Ahuja TZA 7000 700W Two Zone PA Amplifier front panel with LED bar graph display and control dials

2 Zone PA Amplifier TZA 7000

KTI14002001TZA7

Product Description

The Ahuja TZA-7000 is a heavy-duty 700-Watt Two Zone Public Address Power Amplifier engineered for commercial sound reinforcement, multi-speaker zoning, and public address installations requiring independent zone volume balancing.

Make / Brand: Ahuja
Model: TZA-7000
Rated Power Output: 700W Total (350W + 350W RMS at 10% THD; 300W + 300W RMS at 5% THD; 280W + 280W RMS at 2% THD; 500W + 500W Max)
Input Channels: 6 x Mic (0.6mV/4.7kΩ), 2 x Aux (100mV/470kΩ), Stereo L/R (200mV/100kΩ), Line L/R (1V/50kΩ)
Frequency Response: 50 Hz – 15,000 Hz (±3 dB)
Signal-to-Noise Ratio: 60 dB
Tone Controls: Bass ±10 dB at 100 Hz, Treble ±10 dB at 10 kHz
Outputs: Preamp (200mV/600Ω), Line (1V/1kΩ)
Speaker Output Taps: 4Ω, 8Ω, 70V, and 100V per zone
Output Regulation: ≤ 2 dB (no load to full load at 1 kHz)
Operating Power: AC 220–240V 50/60Hz; DC 36V (3 x 12V Car Battery (they are not included))
Power Consumption: AC 1100VA, DC 13A
Protection: Resettable circuit breaker against overload and short circuit
Dimensions & Weight: W510 x H185 x D (they are not included)470 mm; Net Weight: 39.8 kg

KTI14002001TZA7

Price

₹ 47,444.40 excl. GST

+ 18.00% Tax + Freight Charge

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Product Details
Available Brands	Ahuja
Unit	Numbers
HSN Code	85184000
Weight	39.8 kg
Dimension	L 47 x W 51 x H 18.5 cm cm ft in m
Warranty	12 Months No-Onsite Warranty
Resources	Download Specification
Tags/categories	Automation PA Solutions Amplifiers, Speakers

Usually dispatched within 8 days

About this product .

The Ahuja TZA-7000 is a high-output 700W dual-zone public address power amplifier housed in a robust metal chassis designed for continuous industrial, commercial, and institutional audio delivery. Its heavy-duty construction ensures resilience in fixed audio racks, control rooms, and mobile event environments.
Featuring dual-zone power architecture, the unit delivers up to 350W + 350W RMS power output with tight voltage regulation (≤ 2 dB from no load to full load at 1 kHz). Each zone can be independently switched on or off and driven with low-impedance 4-Ohm / 8-Ohm loudspeaker groups or high-impedance 70V / 100V line-matching distributed speaker lines.
The amplifier is equipped with versatile mixing capabilities including 6 mono microphone inputs, 2 auxiliary inputs, stereo L/R RCA connections, and dedicated line-level inputs. Dedicated preamplifier outputs facilitate audio recording interfacing, while line outputs permit daisy-chaining to auxiliary booster amplifiers.
A specialized Box Speaker / Driver Unit selector switch on each zone defeats low-frequency bass boost when toggled to the Driver Unit setting, protecting compression driver diaphragms from acoustic overload. Visual output levels are monitored in real time via responsive front-panel LED bar graph signal displays.
For mission-critical PA applications, the amplifier operates on 220–240V AC mains and supports instant automatic changeover to a 36V DC battery bank (3 x 12V Car Battery (they are not included)) during power outages. Overload and short-circuit protection is handled by a built-in resettable circuit breaker, ensuring quick operational recovery without fuse replacements.

Product Information .

