Ahuja SSB 45EM 45W PA Mixer Amplifier front panel with control knobs and mic inputs

Ahuja SSB 45EM PA Mixer Amplifier, 45W

KTI14002001SS45

Product Description

The Ahuja SSB-45EM is a compact 45-watt public address mixer amplifier engineered for reliable sound distribution across commercial and institutional installations.

Brand / Make: Ahuja
Model: SSB-45EM
Power Output: 64W Max., 45W RMS at 10% THD, 40W RMS at 5% THD, 30W RMS at 2% THD
Input Channels: 3 × Microphone (0.65mV / 4.7kΩ), 1 × Auxiliary (100mV / 470kΩ)
Frequency Response: 100 Hz to 15,000 Hz ±3dB
Tone Shaping: Cut-type Bass (-10dB at 100Hz) and Treble (-10dB at 10kHz) controls
Preamplifier Output: 200mV / 600Ω for chaining to booster amplifiers or recording consoles
Speaker Outputs: 4Ω, 8Ω, 16Ω direct taps and 100V line distribution tap
Power Supply: AC 220–240V (50/60Hz) / DC 12V external battery (they are not included) with instant auto-switchover
Power Consumption: AC 110VA, DC 2A

KTI14002001SS45

Price

₹ 5,481.95 excl. GST

+ 18.00% Tax + Freight Charge

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Product Details
Available Brands	Ahuja
Unit	Numbers
HSN Code	85184000
Weight	4.8 kg
Dimension	L 27 x W 28 x H 12 cm cm ft in m
Warranty	12 Months No-Onsite Warranty
Tags/categories	Automation PA Solutions Amplifiers, Speakers

Usually dispatched within 4 days

About this product .

The Ahuja SSB-45EM is an industrial-grade 45-watt medium-wattage Public Address mixer amplifier designed to provide dependable acoustic reinforcement and announcement broadcasting across small to medium-sized commercial facilities.
Equipped with 3 low-impedance microphone inputs and 1 high-impedance auxiliary line input, the unit allows seamless simultaneous mixing of vocal speech and background audio from external media players, laptops, or streaming devices.
Tone shaping is handled through dedicated cut-type Bass and Treble rotary controls, allowing audio technicians to adjust vocal intelligibility and eliminate acoustic resonance in reverberant environments.
For versatile loudspeaker integration, the amplifier features both low-impedance speaker taps at 4Ω, 8Ω, and 16Ω, as well as a 100V line output tap designed for driving distributed multi-speaker ceiling speaker and column horn networks fitted with line matching transformers.
A dedicated preamplifier line output rated at 200mV / 600Ω enables direct looping into secondary booster power amplifiers for system expansion or integration with sound recording consoles.
The system operates on standard 220–240V AC mains power and incorporates an automatic instant switchover feature to external 12V DC battery power (they are not included) to prevent sound interruptions during mains electrical failures.
Housed in a rugged compact metal chassis measuring 280 mm wide by 120 mm high by 270 mm deep and weighing 4.8 kg, the amplifier is suited for schools, places of worship, factory shop floors, and commercial paging stations.

Product Information .

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

Ahuja SSB-45EM System Integration and Hardware Compatibility

The Ahuja SSB-45EM 45W medium-wattage Public Address mixer amplifier is engineered for versatile integration across commercial, institutional, and industrial audio architectures. Its dual-impedance speaker outputs, standardized line-level routing, and multi-source input stages enable seamless pairing with both legacy PA equipment and modern sound reinforcement hardware.

Loudspeaker Load and Distribution Network Compatibility

The amplifier is equipped with versatile terminal taps on the rear panel to support two distinct loudspeaker wiring topologies: direct low-impedance speaker loads and high-impedance constant-voltage distributed lines.

Low-Impedance Direct Drive (4Ω, 8Ω, 16Ω): Accommodates standard 4-ohm, 8-ohm, and 16-ohm loudspeaker configurations without requiring intermediate transformers. Ideal for short-run installations such as local paging horns, monitoring boxes, or small room acoustic clusters.
High-Impedance Constant-Voltage Line (100V): Designed for multi-speaker distributed public address networks across large facilities, school campuses, or commercial corridors. Operates directly with ceiling speakers, sound columns, and horn speakers equipped with 100V Line Matching Transformers (LMT).
Load Regulation: Delivers tight output voltage regulation of ≤ 2 dB from no load to full load at 1kHz, maintaining consistent audio levels across variable speaker tap loads up to the 45W RMS rated threshold (64W Max, 40W RMS at 5% THD, 30W RMS at 2% THD).

