• 67891_TOA-ZM-104A-Impedance-Meter-For-Speaker-Lines_ALT01sqr
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TOA ZM-104A Impedance Meter For Speaker Lines

TOA ZM-104A Impedance Meter For Speaker Lines

SoundPro Item: 67891 | Part Number: ZM-104A

$624.00
$772.00 $624.00
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MSRP: $772.00 | MAP: $624.00

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  • Three Selectable Ranges Cover Speaker Impedances From 5 Ohms to 100 Kilohms
  • Battery-Powered Operation Enables Field Use Without AC Power Access
  • 1 kHz Oscillator Provides a Consistent Audio-Frequency Test Signal
  • Direct-Reading Analog Meter Delivers Immediate On-Site Results
  • Includes Carrying Case and Test Leads for Ready-to-Deploy Portability
  • Graphic Impedance-to-Power Conversion Table Supports Distributed Audio Checks
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The TOA ZM-104A is built for audio installers and system technicians who need to verify speaker line impedance during installation, commissioning, or troubleshooting without access to a bench. Operating on four AA batteries and delivering up to 60 hours of continuous runtime, it supports fieldwork in venues, houses of worship, commercial installs, and distributed audio systems where AC power is inconvenient or unavailable.

Three selectable measurement ranges cover 5 ohms to 100 kilohms, making the ZM-104A suitable for both low-impedance speaker verification and high-impedance 70V and 100V line checks across long cable runs. A built-in 1 kHz oscillator provides a consistent test signal, and the direct-reading analog meter delivers results without requiring conversion tables beyond the included graphic impedance-to-power reference. The carrying case and test leads are included, keeping the unit ready to deploy without additional accessories.

Compared to general-purpose multimeters, the ZM-104A is purpose-designed for speaker circuit measurement, with ranges and readout calibrated specifically for audio load values. For installed sound teams, touring system technicians, and AV integrators who regularly qualify speaker wiring before system handoff, it eliminates the guesswork that comes from adapting non-audio test equipment to audio line verification tasks.

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Specifications

Electrical
Power Source
R6 x 4 (1.5 V DC x 4)
Current Consumption
39 mA
Performance
Measurement Range
x 1 range: 5 Ω - 1 kΩ; x 10 range: 50 Ω - 10 kΩ; x 100 range: 500 Ω - 100 kΩ
Oscillation Frequency
1 kHz, ±10 %
Reading
Direct reading meter, unit: Ω
Measurement Category
CAT I
Battery Life When Continuously Used
x 1 range: 30 h; x 10 range and x 100 range: 60 h
Dimensions
Unit Width
4.33"
Unit Height
7.09"
Unit Depth
2.28"
Carrying Case Width
4.80"
Carrying Case Height
8.74"
Carrying Case Depth
2.76"
Weight
Weight (With Case, Without Batteries)
1.61 lbs
Construction
Finish
ABS resin, black
Environmental
Operating Temperature
23 °F to 104 °F (-5 °C to +40 °C)
Included Items
Included Accessories
Test leads, 1 set; carrying case

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