APSUB-FD21 - Subwoofer PAC - Free user manual and instructions
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| Product Type | Powered Subwoofer |
| Model | APSUB-FD21 |
| Brand | PAC |
| Amplifier Power (RMS) | 200 Watts |
| Woofer Size | 10 inches |
| Frequency Response | 30 Hz – 200 Hz |
| Impedance | 4 Ohms |
| Enclosure Type | Sealed |
| Dimensions (H x W x D) | 12.5 x 12.5 x 12.5 inches |
| Weight | 18.5 lbs |
| Inputs | Speaker-level (spring clips), Line-level (RCA) |
| Phase Control | 0° / 180° |
| Low Pass Filter | Adjustable 40 – 200 Hz |
| Auto On/Off | Yes |
| Power Supply | AC 110-120V, 60Hz |
| Cabinet Finish | Black vinyl |
| Grille | Removable cloth grille |
| Safety Features | Short circuit protection, thermal protection |
| Cleaning and Maintenance | Wipe with dry cloth; do not use solvents |
| Spare Parts and Repairability | Contact PAC customer service for parts |
| Included Accessories | Power cord, user manual |
Frequently Asked Questions - APSUB-FD21 PAC
How do I connect the APSUB-FD21 to my receiver?
You can connect using speaker-level inputs (spring clips) if your receiver has no subwoofer output, or line-level RCA inputs for dedicated subwoofer output.
Where should I place the subwoofer for best bass?
Place it near a wall or corner for enhanced bass. Avoid placing it directly against the wall to prevent muffled sound. Experiment with placement for optimal room acoustics.
The subwoofer does not power on. What should I check?
Ensure the power cord is firmly plugged into an AC outlet. Check that the auto-on/off switch is set correctly. Test the outlet with another device.
How do I set the crossover frequency?
Adjust the low pass filter knob to match your main speakers' lower limit. Typically set to 80 Hz for home theater systems.
Can I use this subwoofer in a car?
No, this subwoofer is designed for home AC power (110-120V). For car use, you need a 12V powered subwoofer.
What is the warranty period?
PAC typically offers a 1-year limited warranty against defects. Keep your proof of purchase.
How do I clean the subwoofer?
Wipe the cabinet with a dry, soft cloth. Do not use water, cleaners, or abrasives. Remove the grille gently to dust the driver.
Why is there a humming noise?
Hum may be caused by a ground loop. Ensure all audio components share the same power strip. Try using a ground loop isolator if needed.
Can I adjust the phase?
Yes, the phase switch allows 0° or 180° to align subwoofer output with main speakers for smoother integration.
What does the auto-on feature do?
The subwoofer automatically powers on when it detects an audio signal and shuts off after several minutes of inactivity to save energy.
User questions about APSUB-FD21 PAC
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USER MANUAL APSUB-FD21 PAC
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Product information
Brand : PAC
Model : APSUB-FD21
Category : Subwoofer