The Alessandro Bias Meter: After all is said and done, few components are as critical to the quality of your sound and tone as your power tubes. Improperly balanced and biased tubes can wreak havoc with your amp's overall performance, and more importantly with your sound, guitar or tube hi-fi. Unbalanced tubes will draw unequal amounts of current, wont sound as musical, and can emit an audible hum. But the Alessandro Bias and Matching Meter lets you regain control over your amp's sonic output. It is simple and quick to use and works with 6L6, 6V6, 5881, EL34, 7581, 7591, 7027, KT66, KT77 , KT88 and 6550 power tubes. Plus any octal tube with the Plate (high voltage) on pin number 3. Simply install the power tubes into the amp "through" the bais sockets, turn the amp on , then check and adjust the bias. Its fast, accurate and easy. It makes it simple for even a do-it-yourselfer to bias and balance the tubes in any amp. Don't pay your tech every time you change your tubes, use the Alessandro Bias meter and do it yourself. Remember to follow all safety rules regarding high voltage and that output tubes get hot and should be handled with an oven mit.

The most easy to use bias meter on the market. Designed by famous boutique guitar amp maker, George Alessandro

Remarkably quick and east to use. Two large analog meters for fast reading of bias for both tubes in circuit

Works with 6L6GC, 5881, KT66, 6V6GT, EL34, 6CA7, KT77, 7581, 7591, 7027, 6550, KT88 output tubes or any octal power tube with the Plate on pin 3

Includes long leads and heavy-duty socket adapters. Requires no batteries, no caliibration and no maintenance

Comes with complete operating instructions and 90 day warranty