Glen,
Short answer:
he MRC-67 series (specifically the MRC-67A) is a rugged, waterproof, and amplified loudspeaker designed by McDowell Research for military/tactical environments, such as vehicles or command centers. It monitors a single transceiver/encryption unit with 5W maximum output, 10–36 VDC power, and automatic muting when PTT is keyed.
I have used them and they sound OK. They are well a well build quality item, very rugged. We ordered them for many of our systems.
CAVEAT: However, If I were in a non-tactical environment, and I was going to be using the system for a long duration, would replace it with something that is full range (i.e. sounds better)
73,
Gene K1NR
GO PATS !
On 02/06/2026 7:42 AM EST Glenn Little WB4UIV via Milsurplus <
[email protected]> wrote:
Does anyone have any information on this amplified speaker?
Would like a service manual, wishful thinking.
Or possibly the connector pin outs.
Thanks
73
Glenn
WB4UIV
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Glenn Little ARRL Technical Specialist QCWA LM 28417
Amateur Callsign: WB4UIV [email protected] AMSAT LM 2178
QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR
"It is not the class of license that the Amateur holds but the class
of the Amateur that holds the license"
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