Ahuja SSB 120DP 120W PA Mixer Amplifier

KTI14002001SSA1

Product Description

The Ahuja SSB-120DP is a high-reliability 120-watt public address mixer amplifier equipped with a built-in digital MP3 media player for commercial and industrial acoustic installations.

Make / Brand: Ahuja
Model: SSB-120DP
Power Output: 120W RMS at 10% THD, 105W RMS at 5% THD, 160W RMS Maximum
Input Channels: 5 x Mic (0.65 mV / 4.7 kΩ), 2 x Aux (100 mV / 470 kΩ)
Digital Media Player: Integrated MP3 playback via USB drive and SD/MMC card reader with IR remote control (remote requires cells; they are not included)
Speaker Outputs: Direct taps for 4Ω, 8Ω, and 16Ω; Line distribution for 70V and 100V lines
Frequency Response: 50 Hz to 15,000 Hz (±3 dB)
Signal-to-Noise Ratio: 60 dB
Tone Controls: Bass ±8dB/±10dB at 100Hz, Treble ±8dB/±10dB at 10kHz
Preamplifier & Line Output: Preamp 200mV / 600Ω, Line 1V / 1kΩ (for booster amplifier coupling)
Power Supply: 220–240V AC (50/60 Hz) / 12V DC (automotive/backup battery; battery is not included) with instant auto-transfer to DC on AC mains failure
Dimensions & Weight: 420 (W) x 135 (H) x 295 (D) mm; 11.0 kg

KTI14002001SSA1

5.0

1 ratings

Price

₹ 15,159.15 excl. GST

+ 18.00% Tax + Freight Charge

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Product Details
Available Brands	Ahuja
Unit	Numbers
HSN Code	85184000
Weight	11 kg
Dimension	L 42 x W 29.5 x H 13.5 cm cm ft in m
Warranty	12 Months No-Onsite Warranty
Tags/categories	Automation PA Solutions Amplifiers, Speakers

Usually dispatched within 8 days

About this product .

The Ahuja SSB-120DP delivers an acoustic power rating of 120 Watts RMS (at 10% THD) and up to 160 Watts RMS maximum output. Its multi-channel preamplifier and mixer stage accommodates up to 5 dynamic microphones and 2 line-level auxiliary inputs, enabling balanced blending of speech and background audio in professional sound distribution networks.
Equipped with an integrated digital media player, the SSB-120DP allows direct playback of MP3 audio tracks via front-panel USB flash drives and SD/MMC memory cards. Track navigation and volume adjustment can be controlled locally or via the supplied wireless infrared remote control (it requires batteries; they are not included).
For multi-zone loudspeaker connectivity, the unit provides comprehensive low-impedance terminal taps for 4-Ohm, 8-Ohm, and 16-Ohm loudspeaker arrays, alongside 70V and 100V high-impedance distributed line matching outputs. A 5-LED visual array on the front face provides real-time visual output level monitoring to prevent audio clipping and signal distortion.
Dual-source operational design permits continuous running from 220V to 240V AC mains (50/60 Hz) or a 12V DC power source. The internal circuitry features automatic switchover to an external 12V DC battery line (external battery is not included) upon AC mains disruption, maintaining continuous operation for critical emergency announcement setups.
Enclosed in a heavy-gauge steel desktop chassis with dimensions of 420 x 135 x 295 mm and weighing 11.0 kg, the amplifier includes cut-and-boost bass and treble rotary tone potentiometers. Preamp outputs (200mV / 600Ω) and standard 1V / 1kΩ line outputs enable direct interconnection with external booster power amplifiers or recording devices in medium-sized institutional and commercial audio systems.

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Product Information .

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

Ahuja SSB-120DP System Compatibility & Audio Interfacing Guide

The Ahuja SSB-120DP medium-wattage public address mixer amplifier is engineered for seamless electrical, acoustic, and system-level interoperability within industrial, commercial, institutional, and assembly environments. Designing a public address infrastructure around the SSB-120DP requires matching speaker line impedances, input source levels, power distribution feeds, and downstream signal processors to its rated electrical specifications.

