The Loudspeaker,permanent Magnet, cataloged under National Stock Number 5965-00-128-2991, is classified within Federal Supply Class 5965 (Headsets, Handsets, Microphones and Speakers) of the Electrical and Electronic Equipment Components group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5965-00-128-2991 |
| Item Name | Loudspeaker,permanent Magnet |
| FSC / FSG | 5965 / 59 — Headsets, Handsets, Microphones and Speakers |
| Status | ACTIVE |
| Mounting Facility Quantity | 2 |
| Transducer Type | CONE |
| Mounting Method | BRACKET(S) AND BOLT |
| Transducer Diameter | 4.0 INCHES NOMINAL IN |
| Impedance Rating in Ohms | 4.0 VOICE COIL NOMINAL |
| Nondefinitive Spec/std Data | LS11 TYPE |
| Power Rating | 1.00 WATTS NORMAL AND 2.50 WATTS PEAK |
| Mounting Facility Thread Size and Series/type Designator | 3/8-24 UNF |
| Transformer Primary Impedance Rating in Ohms | 250.0 NOMINAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 6C51 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5965-00-128-2991 is a Loudspeaker,permanent Magnet, classified under FSC 5965, Headsets, Handsets, Microphones and Speakers. Status: active.
Key specifications for 5965-00-128-2991: Mounting Facility Quantity: 2; Transducer Type: CONE; Mounting Method: BRACKET(S) AND BOLT; Overall Length: 4.625 INCHES NOMINAL IN. 9 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.