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1950s Magnatone Maestro 150 Vintage Tube Amp 1x15, Serviced & Clean w/ Jensen P15P


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Up for sale, a 1950's Magnatone Maestro 150 in excellent condition and in perfect working order. One of Magnatone's rarest amplifiers (especially in this condition), the Maestro 150 is a particularly large combo for the Magna Electronic Co era of Magnatone production with a single alnico magnet 15" Jensen speaker. The 25 watt two channel circuit is a dual rectified design driven by a pair of 6L6 power tubes.

This amp offers tons of muscle and very early breakup on both channels (Channel 2 offering just a bit more clean headroom). The amp excels at thick, chewy overdriven roar with ample low end fullness and bloom thanks to the 15” speaker and open back cabinet design.

The Treble/Bass EQ knobs have good range for sculpting the sound as needed, and even with the Bass knob all the way down, the amp has ample low end. Turning this knob up yields a somewhat loose, ripping quality to the overdriven signal (in a very good way), and the Treble knob adds additional cut and sizzle while still being sweet-sounding no matter where it’s set.

The point-to-point circuit has been given a fresh checkup by our techs here at Mike & Mike's Guitar Bar, retaining the original pair of transformers. The preamp has been fitted with numerous modern Sprague and Mallory signal caps, while the majority of the resistors are original. Pots are a combination of original and modern components, and a three-prong power cable has also been installed. The tube complement includes a freshy biased pair of new Tung Sol small bottle 5881 (6L6GC) power tubes, with a pair of matching 5Y3 rectifiers and all vintage valves in the preamp.

The speaker is an era-correct Jensen P15P alnico magnet driver dating to 1959. The speaker has a clean frame, professional recone, and original bell cover with foil Jensen sticker. The tube chart is also intact inside the cabinet and in great shape.

The cabinet retains its exceedingly clean original smooth tan covering, with a bit of light wear on the original leather corners. The bright turquoise faceplate shows some light wear, complete with a full complement of white chicken head knobs. The leather handle is a modern replacement.