Ahuja SSB 60EM 60W PA mixer amplifier front panel controls

PA Mixer Amplifier Ahuja 60W

KTI14002001SS60

Product Description

The Ahuja SSB 60EM is a robust 60-watt public address mixer amplifier engineered for multi-microphone audio distribution and clear paging across commercial and industrial facilities.

Make / Brand: Ahuja
Model: SSB-60EM
Power Output: 90W Max, 65W RMS at 10% THD, 60W RMS at 5% THD, 50W RMS at 2% THD
Input Channels: 4 x Microphone inputs (0.65mV / 4.7kΩ) via 6.35 mm jacks, 1 x Auxiliary input (100mV / 470kΩ)
Frequency Response: 50 Hz to 15,000 Hz (±3 dB)
Signal-to-Noise Ratio: 60 dB
Tone Controls: Cut-type Bass (-10 dB at 100 Hz) and Treble (-10 dB at 10 kHz)
Preamplifier Output: 200mV / 600Ω for linking booster amplifiers or recording consoles
Speaker Outputs: 4Ω, 8Ω, 16Ω low-impedance taps and 100V high-impedance line
Output Regulation: ≤ 2 dB from no load to full load at 1 kHz
Power Requirements: AC 220–240V at 50/60 Hz (160VA) or DC 12V (3A) external battery (they are not included) with automatic changeover
Chassis Dimensions: 350 mm (W) x 120 mm (H) x 265 mm (D)
Weight: 8.5 kg

KTI14002001SS60

Price

₹ 8,506.35 excl. GST

+ 18.00% Tax + Freight Charge

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Product Details
Available Brands	Ahuja
Unit	Numbers
HSN Code	85423300
Weight	8.5 kg
Dimension	L 35 x W 26.5 x H 12 cm cm ft in m
Warranty	12 Months No-Onsite Warranty
Tags/categories	Automation PA Solutions Amplifiers, Speakers

Usually dispatched within 5 days

About this product .

The Ahuja SSB-60EM is a medium-power public address mixer amplifier engineered to provide reliable sound amplification and mixing in professional audio setups. Designed with high-performance analog circuitry, it delivers a rated output of 60W RMS (up to 90W maximum) across an audio bandwidth of 50 Hz to 15,000 Hz with less than 5% total harmonic distortion.
Built within a heavy-gauge sheet steel chassis with a powder-coated black finish, the amplifier offers resilience against demanding industrial environments. The front panel incorporates rotary control knobs for four individual microphone channels, master volume, and cut-type bass and treble equalization allowing up to -10 dB attenuation for speech clarity.
Audio connectivity includes four low-impedance 6.35 mm microphone jacks and one auxiliary input for external media players, preamplifiers, or line mixers. A dedicated 200mV / 600Ω preamplifier output is provided to feed line-level signals directly into higher-wattage booster amplifiers or audio recording equipment.
Speaker distribution flexibility is enabled through rear-panel screw terminals supporting both low-impedance speaker loops (4Ω, 8Ω, and 16Ω) and high-impedance 100V distributed lines equipped with line-matching transformers. Output regulation is held within 2 dB from no-load to full-load conditions to maintain consistent acoustic output.
The unit features dual-power supply capability, operating from standard AC 220–240V mains power while supporting seamless automatic transfer to an external 12V DC battery source (they are not included) during power outages, ensuring uninterrupted public address communication.
The SSB-60EM is widely deployed in workshops, warehouses, educational institutions, commercial offices, religious facilities, and mobile public address vehicles. Proper side and top clearance should be maintained during rack or shelf mounting to ensure unrestricted natural convection cooling.

Product Information .

Worship Places Shopping Malls, Showrooms Conference Rooms Auditorium Conference Hall Event Management

System Compatibility and Hardware Interfacing Guide

Audio Input Compatibility and Signal Routing

The Ahuja SSB-60EM public address mixer amplifier provides comprehensive input interfacing designed to accommodate dynamic acoustic transducers and standard line-level commercial audio sources. The input stage features four dedicated microphone input channels engineered for low-to-medium impedance dynamic microphones, presenting an input sensitivity of 0.65 mV across an input impedance of 4.7 kΩ via standard 6.35 mm (1/4") input jacks.

For auxiliary media and background music integration, the unit incorporates an auxiliary (Aux) channel with an input sensitivity of 100 mV and an input impedance of 470 kΩ. This input is fully compatible with line-level outputs from external audio mixers, media players, solid-state sound modules, and preamplifiers. Mic 4 and the Aux channel share an alternate volume control bus, allowing seamless selection between an additional speech transducer or line-level background music playback.