Loudspeaker Load Matching & Distributed Line Compatibility

The amplifier output stage supports both direct low-impedance acoustic circuits and high-impedance distributed constant-voltage lines:

Low-Impedance Taps (4Ω, 8Ω, 16Ω): Ideal for direct connection to standard low-impedance PA loudspeakers, driver units, or cabinet speakers. Connected speaker networks must be calculated in series, parallel, or series-parallel topologies to strictly match 4Ω, 8Ω, or 16Ω impedance loads without dipping below minimum rated values.
Constant-Voltage Line Outputs (70V and 100V): Intended for multi-speaker distributed audio networks in commercial facilities, workshops, and large buildings. Connected speakers must incorporate 70V or 100V line-matching transformers wired strictly in parallel. The aggregate power tap wattage of all connected speakers must not exceed the amplifier's rated continuous capacity of 120W RMS (with a maximum peak output headroom of 160W RMS).
Load Regulation: Output regulation is maintained at ≤ 2 dB from no-load to full-load conditions at 1 kHz, ensuring stable voltage delivery across distributed speaker circuits.

Audio Input Channel Interfacing

The integrated mixer section provides 7 discrete wired input channels designed to interface with standard analog sound equipment:

Microphone Inputs (5 Channels): Rated at 0.65 mV input sensitivity with a 4.7 kΩ input impedance, accommodating standard dynamic public address microphones via wired 6.3mm phone jack connections.
Auxiliary Inputs (2 Channels): Rated at 100 mV input sensitivity with a 470 kΩ input impedance, compatible with standard line-level audio playback equipment, including external CD/media players, preamplifiers, tone generators, and audiovisual signal feeds.

System Expansion: Booster Amplifiers & Recording Gear

For scalable PA architectures requiring elevated output wattage or localized monitoring and archival feeds, the unit provides dedicated pre-power line interfacing:

Line Output (1V / 1kΩ): Compatible with external slave power amplifiers and booster units, enabling line-level audio distribution to expand sound coverage across large industrial complexes without signal degradation.
Preamplifier Output (200mV / 600Ω): Provides an unamplified pre-master audio feed compatible with external recording equipment, secondary zone mixers, and audio monitoring units.

Digital Media & Storage Card Interfacing

The integrated digital audio player reads standard MP3 audio files directly from external solid-state storage media:

USB Port: Compatible with standard FAT-formatted USB flash drives for direct MP3 playback.
SD/MMC Slot: Compatible with standard SD and MMC memory cards.
Infrared Remote Control: Allows wireless transport control of the digital player section; the handheld remote requires cells (they are not included).

Power Infrastructure & 12V DC Battery Backup Interoperability

The SSB-120DP features dual-mode power sourcing for uninterrupted industrial and emergency operation:

AC Mains Operation: Operates on standard 220–240V AC (50/60 Hz) utility lines with a nominal power consumption of 250VA.
DC Standby & Failover: Compatible with 12V DC external power sources, including 12V automotive batteries (they are not included) and industrial 12V battery banks (they are not included), drawing up to 5.5A under full load. The unit incorporates automatic changeover circuitry that instantly transfers operation from AC mains to DC battery power upon utility power failure.

Interfacing Parameters Summary

Interface Type	Channel / Port	Electrical Specification / Impedance	Connected Equipment Compatibility
Microphone Input	Mic 1 to Mic 5	0.65 mV / 4.7 kΩ	Dynamic wired PA microphones
Auxiliary Input	Aux 1, Aux 2	100 mV / 470 kΩ	Line-level audio players, AV feeds, tuners
Digital Media	USB / SD / MMC	MP3 digital format	Solid-state USB drives & SD/MMC cards
Line Output	Line Out	1 V / 1 kΩ	External booster & slave power amplifiers
Preamp Output	Preamp Out	200 mV / 600 Ω	Recording devices, secondary mixers
Speaker Taps	Low-Z Direct	4Ω, 8Ω, 16Ω	Direct-coupled low-impedance PA speakers
Speaker Taps	High-Z Line	70V, 100V Line	Transformers-equipped distributed speakers (up to 120W RMS)
DC Power Port	12V Battery Terminals	12V DC (5.5A consumption)	12V external/automotive batteries (they are not included)

