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Kenwood Excelon X450-4
4-channel car amplifier 60 watts RMS x 2 at 4 ohms + 100 watts RMS x 2 at 4 ohms (New Stock)
Our take on the Kenwood Excelon X450-4 by Crutchfield's Buck Pomerantz
Distributes the power where you need it
This sweet-looking Kenwood Excelon X450-4 4-channel amplifier gives "versatility" a whole new meaning. Think of it as two amps in one housing. The first amp serves up 60 watts RMS each to two speakers, while the second amp delivers 100 watts RMS to two others (or 150 watts each to two 2-ohm subs). Here are some possible system configurations that this amp can run:
- Power your front speakers with 60 watts RMS each, and rear-fill speakers with 100 watts each;
- Power a set of component speakers up front with 100 RMS watts each, and the rear-fills with 60 watts each;
- Power your front speakers with 60 watts RMS each, and two subwoofers with up to 150 watts each;
- Power your front speakers with 60 watts RMS each, and a larger subwoofer with 300 watts.
Tuning where you need it
High-pass filters on both amps let you tailor the sound to fit your vehicle and speakers. When you're running a subwoofer, you can adjust a low-pass filter and a bass boost on Amp B to get just the right bass for your vehicle, while optimizing your sub's performance.
The unique fin shape of the extruded aluminum heatsink helps pull heat away from the amp's interior, reducing distortion and extending the amp's life. An intelligent thermal management system continually monitors the temperature and turns on a cooling fan when necessary, saving your music from any interruptions due to overheating.
Built very well! Great product
Jason, Staunton, VA
What's in the Box:
- 4-Channel amplifier
- Two 40-amp fuses (installed)
- 2.5mm Allen wrench
- Four 5/8" Self-tapping screws
- 2 End caps (installed)
- Instruction manual (English/ French/ Spanish)
- Warranty card
- 4-channel car amplifier
- Amp A: 60 watts RMS x 2 at 4 ohms (75 watts RMS x 2 at 2 ohms)
- Amp B: 100 watts RMS x 2 at 4 ohms (150 watts RMS x 2 at 2 ohms)
- Amp B bridged: 300 watts RMS x 1 at 4 ohms (4-ohm stable bridged, Amp A not bridgable)
- variable high-pass filters on all channels (50-200 Hz, 12 dB/octave)
- variable low-pass filter on B channels (50-200 Hz, 24 dB/octave)
- variable bass boost on B channels (0-18 dB at 40 Hz)
- cooling fan
- preamp inputs
- fuse rating: 40A x 2
- 4-gauge power and ground leads recommended wiring and hardware not included with amplifier
- 13-5/8"W x 2-3/16"H x 7-3/8"D
- warranty: 2 years
- Our 60-day money-back guarantee
Kenwood Excelon X450-4 Reviews
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Features and Specs
|RMS Power Output (Watts x Channels)||
60 x 2
100 x 2
|Peak Power Output (Watts x Channels)||---|
|Power at 2 Ohms (Watts x Channels)||75 x 2|
|Bridged Power (Watts x Channels)||300 x 1|
|Minimum Impedance Bridged||4|
|Minimum Impedance Unbridged||2|
|Best Frequency Response||5-50k Hz|
|THD at Rated RMS Power||1%|
|Signal to Noise Ratio||80 dB|
|Amplifier Class||Not Given|
|Low-Pass Crossover Frequency||50-200 Hz|
|Low-Pass Slope (dB/octave)||24 dB/oct|
|High-Pass Crossover Frequency||50-200 Hz|
|High-Pass Slope (dB/octave)||12 dB/oct|
|Bass Boost||0-18 dB|
|Bass Boost Frequency||40 Hz|
|Speaker Level Inputs||No|
|Parts Warranty||2 Years|
|Labor Warranty||2 Years|
Asymmetrical Design: The Kenwood X450-4 is basically two different size amps built into one chassis, both full-range and 2-channel. Amp A is 60 watts x 2 and amp B is 100 watts x 2. Amp B is also bridgeable to 300 watts x 1, so it can be used to power a subwoofer.
CEA-2006 Compliant: CEA-2006 is a system of testing and measurement methods for mobile audio amplifiers. This voluntary standard advocates a uniform method for determining 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 into a 4-ohm load, with 1% or less Total Harmonic Distortion plus noise (THD+N), and over a frequency range of 20 Hz to 20 kHz (when applicable). Signal-to-Noise ratio is measured in weighted absolute decibels (dBA) at a reference of 1 watt into 4 ohms. CEA-2006 allows consumers to compare car amplifiers and receivers on an equal basis. Using CEA-2006 criteria, the X450-4 is rated at 60 watts RMS x 2 plus 100 watts RMS x 2 with an 80 dBA signal to noise ratio.
Specifications: The manual also lists these non CEA-2006 compliant specifications:
- A Channels: 75 watts x 2-channels (into 2Ω, at 1 kHz, no more than 0.5% THD)
- B Channels:
- 2Ω: 100 watts x 2 (at 1 kHz, no more than 0.5% THD)
- Bridged: 300 watts x 1 (into 4Ω, at 1 kHz, no more than 1% THD)
- Signal to Noise Ratio: 100 dB (at rated power)
Cooling Fan: There is a cooling fan to help dissipate heat and ensure cool, reliable operation. Make sure not to block the vents or the fan when installing the amplifier.
Input Sensitivity: The X450-4 features independent gain controls for the A and B channels. The input sensitivity of each is adjustable from 200 mV to 5.0 volts.
A Channel Crossover: The A channels have a switch to set the built-in crossover to high-pass or off (full-range). The high-pass crossover point is adjustable from 50-200 Hz and the crossover slope is 12 dB/octave.
B Channel Crossover: The B channels have a switch to set the built-in crossover to low-pass, off (full-range), or high-pass. The crossover point is adjustable from 50-200 Hz. The crossover slopes are 24 dB/octave for low-pass and 12 dB/octave for high-pass.
Bass Boost: The B channels have a bass boost circuit centered at 40 Hz; boost is variable from 0 to +18 dB.
Input Selector: The signal for the A and B amplifier channels can be supplied from separate inputs (two pair of stereo RCAs), or from just the A channel inputs (stereo RCAs); set the switch to AB or A.
Aluminum Heat Sink: The aluminum heat sink increases the amplifier's heat dissipation efficiency, increasing the life of the amplifier.
Power And Ground Terminals: The amplifier features screw terminals for power and ground. They will accommodate spade connectors up to 0.55" wide.
Remote Turn-On Terminal: The remote turn-on is a screw terminal that will accommodate a spade connector up to 0.35" wide.
Speaker Terminals: The four pair of speaker outputs are screw terminals and will accommodate spade connectors up to 0.35" wide.
Signal Inputs: The amplifier features two pair of RCA input connections, A and B.
Fuses: Two 40-amp ATO fuses are installed in the amplifier chassis.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.
Product reviews from the Crutchfield Labs
by Zak Billmeier
Kenwood Excelon line of amplifiers - three models featuring a small footprint, clean design, and covered by a reassuring 2-year warranty.
Why did you buy this?
Good price and quality [ demone Mar 03, 2016 ]
Got it at a great price. [ Garrett Feb 09, 2016 ]