MM2

Waterproof / Submersible Speaker

PRODUCT  DESCRIPTION:

The MM2 is a 25-watt, submergence-proof design (U.S. Navy specification), with a serrated mounting bracket that allows for a 90 degree swivel. The MM2 is ideal for use near water or spray.

PRODUCT  SPECIFICATIONS:

• Power Handling: 8 Hours, 6-dB Crest Factor: 25 watts (500-5,000 Hz pink noise).

• Magnet Weight: 0.93 kg (2.1 Ib) Alnico V with plates.

• Frequency Response: 800-5,000 Hz ± 5 dB.

• Usable Low-Frequency Limit: 600 Hz.

• Impedance: 16 Ohms.

• Voice-Coil Diameter: 5.1 cm (2.0 in.).

• Sound Pressure Level (SPL): 104 dB at 1 Meter, 1 Watt. (Pink Noise Band-Limited from 800-5,000 Hz.)

• Horizontal Beamwidth: 82 0 @ 2 kHz.

• Vertical Beamwidth: 82 0 @ 2 kHz.

• Directivity Factor Ra (0): 10.25 @ 2 kHz.

• Usable Low-Frequency Limit: .../ 600 Hz.

• Transformer: No.

• Transformer Range: N/A.

• Crossover Required: None.

• Construction: Rugged die-cast aluminum case and transformer housing. Diaphragm is phenolic impregnated linen-base. All metal
  speaker parts are of anodized aluminum with baked-on acrylic paint. A cable entrance is provided on the bottom side.

• Mounting Method: Bulkhead Mounting.

• Dimensions: Height: 25.4 cm (10.0 in.); Width: 16.4 cm (6.4 in.; Depth: 11.3 cm (4.4 in.).

ENGINEER'S PRODUCT  DATA:

The University Sound MM2 is a conservatively rated 25-watt "submergence-proof" speaker designed for wall, ceiling, or bulkhead mounting.

The driver employs a diaphragm with a phenolic impregnated linen-base and 2.0-inch voice coil with "W" shaped Alnico V magnet structure.

Provisions are made in the housing for installation of a matching transformer such as the University Sound model 5030 (30 W).

The voice-coil/diaphragm assembly is protected by a special anit-fungicide treatment and is easily accessible for cleaning by removal of the die-cast reflector on the front of the speaker.

The MM2 is self-draining and designed to withstand fungus, dust, salt spray, live steam, and gases. It is built to penetrate high noise levels in boiler rooms, mines, railroads, etc.

NW=10.0