Ahuja SSB-120DP Installation & Integration Guide

Chassis Placement and Ventilation Requirements

The Ahuja SSB-120DP public address mixer amplifier is engineered for bench, tabletop, or equipment shelf mounting. The physical chassis dimensions are 420 mm (W) x 135 mm (H) x 295 mm (D) with an approximate net weight of 11.0 kg. Ensure the unit is positioned on a flat, stable, and rigid surface capable of supporting its weight without mechanical deflection.

Maintain at least 50 mm to 100 mm of clear airspace around the side and rear ventilation louvers. Avoid placing heat-generating equipment directly above or beneath the amplifier. Prevent exposure to excessive dust, high ambient humidity, direct sunlight, and liquid ingress to safeguard internal circuitry and transformer assemblies.

Dual Power Supply Wiring (AC Mains and 12V DC Failover)

The amplifier features a dual-supply architecture allowing operation from AC mains or an external DC battery source:

AC Mains Operation: Connect the integrated AC power cord to a regulated 220–240V AC (50/60 Hz) grounded supply. Full-load AC power consumption is rated at 250VA.
12V DC Battery Connection: For uninterrupted public address operation during power outages, wire the rear DC terminal block to a 12V battery system (such as a 12V automotive battery or stationary DC backup bank). Rated DC current draw is 5.5A under peak loading. Ensure correct polarity: connect positive (+) to the red terminal and negative (-) to the black terminal.
Automatic Changeover: When both AC and DC sources are connected, the amplifier prioritizes AC mains. Upon AC failure, internal circuitry instantly transfers operation to the 12V DC supply without interrupting audio delivery.

Loudspeaker Load Matching and Wiring Topologies

The SSB-120DP provides flexible speaker output options on its rear terminal barrier strip, accommodating both low-impedance voice-coil loads and constant-voltage distributed speaker networks. Do not connect low-impedance and constant-voltage line terminals simultaneously.

Low-Impedance Connections (4Ω, 8Ω, 16Ω): Connect the common speaker lead to the 'COM' terminal and the positive lead to the matching impedance terminal (4Ω, 8Ω, or 16Ω). Calculate the total series/parallel network impedance precisely to ensure it matches the selected terminal tap. Connecting a net load lower than the terminal rating can overload the power output stage.
Distributed Line Connections (70V / 100V): For long-distance audio distribution in commercial, industrial, or institutional buildings, connect line-matching transformer (LMT) equipped loudspeakers in parallel between 'COM' and either the '70V' or '100V' tap. The sum of all transformer power tap ratings across the line must not exceed the amplifier's rated output of 120W RMS (with a maximum capacity of 160W RMS).

Input Cabling, Line Outputs, and Media Player Setup

Route all input and auxiliary interconnects prior to energizing the amplifier:

Microphone Channels (Mic 1–5): Connect dynamic microphones to the front and rear 6.3 mm unbalanced input jacks (rated input sensitivity 0.65mV at 4.7kΩ input impedance).
Auxiliary Channels (Aux 1 & Aux 2): Feed line-level sources (e.g., CD players, external media receivers, audio mixers) into the Aux input jacks (rated sensitivity 100mV at 470kΩ).
Line & Preamp Outputs: Use the 1V / 1kΩ Line Out terminal to link additional booster amplifiers when system expansion is required. Use the 200mV / 600Ω Preamp Output to feed audio recording devices or secondary signal processors.
Digital Media Player: Insert a compatible USB flash drive or SD/MMC storage card loaded with MP3 audio files into the integrated front-panel reader. Operate playback using front-panel keys or the supplied infrared remote control. If using the handheld remote control, install the required cells (they are not included).

