Icom SP-24 External Speaker for IC-M424G / IC-M803 / IC-M802 Series
The SP-24 is the OEM external speaker for Icom IC-M424G, IC-M803, and IC-M802 marine transceivers. It delivers up to 7 W maximum input power at 8 Ω impedance through a 110 × 110 mm driver, matching the acoustic output designed for these radio platforms. The unit ships with the MB-82 mounting bracket and screws for bulkhead or panel installation in a separate cabin, helm station, or below-deck position.
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Why Professionals Choose the Icom External Speaker SP-24
The IC-M424G and IC-M803 are fixed-mount marine transceivers typically installed at the chart table or lower helm. On vessels with a flybridge, cockpit station, or separate watch position, the radio's internal speaker does not carry audio to where the crew is operating. The SP-24 places a dedicated 7 W speaker at the secondary station - a flybridge helm, a wheelhouse overhead panel, or an engine room monitor position - so radio traffic reaches the operator without requiring them to leave station to hear a call.
The 110 × 110 mm driver matches the speaker unit supplied with compatible Icom marine radios at the factory, which means tonal character and volume levels are consistent between the radio's internal speaker and the SP-24 extension. Rated input power is 5 W, with a 7 W maximum — sufficient for open cockpit and wheelhouse environments where engine noise or wind requires speaker output above ambient. The MB-82 mounting bracket included in the kit allows surface or bulkhead mounting with standard screws; no additional hardware is needed for installation.
Third-party external speakers for marine VHF and SSB applications vary in impedance matching to Icom outputs. The SP-24 is engineered to the impedance specification of the IC-M424G and IC-M803 amplifier stages. A mismatched impedance load reduces audio output and can stress the radio's final audio stage over time.
AXDIGITAL LLC is an authorized Icom dealer supplying OEM accessories for marine radio installations across the US.
Specification
External Speaker - SP-24
| Type | External Speaker |
| Maximum Input Power | 7W |
| Rated Input Power | 5W |
| Impedance | 8 Ω |
| Speaker Size | 110 × 110mm |
| Output Sound Pressure Level | N/A |
| Waterproof | Not waterproof |
| Color | Black |
| Dimensions (W×H×D) | 110 × 110 × 84.4mm |
| Weight | 307g |
| Mounting | MB-82 bracket (included) |
| Supplied Accessories | MB-82 mounting bracket, screws |
FAQ
Is the SP-24 compatible with the Icom IC-M424G and IC-M803?
Yes. Both the IC-M424G and IC-M803 are on the official Icom SP-24 compatible products list at icomamerica.com. The SP-24 matches the speaker specification of the IC-M424G factory-supplied unit. For IC-M802 (discontinued) and other older marine SSB models listed by authorized dealers, contact our team to confirm compatibility for your specific installation before ordering.
Does the SP-24 come with a mounting bracket, and is it waterproof?
The SP-24 ships with the MB-82 mounting bracket and screws — no additional hardware is needed for standard bulkhead or panel installation. The SP-24 is not waterproof (Icom lists N/A for waterproof rating). It is designed for protected helm positions, chart tables, below-deck cabins, or covered wheelhouse installations — not for open cockpit or exposed deck mounting.
