Introduction, AC Power Requirements

Operating Manual - DLM-821 Stereo Ducking Line/Microphone Mixer

1. INTRODUCTION

Congratulations on your purchase of an Ashly DLM-821 stereo ducking line level mixer. Features include eight balanced stereo inputs for line level sources, the first four inputs with switchable 30dB gain for low impedance microphones. +18V phantom power and stereo/mono switch- ing is provided for inputs 1 through 4. A concentric level and pan control for each input adjusts channel volume and stereo position.

Aducking circuit allows a signal on either channel 1 or 2 to duck (attenuate) the signal on channels 3 through

8.Internally the DLM-821 can be configured for ch.1 pri- ority whereby a signal on ch. 1 has priority over the signal on ch. 2 and fully attenuates channels 2 through 8. Further- more, the ducking level can be configured for -20dB or -90dB, ch. 2 ducking may be disabled, and the left and right signal ducking may be disabled independently. Ultra low noise summing amplifiers combine the channel signals for the main outputs. A pair of 6-segment LED meter arrays monitor the main output levels. Separate level controls are provided for stereo, mono, and headphone outputs.

2. UNPACKING

As a part of our system of quality control, every Ashly product is carefully inspected before leaving the factory to ensure flawless appearance. After unpacking, please inspect for any physical damage. Save the ship- ping carton and all packing materials , as they were care- fully designed to reduce to minimum the possibility of transportation damage should the unit again require pack- ing and shipping. In the event that damage has occurred, immediately notify your dealer so that a written claim to cover the damages can be initiated.

The right to any claim against a public carrier can be forfeited if the carrier is not notified promptly and if the shipping carton and packing materials are not avail- able for inspection by the carrier. Save all packing mate- rials until the claim has been settled.

3. AC POWER REQUIREMENTS

The DLM-821 will perform normally from 98 to

125volts AC. Use only properly grounded AC recep- tacles. To reduce the risk of ground loop hum, use a cen- tral point for system AC power distribution. The AC line fuse is internal, and should only be changed by a quali- fied service technician.

4. SECURITY COVERS

For installations where it is desirable to protect the front panel controls from tampering or accidental misadjustment, use the Ashly security cover, which is available in both single and double rack space sizes. In- stallation is simple and does not require removal of the equipment from your rack. See your Ashly dealer for details.