Bias Master system BM4 Measures Bias current of the vacuum tubes in your amp. Includes 4 probes and englishgerman 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..

THREE SPEED BELT-DRIVEN TURNTABLE - This 3-speed 33 13, 45, 78 rpm suitcase record player features UPGRADED PREMIUM SOUND QUALITY and sits on sound isolating feet that prevent vibration. It is perfect for your living room, bedroom or office.. TAKE YOUR TUNES ANYWHERE - Housed in a vintage suitcase with an easy carry handle, Victrola's blend of retro and contemporary design give you the ultimate flexibility to listen to music where you want and how you want a great choice for vinyl lovers. Clean only with a dry cloth. EXPANDED CONNECTION OPTIONS - Stream smartphone audio through the turntables built-in Bluetooth speakers. Easily connect external speakers via the stereo RCA outputs, or use the Line input for non-Bluetooth devices like a CD player. For personal listening, connect your headphones to the headphone jack.. NO STEREO SYSTEM OR EXTRA EQUIPMENT REQUIRED. Get it up and running in minutes. Retro looks combined with the convenience of modern technology makes this affordable record player ideal for beginners vintage enthusiasts. ALL THE CONTROLS YOU NEED - Features an Input select knob, PowerVolume Knob an Auto stop switch that stops spinning records once the record is finished playing.. A RECORD PLAYER THAT SUITS YOUR PERSONALITY - Combined with Victrolas unparalleled sound quality and exquisite craftsmanship, and a wide range of styles, patterns and colors to choose from, get ready to create lifelong music memories.