• 58424_TOA-900-Series-Microphone-Input-Module-Balanced-Transformer-Input-_-Compressor_ALT01sqr
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TOA 900 Series Microphone Input Module Balanced Transformer Input | Compressor

TOA 900 Series Microphone Input Module Balanced Transformer Input | Compressor

SoundPro Item: 58424 | Part Number: M-61S T

$134.00
$166.00 $134.00
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MSRP: $166.00 | MAP: $134.00

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  • Transformer-Balanced Input Rejects Common-Mode Noise For Clean Mic Signal Pickup
  • Selectable Phantom Power Supports Both Condenser And Dynamic Microphone Types
  • High-Cut And Low-Cut Filters Shape Tone Directly At The Input Stage
  • Adjustable Gain Matches Sensitivity To A Wide Range Of Microphone Outputs
  • Power Supplied By The 900 Series Main Frame Simplifies Module Installation
  • Available With Multiple Connector Types To Suit Varied Installation Requirements
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The TOA 900 Series Microphone Input Modules are modular mic preamp cards designed for integration into TOA 900 Series main frames and compatible equipment. Each module accepts a balanced, low-impedance microphone signal through a transformer-isolated input, delivering clean gain with a low noise floor suited to demanding installed sound environments. These modules are the building block for multi-zone paging, conference systems, house-of-worship audio, and commercial installation projects where consistent mic performance and system-level control are required.

The module family covers a wide range of connectivity and control options, allowing integrators to specify the exact input configuration and control behavior their installation demands without adding external hardware. Selectable phantom power accommodates condenser microphones, while independent high-cut and low-cut filters handle room acoustics and vocal intelligibility at the source before the signal reaches the main frame. The 900 Series modular architecture means these cards slot directly into the frame's expansion bays, keeping rack space efficient and wiring organized.

Compared to generic rack-mount mic preamps, these modules benefit from native 900 Series integration: power is supplied by the main frame, gain and tone adjustments are made at the module level, and certain variants add muting, remote volume, or compression functions that work within the TOA system's control bus. For integrators specifying permanent installs in boardrooms, airports, retail environments, or performance venues, the 900 Series mic input module range provides a scalable, purpose-built solution.

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Specifications

Electrical
Power Supply
24 V DC (supplied from the main frame)
Current Consumption
33 mA
Phantom Power
+22 V DC (for condenser-type)
Audio
Input Sensitivity
-60 dB* (rated output: -20 dB*), adjustable: -72 to -52 dB*
Input Impedance
600 Ω, balanced transformer-isolated
Frequency Response
25 Hz - 20 kHz ±1.5 dB
Distortion
0.1% or less (1 kHz, output: -60 dB*)
Noise Level
-86 dB* (20 Hz - 20 kHz BPF), input equivalent noise: -126 dB*
Gain
32 - 52 dB
Tone Control
100 Hz: 0 to -10 dB, 10 kHz: 0 to -10 dB
Signal Muting Level
20 dB (Threshold adjustable input level: -66 to -46 dB*)
Connectivity
Connector
Removable terminal block (3P)
Dimensions
Width
35 mm (1.38")
Height
78 mm (3.07")
Depth
88 mm (3.46")
Weight
Unit Weight
Max. 110 g (0.24 lb)

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