{"product_id":"vtl-mb-300","title":"VTL MB-300","description":"\u003cp\u003eThe amplifier features a large capacitor bank in the power supply, suggesting a need for a variac for safe startup.  The MB-300 has test points and a trimmer for bias adjustment, with some models potentially offering internal biasing procedures.  Early versions of the MB-300 had a switch and meter on the front panel for bias adjustment, while later Signature models might have an internal adjustment.  The MB-300 was later updated to the MB-450 Signature model, with cosmetic changes and an additional power supply for the driver stage, while maintaining the same power output.\u003c\/p\u003e\n\n\u003cp\u003eype: Tube Monoblock Power Amplifier Power Output: 300W (no load specified) Tube Complement: 12AT7, 12BH7, and 6550 (x8) Bias: Fixed-biased at class-A1 Power Supply: 550V with 1650uF of storage capacitance Input Sensitivity: 775mV RMS Source Impedance: 0.1 ohm Dimensions: 19\" W x 10\" H x 22\" D (estimated from similar models) Weight: 75 lbs each\u003c\/p\u003e","brand":"VTL","offers":[{"title":"Default Title","offer_id":59370780885337,"sku":"2701","price":3690.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1066\/5721\/8905\/files\/vtl-mb-300-1.jpg?v=1789119440","url":"https:\/\/wenwaudio.com\/products\/vtl-mb-300","provider":"W\u0026WAudio","version":"1.0","type":"link"}