7.5-Watt External Speaker for Noisy Work Environments

The Motorola HSN8145B is a genuine 7.5-watt external speaker designed to make incoming mobile-radio communications easier to hear in noisy vehicles and demanding work environments.

It provides an additional audio boost when road noise, engines, machinery or the radio’s mounting location make its internal speaker difficult to hear.

Ideal for commercial fleets, construction equipment and utility vehicles, the HSN8145B allows radio audio to be positioned closer to the operator for improved clarity and accessibility.

Key Features

• Provides up to 7.5 watts of external radio audio

• Designed for noisy mobile work environments

• Helps overcome road, engine and equipment noise

• Positions incoming audio closer to the operator

• Useful when the radio’s internal speaker is obstructed

• Suitable for vehicle and fixed radio installations

• Compatible with select Motorola mobile radios

• Genuine Motorola Solutions accessory

Product Specifications

• Manufacturer: Motorola Solutions

• Model Number: HSN8145B

• Accessory Type: External mobile-radio speaker

• Rated Audio Output: 7.5 watts

• Application: Mobile and fixed radio installations

• Installation Type: External wired speaker

• Color: Black

Improved Audio in Noisy Environments

The HSN8145B can improve the audibility of incoming radio traffic in environments with:

• Road and wind noise

• Diesel engines

• Construction equipment

• Industrial machinery

• Vehicle heating and cooling systems

• Large or open equipment cabins

• Poorly positioned internal radio speakers

Actual volume and audio clarity depend on the connected radio, volume setting, speaker placement and surrounding noise level.

Radio Compatibility

Motorola confirms compatibility with select mobile radios, including:

• Motorola CM200d

• Compatible models from corresponding Motorola commercial mobile-radio families

The HSN8145B has also been used with various legacy Motorola mobile radios. Compatibility depends on the radio’s speaker output, connector and electrical requirements.

Confirm the exact radio model before ordering.

7.5-Watt Audio Output

The speaker’s 7.5-watt output provides a useful audio boost for standard noisy working environments without requiring a larger high-output speaker.

For exceptionally loud environments, a compatible 13-watt Motorola external speaker may be more appropriate.

HSN8145B vs. RSN4003A

Both models provide a 7.5-watt rating, but they are intended for different Motorola radio platforms and may use different connection requirements.

Do not treat the HSN8145B and RSN4003A as interchangeable without confirming compatibility with the specific mobile radio.

Important Product Distinction

The HSN8145B reproduces received radio audio. It is not a public-address horn, siren speaker or independently powered audio amplifier.

The connected radio must provide a compatible external-speaker output.

Installation Information

Install the speaker where it:

• Directs audio toward the operator

• Does not obstruct vehicle controls or visibility

• Remains protected from excessive moisture

• Does not interfere with airbags

• Allows safe cable routing

• Has sufficient clearance for secure mounting

Professional installation is recommended.

Package Contents

• One Motorola HSN8145B 7.5-watt external speaker assembly

Mobile radio and additional installation accessories are not included unless specifically stated by the seller.

Ideal Applications

• Commercial fleet vehicles

• Utility and service trucks

• Construction equipment

• Transportation vehicles

• Public-works equipment

• Industrial facilities

• Control stations

• Noisy mobile work environments

Why Buy from Delmarva Communications?

Delmarva Communications provides genuine communications equipment backed by more than 20 years of industry experience. Our team can help confirm radio compatibility and identify the correct external speaker for your Motorola installation.