Audio Input Source Interfacing

The SSB-45EM features four dedicated audio input channels tailored for speech reinforcement and line-level background music playback:

Microphone Inputs (Mic 1, Mic 2, Mic 3): Three discrete microphone channels rated at 0.65mV sensitivity with a 4.7kΩ input impedance. Optimized for dynamic low-impedance microphones, including manufacturer-recommended models such as the Ahuja ASM-580XLR, AUD-101, and AUD-77DX, to mitigate howling and feedback during high-gain operations.
Auxiliary Input (Aux 1): One auxiliary channel rated at 100mV sensitivity and 470kΩ input impedance. Compatible with standard unbalanced line-level playback devices, including media players, CD players, desktop or laptop audio outputs, digital tone generators, and pre-mixer program feeds.

System Expansion, Booster Chaining, and Recording Compatibility

For installations requiring sound coverage beyond the onboard 45W power capacity, the unit includes an integrated preamplifier output rated at 200mV into a 600Ω load. This line-level output allows direct, low-distortion daisy-chaining into high-wattage power booster amplifiers or audio distribution matrices without requiring external attenuation. Additionally, the 200mV / 600Ω terminal can be interfaced directly with recording consoles, logging devices, or archiving systems to capture announcements and live proceedings simultaneously.

Power Supply and Redundancy Integration

Designed for mission-critical industrial paging and public notification reliability, the amplifier incorporates flexible dual-power operation:

AC Mains Operation: Operates on standard AC 220–240V single-phase supplies at 50/60Hz, with an operational consumption rating of 110VA.
DC Emergency Power: Accepts an external 12V DC battery (they are not included) via dedicated rear screw terminals, consuming 2A during direct current operation.
Automatic Failover: Features automatic instant transfer switching to the 12V DC battery supply (they are not included) if AC mains power is interrupted, ensuring uninterrupted broadcast availability for emergency announcements.

Ahuja SSB-45EM PA Mixer Amplifier Installation & Wiring Guide

Proper installation of the Ahuja SSB-45EM 45W medium-wattage Public Address mixer amplifier ensures optimal acoustic fidelity, reliable signal distribution, and uninterrupted operation across commercial paging, educational facilities, places of worship, and industrial shop floors. Installers must adhere to manufacturer electrical, thermal, and load-matching specifications during system integration.

Mechanical Placement and Physical Profile

The Ahuja SSB-45EM features a compact chassis with physical dimensions of 280 mm in width, 120 mm in height, and 270 mm in depth, with an overall net weight of 4.8 kg. The unit is designed for desktop placement or flat equipment shelf integration within control rooms and equipment racks. Maintain adequate clearance around the chassis to facilitate natural convective heat dissipation under sustained loads up to 64W Max.

Speaker Output Matching and Terminal Configuration

The amplifier is equipped with dedicated rear output terminals supporting both low-impedance direct drive and high-impedance distributed audio systems:

Low-Impedance Connections (4Ω, 8Ω, and 16Ω): Connect low-impedance speaker arrays directly to the Common (COM) and corresponding 4Ω, 8Ω, or 16Ω taps. Ensure the total net impedance of the speaker circuit strictly matches the chosen tap to prevent stage overload.
High-Impedance Distributed Line (100V): For long-distance cable runs and multi-speaker distributed networks (e.g., ceiling or wall box speakers), wire the circuit between Common (COM) and the 100V terminal. Every connected speaker must feature an integrated Line Matching Transformer (LMT). The cumulative wattage tap sum of all connected 100V speakers should not exceed the rated output capacity (45W RMS at 10% THD / 40W RMS at 5% THD).
Output Voltage Regulation: The integrated stage provides output regulation of ≤ 2 dB from no load to full load at 1 kHz, maintaining consistent audio delivery across variable zone switching.