Speaker Impedance Matching and 100V Line Distribution

The output stage of the SSB-60EM features multi-tap terminal connections capable of driving both direct low-impedance loudspeaker configurations and high-voltage constant-voltage distributed speaker networks:

Low-Impedance Speaker Taps (4Ω, 8Ω, and 16Ω): Engineered for direct connection to standard low-impedance voice coil loudspeakers, driver units, and low-loss monitor speaker lines without intermediary transformers.
High-Impedance 100V Line Tap: Designed for driving multi-speaker commercial public address arrays over long cable runs. This output connects directly to 100V line-matching transformers (LMT) mounted on distributed ceiling speakers, column speakers, and industrial horn speakers.
Impedance Loading Precaution: To prevent output transformer saturation and impedance mismatch, low-impedance (4Ω, 8Ω, 16Ω) loudspeaker loops and high-voltage 100V distribution lines must never be connected simultaneously.

Interconnection with Booster Amplifiers and Recording Equipment

For system expansions requiring total acoustic power beyond the native 60W RMS / 90W Max rating of the SSB-60EM, the chassis incorporates a dedicated preamplifier output. Rated at an output level of 200 mV with an output load impedance of 600 Ω, this line-level connection allows the mixed audio signal—shaped by the onboard cut-type bass (-10 dB at 100 Hz) and treble (-10 dB at 10 kHz) tone controls—to feed directly into external high-power booster amplifiers. Additionally, this output is fully compatible with external recording hardware and logging systems for real-time broadcast monitoring and documentation.

Power Source Compatibility and Emergency DC Changeover

The SSB-60EM offers dual-source power input compatibility for stationary facilities and vehicular installations:

AC Mains Power: Operates natively on 220V to 240V AC at 50/60 Hz with a total rated power consumption of 160 VA.
External 12V DC Supply: Equipped with heavy-duty DC barrier terminals supporting direct connection to an external 12V DC power source or 12V car battery (they are not included) drawing up to 3A at rated load.
Automatic Failover: Features automatic changeover circuitry that instantaneously transfers power draw to the connected 12V DC battery source (they are not included) during AC mains outages, ensuring uninterrupted public address operation.

Ahuja SSB-60EM Installation and Commissioning Guide

Chassis Placement and Ventilation Requirements

The Ahuja SSB-60EM is built with a heavy-gauge sheet steel chassis featuring a powder-coated black finish. The unit measures 350 mm in width, 120 mm in height, and 265 mm in depth, with an overall weight between 7.0 kg and 8.5 kg. Mount or position the amplifier horizontally on a flat, stable equipment shelf, tabletop, or mobile console rack.

Ensure adequate physical clearance along the top and side ventilation zones. Continuous convection airflow is required for passive heat dissipation, preventing thermal buildup during high-duty cycles across commercial facilities, educational institutions, workshops, religious spaces, or mobile vehicle announcement deployments.

Dual Power Supply Wiring (AC Mains & DC Battery)

The amplifier is engineered for dual-source operational redundancy, accepting either standard AC mains or an external 12V DC input:

AC Mains Operation: Connect the integrated AC power cable to an earthed 220–240V AC supply at 50/60 Hz. Power consumption on AC mains is rated at 160VA.
DC Battery Operation: For mobile operations or emergency backup systems, connect an external 12V car battery (they are not included) to the rear DC screw terminals, consuming approximately 3A under full load. Maintain strict terminal polarity when wiring DC battery leads.
Automatic Power Transfer: When connected simultaneously to AC mains and a 12V battery (they are not included), the internal switching circuitry provides instant, automatic transfer to DC power if the AC line supply experiences a voltage outage.

Audio Input and Source Interfacing

The front control panel provides connection ports for up to four input sources via standard 6.35 mm (1/4") mono phone jacks:

Microphone Inputs (Mic 1 to Mic 4): Designed for dynamic microphones with an input sensitivity rating of 0.65mV across a 4.7kΩ input impedance. Channels Mic 1, Mic 2, and Mic 3 feature independent rotary gain potentiometers.
Auxiliary Input (Aux): Mic 4 shares a channel with an alternate line-level Aux input rated at 100mV across 470kΩ impedance, suitable for connecting external audio mixers, preamplifiers, or playback sources.

