MIL-SPEC · Electronic Components
LS-657/SIC
Loudspeaker, Permanent Magnet
Part NumberLS-657/SIC
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5965-00-577-1242 (NSN)
Federal Item NameLOUDSPEAKER,PERMANENT MAGNET
Federal Supply Class5965 — Headsets, Microphones, and Speakers
Cubic Measure182.0 CUBIC FEET
Transducer TypeDIAPHRAGM
Installation DesignNONPORTABLE
Frequency Response Range In Hertz+200.0 TO 10000.0
Usage DesignOUTDOOR
Impedance Rating In Ohms4.0 VOICE COIL NOMINAL
FSC Application DataCOMMUNICATIONS EQUIPMENT
Mounting Facility Quantity9
Test Data Document81349-MIL-L-24223C SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE D
Mounting MethodUNTHREADED HOLE(S)
Style DesignatorRECTANGULAR/SQUARE ENCLOSURE
Cancelled NSN5965-01-126-2832 (cancelled)
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is LS-657/SIC available?
We can source LS-657/SIC even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is LS-657/SIC by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If LS-657/SIC has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like LS-657/SIC?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for LS-657/SIC?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.