High-Grade Condition – Crown 135MA – 3-Input Commercial Mixer-Amplifier – 35W – 8Ω/70V/100V Outputs – Universal 100–240V

High-Grade Condition – Crown 135MA – 3-Input Commercial Mixer-Amplifier – 35W – 8Ω/70V/100V Outputs – Universal 100–240V

🔹 Condition

Used Equipment – Good Condition – Operational Testing Recommended

This Crown 135MA commercial mixer-amplifier shows normal cosmetic signs of previous installation and commercial use, including surface marks, light scratches, dust, and wear around the controls.

The front control knobs, indicator lights, input controls, master volume control, bass and treble adjustments, rear RCA inputs, Phoenix-style terminal blocks, DIP configuration switches, and IEC power inlet are present.

Several external low-voltage audio wires remain attached to the rear preamp-output terminal. These wires are remnants of the previous installation and may be removed or re-terminated during installation.

The supplied photos do not show the amplifier powered on or connected to speakers. Therefore, complete operational testing of the inputs, amplifier output, paging priority, telephone output, and controls is recommended before advertising it as fully tested and operational.

🔹 Description

The Crown 135MA is a compact commercial mixer-amplifier engineered for paging, background music, announcements, and music-on-hold systems in restaurants, retail stores, offices, warehouses, cafés, schools, hospitality facilities, and other commercial environments.

It combines three individually controlled audio inputs with a single 35-watt amplifier output channel, reducing the need for separate mixing and amplification equipment.

Input 1 supports a balanced microphone or line-level source through a Phoenix-style terminal connector. Inputs 2 and 3 use stereo RCA connectors that combine stereo sources into mono, making them suitable for music players, streaming devices, tuners, and other background-music sources.

The amplifier supports standard 8-ohm speakers as well as distributed 70V and 100V speaker systems. This makes it suitable for both small single-room systems and commercial installations using multiple ceiling or wall-mounted speakers.

Priority muting can be activated through VOX voice detection or an external priority switch, allowing announcements from Input 1 to automatically reduce the background-music level. Crown also includes 15V phantom power for compatible microphones, plus master bass and treble controls for final system adjustment.

🔹 Electrical Specifications

Input Voltage: 100–240V AC

Phase: Single Phase

Frequency: 50/60 Hz

Power Consumption: 95W

Amplifier Output: 35W

Output Channels: 1

Power Type: Electric

Power Supply: Universal internal power supply

Power Connection: Standard IEC inlet

The rear panel confirms a universal 100–240V AC, 50/60 Hz, 95W power requirement. Crown specifies a universal power supply with a line-voltage tolerance of approximately +15% and −20%.

🔹 Audio Output Specifications

Rated Amplifier Power: 35W

Low-Impedance Speaker Output: 8Ω

Distributed Speaker Outputs: 70V and 100V

Output Configuration: Single-channel mono

Preamp Output: Phoenix-style balanced terminal

Nominal Line Output Level: 1V into 10 kΩ

The 8-ohm, 70V, and 100V output options allow the amplifier to operate with standard low-impedance speakers or commercial distributed-audio speaker systems.

🔹 Input Configuration

Input 1

Balanced Phoenix-style connector

Selectable microphone or line-level operation

Priority input capability

Voice-activated VOX muting

External priority-contact connection

Selectable 15V phantom power

Input 2

Dual RCA unbalanced stereo-summing input

Independent front-panel volume control

Suitable for background-music sources

Input 3

Dual RCA unbalanced stereo-summing input

Independent front-panel volume control

Suitable for background-music sources

Telephone / Music-on-Hold Connection

Dedicated telephone music-on-hold output

Selectable 8Ω or 600Ω operation

Independent telephone-output level adjustment

Crown officially specifies one balanced microphone/line input, two dual-RCA music inputs, telephone output, priority muting, and phantom power.

🔹 Audio Performance

Frequency Response at 1W: 50 Hz–20 kHz, ±1 dB

Extended Frequency Response: 19 Hz–34 kHz, +0/−3 dB

Total Harmonic Distortion plus Noise: Less than 0.5% at rated power and 1 kHz

THD+N at 5W: Less than 0.1% at 1 kHz

Crosstalk: Approximately −82 dB at 1 kHz

Phantom Power: 15V DC

Signal-to-Noise Ratio

Microphone Input: Greater than 58 dB

Line Input: Greater than 60 dB

Telephone Input: Greater than 60 dB

Inputs 2 and 3: Greater than 78 dB

Input Sensitivity

Input 1 – Microphone: 3mV

Input 1 – Line: 800mV

Inputs 2 and 3: 400mV

These audio-performance specifications are published by Crown for the 135MA.

