CM52-BGM-II - Loudspeaker SoundTube - Free user manual and instructions
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| Product Type | In-ceiling 2-way background music loudspeaker |
| Brand | SoundTube |
| Model | CM52-BGM-II |
| Speaker Type | 2-way coaxial in-ceiling loudspeaker |
| Woofer | 5.25 inch polypropylene cone woofer |
| Tweeter | 0.75 inch silk dome tweeter |
| Frequency Response | 75 Hz to 20 kHz |
| Nominal Impedance | 8 ohm (bypass mode) |
| Transformer Taps | 70V/100V: 5W, 10W, 20W, 30W; plus 8 ohm bypass |
| Power Handling | 30W RMS, 60W program, 80W peak |
| Sensitivity (1W/1m) | 88 dB SPL |
| Dispersion | 90° conical |
| Diameter | 267 mm (10.5 in) |
| Depth | 125 mm (4.9 in) |
| Weight | 2.2 kg (4.85 lb) |
| Ceiling Cutout | 193 mm (7.6 in) |
| Mounting | Spring-loaded mounting clamps for ceilings up to 25 mm thick |
| Connector | Removable screw terminal with loop-through output |
| Construction | UV-resistant polypropylene baffle, steel backcan, painted grille |
| Safety | UL 1480 regulated, complies with low-voltage wiring codes |
| Maintenance | Wipe grille with damp cloth; do not use abrasive cleaners |
| Repairability | Serviceable transformer and grille; no user-serviceable internal components |
Frequently Asked Questions - CM52-BGM-II SoundTube
What are the transformer taps on the CM52-BGM-II?
The CM52-BGM-II includes a 70V/100V transformer with selectable taps of 5W, 10W, 20W, and 30W, plus an 8-ohm bypass. Use the rotary switch or lead position to match your system's constant-voltage setting.
How do I install the CM52-BGM-II in a ceiling?
Cut a hole of 193 mm in diameter, route the speaker cable, set the transformer tap, then insert the speaker and tighten the four spring-loaded clamps. Ensure a clearance of at least 125 mm above the ceiling.
Can I paint the grille to match my ceiling?
Yes, the painted steel grille is paintable. Use a fine roller or spray paint with primer. Do not block the tweeter or vents with paint.
Is the CM52-BGM-II suitable for outdoor or wet locations?
The speaker is designed for indoor covered installations and can tolerate high humidity in covered outdoor locations when mounted with the grille facing down. Do not expose it to direct rain or water spray.
What is the difference between the 70V and 100V connection modes?
In 70V mode, connect the transformer primary to the amplifier's 70V output and select the wattage tap. In 100V mode, the same transformer works with 100V output. The 8-ohm bypass connects the woofer and tweeter directly to a conventional low-impedance channel.
How much power can the CM52-BGM-II handle?
In 8-ohm mode, it handles 30W RMS and 60W program. In constant-voltage mode, select a tap 30W or lower; the speaker can reproduce regular background music without distortion up to the selected tap rating.
What is included in the box?
Typically, the CM52-BGM-II includes the loudspeaker, a painted grille, a cutout template, and a screw-terminal connector. Some versions include a tile bridge or tile support ring, but check the packing list.
How do I select the correct tap for my system?
Choose a tap that provides enough SPL without overloading the amplifier. For background music, begin with the 10W tap; for foreground music, use 20W or 30W. If the system speaker count and amplifier power require lower total load, use a lower tap.
Can I daisy-chain multiple CM52-BGM-II speakers?
Yes, the screw-terminal connector has a loop-through output, allowing you to connect another speaker in parallel. For 70V/100V systems, keep the total wattage of taps below the amplifier's rated power.
What maintenance does the CM52-BGM-II require?
Check the grille and driver occasionally and clean with a dry microfibre cloth. Inspect the ceiling clamp tension after installation. If the speaker sounds distorted, verify the transformer tap and connections.
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USER MANUAL CM52-BGM-II SoundTube
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Product information
Brand : SoundTube
Model : CM52-BGM-II
Category : Loudspeaker