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    SKU: BSTK-BK-100W70T

    BSTK 100W70T100W Max 70V Commercial Audio Transformer (100W, 80W, 60W, 40W and 20W Taps)

    Open Box
    Purchase Open Box - 100W Max 70V Commercial Audio Transformer (100W, 80W, 60W, 40W and 20W Taps)
    • Outdoor Speaker Depot SKU: BSTK-BK-100W70T
    • Less then 5 - Order Now!


      Compare at: $49.99
      You Save: $20

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    Uncover unbeatable value with our Open Box item—rigorously inspected, quality-assured, and performance-tested for an exceptional audio experience. Take advantage of this excellent deal, where a minor packaging imperfection translates into a significant discount on your premium Outdoor Speaker Depot product.


    • Eliminates power loss between amplifiers and speakers
    • Allows longer speaker runs on large indoor installations
    • Includes 100V primary amplifier input and 8 and 4-ohms secondary speaker output
    • Easily connects between the speaker and amplifier
    • Includes 100W, 80W, 60W, 40W and 20W taps
    • Works with audio and PA amplifiers
    • Includes self-adhesive pad

    Transform your 8-ohm speakers into high-powered 70V line speakers with the OSD Black BK-100W70T line matching indoor audio transformer. With taps ranging from 20W to 100W, you can deliver robust audio to your speakers even at great distances. The BK-100W70T features a full range frequency response of 20Hz to 20kHz and eliminates power loss between amplifiers and speakers. This line matching transformer includes a 100V primary amplifier input and 8 and 4-ohm secondary speaker outputs, making it easy to connect between your speaker and amplifier. The BK-100W70T also includes a self-adhesive pad for quick and easy installation and a wide range of tap options to customize your audio setup.

    Warning: California's Proposition 65


    This product can expose you to chemicals, including vinyl chloride, which is known to the State of California to cause cancer. For more information, go to

    • Primary Voltage: 70V
    • Power Rating: 100W
    • Primary Taps: 100, 80, 60, 40, 20W
    • Secondary Impedance: 8, 4 ohms
    • Insertion Loss: 1dB
    • Freq Response: 20Hz - 20kHz ± 1 dB
    • Mounting Dim: 3.94"W x 2.76"0 x 2.76"H

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