Pre-Commissioning and Calibration Procedure

Before applying power, turn all input gain potentiometers (Mic 1–5, Aux 1–2, and Master) fully counter-clockwise. Set Bass and Treble tone controls to their center (neutral) positions.

Turn on the main power switch and verify the AC/DC indicator. Slowly advance the Master control and individual input knobs while speaking into microphones or playing media tracks. Monitor the 5-LED output level array to verify signal presence, ensuring the level meter does not stay permanently saturated in the peak zone. Adjust Bass and Treble controls (providing cut and boost adjustments across the 50 Hz to 15,000 Hz operating range) to achieve speech intelligibility and acoustic balance for the venue.

Ahuja SSB-120DP Operational Deployments & Engineering Applications

The Ahuja SSB-120DP 120W medium-wattage public address mixer amplifier is engineered for continuous B2B and institutional sound reinforcement. With support for 5 dynamic microphone inputs, 2 auxiliary line inputs, low-impedance (4Ω, 8Ω, 16Ω) and constant-voltage (70V, 100V) speaker outputs, and dual AC/DC power options, it integrates reliably into a broad range of facility audio architectures.

Industrial Plants, Warehouses, and Workshop Paging

In manufacturing environments, industrial fabrication shops, and logistics hubs, audible voice clarity over ambient floor noise is critical for operations and facility safety. The SSB-120DP provides a rated 120W RMS power output (up to 160W RMS maximum) across a 50 Hz to 15,000 Hz frequency range, driving high-efficiency 70V or 100V line-matching transformer speaker and horn networks over extended cable runs without line loss.

Emergency Failover: Supports automatic changeover to external 12V DC battery power (5.5A consumption; batteries are not included) during 220–240V AC mains interruptions to maintain uninterrupted public address capability.
Visual Monitoring: Integrated 5-LED visual output array allows plant engineers to monitor audio drive levels and prevent clipping distortion.

Educational Campuses, Auditoriums, and Assembly Halls

Schools, colleges, and training auditoriums require balanced voice reproduction across wide seating areas alongside automated audio playback. The mixer section accommodates up to 5 microphone inputs (0.65mV / 4.7kΩ) for podiums, panel desks, and stage presenters, alongside 2 auxiliary inputs (100mV / 470kΩ) for multimedia players.

Integrated Media Playback: Front-panel digital player accepts USB flash drives and SD/MMC media for pre-recorded school bells, announcements, and event playback, operable via front-panel controls or an IR remote control (remote cells are required; they are not included).
Archive Recording: Built-in preamplifier output (200mV / 600Ω) feeds external recording equipment or secondary audio circuits to archive assemblies, lectures, and proceedings.

Places of Worship and Multipurpose Community Centers

Houses of worship and multipurpose halls demand high speech intelligibility, multiple simultaneous open microphones, and tone adjustment to match architectural acoustics. The SSB-120DP features dedicated cut-and-boost bass and treble tone controls (±8dB/±10dB at 100Hz and 10kHz) to eliminate room boominess and enhance vocal articulation.

Low-Impedance & Multi-Zone Support: Direct 4Ω, 8Ω, and 16Ω terminal connections accommodate low-impedance distributed wall speaker clusters for close-proximity sound coverage.
System Expansion: Built-in 1V / 1kΩ line output interfaces directly with high-power booster amplifiers to scale audio coverage across overflow halls, courtyards, and perimeter zones.

Commercial Complexes, Corporate Offices, and Retail Facilities

For corporate buildings, commercial showrooms, and multi-tenant complexes, the amplifier delivers background music (BGM) and zone paging through its dual auxiliary inputs and mixed mic channels. The ≤ 2 dB output regulation ensures uniform sound pressure levels across all connected 100V ceiling speakers as individual speaker taps are activated or adjusted.

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