XTA ULTRAFIDE U500DC Quick Start Manual

PLEASE NOTE:
This quick start guide is an overview to get you up and running quickly and easily. It contains basic information required to
!
operate the U500DC.
It is not a substitute for reading the manual, that contains lots of important information with regards to safety and setup
requirements. Please take time to read the complete manual and familiarise yourself with its content. For any questions
please contact us, we would love to hear from you.
The U500DC has 5 different connection types on the rear panel:
A
A
C13 IEC AC Mains connection (x1)
D Binding post loudspeaker outputs (x4 pairs - 2 per channel for bi-wiring)
Positioning
Please ensure there is sufficient ventilation around the U500DC at all
times.
DO NOT PLACE THE UNIT IN ENCLOSED SPACES OR COVER ITS
VENTILATION HOLES AT ANY TIME.
Power
An appropriate C13 IEC mains connector must be fitted to the unit to suit
the available mains supply voltage and according to the requirements as
stipulated on the chassis rear voltage label. The correct IEC is supplied in
the box with the unit. This unit must be earthed.
Use the mains rocker switch, on the rear of the unit, to turn the unit on/
off. Use the front standby switch to put the unit out of, or into standby
mode. Please note: There is a short delay upon using the standby switch.
The U500DC can also be put in and out of standby with DC signals on the
remote trigger connectors. The amplifier will accept voltages from 5-12v.
Looping this connection out to other U500DC's is also possible for power
sequencing of other units in the system.
Timbre
For those wanting a more vintage type of sound delivery a "TIMBRE"
switch on the rear changes the input circuits from "PURE" to "VINTAGE" to
operate more like traditional class AB amplifiers.
www.ultrafideaudio.co.uk
Quick Start Guide
D
B
XLR balanced signal inputs (Female x2)
B C
C
RCA unbalanced signal Inputs (Female x2)
E Remote Trigger (x2 3.5mm Jack plugs wired in parallel)
Connections
The U500DC is equipped with binding posts that can accept bare wires,
banana plugs, or spade connections. There are 2 pairs of connectors
for each output channel to allow bi-wiring (separate tweeter/woofer
connections if desired). The Red binding posts are positive (+) voltage,
and the Black binding posts are negative (-) voltage; they should be
connected to the red and black or + and - connectors on the loudspeaker.
PLEASE NOTE: The minimum nominal impedance of loudspeakers
that can be connected to the U500DC is 4 ohms. Driving loads with a
nominal impedance below 4 ohms is not recommended as it may cause
overheating but driving speakers with 2 ohm impedance dips that only
occur at specific frequencies will not cause any problems. The U500DC
remains stable into any load including a dead short, however, shutdown
protection will occur if the output current exceeds 35A, which is highly
likely at impedances below 2 ohms.
The U500DC can accept balanced XLR (recommended) or unbalanced
RCA input signals. For reference when using balanced XLR signal cables
the pin configuration is as follows: Pin 1: Ground | Pin 2: Signal Positive
+ | Pin 3: Signal Negative -
Always make sure that the U500DC is powered off from the AC mains
supply when connecting/disconnecting any loudspeaker or signal cables.
Always make sure that partnering equipment (preamplifier/DAC etc)
are also set to minimum volume before any powering up or down. The
U500DC does have protection for any startup noises, but it's always good
practice to set the volume to minimum on partnering equipment upon
power sequencing.
C B
E