The TUBE-TECH MP 1A is a combined dual Microphone Preamplifier and Direct Instrument amplifier for microphones or instruments. The microphone inputs and outputs are balanced as well as fully floating. The inputs provide a switchable +48 V phantom power as well as a switchable -20 dB pad. Gain is adjustable in 5 dB increments from +20 dB to +70 dB.

The Direct Instrument Inputs are unbalanced with a gain ranging from + 10 dB to + 60 dB. The amplifiers are all tube based and the heaters are on a strict diet of DC-voltage only to avoid hum. All transformers, with the exception of the mains transformer, are enclosed in MU-metal cans. Input and output transformers come with a static screen between the primary and secondary wirings.

• Tube based push-pull output amplifier
• Gain from +20 dB to +70 dB in 5 dB increments
• Pad in front of input transformer (-20 dB)
• Built-in +48 V phantom power
• Microphone input impedance = 1,2 kohm
• CMRR >60 dB @ 10kHz
• Direct Instrument Jack-socket input for various instruments
• DI input impedance > 1 Mohm
• Frequency Response @ -3 dB: 15 Hz to 60 kHz
• Typical noise figure: 5 dB @ 200 ohm