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MastersounD - Compact 300B - Integrated Amplifier (Class A)

MastersounD - Compact 300B - Integrated Amplifier (Class A)

MastersounD - Compact 300B - Integrated Amplifier (Class A)

The Compact 300 B integrated amplifier in pure class “A” which enhances the latest technical evolution of the famous triode 300 B. The output transformer we designed and manufactured for this triode allows us to reach a range of extension which would be otherwise impossible with the use of standard output transformers which need work with a negative reaction.

The result is a perfect sound stage and a surprising presence.

Our philosophy is simple:
We produce amplifiers that arouse emotion, in which every note of music should precisely reflect the emotions of the composer and the performer. In addition to the technical excellence, our amplifiers satisfy the ultimate search for the life-like performance. Therefore, not only a perfect soundstage, focus, and dynamics are involved, but also a "spirit" quite rare in many systems - blend into the total synergy of your system.

The listeners feel immersed in the music and carried away through enjoying the life-like details of the instruments, in the most natural means possible... with emotion.

Mastersound amplifiers, except the tubes, comes with a five-year limited warranty covering defects in material and craftsmanship. During the warranty period, repairs are provided free of charge. Transportation costs, to and from, has to be paid by the owner of the unit.

Mastersound is the finest Italian crafted audiophile product on the market. Each order is custom-built and is typically delivered within 4-6 weeks from Italy. Please call for availability and delivery estimates.

Special Notice:
Mastersound stands behind its products and their reputation is known widely to the audiophile world. Once your order is placed, there are no refunds or exchanges allowed.

Italian Handcrafted Perfection


Our new pre-amp section, of the Compact 300 B grew from our careful research. Combined with our unique output transformer and powerful, the 300 B triodes working in Single Ended mode, the amplifier renders a genuinely engaging sound. We use a semiautomatic biasing system, which once regulated, will give optimal life to the final tubes.

Finally, we use 24 karat gold connections on the Compact 300 B circuit board. The high quality capacitors are manufactured for MasterSound. All of which delivers an impressive sonic performance!


Single Ended in class "A"

        2 x 15 Watt

Finals tubes
        2 x 300 B

Pre-drivers tubes
        2 x ECC802

Drivers tube
        2 x 6SN7 GT

Input impedance
        50K OHM

        3 x Line + 1 Direct

Output transformer

Load impedance
        4 – 8 Ohm

Negative feedback
        0 dB

        with remote control

        8 Hz / 40 kHz – 0dB

        54 x 29 x 27 cm. (17.7 x 16.9 x 10.6 in)

        33 Kg. (73 lbs)

        5 years (excluding tubes)


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Download - MasterSound Compact 300B User Manual

Download - MasterSound Compact 300B Spec Sheet

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