variable high-pass filter: 50 - 500 Hz
Variable low-pass filter: 50 - 500 Hz
Fuse Rating: 40A (AFS, AGU or MaxiFuse)
4 AWG gauge amplifier wiring kit is recommended for installation
Dimensions: 9.78" L x 6.96" W x 2.13" H
Authorized Internet Dealer
2 Year Manufacturer's Warranty
MFR #: RD400/4

Specifications & Details

Key Features

Amplifier Key Features

Compact Design
Speaker Level Inputs

Power Specifications - Full Range Channels

RMS Power @ 4 ohms

75 watts x 4 channel

RMS Power @ 2 ohms

100 watts x 4 channel

Bridged RMS Power

200 watts x 2 channel

Amplifier Specifications

Series

RD Series

Amplifier Class

Number of Channels

4-Channel

Total RMS Power Output

400 watts

Maximum Input Gauge Size

4 AWG

Minimum Impedance Unbridged

2 ohm

Minimum Impedance Bridged

4 ohms

Frequency Response

12 - 22000 Hz

THD at Rated RMS Power

<1%

Speaker Level Inputs

Yes

Preamp Outputs

1 pair

Built-in Crossover

Low-Pass (LP)
High-Pass (HP)

High-Pass Crossover Frequency

50 - 500 Hz

Low-Pass Crossover Frequency

50 - 500 Hz

Signal-to-Noise Ratio

>104 dB

Remote bass/level controller

Fuse Rating

40A x 1

Total Fuse Rating

Strappable

Sonic Certified Amplifier

Yes

Amp Bluetooth Connectivity

Hi-Res Certified

Low-Level Input Sensitivity

200mV - 2 volts

High-Level Input Sensitivity

800mV - 8 volts

What is in the box?

Paperwork

User manual
Warranty/Registration card

WITB: Amplifiers

Amplifier
Adhesive brand badge
Allen wrench

Warranty and Return Policy

Parts Warranty Duration

1 year

Labor Warranty Duration

1 year

Warranty Provider

Manufacturer

Customer Ratings & Reviews

JL Audio RD400/4 (Open Box, Like New) thumbnail image

Overall rating distribution

5 star		96%
4 star		4%
3 star		0%
2 star		0%
1 star		0%

Filter by Star Rating

Show only Verified Purchases

By feature average rating

Durability		4.9
Value		4.9
Features		5
Design		5
Usability		5

Customer Photos & Videos

Customer Reviews

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Great Deal on a great product

The following review is for RD400/4, which is a part of the bundle you are viewing.

I could not be happier with this amp. True quality from top to bottom. The sound is fantastic. I used this as a full range four channel amp to drive four kicker speakers. It gets its signal from the factory Nissan HU which is a very low quality HU in my opinion. I decided to try to keep the factory HU due to the factory steering wheel controls, bluetooth and stock look for theft deterrent appearance. I found the front channels on the HU clipped out way early compared to the rear when setting up the amp. So i switched the amp to 2 channel input / four channel output the set it up with the clip lights ....and perfection! What a great feature. I am very happy.

By Gerry on March 16, 2017 Checkmark Icon

Verified purchase

49 found this helpful

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Great Product

The following review is for RD400/4, which is a part of the bundle you are viewing.

Pros: Easy to install, all the needed features, underrated.

Cons:None.

By Dustin on February 8, 2018 Checkmark Icon

Verified purchase

46 found this helpful

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Amp

The following review is for RD400/4, which is a part of the bundle you are viewing.

Very pleased so far.. sounds just as my amp that I replaced.. easily installed, with a very small space required for installation... don't know about durability yet.. but we will see.. for the $$ and power/size ratio I would recommend this amp to anybody.. JL makes some of the best

By Marc on September 24, 2017

42 found this helpful

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Nice

The following review is for RD400/4, which is a part of the bundle you are viewing.

Very good sound quality amp and small enough to put under the seats

By Anonymous on March 30, 2019 Checkmark Icon

Verified purchase

42 found this helpful

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JL Audio Class-D 4-Channel RD400/4

The following review is for RD400/4, which is a part of the bundle you are viewing.

Great prices on great equipment and Fast delivery thanx sonic

By Anonymous on March 6, 2019 Checkmark Icon

Verified purchase

41 found this helpful

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Excellent app at a great price. Fast delivery also!

The following review is for RD400/4, which is a part of the bundle you are viewing.

I needed the amp I bought quickly and Sonic Electronix was the only company that had it in stock and at the right price.

Great amp, shipped fast. 100% satisfied.

By David on August 7, 2020 Checkmark Icon

Verified purchase

40 found this helpful

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JL Audio Class-D 4-Channel RD400/4

The following review is for RD400/4, which is a part of the bundle you are viewing.

I would recommend this amp it sounds so clean!!!! I have it running 4 6.5 Phoenix gold coaxal speakers I have had this amp for 6 months and works perfectly.

By Anonymous on December 14, 2018

40 found this helpful

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Excellent price Great power

The following review is for RD400/4, which is a part of the bundle you are viewing.

This amp was a great price and I love the convenience in size. I replaced my factory amp and the Boston acoustic speakers now sound like high-end audio. Very easy to install and with the new clipping feature I have no issues. Will be buying another soon.

By Christopher on March 19, 2020 Checkmark Icon

Verified purchase

39 found this helpful

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Open box saved me $70

The following review is for RD400/4, which is a part of the bundle you are viewing.

JL lives up to their reputation again. Replaced my kicker 4 channel with this amp. A smaller footprint operates at a cooler temperature, and all of the wirings is on one side for cleaner wire installation.

By Christopher on January 24, 2021 Checkmark Icon

Verified purchase

34 found this helpful

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Sounds good for the money

The following review is for RD400/4, which is a part of the bundle you are viewing.

Using this in conjunction with an RD1500 in a regular cab Silverado. Not yet installed but it is running on my test bench on a set of Kicker's bookshelf demo speakers. Good, clean sound and plenty of power while running in 2 channel mode.

Shipping and customer service experience was not what I expected; both were slower than promised. Product is great.

By Ryan on November 24, 2021 Checkmark Icon

Verified purchase

33 found this helpful

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