C645 - Loudspeaker Proficient - Free user manual and instructions
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| Product Type | In-ceiling Loudspeaker |
| Driver Configuration | 2-way: 6.5" woofer, 1" tweeter |
| Impedance | 8 ohms |
| Power Handling (RMS) | 60W |
| Power Handling (Peak) | 120W |
| Frequency Response | 50 Hz - 20 kHz |
| Sensitivity | 90 dB |
| Cutout Diameter | 6.75" (171 mm) |
| Overall Diameter | 8.25" (210 mm) |
| Depth | 3.5" (89 mm) |
| Weight | 2.5 lbs (1.13 kg) |
| Grille | Paintable, magnetic attachment |
| Mounting System | Dog-ear clamps |
| Wiring | Spring-loaded terminals |
| Safety Rating | UL 2043 for plenum air spaces |
| Certifications | CE, RoHS |
| Recommended Use | Indoor ceiling installation |
| Cleaning Instructions | Wipe grille with damp cloth; do not use abrasive cleaners |
| Spare Parts Availability | Please contact Proficient customer support for replacement drivers or grilles |
| Repair Information | Refer to authorized service center; user-replaceable parts: none |
Frequently Asked Questions - C645 Proficient
Can the grille be painted?
Yes, the grille is paintable. Remove the grille, spray paint evenly with a thin coat, and let dry completely before reattaching.
What is the recommended amplifier power?
Use an amplifier with a power rating between 15W and 60W RMS per channel at 8 ohms for optimal performance.
How do I wire the speaker?
Connect positive (+) and negative (-) wires to the spring-loaded terminals on the speaker. Ensure proper polarity for best sound.
Can I install this speaker in a bathroom or outdoor area?
No, this speaker is designed for indoor use in dry locations only. Do not expose to moisture or extreme temperatures.
What is the cutout size required?
The cutout diameter is 6.75 inches (171 mm). Ensure the ceiling depth is at least 3.5 inches (89 mm) for proper fit.
How do I adjust the tweeter angle?
The tweeter is fixed; however, you can pivot the entire speaker slightly during installation to aim the sound.
Is the speaker magnetic?
The grill attaches magnetically for easy removal. The speaker itself contains magnets, so keep away from sensitive electronics.
Can I use this speaker with a 70V distributed audio system?
No, this model is a low-impedance 8 ohm speaker, not compatible with 70V systems without a transformer.
How do I clean the speaker?
Wipe the grille and baffle with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth. Do not use liquid cleaners near the driver.
Where can I find replacement parts?
Contact Proficient customer support or an authorized dealer for replacement grilles or drivers. Do not attempt to repair drivers yourself.
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USER MANUAL C645 Proficient
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Product information
Brand : Proficient
Model : C645
Category : Loudspeaker