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

System Interconnect, Loudspeaker Load, and Power Compatibility for Ahuja TZA-7000

Loudspeaker Load and Output Line Compatibility

The Ahuja TZA-7000 dual-zone public address power amplifier provides dual-output terminal architecture configured to drive both low-impedance speaker arrays and high-voltage distributed speaker networks. Each zone operates independently, delivering 350W + 350W RMS at 10% THD (up to 500W + 500W Max) across dedicated terminal taps.

Loudspeaker network compatibility includes:

Low-Impedance Loudspeakers: Direct connection via 4Ω and 8Ω output taps on each zone for low-impedance sound reinforcement and cabinet speakers.
High-Voltage Distributed Lines: Integrated 70V and 100V line-matching transformer outputs per zone for distributed ceiling speakers, column speakers, and long-distance public address installations.
Acoustic Horn Driver Protection: Dedicated Box Speaker / Driver Unit selector switches for each zone. Setting the selector to the Driver Unit position defeats the ±10dB at 100Hz bass boost to protect acoustic horn driver diaphragms from low-frequency excursion damage.

Audio Input and Source Device Compatibility

The integrated preamplifier and mixer stage on the Ahuja TZA-7000 accepts multiple mono, stereo, and line-level inputs, allowing simultaneous integration with commercial audio sources and stage equipment:

Microphones: 6 × Mono Microphone inputs configured at 0.6mV sensitivity with 4.7kΩ input impedance.
Auxiliary Sources: 2 × Mono Aux inputs rated at 100mV sensitivity and 470kΩ impedance for background music players, tuners, or media interfaces.
Stereo Playback Equipment: Stereo L/R input rated at 200mV sensitivity and 100kΩ impedance for playback systems and DJ programmes.
External Audio Mixers: Line L/R inputs at 1V sensitivity with 50kΩ impedance for direct master output integration from external mixing consoles.
Digital Media Playback: Built-in MP3 digital player supporting direct playback via USB flash storage, SD cards, and MMC card media.

Downstream Audio and Booster Amplifier Interfacing

For system expansion and audio archiving, the Ahuja TZA-7000 features standard interconnect outputs compatible with industrial and commercial PA hardware:

Booster Amplifiers: Line Output terminals rated at 1V / 1kΩ per zone allow clean signal link-out to external booster power amplifiers.
Recording Devices: Dedicated Preamplifier output rated at 200mV / 600Ω provides an unamplified feed for recording units and archiving mixers.

Input/Output and Operational Specifications

Interface / Port	Input / Output Level	Impedance / Load	Mode / Compatibility
Mono Mic (1 to 6)	0.6mV	4.7kΩ	Dynamic Microphones
Mono Aux (1 & 2)	100mV	470kΩ	Line-level audio players
Stereo Input (L/R)	200mV	100kΩ	Stereo audio / DJ equipment
Line Input (L/R)	1V	50kΩ	Mixer console outputs
Preamp Output	200mV	600Ω	Audio recording units
Line Output	1V	1kΩ	Booster amplifiers
Speaker Outputs (Zone A & B)	70V, 100V	4Ω, 8Ω	Box speakers, Horns, Line transformers

Power Supply and Emergency DC Backup Compatibility

The TZA-7000 supports dual electrical power sourcing for high-reliability industrial and commercial applications:

AC Mains Operation: 220–240V AC at 50/60Hz with an operating power consumption rating of 1100VA.
DC Battery Operation: 36V DC via 3 × 12V Car Battery (they are not included) with a current demand of 13A, featuring instant transfer to DC backup power upon AC mains supply failure.

Installation and Wiring Guidelines for Ahuja TZA-7000 Two-Zone PA Amplifier

Chassis Placement and Mechanical Mounting

The Ahuja TZA-7000 is an industrial-grade dual-zone public address power amplifier measuring 510 mm (W) × 185 mm (H) × 470 mm (D) with a net chassis weight of 39.8 kg. Due to the high-density power transformer and dual-channel amplifier stage, ensure the unit is mounted on a structurally reinforced tabletop, equipment shelf, or standard audio rack with adequate mechanical support capable of carrying the amplifier's weight. Maintain clear airflow clearance around the chassis intake and exhaust vents to avoid thermal build-up during sustained high-output operation.

