SPECIFICAITONS Power Requirements - 9 Volt. Power Supply RequiredH x W x D (mm) - 183 x 116.20 x 65Weight (kg) - 1.46 The on-board valve-emulated overdrive features a drive mix and level control to ensure you don't lose any volume or gain when engaging the drive.Used in conjunction with the input and output controls and the provided Ashdown VU Meter, you can balance your levels to ensure unity with the output. There is also a passive and active input sensitivity pad provided, with a -3dB cut for use with active instruments. The Ashdown PRO DI features everything you might expect from a touring bass pre-amp pedal, including its own transformer-isolated DI output, providing perfect balanced output for front of house or a monitor feed, with an optional ground lift for use when required. There is also a link out for connection to another monitor feed or alternative output for front of house. Both the DI and link outputs are post-EQ and are set at a nominal output of 0dB. There is a line input with its own dedicated line mix level control on the top of the pedal, allowing you to plug in an audio device to play along with when you need to learn a part, or to receive a feed from a monitor mix and blend the amount you want to hear in your own headphone mix via the dedicated headphone output on the rear of the pedal. This way, you get the sound you know and love directly to your ears.The pedal requires a minimum of 9V with a 45mA draw, center pin negative (power supply not included). Pro-Di PedalUser Manual DOWNLOAD