APSUB-CH21 - Subwoofer PAC - Free user manual and instructions
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| Product Type | Powered Subwoofer |
| Brand | PAC |
| Model | APSUB-CH21 |
| RMS Power | 150 Watts |
| Peak Power | 300 Watts |
| Frequency Response | 35 Hz - 200 Hz |
| Impedance | 4 Ohm |
| Woofer Size | 8 inches |
| Signal-to-Noise Ratio | 90 dB |
| Input Sensitivity | 0.1V - 4V |
| Low Pass Filter | 50 Hz - 150 Hz adjustable |
| Phase Control | 0 - 180 degrees |
| Remote Level Control | Included |
| Dimensions (W x H x D) | 13.4 x 10.6 x 7.5 inches |
| Weight | 12.3 lbs |
| Power Supply | 12V DC |
| Fuse Rating | 20A |
| Protection Circuits | Short circuit, overheat, overvoltage |
| Installation | Wiring harness included |
| Maintenance | Clean with soft dry cloth |
| Safety | Professional installation recommended |
| Spare Parts & Repairability | Contact PAC Service Center for replacement parts |
Frequently Asked Questions - APSUB-CH21 PAC
How do I connect the PAC APSUB-CH21 subwoofer to my car stereo?
Connect the subwoofer's line inputs to your stereo's speaker outputs or RCA preamp outputs using the included wiring harness. Ensure the power lead is connected to a fused 12V source and the ground is securely attached to a clean metal chassis point.
What power supply does the APSUB-CH21 require?
It operates on a standard 12V DC vehicle electrical system. Use a fuse rated at 20A on the power wire to protect the unit from short circuits.
Can I use this subwoofer in my home?
This subwoofer is designed for 12V automotive use. If you wish to use it at home, you will need a 12V DC power supply with sufficient current capacity and an appropriate audio source, but performance may vary.
How do I adjust the low-pass filter?
Turn the low-pass filter knob to set the crossover frequency between 50 Hz and 150 Hz. A lower setting delivers only deep bass, while a higher setting blends more mid-bass. Adjust according to your main speakers' size.
Why does my subwoofer produce no sound?
First check the power LED; if it is off, verify the remote turn-on wire, fuse, and ground connection. If power is present, inspect the RCA or speaker input connections, and ensure the gain control is not set to minimum.
How do I set the phase control?
Play a bass-heavy track and switch the phase control between 0° and 180°. Choose the position that produces the loudest and deepest bass in your listening position.
What is the recommended fuse rating?
Replace the subwoofer's in-line fuse with a 20A ATO/ATC fuse. Never use a fuse with a higher rating, as it may damage the amplifier section.
How do I clean the subwoofer grille?
Use a soft, dry cloth to wipe the grille and enclosure. Avoid water or harsh chemicals. If the grille is heavily soiled, a slightly damp cloth followed by a dry cloth can be used.
Is a remote level control included?
Yes, the APSUB-CH21 includes a remote bass level control with a cable. Connect it to the designated port on the subwoofer and mount the control under the dashboard for easy adjustments.
Does the subwoofer come with a wiring kit?
The package includes the subwoofer, remote level control, and a basic wiring harness for power, ground, and signal. It does not include the power cable or fuse holder, which you may need to purchase separately.
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USER MANUAL APSUB-CH21 PAC
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Product information
Brand : PAC
Model : APSUB-CH21
Category : Subwoofer