AC Mains and 12V DC Emergency Power Wiring

The Ahuja SSB-45EM features a hybrid power supply architecture enabling dual-source electrical integration:

AC Mains Operation: Connect the integrated power lead to a standard 220–240V AC supply at 50/60Hz. Power consumption during full AC operation is rated at 110VA.
12V DC Backup Power: Secure external 12V DC battery (they are not included) leads to the rear DC screw terminals, observing strict polarity. Current draw under 12V DC operation is rated at 2A.
Automatic Failover: In the event of an AC utility failure, the amplifier instantly and automatically switches to the connected 12V DC battery (they are not included) supply without operational downtime or audio signal loss.

Input Cabling, Source Interfacing, and Tone Calibration

Integrate source equipment and line-level distribution through the designated input and output channels:

Microphone Inputs: Connect up to three microphones to the dedicated Mic 1–3 inputs (rated at 0.65mV / 4.7kΩ sensitivity). The use of low-impedance dynamic microphones such as the Ahuja ASM-580XLR, AUD-101, or AUD-77DX is recommended to minimize line interference, noise pickup, and acoustic feedback howling.
Auxiliary Input: Connect media players, line preamps, tuners, or playback consoles to the 1 × Aux input (100mV / 470kΩ).
Preamp Output: Utilize the 200mV / 600Ω Preamp Out terminal for chaining the program feed into high-output booster amplifiers or routing the audio mix to recording devices.
Frequency and Tone Shaping: The amplifier operates across a 100 Hz to 15,000 Hz (±3dB) frequency response range with a 60 dB Signal-to-Noise (S/N) ratio. Adjust the front-panel cut-type tone controls (Bass: -10dB at 100Hz; Treble: -10dB at 10kHz) to optimize speech intelligibility and eliminate venue-specific resonance.

Ahuja SSB-45EM Operational Diagnostics and Troubleshooting Guide

Power Supply and Instant Switchover Diagnostics

The Ahuja SSB-45EM operates from dual power inputs: AC mains (220–240V at 50/60Hz, consuming 110VA) and external DC 12V (consuming 2A). If the amplifier fails to power on or drops out during operation, verify that the AC supply voltage is within the 220–240V operating range. For installations utilizing continuous battery backup (they are not included), ensure that the DC polarity on the rear terminals is connected correctly. The unit is designed with an automatic instant transfer mechanism that shifts power seamlessly to the 12V DC battery supply (they are not included) during an AC power failure. If the amplifier shuts off when AC mains drops, inspect the external 12V battery (they are not included) voltage level, cable gauge, and terminal contact resistance.

Speaker Terminal Impedance and Line Matching Rectification

Audio distortion, thermal cut-offs, or low acoustic output typically stem from incorrect speaker load impedance or configuration errors across the output taps (4Ω, 8Ω, 16Ω, and 100V line):

Low-Impedance Connections (4Ω, 8Ω, 16Ω): Ensure that total connected speaker network impedance matches the selected tap exactly. Connecting a speaker load below 4Ω forces excessive current draw beyond the 45W RMS rated threshold, elevating Total Harmonic Distortion (THD) above the rated 10% THD at 45W RMS or 2% THD at 30W RMS.
Distributed 100V Line System: When using the 100V output tap, all connected ceiling speakers, horn speakers, or sound columns must be equipped with Line Matching Transformers (LMT). Never connect standard low-impedance voice coils directly to the 100V terminal.
Regulation Check: Output voltage regulation is rated at ≤ 2 dB from no load to full load at 1kHz. Significant level drops when adding speakers indicate an overloaded output tap exceeding the 45W RMS / 64W Max limit.

Input Sensitivity, Feedback Suppression, and Microphone Matching

The amplifier includes 3 Microphone input channels rated at 0.65mV / 4.7kΩ sensitivity and 1 Auxiliary input rated at 100mV / 470kΩ sensitivity, maintaining a Signal-to-Noise (S/N) ratio of 60 dB across a frequency response of 100 Hz to 15,000 Hz ±3dB.

Acoustic Feedback and Howling: Due to the sensitive 0.65mV / 4.7kΩ mic input stage, high-gain settings in reflective acoustic environments can cause acoustic resonance. Utilize low-impedance dynamic microphones such as the Ahuja ASM-580XLR, AUD-101, or AUD-77DX to minimize feedback and howling.
Tone Control Attenuation: Apply the integrated cut-type tone controls to mitigate low-frequency rumble and high-frequency screech. The cut-type Bass control provides up to -10dB attenuation at 100Hz, while the cut-type Treble control provides up to -10dB attenuation at 10kHz.
Auxiliary Input Distortion: Ensure line-level audio playback sources (CD players, media streamers, laptops) are routed exclusively to the Aux input (100mV / 470kΩ) and not into the 0.65mV mic inputs to avoid front-end input clipping.