Primary AC Mains and 36V DC Battery Wiring

The TZA-7000 operates on dual power sources supporting primary AC mains and emergency DC battery operation:

AC Mains Connection: Connect the amplifier to a stable 220–240V AC, 50/60 Hz single-phase mains supply. The system draws up to 1100 VA under maximum operating loads.
DC Backup Power Connection: For uninterrupted public address operation during mains outages, connect a 36V DC battery bank composed of three 12V car battery (they are not included) units wired in series to the heavy-duty DC terminal strip. The amplifier draws up to 13A on DC operation.
Automatic Power Transfer: The internal power circuitry automatically and instantaneously switches over to 36V DC battery backup (they are not included) power upon AC line failure without signal dropping or manual switching.

Speaker Load Connections and Zone Impedance Matching

The amplifier delivers a total power output of 700 Watts (500W + 500W Max; 350W + 350W RMS at 10% THD, 300W + 300W RMS at 5% THD, and 280W + 280W RMS at 2% THD). Each zone features independent terminal taps offering flexible loudspeaker load matching:

Low-Impedance Systems: Connect direct low-impedance loudspeaker loads to either the 4 Ω or 8 Ω terminal taps for local high-fidelity sound reinforcement.
High-Impedance Distributed Lines: Wire long-distance distributed ceiling speakers, column speakers, or horn arrays using the 70V or 100V constant-voltage line output taps. Ensure the aggregate wattage of all line-matching transformers per zone does not exceed the zone rated RMS output. Output voltage regulation across both zones is ≤ 2 dB from no load to full load at 1 kHz.
Box Speaker / Driver Unit Selector Switch: Configure the rear selector switch for each zone depending on transducer type. Setting the switch to 'Driver Unit' automatically defeats the bass boost circuit, protecting acoustic driver diaphragms from destructive low-frequency over-excursion.

Input Interfacing and Audio Line Routing

Connect microphones, background audio sources, and external mixing consoles into the designated input channels:

Microphone Inputs: Connect dynamic microphones to the 6 × Mono Mic inputs rated at 0.6 mV sensitivity into 4.7 kΩ input impedance.
Auxiliary & Line Inputs: Terminate external media sources to the 2 × Mono Aux inputs (100 mV / 470 kΩ), Stereo L/R inputs (200 mV / 100 kΩ), or Line L/R inputs (1V / 50 kΩ).
Mixer & Booster Link: Utilize the dedicated Line Input and Line Output (1V / 1 kΩ) terminals on each zone to slave external booster amplifiers or accept feeds from master mixing consoles.
Preamp Output: Connect the dedicated Preamplifier output (200 mV / 600 Ω) to external audio recording devices for logging or archiving.

Tone Adjustment, System Monitoring, and Protection

Calibrate system audio response across the 50 Hz to 15,000 Hz (±3 dB) operating frequency spectrum using the independent front-panel Bass (±10 dB at 100 Hz) and Treble (±10 dB at 10 kHz) controls with an overall signal-to-noise ratio of 60 dB. Real-time audio levels can be monitored via the integrated LED bar graph signal display. In the event of an electrical short-circuit or continuous load overload across speaker lines, the integrated resettable circuit breaker trips instantly to protect internal amplifier output stages and can be manually reset once the external wiring fault is cleared.

Ahuja TZA-7000 Troubleshooting & Fault Diagnostic Guide

The Ahuja TZA-7000 dual-zone commercial power amplifier is engineered for continuous multi-speaker public address operation. When encountering signal interruption, distortion, or power delivery anomalies, field technicians can reference the following systematic diagnostics based on the amplifier's electrical specifications, zone routing controls, and integrated protection circuits.