Always route low-level microphone wiring using balanced or high-density shielded cabling away from AC power lines to preserve the system's 60 dB signal-to-noise ratio across its 50 Hz to 15,000 Hz (±3 dB) operating bandwidth.

Speaker Output Routing and Impedance Matching

Audio output connections are made at the rear-panel barrier strip. System installers must configure the output wiring to match either a low-impedance speaker arrangement or a constant-voltage distributed line:

Output Terminal Type	Rated Output Load	Target Speaker Network
Low-Impedance Taps	4Ω, 8Ω, or 16Ω	Direct voice-coil speakers wired in series, parallel, or series-parallel to match terminal impedance.
High-Impedance Tap	100V Line	Multi-speaker distributed networks using line-matching transformers (LMT).

When wiring 100V distributed systems, ensure the combined wattage tap sum of all connected transformer speakers does not exceed the amplifier's continuous power rating (60W RMS at 5% THD, 65W RMS at 10% THD, or 50W RMS at 2% THD). Output regulation remains ≤ 2 dB from no-load to full-load at 1 kHz.

Critical Wiring Warning: Never connect low-impedance (4Ω, 8Ω, 16Ω) voice-coil speakers and 100V distributed line speakers to the output barrier strip simultaneously. Dual connection causes severe impedance mismatching and risks thermal overload of the output transformer.

Preamplifier Out Expansion and Tone Setup

The unit includes a line-level preamplifier output rated at 200mV / 600Ω on the rear panel. This feed allows direct interconnection to external booster amplifiers for system scaling or to dedicated audio recording hardware without loading down the microphone input preamplifiers.

Once audio sources and speakers are verified, power on the system and set the master and channel volumes. Use the front-panel cut-type tone controls (providing up to -10 dB attenuation at 100 Hz for Bass and -10 dB at 10 kHz for Treble) to adjust acoustic response and maximize speech intelligibility for the target environment.

Field Diagnostics and Fault Rectification Guide

This guide outlines structured diagnostic steps for field engineers and audio technicians troubleshooting the Ahuja SSB-60EM 60W PA mixer amplifier. System issues typically arise from impedance mismatches on the output barrier strip, improper input signal routing, input sensitivity overloading, or power supply changeover faults.

1. No Audio Output or Power Failure

When the amplifier fails to power on or produces no output signal across speaker lines, verify the operational power circuit and signal path:

AC Mains Operation: Ensure the primary source supplies 220–240V AC at 50/60 Hz. Verify that the AC power cable is firmly seated and that the power supply meets the 160VA nominal rating.
12V DC Battery Source: If operating on battery backup or during automatic changeover testing, inspect the rear DC terminal block. Ensure polarity is correct for the external 12V DC battery (they are not included) and verify that the DC source provides the required 3A operating current.
Input Channel Verification: Check that the 6.35 mm (1/4") input jacks for Mic 1 through Mic 4 (rated at 0.65mV / 4.7kΩ) and the Aux input (100mV / 470kΩ) are fully inserted. Verify that the respective rotary channel gain potentiometers and the master volume control are not set to minimum.
Mic 4 and Aux Signal Conflict: Note that Mic 4 and the Aux input share an alternate input channel. Ensure that an unused source is not attenuating or overriding the desired input channel.

2. Distorted Audio, Clipping, and Low Sound Pressure

Audio distortion or harmonic degradation indicates excessive input gain, driver stage clipping, or speaker mismatch:

Input Overdriving: Connecting line-level audio equipment (such as external preamps or high-output playback devices) directly to the high-sensitivity 0.65mV microphone inputs will saturate the preamplifier stage. Route high-level inputs strictly into the dedicated 100mV / 470kΩ Aux terminal.
Rated Power Exceedance: Total harmonic distortion rises significantly from 2% THD at 50W RMS to 5% THD at 60W RMS, and reaches 10% THD at 65W RMS (90W maximum output). If acoustic clipping occurs, attenuate input channel levels to keep continuous program power within the 60W RMS operating threshold.
Tone Control Saturation: The cut-type tone potentiometers allow up to -10 dB attenuation at 100 Hz (Bass) and -10 dB at 10 kHz (Treble). If speech intelligibility is compromised by low-frequency acoustic boom or feedback, trim the bass control.