Preamp Output and System Chaining

If audio is absent or distorted when linking the Ahuja SSB-45EM to an external booster amplifier or recording console, inspect the Preamp output connection rated at 200mV / 600Ω. Ensure the receiving booster amplifier or recorder line-input accepts a 200mV unbalanced feed. Verify that the intermediate interconnect cable does not exceed line run limitations to preserve the 100 Hz to 15,000 Hz frequency response.

Ahuja SSB-45EM PA Mixer Amplifier Commercial & Industrial Applications

The Ahuja SSB-45EM is an industrial-grade 45-Watt medium-wattage public address mixer amplifier engineered for continuous voice distribution, background music playback, and safety paging across small-to-medium facilities. Featuring dual-power operation (220–240V AC and 12V DC battery support), three balanced/unbalanced microphone inputs, one auxiliary channel, and selectable direct low-impedance (4Ω, 8Ω, 16Ω) plus distributed 100V line outputs, the unit integrates smoothly into diverse institutional, commercial, and industrial sound architectures.

Educational Facility Paging & Assembly Sound Systems

In schools, colleges, and training institutes, the Ahuja SSB-45EM serves as a dependable central amplifier for morning assembly grounds, multipurpose lecture halls, and administrative public address networks. The 3 Mic inputs (0.65mV / 4.7kΩ) accommodate multiple dynamic microphones—such as the Ahuja ASM-580XLR, AUD-101, or AUD-77DX—for podium speakers and announcers, while the dedicated auxiliary input (100mV / 470kΩ) allows playback of bells, anthems, or audio lessons from media players and laptops. Output regulation of ≤ 2 dB ensures stable volume and vocal clarity across classrooms or courtyard speakers.

Factory Floor Announcements & Warehouse Operations

Manufacturing floors, dispatch bays, and logistics warehouses require high-intelligibility paging capable of cutting through background plant noise. The SSB-45EM delivers 64W Max (45W RMS at 10% THD) across a broad 100 Hz to 15,000 Hz frequency response. For multi-building sites or extended factory corridors, the 100V line output allows distributed speaker arrays equipped with line matching transformers to run over long cable distances without line-loss degradation.

During AC power outages on the plant floor, the unit provides instant automatic transfer to an external 12V DC battery (they are not included), drawing 2A DC to maintain uninterrupted emergency announcements and operational shift signaling.

Places of Worship & Community Hall Voice Reinforcement

Acoustic management in prayer halls, temples, mosques, and community centers benefits from the amplifier's built-in cut-type tone shaping controls (-10dB at 100Hz for Bass and -10dB at 10kHz for Treble). These tone filters eliminate low-end boominess and suppress high-frequency feedback in reverberant spaces. A 60 dB signal-to-noise ratio maintains clean, intelligible speech reproduction across seated congregations.

Commercial Retail Spaces & System Chaining Deployments

For retail showrooms, clinics, and hospitality venues requiring zoned coverage or audio logging, the SSB-45EM includes a dedicated preamplifier output rated at 200mV / 600Ω. This preamp feed connects directly to external booster amplifiers for high-wattage expansion across larger zones or feeds line-level signals into dedicated recording consoles for archival storage.

Application Configuration Matrix

Deployment Environment	Input Channels Utilized	Output Configuration	Key Functional Benefit
School Assembly & Administration	2–3 Mics + 1 Aux	100V Distributed Line	Simultaneous multi-mic podium input & audio playback
Industrial Warehouse / Plant	1–2 Mics	100V Line or 4Ω / 8Ω / 16Ω	Instant auto-switch to 12V DC battery (they are not included) during AC loss
Place of Worship / Hall	3 Mics	4Ω / 8Ω / 16Ω Direct Taps	Bass & Treble cut controls to mitigate acoustic room feedback
Commercial Store / Paging Zone	1 Mic + 1 Aux	Preamp Out to Booster	Unbuffered pre-out for booster expansion and audio recording

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