The Loudspeaker,permanent Magnet, cataloged under National Stock Number 5965-00-243-6420, is classified within Federal Supply Class 5965 (Headsets, Handsets, Microphones and Speakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Gauss, Karl Gmbh Fachbereich Funkelektrik. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5965-00-243-6420 |
| Primary Part Number | LS-166/U |
| Item Name | Loudspeaker,permanent Magnet |
| FSC / FSG | 5965 / 59 — Headsets, Handsets, Microphones and Speakers |
| Manufacturer | Gauss, Karl Gmbh Fachbereich Funkelektrik |
| Status | ACTIVE |
| Mounting Facility Quantity | 2 |
| Terminal Quantity | 1 |
| Usage Design | OUTDOOR |
| Terminal Type | CONNECTOR, PLUG |
| Transducer Type | CONE |
| Mounting Method | BOLT AND BRACKET(S) |
| Frequency Response Range in Hertz | +300.0 TO 7000.0 |
| Style Designator | SQUARE ENCLOSED |
| Connector Manufacturer Part Number | U-77/U |
| Transducer Diameter | 4.0 INCHES NOMINAL IN |
| Impedance Rating in Ohms | 8.0 VOICE COIL NOMINAL |
| Connector Manufacturer Code | 81349 |
| Test Data Document | 81349-MIL-L-12632 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Power Rating | 2.00 WATTS NORMAL AND 3.00 WATTS PEAK |
| Mounting Facility Thread Size and Series/type Designator | 3/8-24 UNF |
| Installation Design | NONPORTABLE |
| Transformer Primary Impedance Rating in Ohms | 600.0 NOMINAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| LS-166/U | Gauss, Karl Gmbh Fachbereich Funkelektrik (DEU) |
| Reference | Meaning |
|---|---|
| SCDL2677 | 5/1 Secondary reference U.S. Government activity |
| 1756604 | 5/1 Secondary reference U.S. Government activity |
| 271-0220-00 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| DWG6002 | 5/9 Secondary reference U.S. Government activity |
| LS-166/U | 5/1 Secondary reference U.S. Government activity |
| 271-0220-000 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| SCDL68417REVR | 5/1 Secondary reference U.S. Government activity |
| MILL12632BTYPELS166U | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| MIL-DTL-12632/2 | 4/1 Identification reference U.S. Government activity |
| MIL-L-12632/2 | 5/9 Secondary reference U.S. Government activity |
| LS-166/U | 2/2 Government specification standardization U.S. Government activity |
| 85-123 | 5/1 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple |
NSN 5965-00-243-6420 is a Loudspeaker,permanent Magnet, manufactured by Gauss, Karl Gmbh Fachbereich Funkelektrik, classified under FSC 5965, Headsets, Handsets, Microphones and Speakers. Status: active.
NSN 5965-00-243-6420 has 1 manufacturer part number on file: LS-166/U (Gauss, Karl Gmbh Fachbereich Funkelektrik).
3 possible matches (shared part number, not a government interchangeability claim): 5910-00-643-8893, 5340-01-300-2917, 4710-01-319-5053. Verify interchangeability with system specifications before substitution.
Key specifications for LS-166/U: Mounting Facility Quantity: 2; Terminal Quantity: 1; Usage Design: OUTDOOR; Terminal Type: CONNECTOR, PLUG. 17 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). 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.