Circuit Breaker Tripping and Overload Protection

The TZA-7000 incorporates a built-in resettable circuit breaker designed to protect the internal output stages against thermal overload, line shorts, and low-impedance fault conditions across its 700W total capacity (500W + 500W Max, 350W + 350W RMS at 10% THD).

Tripped Circuit Breaker: If the amplifier abruptly shuts down under load, inspect the speaker terminal connections for short circuits between positive and common terminals on the 4Ω, 8Ω, 70V, or 100V output taps of both Zone A and Zone B. Disconnect the speaker load and reset the rear-panel circuit breaker button.
Impedance Mismatch: Ensure that the connected low-impedance loudspeaker network does not drop below the selected 4Ω or 8Ω terminal rating per zone. For distributed high-voltage lines, verify that the total wattage of all 70V or 100V line-matching transformer taps does not exceed 350W RMS per zone (300W RMS at 5% THD, 280W RMS at 2% THD).
Excessive Current Draw: Confirm that total AC power draw does not exceed 1100VA, or 13A when operating on DC power.

No Audio Output or Inactive Zone Diagnostics

If the amplifier powers on but fails to deliver audio to connected loudspeakers, verify signal flow using the front-panel visual indicators and physical zone selectors:

Zone Switch Position: Check the dedicated Zone On/Off selector switches. If a zone switch is set to Off, audio routing to that zone's output taps (4Ω, 8Ω, 70V, 100V) is fully isolated.
LED Bar Graph Signal Display: Observe the LED Bar Graph signal display. If the LEDs show no activity while input sources are live, check the input channel level controls, master gain controls, and input source connections.
Input Sensitivity & Impedance Mismatch: Verify that input sources correspond to the proper channel ratings: Mono Mic inputs (0.6mV/4.7kΩ), Mono Aux inputs (100mV/470kΩ), Stereo L/R inputs (200mV/100kΩ), or Line L/R inputs (1V/50kΩ). Routing a low-level dynamic microphone into an Aux or Line terminal will result in inaudible or extremely low output.

Audio Distortion and Horn Driver Diaphragm Protection

Acoustic distortion or driver stress across the 50Hz to 15,000Hz (±3dB) frequency response range can be diagnosed and resolved via tone and load switch settings:

Driver Unit Protection Setting: When connecting horn driver units, ensure the Box Speaker / Driver Unit selector switch for that zone is set to 'Driver Unit'. This position defeats the low-frequency bass boost, preventing physical damage and voice-coil excursion failure in high-frequency horn drivers.
Bass/Treble Equalization Overdrive: Check tone control settings. The tone stage provides ±10dB at 100Hz for Bass and ±10dB at 10kHz for Treble. Excessive low-end boost near maximum master volume can overdrive input stages and cause THD to rise beyond standard operational thresholds.
Voltage Regulation Faults: The TZA-7000 maintains output voltage regulation of ≤ 2 dB from no load to full load at 1kHz. Distortion arising as additional speakers are toggled onto the 70V/100V line indicates excessive line resistance or total transformer load exceeding the amplifier's rated wattage.

Power Supply and DC Battery Backup Verification

The TZA-7000 supports dual-source power operation with automatic failover:

AC Mains Operation: Ensure the primary source supplies 220-240V AC at 50/60Hz with adequate current headroom for the 1100VA power consumption rating.
DC Battery Operation: When operating via DC backup, verify the connection of a 36V DC bank configured using 3 × 12V Car Battery (they are not included). Confirm correct polarity and cable gauge capable of sustaining a continuous 13A current load.
Instant Transfer Verification: If the unit fails to transition during an AC mains outage, verify that the 36V DC battery bank (they are not included) terminal voltage is not depressed below operating threshold under the 13A load.

