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Manley Laboratories Neo Classic 300B preamp RC Pre Amplifier Up for sale a rare and beautiful Manley Neo Classic 300B preamp in perfect condition. Those 2 Rectifier tubes has upgraded to Phiilips 5R4GYS. Comes with double box, remote control and all the accessories are included. Shipping is not a problem. More Product Infor: Manley's most esoteric product is the 300B Preamplifier. This is the first and only preamp to feature these classic tubes. Manley has been designing the 300B into small power amps for many years and have always had great respect for the smooth natural sound of this tube. H
Manley’s 300B gear has a strong reputation for big tone, fine texture, and that easy, dimensional presentation tube fans chase. At A$6,900, this sits a touch under the A$7,343 median and just below the A$6,848–A$10,198 comparable spread, so it reads as fair value with a slight buyer’s edge rather than a bargain-basement steal.
That makes it a sensible buy if the unit is healthy, because 300B Manleys tend to be sought after for their musicality and long-term appeal in serious systems. The upside is strongest if it’s well cared for, complete, and ideally comes with recent service or known tube life; with condition still unknown, I’d simply verify biasing, noise, transformer hum, and service history before jumping.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Manley Laboratories emerged in the late 1980s in Chino, California, as a collaboration between EveAnna Manley and her then-husband, David Manley, founder of Vacuum Tube Logic (VTL). Their initial offerings were high-fidelity vacuum tube amplifiers and preamplifiers, hand-built at VTL's facility. By 1989, the brand expanded into professional audio with the Reference 60dB Microphone Preamplifier, followed by iconic equalizers and microphones debuted at the 1990 AES Show. In 1993, Manley became an independent entity, operating from its Chino factory until 2025, where custom transformers became a signature of its warm, detailed sound.
The company specializes in premium tube-based audio gear, spanning professional studio tools like the VOXBOX channel strip, Massive Passive EQ, Variable Mu compressor, and Reference microphones, alongside hi-fi amplifiers, preamplifiers, and equalizers. All products feature in-house design, assembly, and quality control, emphasizing analog purity over digital conveniences such as speakers, turntables, DACs, headphones, or cables.
Manley holds a commanding position in the high-end boutique market, revered by recording engineers and audiophiles for its rich tonal character, uncompromising build quality, and iconic styling. Trusted in top studios worldwide, its gear commands premium prices and a devoted following, recently transitioning under new ownership by audio veteran Dirk Ulrich in 2025 while upholding its American-made legacy.
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