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Summary of Contents for Anthony DeMaria Labs Liquid Mu ADL-1700
- Page 1 ADL-1700...
- Page 2 Introduction Congratulations on your purchase of the ADL 1700 Liquid Mu Peak Limiter, often referred to as the little brother of the Fairchild 670. The 1700 employs an all discrete tube design modeled after and a cross between the vintage UA 175-B and 177 limiter except we enhanced some features for added flexibility.
- Page 3 Audio Connections for Transformer Balance Systems If the 1700 must be used in an unbalanced system please follow the three steps below: Connect the ground or shield of your audio cable to pin 2 of the XLR Connect the hot wire to pin 3 of the XLR Repeat step 1 and 2 when using a 1/4”...
- Page 4 ADL assumes no responsibility for possible injury from electric shock while servicing this product or operating it with the top cover off. Turning the unit off while not in use will increase component life. If you have any questions, please contact ADL. To further increase component life, please allow for adequate ventilation at rear of unit.
- Page 5 Controls Input Gain Knob Continuously variable, controls the amount of compression by altering the resistance in the grid circuits of V-1 (6BC8). Gain reduction is easily visible on the VU with the master select switch set to GR (Gain Reduction). As per the original design, jumpers are located on the main circuit board near the input transformer, clearly marked GAIN SELECT.
- Page 6 Bypass The bypass switch allows for immediate A/B comparison between the 1700 and the raw signal connected to the input XLR. The switch is clearly marked and also has a red LED tip to indicate when you are bypassing the 1700. 90Hz High Pass Filter Used to keep frequencies below 90hz from affecting the action of the compressor, resulting in a more dynamic low frequency spectrum when the compressor is in use.
- Page 7 Release Switch This is a five position Grayhill switch. This switch is set according to taste and music type. The slow setting is generally used for vocals and narration, while the faster setting is best suited for program material with more extreme dynamic range. Attack Switch This switch is a six position Grayhill switch.
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Page 8: Specifications
The left most trim is used to balance the cathode voltage Start by first adjusting the plate balance, then the cathode balance trim for minimum meter deflection. Output gain fully clockwise (zero attenuation) Repeat step 8. Note meter indication. Adjust the plate balance trim slightly clockwise until a change in meter indication is observed. -
Page 9: Warranty
WARRANTY Anthony DeMaria Labs, Inc. 845-255-4695 anthonyadl@aol.com This manual was created 10-28-13. The content, wording, diagrams, photos, etc. of this manual are the sole property of ADL and may not in any way be reproduced, copied, transmitted, or transcribed in any language without written authorization from ADL.
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