Manley Neo-classic SE/PP 300B

12 900,00 €

Decidedly retro, the 300B harkens to a bygone era that focused on the simplicity of design.

Decidedly retro, the 300B harkens to a bygone era that focused on the simplicity of design. Expect luscious mid range, delicate detail, and seductive emotion. User control of negative feedback and the ability to switch topology ‘on the fly’ from 12 Watts in parallel SINGLE-ENDED mode to 25 Watts in PUSH-PULL mode is totally unique. This is an amplifier that will always delight and entice you as it adapts to a variety of efficient speakers (and ears!).

With its decidedly (and studiedly) 'retro' physical proportions- very deep front-to-back dimensions with a narrow side-to-side width, this layout closely follows concepts of a bygone era, where the well-conceived intention was to keep the power supply as far as possible from the hum and noise susceptible octal input tubes. The output tubes themselves require careful distancing from the mains transformer and, of course, require pure DC on their filaments. Again, reverence to past times begs the use of vacuum tube rectification with its very gentle voltage rise-time. But to bring the performance up to modern demands, we use two rectifiers to enable the use of very substantial filter / reservoir capacitors... over 1300 microfarads in the B+ rail- much improved from the 4 or 8 microfarads utilized in the 1930's.

Expect a juicy center, delicate details and seductive emotions.

We chose to rise to the challenge of designing special circuitry that could be switched "on the fly" From 12 watts in parallel SINGLE-ENDED to 25 watts in PUSH-PULL which, we believe is unique in the industry.

When several other manufacturers started selling single-ended amps with 5 to 9 watts of power, we understood subjectively and objectively the good part of the story: the superb mid range, the delicate detail, the inherent simplicity. The bad news was that there were almost no speakers efficient enough to help form a dynamically viable system. The worst news was that either these single-ended amps cost more than the condo and or they had specs that could only be read as a joke. As the triode fans increased, more efficient speakers became available and several fanatics began to dismiss push-pull as a bad thing to be avoided at all costs. We objected to such blanket generalities and stressed that the push-pull done right with truly phase-balanced transformers, quality parts throughout and well designed circuitry has proven to be a superb technique. We also enjoy single-ended topology but only when it is done right, mostly because we expect flat frequency response and low distortion out of an amplifier. We knew that we could achieve this in a properly conceived single-ended design. We chose to rise to the challenge of designing special circuitry that could be switched "on the fly" From 12 watts in parallel SINGLE-ENDED to 25 watts in PUSH-PULL which, we believe is unique in the industry.

The Output transformer (hand-wound in our own factory) is of complex design employing inordinately high primary inductance to compensate for the mandatory magnetic "gap" required for the uni-direction current and voltage flow of the single-ended output stage. Another factor in the single ended triode saga (currently enjoying a wide spread popularity) is demand for little (or sometimes zero) negative feedback. We at Manley Labs believe in the judicious or sensible amount of feedback to refine and maximize performance. Our Neo-Classic SE/PP300B gives you the choice in precision switched 1 dB steps to go from ZERO dB's to 10 dB's of negative feedback. Even with zero negative feedback, this amp is cleaner and flatter than any single-ended amp we know of. For more information about variable feedback read Notes on Negative Feedback.

SPECIFICATIONS

Output Power

SINGLE-ENDED: 11 Watts @ 3% THD
PUSH-PULL: 24 Watts @ 1.5% THD

Input Impedance

100 kOhm

Maximum Power Consumption

240 W

Weight

18,60 kg

Dimensions

229 x 216 x 584 (H x L x D)

Additional materials

We care for our clients by providing them with the necessary information.

Additional materials

Manual

How to Bias Your Manley Tube Amplifier

Audio Advisor Tutorial – Biasing your Manley Tube Amplifier

Manley’s first commercially available products were upper echelon high-fidelity vacuum tube amplifiers and preamplifiers constructed at the old Vacuum Tube Logic of America factory.
On January 30, 1989, a 20 year old EveAnna on sabbatical from her studies at Columbia University met the crew and was hired on to the production team. She quickly learned to solder and assemble vacuum tube amplifiers, and after training a new team of assemblers, EveAnna worked her way into the Quality Control department.

It was at this time that the first Manley professional products were developed, starting with the original 1u Reference 60dB Microphone Preamplifier and soon followed by the Manley Enhanced Pultec and Mid Frequency Equalizers. These products, along with the Manley Reference Cardioid and Reference Gold microphones, all made their debut at the 1990 Los Angeles AES Show.

In 1993, Manley Laboratories, Inc. became a separate entity apart from VTL.
The new Manley Labs factory at 13880 Magnolia Ave. in beautiful and bovine Chino, California was outfitted to house the Manley Hi-Fi and Pro Studio manufacturing as well as the Langevin production lines, our newly acquired machine shop, and printed circuit board facilities. The following year, the factory’s capabilities were augmented by the addition of a computer-controlled mechanical engraving machine and, very importantly, a transformer winding department.

As the motto of Manley Labs says

TUBES RULE