🔹 Dimensions

Width: 12.6 in

Depth: 9.6 in

Height: 4.2 in without feet

Approximate Height with Feet: 4.5 in

Weight: Approximately 8.2 lb

The Crown 135MA uses a compact half-rack-style chassis suitable for shelf, tabletop, cabinet, or rack installation with the appropriate optional mounting kit.

🔹 Construction

Heavy-duty black metal chassis

Brushed black front control panel

Compact commercial installation design

Four individual front-panel rotary level controls

Three source-level controls

One master-volume control

Separate bass and treble adjustments

Front-panel signal and clip indicators

Front-panel power control

Rear DIP-switch configuration bank

Phoenix-style removable terminal connectors

Dual RCA audio inputs

Standard IEC power inlet

Ventilated enclosure for heat management

Optional rack-mounting compatibility

🔹 Key Features

Three independently controlled audio inputs

Single 35W commercial amplifier channel

Supports 8Ω speaker systems

Supports 70V distributed speaker systems

Supports 100V distributed speaker systems

Balanced microphone/line input

Two dual-RCA music inputs

Automatic stereo-to-mono summing

Priority muting through VOX

Priority muting through an external switch

Selectable 15V phantom power

Dedicated telephone music-on-hold output

Selectable 8Ω or 600Ω telephone output

Independent telephone-output level control

Preamp output for system expansion

Master bass and treble controls

Front signal and clip indicators

Universal 100–240V power supply

Compact commercial chassis

Suitable for continuous installed-audio applications

Crown recommends this model for installed sound, paging, background music, and music-on-hold applications.

🔹 Recommended Applications

Restaurants and cafés

Bars and lounges

Retail stores

Office buildings

Warehouses

Commercial kitchens

Hotel public areas

Reception areas

Waiting rooms

Schools and training facilities

Medical and dental offices

Houses of worship

Conference rooms

Small paging systems

Background-music systems

Music-on-hold installations

Distributed ceiling-speaker systems

🔹 Certifications and Compliance

Commercial installed-audio design

FCC-compliant configuration

Universal power-supply design

Applicable safety and conformity information should be confirmed from the complete product data label or the manufacturer’s declaration before making a specific UL, CE, or other certification claim in the final listing.

🔹 Manufacturing Information

Manufacturer: Crown Audio

Parent Company: Harman International

Brand: Crown

Model: 135MA

Series: Commercial Audio Series

Equipment Type: Three-Input Commercial Mixer-Amplifier

Country of Manufacture: China

Installation Type: Tabletop, shelf, cabinet, or optional rack mounting

The rear panel identifies the unit as manufactured in China for Crown, a Harman International company.

🔹 Included

Crown 135MA commercial mixer-amplifier

Installed front control knobs

Installed rear Phoenix-style terminal connectors shown in the photos

Attached low-voltage wires shown at the preamp-output connector

Unit sold exactly as photographed

IEC power cord is not shown and should be considered not included unless separately confirmed.

Microphone, audio-source cables, speakers, and rack-mounting hardware are not included.

🔹 Testing Recommended Before Listing

Connect the amplifier to the correct AC power cable

Confirm that the power indicator illuminates

Test Input 1 in microphone mode

Test Input 1 in line-level mode

Test Inputs 2 and 3 through the RCA connectors

Test all front input-level controls

Test the master-volume control

Test the bass and treble controls

Test the 8Ω speaker output

Test the 70V speaker output with a compatible speaker system

Test the 100V output only with compatible equipment

Verify the signal and clip indicators

Test VOX priority muting

Test external priority muting

Test phantom-power operation

Test the preamp output

Test the telephone music-on-hold output

Inspect and properly terminate all rear wiring

🔹 Important Notes

Used commercial audio equipment

Normal cosmetic wear is visible

External installation wires remain attached to one terminal

Power cord is not visible in the supplied photos

Complete operational testing is recommended

Requires compatible speakers and proper output wiring

Do not connect standard 8Ω speakers to the 70V or 100V terminals

Installation by an experienced commercial-audio technician is recommended

Sold as-is, where-is

No manufacturer warranty included

Shipping calculated at checkout

Local pickup available