CM400i - Loudspeaker SoundTube - Free user manual and instructions
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| Product Type | Indoor/Outdoor Ceiling Loudspeaker |
| Model | CM400i |
| Driver Size | 4-inch polypropylene cone with rubber surround |
| Impedance | 8 ohms |
| Power Handling (RMS) | 30 watts |
| Power Handling (Peak) | 60 watts |
| Frequency Response | 70 Hz – 20 kHz |
| Sensitivity | 88 dB (1W/1m) |
| Dimensions (Diameter x Depth) | 7.5 x 4.5 inches (191 x 114 mm) |
| Cutout Size | 6.5 inches (165 mm) |
| Weight | 2.5 lbs (1.1 kg) |
| Mounting Type | Ceiling mount with spring-loaded clamps |
| Enclosure Material | High-impact ABS plastic |
| Grille | White, powder-coated steel, removable |
| Weather Resistance | IP44 (splash-proof) |
| Transformer (Optional) | 70V/100V line transformer (tap selectable via external switch) |
| Terminal Type | 4-pin screw terminal block |
| Compliance | UL 2043 (plenum-rated) |
| Warranty | 5 years limited |
| Accessories Included | Cutout template, paint shield, mounting screws |
Frequently Asked Questions - CM400i SoundTube
What is the recommended amplifier power for the CM400i?
The recommended amplifier power is between 15 and 60 watts RMS per channel at 8 ohms. Use an amplifier rated for a minimum of 30 watts for optimal performance.
Can the CM400i be used outdoors?
Yes, the CM400i has an IP44 rating, making it suitable for covered outdoor areas where it is protected from direct water spray. Avoid prolonged exposure to rain or direct sunlight.
How do I connect the speaker to a 70V system?
The speaker has an optional 70V/100V transformer with a tap selector switch on the baffle. Turn the switch to the desired wattage tap (e.g., 15W, 30W, 60W) and connect the 70V line from the amplifier to the speaker terminals.
What is the correct cutout size for ceiling installation?
The required cutout diameter is 6.5 inches (165 mm). Use the included template to ensure a precise fit before cutting the ceiling material.
Can the grille be painted?
Yes, the grille is paintable. Remove it from the speaker, clean it, and apply a thin coat of spray paint designed for metal. Allow it to dry completely before reinstalling.
How do I clean the speaker?
For the grille, use a soft brush or vacuum with a brush attachment. For the enclosure, wipe with a dry or slightly damp cloth. Do not use abrasive cleaners or solvents.
Is the CM400i compatible with 8-ohm or 4-ohm systems?
The CM400i is designed for 8-ohm systems. If you are using a 4-ohm amplifier, you may still connect one speaker per channel, but avoid connecting multiple speakers in parallel as the overall impedance will drop.
What is the maximum ceiling thickness for mounting?
The spring-loaded clamps can accommodate ceiling tiles or drywall up to 1.5 inches (38 mm) thick. Ensure the ceiling material is sturdy enough to support the speaker weight.
Does the speaker come with a back box?
No, the CM400i is an open-back design intended for use in plenum spaces. For retro-fit installations, a separate back box (model TBB-4) is available from SoundTube.
How do I adjust the tap setting on the transformer?
Locate the transformer tap selector switch on the front baffle of the speaker. Use a small flathead screwdriver to rotate the switch to the desired wattage setting (e.g., 1.5W, 3W, 6W, 12W, 24W). Ensure the system power is off before adjusting.
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USER MANUAL CM400i SoundTube
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Product information
Brand : SoundTube
Model : CM400i
Category : Loudspeaker