3. Speaker Tap Impedance Mismatch and Thermal Overload

Improper termination on the rear barrier strip can cause output transformer overload or thermal shutdown:

Prohibited Simultaneous Connection: Never connect low-impedance speaker loads (4Ω, 8Ω, or 16Ω) simultaneously with high-impedance 100V distributed lines. This presents a dead short or severe impedance mismatch to the output stage and will overheat the unit.
High-Impedance (100V) Load Verification: Ensure all loudspeakers on the 100V line distribution are equipped with line-matching transformers (LMT). Sum the wattage tap ratings of all connected 100V speakers to verify the aggregate load does not exceed 60W RMS.
Low-Impedance Loop Verification: When wiring directly to 4Ω, 8Ω, or 16Ω speaker taps, verify that the series-parallel combination matches the selected terminal impedance within standard tolerances.
Ventilation Clearances: Ensure that the top and side cooling vents on the 350 x 120 x 265 mm chassis remain unobstructed to permit passive convection cooling across the internal heat sinks.

4. External Recording or Booster Feed Diagnostic

If auxiliary booster amplifiers or external recording decks receive weak or noisy signals, inspect the dedicated preamplifier output line:

Ensure the interconnect cable is terminated to the preamplifier output terminal (rated at 200mV / 600Ω).
Verify that downstream slave amplifiers accept a nominal 200mV line-level feed and that earth loops between connected chassis are grounded to prevent hum exceeding the 60 dB signal-to-noise floor.

Ahuja SSB-60EM Public Address Mixer Amplifier Industrial & Commercial Applications

The Ahuja SSB-60EM 60W PA Mixer Amplifier is engineered for dependable acoustic distribution across small-to-medium commercial, industrial, institutional, and mobile installations. Featuring a multi-input preamp mixer (4 dynamic microphone inputs and 1 auxiliary line input), dual AC/DC power options, and versatile 4Ω, 8Ω, 16Ω, and 100V speaker output taps, the SSB-60EM serves diverse deployment profiles requiring continuous speech clarity and background audio distribution.

Industrial Facilities, Workshops, and Warehouse Paging

In manufacturing plants, maintenance workshops, and logistics hubs, vocal intelligibility and operating resilience are critical. The SSB-60EM provides 60W RMS continuous power (at 5% THD, peaking up to 90W Max) to drive horn speakers and distributed column arrays across noisy shop floors. Plant supervisors can connect up to four dynamic microphones for direct departmental paging, voice dispatch, and shift change alerts. The built-in cut-type tone controls (-10 dB at 100 Hz for Bass and -10 dB at 10 kHz for Treble) allow operators to attenuate low-end acoustic rumble and high-end harshness, optimizing voice transmission across reflective factory interiors.

Educational Institutions, Auditoriums, and Assembly Areas

School campuses, lecture rooms, and training centers benefit from the amplifier's multi-microphone management and auxiliary routing:

Morning Assemblies & Multi-Speaker Panels: Connect up to four microphones simultaneously for podium speakers, administrators, and performers.
Audio-Visual Playback: The line-level Aux channel (100mV / 470kΩ, alternate to Mic 4) accommodates media players, laptops, or auxiliary mixers for educational audio reproduction.
Distributed Classroom Paging: The 100V line high-impedance output tap enables connection to multiple ceiling speakers equipped with line-matching transformers across extended cable runs without significant signal loss.

Places of Worship and Religious Facilities

Houses of worship require balanced acoustic coverage and versatile output routing. The SSB-60EM delivers a 50 Hz to 15,000 Hz (±3 dB) frequency response with a 60 dB signal-to-noise ratio, ensuring clear vocal delivery during services and sermons. The dedicated preamplifier output (200mV / 600Ω) allows direct interfacing with external recording decks to archive proceedings or feed secondary audio monitoring stations without disturbing primary speaker loads.

Mobile Broadcast and Vehicle Public Address

Designed with dual-source power flexibility, the SSB-60EM supports 220–240V AC mains operation (160VA) alongside a 12V DC input (3A draw). In mobile vehicle deployments—such as municipal announcement vans, emergency response vehicles, and transit information units—the amplifier runs directly off a 12V car battery (they are not included). For stationary installations subject to unstable grid power, the unit features automatic DC changeover terminals that instantly transfer power to a connected 12V backup battery (they are not included) during AC mains failure, maintaining uninterrupted public safety broadcasting.

System Expansion and Booster Integration

When venue expansion demands higher acoustic output than 60W RMS, system integrators can deploy the SSB-60EM as a master front-end control unit. The 200mV / 600Ω preamp output feeds high-wattage booster amplifiers to scale audio delivery across larger building zones while preserving centralized input volume and tone mixing.

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