The MD300-APS is one of the larger scale products in family of vacuum tube Stereo Pre-amps from Ming Da. Through its unique 300B or 2A3 amplification architecture, the MD 300 APS brings the best that those tubes have to offer to amplifying low level preamplifier signals. It boasts a higher dynamic range than most preamps on the market.
On the functional side, the MD 300 APS has four inputs and two sets of outputs for driving amps and subwoofers. There is a bias switch on the back for choosing 300B or 2A3 amplifying tubes. A remote is included that operates volume and muting. To further quiet tube microphonics, high quality tube ring dampers are included.
The MD300-APS is made up of five high fidelity Vacuum Tubes over three different types, catering for a greater range and depth in sound, and providing an optimally natural sound reproduction. A pair of low noise 6SN7 tubes are the first stage of the amplifying chain that feed either 300B or 2A3 tubes (see “Tube Righteousness” to determine which tube is right for you). An easy bias switch located on the back of
the preamp, allows you to switch between the two handily. The MD 300 APS also has a stunning frequency range between 5Hz to 150KHz and good voltage gain; while the natural quality of sound reproduction in the MD300-APS is helped by negligible distortion and Signal to Noise Ratio.
A wide input voltage range of betwen 100mv to 1000mv, high capacitance and low output impedance makes the MD300-APS high on efficiency while designed to retain as much original sound as possible.