Manley Labs Neo-Classic 300B Preamplifier RC Silver

While Manley’s historical use of the 300B tube has been most prominent in small power amp models, their specific voltage swing and power level makes them a terrific match for headphone amplification purposes. This, combined with their smooth and natural sound made them Manley’s obvious choice for a next generation line-driving preamp.

Running in tandem with the two output tubes are large octal 6SL7GT triode tubes, all operating in pure Class-A mode. The implementation of tube rectification and regulation for the Neo-Classic 300B’s high-headroom power supply perfectly complements the retro feel of its circuit siblings.

Intelligent Ripple Rejection

Developed from scratch by Manley Magnetics, Neo-Classic 300B’s ripple rejection circuit is a new component designed to intelligently filter out power supply noise. The result during operation is a stunningly clean preamplifier performance which gels particularly well with the requirements of discerning headphone listeners.

Volume can be adjusted with a true audiophile ALPS potentiometer which perfectly matches the rich quality of the Neo-Classic 300B’s line driver, while under the hood high purity silver wire, extra thick copper and plated PCBs, custom Manley Magnetics designed output transformer modules and gold-plated RCA connectors all combine to deliver the cleanest audio path possible.

Specifications

• Gain: Factory set at 12 dB at max Volume
• Noise Floor: -70 dB (1 Hz - 100 KHz)
• S/N Ratio: 105 dB (A weighted, 20 Hz - 20 KHz)
• Frequency Response: 5 Hz to 50 KHz @ 1dB
• THD: 0.08 % @ 1KHz at 1V RMS out
• THD+N: -80 dB (0.01%)
• Input Sensitivity: 250mV (-9.8dBu) yields 1V out
• Input Impedance: 100 kOhm Noble volume control
• Max Input: 5.5dBu or 1.459 Vrms @ 1KHz
• Output Impedance: 100 Ohms (Line)
• Max Output: 17.2dBu or 5.636 Vrms @ 1KHz
• Dimensions: 483 x 330mm (WxL), 12.7kg