I8SC+ - Speaker Atlas Sound - Free user manual and instructions
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| Product Type | Ceiling Speaker |
| Model | I8SC+ |
| Brand | Atlas Sound |
| Speaker Size | 8 inches |
| Impedance | 8 ohms (low impedance) or 70V/100V distributed |
| Power Handling (RMS) | 60 Watts |
| Power Handling (Program) | 120 Watts |
| Frequency Response | 50 Hz - 20 kHz |
| Sensitivity | 90 dB (1W/1m) |
| Transformer Taps | 70V: 60W, 30W, 15W; 100V: 60W, 30W, 15W |
| Crossover Type | Internal passive crossover |
| Driver Composition | Polypropylene cone with rubber surround |
| Grille Material | Perforated steel, white painted |
| Dimensions (Diameter x Depth) | 10.5 in x 9.2 in (267 mm x 234 mm) |
| Cutout Dimensions | 9.3 in (236 mm) diameter |
| Weight | 6.5 lbs (2.95 kg) |
| Power Source | Passive (no external power required) |
| Mounting Type | Ceiling mount with dog ears |
| Certifications | UL 1480, UL 2043 for plenum air handling spaces |
| Operating Temperature | -20°C to 50°C |
| Cleaning Instructions | Wipe with dry cloth; do not use liquid cleaners |
| Safety Note | Ensure proper support for ceiling installation; disconnect power before wiring |
Frequently Asked Questions - I8SC+ Atlas Sound
What is the difference between 8 ohm and 70V operation for the I8SC+?
The I8SC+ can operate in low-impedance (8 ohm) mode for direct connection to an amplifier, or in high-impedance (70V/100V) mode with a built-in transformer for distributed audio systems. Use the tap switch on the front to select the desired power level in 70V/100V mode.
How do I install the I8SC+ in a ceiling?
Cut a hole in the ceiling to the specified cutout diameter (9.3 in). Remove the grille and connect the speaker wires to the terminal block. Insert the speaker into the hole and tighten the dog ears by turning the screws clockwise until they clamp tightly against the ceiling. Reattach the grille.
Can the I8SC+ be used in plenum spaces?
Yes, the I8SC+ is UL 2043 certified for use in air handling (plenum) spaces. The enclosure is designed to meet fire and smoke safety standards required for such installations.
What is the maximum power handling of the I8SC+?
The I8SC+ handles 60 Watts RMS and 120 Watts program. In 70V mode, the available taps are 60W, 30W, and 15W; in 100V mode, the same taps are available. Never exceed the rated power to avoid damage.
How do I select the transformer tap on the I8SC+?
Locate the rotary switch on the front of the speaker behind the grille. Turn it to the desired power setting (60W, 30W, 15W) corresponding to your system. Ensure the switch is set before installation.
What type of amplifier should I use with the I8SC+?
For low-impedance operation, use a standard 8 ohm amplifier. For 70V/100V distributed systems, use a 70V or 100V amplifier that can supply the total wattage of all connected speakers.
Does the I8SC+ come with a grille?
Yes, the speaker includes a white, paintable perforated steel grille. It can be painted to match the ceiling color using standard spray paint.
What is the frequency response of the I8SC+?
The I8SC+ has a frequency response of 50 Hz to 20 kHz, making it suitable for background music and paging applications with clear high frequencies and adequate bass.
How do I wire multiple I8SC+ speakers in a 70V system?
Connect the amplifier's 70V output to the '+' terminal of the first speaker, then daisy-chain the '+' of the first speaker to the '+' of the next, and similarly for the '-' terminals. Ensure total wattage of all speakers does not exceed the amplifier's rated output.
What accessories are available for the I8SC+?
Common accessories include a tile bridge for drop ceilings (Atlas Sound TB1), a backbox for fire-rating (BB-8), and a variety of grille colors if not painting the included white grille.
User questions about I8SC+ Atlas Sound
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USER MANUAL I8SC+ Atlas Sound
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Product information
Brand : Atlas Sound
Model : I8SC+
Category : Speaker