PM400X2 - Receiver Rockford Fosgate - Free user manual and instructions
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| Product Type | 2-Channel Car Audio Amplifier |
| Brand | Rockford Fosgate |
| Model | PM400X2 |
| Power Output (RMS) | 200W x 2 @ 4 ohms, 400W x 2 @ 2 ohms |
| Bridged Power (RMS) | 800W x 1 @ 4 ohms |
| Total Dynamic Power | 800W |
| Amplifier Class | Class AB |
| Frequency Response | 20 Hz - 20 kHz (±0.5 dB) |
| Signal-to-Noise Ratio | >100 dB (A-weighted) |
| Total Harmonic Distortion | <0.05% |
| Input Sensitivity | 150 mV - 5 V |
| Crossover Type | Variable high-pass/low-pass (50-500 Hz) |
| Dimensions (W x L x H) | 13.5 x 9.2 x 2.4 inches (343 x 234 x 61 mm) |
| Weight | 6.2 lbs (2.8 kg) |
| Power Supply Voltage | 11-16 V DC |
| Protection Circuits | Thermal, short circuit, over-current, DC offset |
| Number of Channels | 2 |
| Input Connectors | RCA line level inputs |
| Output Connectors | Gold-plated screw terminals |
| Cooling | Convection cooling with finned heatsink |
| Recommended Speaker Impedance | 4 ohms (stereo), 4 ohms (bridged) |
| Warranty | 1 year (manufacturer) |
Frequently Asked Questions - PM400X2 Rockford Fosgate
How do I bridge the PM400X2 amplifier?
To bridge the PM400X2, connect the positive speaker wire to the left positive terminal and the negative speaker wire to the right negative terminal. Ensure the amp is set to bridged mode if applicable. The minimum impedance for bridged operation is 4 ohms.
What is the recommended power wire gauge for the PM400X2?
For runs up to 10 feet, use 8 AWG wire. For longer runs (10-20 feet), use 4 AWG wire to minimize voltage drop. Ensure the fuse is rated at 40A.
Can I run the PM400X2 at 1 ohm?
No, the PM400X2 is not stable at 1 ohm. The minimum impedance is 2 ohms per channel in stereo or 4 ohms bridged. Running lower impedances may cause the amplifier to overheat or trigger protection.
How do I set the gain on the PM400X2?
Set the gain using a multimeter or oscilloscope. For 200W RMS at 4 ohms, target 28.3V AC output. Play a sine wave (50-60 Hz) at high volume (3/4 head unit volume) and adjust gain until you reach the desired voltage. Avoid clipping.
What size fuse does the PM400X2 require?
The PM400X2 uses a single 40A AGU or ATC fuse. Always replace with the same rating to prevent damage.
Does the PM400X2 have a remote bass knob?
No, the PM400X2 does not include a remote bass level control. However, you can add an external bass knob if desired, but it is not standard.
Why is my PM400X2 going into protect mode?
Protect mode can be triggered by a short circuit in speaker wires, low impedance (below 2 ohms per channel), overheating, or a faulty power connection. Check all wiring and ensure proper ventilation.
Can I use the PM400X2 with a factory head unit?
Yes, but you may need a line output converter (LOC) if the factory unit lacks RCA outputs. The input sensitivity of 150 mV allows connection to speaker-level outputs via a LOC.
What is the frequency response of the PM400X2?
The frequency response is 20 Hz to 20 kHz within ±0.5 dB, making it suitable for both subwoofers and full-range speakers.
How do I clean and maintain the PM400X2?
Use a dry, soft cloth to wipe dust from the heatsink and casing. Avoid liquid cleaners. Ensure ventilation grilles are clear. Periodically check connections for corrosion.
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USER MANUAL PM400X2 Rockford Fosgate
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Product information
Brand : Rockford Fosgate
Model : PM400X2
Category : Receiver