51KPX300.4 - Receiver KICKER - Free user manual and instructions
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| Product Type | 4-Channel Car Audio Amplifier |
| Brand | Kicker |
| Model | 51KPX300.4 |
| Channels | 4 |
| RMS Power (4 ohms) | 50W x 4 |
| RMS Power (2 ohms) | 75W x 4 |
| Bridged RMS Power (4 ohms) | 150W x 2 |
| Total RMS Power | 300W |
| Frequency Response | 20Hz - 20kHz |
| Signal-to-Noise Ratio | >100 dB |
| Input Sensitivity | 200mV - 4V |
| Crossover Type | Variable Low-Pass (50Hz-200Hz) and High-Pass (50Hz-200Hz) |
| Dimensions (W x H x D) | 10.5 x 7.5 x 2.0 inches |
| Weight | 6.0 lbs |
| Power Supply Voltage | 10-16V DC |
| Fuse Rating | 30A x 1 |
| Protection Circuits | Thermal, Short Circuit, Overload |
| Cooling | Convection with Heatsink |
| Remote Turn-On | Yes (12V trigger) |
| Speaker Impedance | 4 ohms (stereo), 2 ohms (stereo), 4 ohms (bridged) |
| Audio Inputs | 4-channel RCA |
| Recommended Wire Gauge | 8 AWG power/ground |
Frequently Asked Questions - 51KPX300.4 KICKER
What is the power output of the Kicker 51KPX300.4?
The amplifier delivers 50W RMS per channel at 4 ohms, 75W RMS per channel at 2 ohms, and 150W RMS bridged at 4 ohms in two-channel mode.
How do I bridge channels on this amplifier?
To bridge channels, connect the positive speaker wire to the positive terminal of channel 1 (or 3) and the negative wire to the negative terminal of channel 2 (or 4). Ensure the amplifier is set to 2-channel mode and the load is 4 ohms minimum.
What is the recommended speaker impedance?
The amplifier can run 4-ohm or 2-ohm loads in stereo, and 4-ohm loads in bridged mode. Lower impedance may trigger protection.
Does the Kicker 51KPX300.4 have a built-in crossover?
Yes, it features variable Low-Pass and High-Pass filters adjustable from 50Hz to 200Hz, allowing use with subwoofers or full-range speakers.
What size power wire should I use?
Kicker recommends 8 AWG for power and ground connections. Ensure a secure connection to a metal chassis ground point.
How do I adjust the gain?
Set the gain using a distortion detection method: turn the gain dial fully counterclockwise, increase volume on head unit to about 75%, then slowly increase gain until distortion is heard, then back off slightly.
What protection modes does the amplifier have?
The amplifier includes thermal, short circuit, and overload protection. If it shuts off, allow it to cool or check speaker wiring.
Can I use this amplifier with aftermarket head units?
Yes, it accepts RCA inputs from any head unit with preamp outputs. For high-level inputs, you may need a line output converter.
What is the total RMS power rating?
The total RMS power is 300W when all channels are driven at their rated loads.
How do I connect multiple speakers?
You can connect multiple speakers in parallel or series as long as the total impedance per channel is not lower than 2 ohms (stereo) or 4 ohms (bridged).
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USER MANUAL 51KPX300.4 KICKER
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Product information
Brand : KICKER
Model : 51KPX300.4
Category : Receiver