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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.
A ducking 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
125 volts 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 rac k space sizes. In-
stallation is simple and does not require removal of the
equipment from your rack. See your Ashly dealer for
details.