Interfacing Line and Preamplifier Outputs

When chaining booster amplifiers, audio mixers, or external recording equipment:

Preamp Output Checks: Use the dedicated Preamp output (200mV/600Ω) strictly for recording devices or external line preamps. Connecting this terminal to high-impedance power amplifier inputs may yield low signal-to-noise performance relative to the unit's 60dB SNR specification.
Line Input/Output Loop: When slaving booster amplifiers, route signals through the dedicated Line Output (1V/1kΩ) and connect external mixing consoles to the Line Input (1V/50kΩ) terminals provided on each individual zone.

Industrial and Commercial Application Scenarios for Ahuja TZA-7000

Dual-Zone Commercial Facilities and Split Indoor/Outdoor Installations

The Ahuja TZA-7000 is engineered for commercial, industrial, and institutional premises requiring independent acoustic control across two segregated zones. With a dual-channel design delivering 350W + 350W RMS (up to 500W + 500W Max), system engineers can balance sound pressure levels separately between internal spaces (such as workshops, office corridors, or dining halls) and external areas (such as loading bays, parking zones, or perimeter grounds).

Each zone features dedicated Zone On/Off controls and independent low-impedance (4Ω, 8Ω) as well as high-impedance (70V, 100V) line-matching output taps. This flexibility allows facility managers to drive high-fidelity box speakers indoors while running distributed 100V horn speaker arrays over long cable runs outdoors without impedance mismatching or signal degradation.

Places of Worship, Auditoriums, and Multi-Room Conference Venues

In large gathering environments such as houses of worship, community halls, lecture theaters, and auditoriums, public address clarity and speech intelligibility are paramount. The TZA-7000 supports Mono operation to drive two separate loudspeaker clusters simultaneously from shared input sources, accommodating speech delivery across primary sanctuaries and overflow courtyards.

Extensive Microphone Connectivity: Features 6 Mono Mic inputs (0.6mV/4.7kΩ) and 2 Mono Aux inputs (100mV/470kΩ) for podium microphones, roving vocal mics, and instrument feeds.
Acoustic Optimization: Equipped with responsive Bass (±10dB at 100Hz) and Treble (±10dB at 10kHz) tone controls, alongside a ≤2 dB output regulation from no-load to full-load at 1kHz.
Audio Archiving: Dedicated preamplifier output (200mV/600Ω) enables direct feeds to recording consoles for archiving sermons, proceedings, or meetings without disturbing live speaker levels.

Horn Driver Protection in High-Ambient Industrial and Public Alert Systems

Facilities utilizing outdoor horn drivers and acoustic paging units benefit from the amplifier's integrated Box Speaker / Driver Unit selector switches. Switching to the Driver Unit mode automatically defeats low-frequency bass boost, safeguarding horn driver diaphragms from excessive mechanical excursion and thermal stress caused by low-end rumble.

DJ Programmes and Commercial Music Playback

The TZA-7000 provides a dedicated Stereo music operation mode tailored for DJ setups, commercial event sound reinforcement, and high-output background music systems. It accepts Stereo L/R inputs (200mV/100kΩ) and Line L/R inputs (1V/50kΩ) from media players, DJ mixers, or signal processors. Visual monitoring is maintained in real time via the integrated front-panel LED Bar Graph signal display.

Mission-Critical PA with Uninterrupted Battery Backup

For high-reliability safety and industrial installations requiring continuous communication during utility power outages, the TZA-7000 features dual-power operational support. The amplifier runs on standard AC mains (220–240V 50/60Hz, 1100VA) and incorporates instant, automatic changeover to 36V DC operation via 3 × 12V car batteries (they are not included), drawing 13A under full DC load. Equipment protection is reinforced by a built-in resettable circuit breaker against short-circuit and overload conditions.

System Expansion and Booster Amplifier Interfacing

For expansive industrial campuses requiring more than 700W total amplification, each zone of the TZA-7000 includes dedicated Line Input and Line Output (1V/1kΩ) jacks. This enables audio engineers to slave external booster power amplifiers or loop in external multi-channel audio mixers without requiring external signal splitters.

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