Bias Master™ - TAD, tube tester, with 4 probes

Bias Master™ - TAD, tube tester, with 4 probes

Tube Amp Doctor (TAD)
Pictured: Octal
Pictured: Octal
Pictured: Noval
Pictured: Noval
Customer image:<br/>"Love my TAD Bias Master"
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Pictured: OctalPictured: Noval
Customer Images:
Customer image: "Love my TAD Bias Master"
$228.95
In Stock

Bias Master™ system BM4 Measures Bias current of the vacuum tubes in your amp. Includes 4 probes and english/german operation manual.

The Bias Master™ allows you to monitor the bias current safely and easily. While adjusting the Bias control pot of your amp, the Bias Master™ shows the actual result. This lets you set and evaluate the full reasonable biasing range your amp and tubes offer to find and set your personal perfect choice.

The Bias setting has a dramatic impact on the amp's response, break-up and dynamic character.

Probe Type Measures
Octal 6L6GC, 6550, EL34, 6V6GT, 5881, KT66, KT88, KT90, KT100, KT120, 7027A
Noval EL84 types

For additional probes (for testing other types of tubes), see S-TBMA2-X

SKU:
S-TBM4-X
Item ID:
039836
Brand:
Tube Amp Doctor (TAD)
Part Numbers
Probe TypeOur Part NumberUPC/EAN
OctalS-TBM4841358106163
NovalS-TBM4-EL84841358106170
Item Height2.1 in.
Item Length5.76 in.
Item Width3.6 in.
Packaging Information
Packaging Dimensions8 in. × 5 in. × 3.75 in.
Weight (Packaging)Noval versionS-TBM4-EL840.9105 lbs.
Octal versionS-TBM41.0428 lbs.
S-TBM4 - Octal versionItem Height2.1 in.
Item Length5.76 in.
Item Width3.6 in.
S-TBM4-EL84 - Noval versionItem Height2.1 in.
Item Length5.76 in.
Item Width3.6 in.
PDF: Operation ManualAll Models

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Specifications, Files, and Documents

PDF: Operation Manual Operation Manual67.08 KB
Questions? Contact us at [email protected], or give us a call at 480-820-5411

Product Reviews

5.00 out of 5 based on 1 reviews
Gary Johns - December 30th, 2021
5 out of 5

Finally got myself one of these, after wanting one for quite some time. I can now easily check and set the bias on my amps, and the TAD Bias Master makes it very enjoyable. Thanks to TAD and AES.