Kenwood Excelon XM502-1

Features

CTA-2006 Compliant: CTA-2006 is a system of testing and measurement for mobile audio amplifiers. This voluntary standard advocates a uniform method for measuring an amplifier's RMS power output and signal-to-noise ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and the RMS power output is measured over a frequency range of 20 Hz to 20 kHz (for full range amplifiers) with 1% or less Total Harmonic Distortion plus noise (THD+N). Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4Ω. CTA-2006 standards allow consumers to compare amplifiers and receivers under the same conditions (apples to apples).

CTA-2006 Specifications:

• Power Output: 300 watts RMS x 1 (20-200 Hz) into 4Ω
• Signal to Noise Ratio: 85 dBA (measured at 1 watt into 4Ω)

Other Specifications: (not using the CTA-2006 criteria)

• Power Output: 500 watts RMS x 1 (100 Hz, 14.4 volts, ≤1.0% THD)
• Signal to Noise Ratio: 100 dB (at rated power output)

Class D Amplifier Design: The amplifier design is Class D, which uses digital switching power supplies. The result is a more efficient amplifier, generating less heat than Class AB amps of equal power. The Class D design also allows the amplifier to be built on a small chassis, and installed where space is limited.

Signal Sensing: The amplifier has a signal-sensing turn-on circuit on the speaker level input. When a signal (up to 50 watts) is detected on the speaker level inputs, the amplifier will automatically power on. When the signal is no longer detected, the amp will turn off. This allows you to install the amplifier without a remote turn-on lead if the speaker level input is used.

Controls:

• Input Sensitivity: The Input Sensitivity control lets you match the amplifier input to the preamp output level of the source unit. The rotary control lets you adjust the sensitivity between 200mV (0.2V) and 5V, with markings at 0.2V, 0.3V, 0.5V, 1V, 2V, 3V, 4V, and 5V.
• Crossover: The low-pass crossover is always active (cannot be bypassed). The crossover slope is 24dB per octave and the crossover point is continuously variable from 50 Hz to 200 Hz.
• Bass Boost: The Bass Boost increases the signal centered at 40Hz. The rotary control lets you adjust the boost between 0dB and 18 dB.
• Infrasonic Filter: The infrasonic filter can be turned on or off, as desired. The filter slope is 24dB per octave at 25 Hz.

Connections:

• Line In: The XM502-1 has one pair of line level RCA inputs. The amp will accept a signal between 200mV and 5V.
• Power/Ground/Remote Turn-on: The amplifier has screw terminals for the power, ground, and remote turn-on, and will accommodate spade connectors. The power and ground terminals are 0.55" wide and the remote turn-on terminal is 0.34" wide.
• Speaker Output: One pair of screw terminals is provided for connecting the subwoofer. Both terminals are 0.34" wide, and accommodate spade connectors. The amplifier is designed for a 4Ω load, but can handle a 2Ω load.
• Speaker Level Input: When an RCA line level signal is not available, use the included 7" speaker level input harness (2-channel).
• Fuses: Two 30-amp ATC fuses are installed in the amplifier. With the 60-amp fuse rating, an 8-gauge amplifier wiring kit is recommended with a 60-amp (minimum) fuse installed next to the battery.
• Remote: The RJ-14 connection is for the optional KCA-RC01A wired remote control (item number 113RC01A, sold separately), allowing output level adjustment from the front of your vehicle. The remote is not waterproof.
• Input Covers: The RCA and speaker level inputs have covers installed; you should leave the cover in place for the unused inputs.