Description
Included in this kit
This bundle includes a JL Audio RD400/4 Class D 4-Channel Full-Range Amplifier, and 2x JL Audio C5-570x:5 x 7 / 6 x 8-inch (125 x 180 mm) Coaxial Speaker System (Pair).
1x JL Audio RD400/4 Class D 4-Channel Full-Range Amplifier (RD400/4)
RD400/4
4-Channel Class D Full-Range Amplifier, 100 W x 4 @ 2 Ω / 75 W x 4 @ 4 Ω - 14.4V
Utilizing our exclusive NexD™ high-speed switching technologies, the ultra-compact RD400/4 amplifier is engineered to deliver loads of audio output power, with incredible efficiency and low distortion. Don’t let its modern styling and small size fool you though, this little powerhouse churns out 100 watts of crystal-clear audio from each of its four channels into 2 ohms (14.4V, 1% THD) and is fully bridgeable, so it can be used as a 3-channel amplifier, or as a 2-channel amplifier producing a whopping 200W x 2 into 4 ohms.
For your convenience, the RD400/4’s controls can be found on top of the amplifier, beneath a protective cover, with all connections located along one side of its chassis. Studio-grade signal processing features include high or low-pass 12 dB / octave filters (defeatable) for each channel pair, with continuously variable frequency selection from 50-500 Hz, and dual-range, differential-balanced inputs capable of accepting most input voltage levels. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard equipment, along with all-new input type switches for bridging of stereo output channels without needing to use Y-adaptors.
Onboard LED-clipping indicators are also included with your RD400/4. This all-new, innovative feature lets you easily set your amplifier’s input sensitivity settings, quickly and accurately, with no special equipment needed. You’ll also find a set of preamp outputs on-hand, so you can pass signals to another amplifier, almost effortlessly. The RD400/4 features a durable, black powder-coated finish and a top-mounted, dual-color LED light strip that reports the overall status and condition.
Rated Continuous (RMS) Power @ 14.4 V
| @ 4 Ω | 75 W RMS x 4 |
| @ 3 Ω | 100 W RMS x 4 |
| Bridged @ 4Ω | 200 W RMS x 2 |
Rated Continuous (RMS) Power @ 12.5 V
| @ 4 Ω | 60 W RMS x 4 |
| @ 3 Ω | 90 W RMS x 4 |
| Bridged @ 4Ω | 180 W RMS x 2 |
General Specifications
| Frequency Response | 12 Hz - 22 kHz (+0, -1dB) |
| S/N Ratio, referred to highest rated power | >104 dB below rated power (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| S/N Ratio, referred to 1 W | >84 dB (A-weighted, 20 Hz - 20 kHz noise bandwidth) |
| Damping Factor @ 4 Ω | >150 / 50 Hz |
| Damping Factor @ 2 Ω | >75 / 50 Hz |
| THD+N @ Rated Power | <1% @ 2 Ω per Ch. |
| Input Voltage Range @ RCA Inputs | Switchable from 200 mV - 2 V RMS (Low) to 800 mV - 8 V RMS (High) |
| Min.Copper Power / Ground Wire Gauge | 4 AWG wire |
| Fuse Rating | 40 A (AFS, AGU or MaxiFuse™) |
Signal Processing
| Filter Mode(s) | Low-Pass or High-Pass |
| Filter Slope(s) | 12 dB/octave |
| Filter Frequency Range | 50 Hz - 500 Hz |
| Detented, Calibrated Filter Freq. Potentiometers | No |
| Filter Defeat Function | Yes |
| Remote Level Control | No |
| Remote Level Modes | N/A |
| Channel Input Mode Switch | Yes (2/4 ch.) |
| Pass-Through Preamp Output | Buffered |
| Source Channel Selection for PreOuts | No |
Physical Specifications
2x JL Audio C5-570x:5 x 7 / 6 x 8-inch (125 x 180 mm) Coaxial Speaker System (Pair) (C5-570x)
JL Audio C5-570x: 5 x 7 / 6 x 8-inch (125 x 180 mm) Coaxial Speaker System
Coaxial Speaker System: 5 x 7 / 6 x 8-inch (125 x 180 mm) Woofer, 0.75-inch (19 mm) Silk Dome Tweeter
Many people mistakenly believe that an oval speaker cannot perform as well as a round one, leading to many instances of 5.25-inch speakers being installed into 5 x 7-inch openings. JL Audio's engineers have put in the time and effort to create fantastic-sounding speakers that drop into oval openings and deliver equivalent performance to our 6.5-inch (165 mm) round speaker systems... guaranteed. So, don't make the mistake of losing cone area and efficiency by stepping down to a smaller round speaker... these ovals rock.
In the C5-570x coaxials, the smoothness and transparency of a high-end silk dome tweeter combines with top-flight woofer performance to create a loudspeaker system with exceptional refinement and dynamic capability.
The C5-570x system features 5 x 7 / 6 x 8-inch (130 mm) woofers with die-cast alloy baskets and Kurt Müller cones and suspensions. The woofer benefits from JL Audio's vast woofer design experience and advanced modeling systems.
Tweeters are coaxially mounted and built with 0.75-inch silk dome diaphragms that deliver smooth, extended response, on and off axis. The small size of the C5 tweeter minimizes tweeter protrusion, allowing C5 coaxials to easily fit behind most factory speaker grilles.
C5 crossover networks are compact and built with premium component parts, including Mylar® capacitors and segmented air-core inductors. Four levels of tweeter attenuation are provided, as well as three levels of mid-range presence adjustment, for twelve possible voicing combinations!
No speaker grilles are included (or available) for this system.
Sonic character: Smooth and balanced
Made in Germany, Sold as a pair.