Manual

16 DL251 Audio System I/O
MUSIC Group IP Limited
DL251/DL252 Introduction
DL251
DL252
1. Introduction
Welcome!
Thank you for purchasing a DL251/DL252 Audio System I/O.
The DL251 and DL252 Audio System I/Os are 19” rack units
designed for use with Midas digital systems.
Your DL251/DL252 Audio System I/O was conceived by Midas
to offer audio professionals high-performance audio
equipment, designed to provide no-compromise sonic quality
with a feature set that offers all essential facilities and
functions. It represents the very best of British design and
engineering combined with contemporary, efficient
manufacturing methods, and will give you many years of
reliable service.
So, to obtain the best results with a minimum of effort, please
read this operator manual and, finally, enjoy your Midas
DL251/DL252 Audio System I/O!
Key features
The DL251/DL252 Audio System I/Os have the following key
features:
• Mic/line inputs The DL251 has 48 mic/line inputs and the
DL252 has 16 mic/line inputs.
• Line outputs The DL251 has 16 outputs and the DL252
has 48 outputs.
• Operator interface A series of sections on the front panel
have LEDs to convey operating/configuration status to the
operator. Some sections have a configuration button for
setting up the unit’s parameters, such as clock source,
sample rate, etc.
• MIDI Both units have in, out and thru MIDI sockets
supplied as standard. (For use with Midas consoles only.)
• AES50 Three AES50 inputs/outputs provide connection
to the console/snake via EtherCon® XLRs, which are
configured for N+1 cable redundancy.
• Sample rate Switchable between 96kHz and 48kHz
sample rates.
• Ethernet An Ethernet control socket on the rear panel
allows Ethernet control via Cat 5e cable up to 100 m long.
• A/D Analogue to digital conversion is by default 24-bit,
96kHz.
• Gain range From -2.5dB to +45dB in 2.5dB steps.
• Mute A MUTE button on the rear panel will mute all
outputs simultaneously for on-stage patching, if held in for
longer than one second.
• Boot mode A recessed boot mode button on the rear
panel selects between normal operation and a service
personnel-only configuration boot mode.
• Diagnostics A D-type connector on the rear panel allows
diagnostics (by service personnel only) to be carried out on
the unit.
• Power supplies Dual redundant power supplies, each
with dual locking mains connectors.
About this manual
This is the operation manual for the DL251 Audio System I/O
and DL252 Audio System I/O. It is intended to help get your
unit installed and in operation as quickly as possible by giving
you unpacking, installation, connection, setting up and
operating instructions. To help familiarise you with the
DL251/DL252 there is a description of the front and rear
panels, along with easy-to-follow user instructions.
EN