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Park Amplifiers Head 75 Small Box Bass Circuit 1969 Tube Amp Rare Vintage
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Park Head 75 Small Box Bass 1969

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Pendulum Audio MDP-1
Mint condition, fully functional. Beautiful Class-A tube mic pre/DI that's no longer available new. Hand selected tubes, sounds excellent.

The MDP-1 is a modern two channel vacuum tube Mic/DI preamp designed to be the ultimate way to get your mic or source directly to tape or hard disk. Unlike vintage or hybrid designs, the MDP-1 uses a pure tube, class A high voltage circuit topology with a transformerless output stage to deliver an open, intimate sound with a level of detail that meets the requirements of the most demanding recording applications. Our short signal path design excels in audio performance, delivering extremely wide bandwidth, low noise, and high headroom.

A key component of the sound of a tube mic preamp is the input transformer. It's here that we let your select how you would like the preamp to sound. The MDP-1 can be ordered with your choice of two low turns-ratio transformers depending on your requirements: a Jensen 13K7A for a full, open sound with plenty of sparkle in the high end and a deep low end - perfect for recording all sources, especially instrumental music; or a custom-wound transformer for a more 'focused' sound, with extra presence and clarity in the midrange - ideal for a vocal sound that easily distinguishes itself in a mix.

The MDP-1 also has all the things you'd expect in a full-featured mic preamp; phantom power, phase reverse, -20dB input pad, a lo cut filter with 10 frequencies and large, illuminated VU meters.

The DI signal path is completely transformerless, with a selection of three input load impedances: 10M for piezoelectric acoustic instrument pickups, 1M for magnetic pickups, and 100k with a 20dB pad for line level sources such as keyboards or other -10dBV equipment.

All tube, short signal path design
Pure class A, high voltage circuitry
Transformerless tube output stage capable of delivering +35dBu
Low noise, wide bandwidth and superior transient response
Choice of mic input transformer for 'full' or 'focused' sound
30dB gain range in 3dB steps
Fully transformerless DI with 100k, 1M and 10M input impedances
Ten position mic lo-cut filter (20-180Hz)
Gold-plated switch contacts, I/O connectors and tube sockets
Polypropylene caps and metal film resistors (pairs matched to 0.1%)
Fully regulated high voltage (300V) and filament power supplies with soft-start warm-up and muting
Custom toroidal power transformer with shield for minimum hum
Park Amplifiers Head 75 Small Box Bass Circuit 1969 Rear
Park Amplifiers Head 75 Small Box Bass Circuit 1969 Top
Park Amplifiers Head 75 Small Box Bass Circuit 1969 Bottom
Park Amplifiers Head 75 Small Box Bass Circuit 1969 Left
Park Amplifiers Head 75 Small Box Bass Circuit 1969 Right
Park Amplifiers Head 75 Small Box Bass Circuit 1969 Internals Top
Park Amplifiers Head 75 Small Box Bass Circuit 1969 Internals Bottom
Park Amplifiers Head 75 Small Box Bass Circuit 1969 Internals Tubes Transformers
Park Amplifiers Head 75 Small Box Bass Circuit 1969 Transformer Serial