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BHK Signature 300 Mono Amplifiers

The gold standard of power amplification

Built in Boulder

The audio performance and build quality of the Signature 300 series has been refined, honed, and polished over the past half century of design work by industry legend, Bascom H. King. If there is a better performing power amplifier anywhere in the world, we are unaware of it. The BHK Signature 300 Monoblock designs are built upon two proven topologies: a zero-loss vacuum tube input stage coupled to a high bias differentially balanced MOSFET output. If you are uncomfortable with compromise and seek the finest performance, reliability, and build quality, the BHK Signature 300 series is a perfect fit.

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BHK Mono 300 Power Amplifier

Product Description

Only a rare handful of power amplifiers withstand the test of time. The BHK Signature 300 is one such amplifier. Hand built, uncompromising.

The BHK Signature 300 Mono power amplifier culminates one man’s lifelong quest for perfection in power amplification. Bascom H. King’s magnum opus combines a pair of vacuum tubes on its input with a double set of parallel MOSFET outputs capable of 300 watts in 8Ω, 600 into 4Ω and more than 1,000 watts into 2Ω.  The BHK Signature 300 amplifier can drive any loudspeaker to musical perfection and is the most important element in your music reproduction chain.

rsz_1deliveryThis product qualifies for our risk-free in-home trial and free White Glove Delivery in the continental United States if purchased directly.

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  • Zero-loss parallel vacuum tube input stage
  • Fully paralleled inside (not like a traditional bridged approach)
  • Differentially coupled, paralleled, balanced MOSFET output stage
  • All through hole construction (no surface mount parts)
  • RCA Single ended input
  • XLR balanced input
  • 300 watts 8Ω
  • 600 watts 4Ω
  • 1000 watts 2Ω
  • Less than 0.1% thd 20Hz to 20kHz at rated power
  • Damping factor 100 for excellent loudspeaker control
  • Front panel standby button for vacuum tube input
  • -3dB greater than 200kHz
  • Dual, custom, solid copper, gold plated output binding posts
  • Fully balanced from input to output
  • 83 pounds
  • Input 12 volt trigger
  • Easy access for tubes

The Absolute Sound

Anthony Cordesman

They have truly exceptional imaging, depth, and natural soundstage width, and they really can get the best out of the naturally miked and produced recordings that have a real-world soundstage. The 300s’ dynamics are extraordinary, particularly in the lower octaves that seem to be in even more demand for audio reproduction today than the upper octaves.

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Stereophile Magazine

Michael Fremer

The fact is, the BHK Signature 300 is a powerful, nimble-sounding amplifier that immediately drew me in with fast, punchy, tight bass; rich, liquid mids; and delicate, transparent highs—all effectively well integrated into a coherent whole.

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Soundstage!

Erich Wetzel

PS Audio’s BHK Signature 300 Mono amplifiers produced wonderfully clear sound in my room, yet with a tangible, 3D quality that gave the music emerging from my speakers a bit more body -- which I really enjoyed. Their soundstaging was exceptional, and they proved unflappable throughout the listening period, despite being challenged with complex music and punishing volume levels. Their treble response was clean without sounding edgy, allowing me to enjoy longer listening sessions than I have with any other amp. I also appreciated the BHK Signatures’ tight-fisted bass reproduction, which delivered plenty of slam when the music called for it. While their looks may be bland, their build quality and tolerances of fit and finish were superb. The BHK Signature 300 Monos are expensive, but nothing in their build quality or sound makes me doubt that they’re worth every penny PS Audio asks for them -- or that they’re great amps.

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Hi Fi Statement

Dirk Somer

The BHK Signature 300 Amplifier are nothing less than world-class amplifiers: Sonically they leave nothing to be desired, as they combine in perfect style power and control with softness and emotion. And PS Audio circuit Bascom H. Kings packed in simple and well designed housing instead of aluminum sculptures, the Monos can decorate with an unprecedented low price / sound ratio: downright reasonable dream amplifiers!

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Suono

Giulio Salvioni

The PS Audio BHK Signature 250 has everything that one would expect from a power amplifier of this category: it’s powerful, fast, accurate, gentle regarding its ability to convey the harmonic complexity of even the most difficult audio tracks and has a great dynamic reserve. Its ability to recreate a coherent and well focused soundstage puts this product among the best power amplifiers regarding this parameter. I could go on for a while extrapolating specific parameters and writing about how well the BHK behaved respect to them, but it would be useless. In my opinion the ultimate reason of the beauty of this poweramp is the ability to translate all these individual elements into a performance that is, at the same time, musically coherent and effective. All this at a cost that must be considered extraordinarily competitive.

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Audio Video Magazine

Deon Schoeman

Yes, it's all things you'd expect from a top flight amplifier: powerful and precise, fast and dynamic, generous in its staging, and close in its focus. But its ability to translate those elements into a musically coherent and consistently compelling performance is what sets the BHK Signature apart from any other power amplifier I've listened to. I sense a classic in the making.

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