Whirlwind LD410 Operation Manual

INTRODUCTION
The Whirlwind LD410 Line Driver is the ultimate tool for matching
audio equipment signal levels. The LD410 is both a professional quality,
sonically superior -10 to +4dB to -10dB level converter and a flexible
multichannel distribution amplifier within a single rack space enclosure. Each
of the eight output channels feature gain controls, LED metering and mute
buttons. There are also eight input channels utilizing the highest quality, low
noise preamplifiers with14dB input pads that can be engaged to attenuate high
input signals. The LD410 is factory configured with four channels of 10dB to
+4dB conversion (RCA input jacks to male XLR outputs) and four channels of
+4dB to 10dB level conversion (female XLR inputs to RCA output jacks). An
additional screw terminal block on the rear panel provides balanced signal
connections for those channels with RCA jacks. Assignable signal routing
jumpers inside the LD410 permit the creation of multiple distribution
amplifiers by allowing multiple outputs to receive their signals from a common
input. The LD410 has an internal power supply, which can be set for 115VAC or
230VAC by changing internal jumpers.
UNPACKING
US Audio has made every effort to ensure that your equipment
is received in the same perfect condition it was in when it left the
factory. Please inspect your product for signs of any damage during
shipping and report them to your dealer so that he can present a claim to
the shipper. We recommend that you save your packaging material for
use in the unlikely event that you need to return your equipment for
service.
FEATURES
The LD410 is a one rack space, eight channel, high performance line driver featuring:
Four channels of +4dB to -10dB level conversion, female XLR to RCA phono.
Four channels of -10dB to +4dB level conversion, RCA phono to male XLR.
All eight outputs have -38dB to +38dB variable gain controls.
Multiple outputs can be assigned to a common input.
LED metering for -10dB, +4dB, output and input clip indication.
Mute switches on each output.
Switchable 14dB pads on each input.
Screw terminal block allows balanced signal connections to all channels
LD410
professional interface