SC-423C-F - Loudspeaker QSC - Free user manual and instructions
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| Product Type | Ceiling Mount Loudspeaker |
| Brand | QSC |
| Model | SC-423C-F |
| Driver Configuration | 4-inch full-range driver |
| Frequency Response | 70 Hz - 20 kHz |
| Sensitivity (1W/1m) | 88 dB SPL |
| Impedance | 8 ohms (bypass transformer) / 70V/100V transformer taps |
| Power Handling (RMS) | 30 W |
| Transformer Taps (70V) | 30W, 15W, 7.5W, 3.8W |
| Transformer Taps (100V) | 30W, 15W, 7.5W |
| Coverage Angle | 120° conical |
| Maximum SPL | 103 dB |
| Dimensions (Dia. x Depth) | 10.2 in x 8.5 in (259 mm x 216 mm) |
| Ceiling Cutout | 9.1 in (231 mm) |
| Weight (Net) | 6.5 lb (2.95 kg) |
| Enclosure Material | Steel backcan with ABS baffle |
| Grille | Perforated steel, white (paintable) |
| Safety Features | UL 2043 rated for plenum air spaces; seismic attachment point |
| Installation | Spring-loaded mounting arms for quick installation in ceilings up to 2 in thick |
| Connectors | 4-position euroblock connector for daisy-chaining |
| Environmental Rating | Indoor use only (protected location) |
| Included Accessories | Cutout template, mounting hardware, paint shield |
| Warranty | 6 years limited |
Frequently Asked Questions - SC-423C-F QSC
What is the recommended amplifier power for the SC-423C-F?
The recommended amplifier power is 30 W RMS at 8 ohms or via transformer taps. For optimal performance, use an amplifier with a power rating between 30 and 60 W into the selected tap.
Can the SC-423C-F be used outdoors?
No, the SC-423C-F is designed for indoor use only. It is rated for plenum spaces (UL 2043) but is not weatherproof. For outdoor applications, consider a QSC outdoor-rated model.
How do I select the correct transformer tap?
Choose the tap that matches your system's power requirements. For 70V systems, available taps are 30W, 15W, 7.5W, and 3.8W; for 100V systems: 30W, 15W, and 7.5W. The sum of all speaker taps should not exceed the amplifier's power.
What is the cutout diameter for ceiling installation?
The required ceiling cutout diameter is 9.1 inches (231 mm). Use the included template for precise cutting.
How do I clean the grille and speaker?
Use a soft, dry cloth to dust the grille. For stubborn dirt, slightly dampen the cloth with water (no solvents). Do not spray liquids directly onto the speaker. The grille is paintable with water-based paint.
Is the SC-423C-F compatible with 8 ohm systems?
Yes, the speaker can operate in 8 ohm mode by bypassing the transformer. Set the tap selector to the '8Ω' position. In this mode, power handling is 30 W RMS.
Does the speaker have a seismic attachment point?
Yes, the SC-423C-F includes a seismic attachment point on the backcan for safety in earthquake-prone areas. Use a safety cable (not included) to secure the speaker.
What is the coverage angle of the SC-423C-F?
The speaker provides a 120° conical coverage, suitable for even sound distribution in large ceiling areas such as offices, retail spaces, and schools.
Can I paint the grille to match my ceiling?
Yes, the grille is paintable. Use a water-based paint and remove the grille before painting. The included paint shield protects the driver during installation.
How do I wire multiple SC-423C-F speakers?
Use the 4-position euroblock connectors for easy daisy-chaining. Observe polarity (marked + and -). For 70V/100V systems, ensure all speakers are set to the same voltage and sum of taps does not exceed amplifier power.
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USER MANUAL SC-423C-F QSC
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Product information
Brand : QSC
Model : SC-423C-F
Category : Loudspeaker