Description
TOA B-01 Bridge Transformer Module 10kΩ Input -1dB for A-903MK2 Mixer Amp
The TOA B-01 is a plug-in bridge transformer (BRG TRANS) module designed for use in TOA mixer/power amplifier systems. It provides a 10kΩ input impedance with a fixed gain of -1dB, functioning as a passive input stage interface within the amplifier chassis. This unit was pulled from a TOA A-903MK2 30-watt Mixer/Power Amplifier.
Specifications & What's Included
- Manufacturer: TOA Corporation
- Model: B-01
- Module type: Bridge Transformer (BRG TRANS)
- Input impedance: 10kΩ
- Gain: -1dB
- Connectors: Three numbered binding post / screw terminals (labeled 1, 2, 3) on front panel
- PCB board markings: IB-01-394-4 / B-01-11
- Country of manufacture: Japan (Made in Japan label confirmed)
- Form factor: Plug-in card/module for TOA chassis slot
- Compatible with: TOA A-903MK2 30-watt Mixer/Power Amplifier
- Module only — no cables or mounting hardware included
Applications
TOA's modular mixer/power amplifier systems, such as the A-900MK2 series, use plug-in input modules to configure the amplifier for different signal sources and impedance requirements. The B-01 bridge transformer module serves as a balanced input interface, matching source impedance to the amplifier's internal circuitry and providing a slight attenuation of -1dB. This type of module is used in commercial and professional audio installations — background music systems, paging systems, and installed sound in venues — where TOA A-900 series amplifiers are still widely deployed. Replacement or spare modules like this are sought by installers and service technicians maintaining existing TOA installations.
This TOA B-01 Bridge Transformer Module was pulled from a TOA A-903MK2 30-watt Mixer/Power Amplifier where it was previously in service. It has not been powered up or tested at our facility. The front panel and connectors appear clean, and the PCB shows no obvious damage. Some light handling wear is typical for a pulled module of this type. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
TOA |
Model: |
B-01 |
MPN: |
B-01 |
Type: |
Bridge Transformer Module |
SKU: |
17229 |
Compatible With: |
TOA A-903MK2 Mixer/Power Amplifier |
Input Impedance: |
10kΩ |
Gain: |
-1dB |
Module Designation: |
BRG TRANS (Bridge Transformer) |
Form Factor: |
Plug-in Module / Card |
Connector Type: |
3x screw-terminal / binding post connectors (numbered 1, 2, 3) |
Country/Region of Manufacture: |
Japan |
Seller Notes: |
Module only — no cables or mounting hardware included. |
Condition Notes: |
This TOA B-01 Bridge Transformer Module was pulled from a TOA A-903MK2 30W Mixer/Power Amplifier. Not powered or tested at our facility. Panel and connectors appear clean; PCB shows no obvious damage. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |