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IMPORTANT:
Go to www.extron.com for the complete 
user guide, installation instructions, and 
specifications before connecting the 
product to the power source.
XPA Ultra Series Audio Power Amplifiers • Setup Guide
(XPA U 358, XPA U 358-70V, XPA U 358-100V, XPA U 358C-70V, XPA U 358C-100V, XPA U 1004, 
XPA U 1004-70V, XPA U 1004-100V, XPA U 1004C-70V, XPA U 1004C-100V, XPA U 1002,  
XPA U 1002-70V, XPA U 1002-100V)
 WARNING:   Installation and service must be performed by experienced, professional installers only.
AVERTISSEMENT :  L’installation et l’entretien doivent être effectués par des installateurs professionnels 
expérimentés.
This guide provides startup instructions for experienced, professional installers to set up and operate the XPA Ultra Series audio 
power ampliers. All references are to the XPA Ultra Series User Guide which can be found on www.extron.com.
Step 1 — Powering Down Equipment
Be sure that power to the amplier is turned off rst.
NOTE:  Adjust the audio level to   (full attenuation) prior to powering the amplier in Step 7 on page3.=
Turn off all other equipment and disconnect the power cables. Verify that the amplier is disconnected from the power source 
before proceeding.
Step 2 — Mounting and Applications
Rack Mounting
The XPA Ultra Series ampliers can be rack mounted using one of the following methods.
NOTE:  See the XPA Ultra Series User Guide for instructions on mounting to a rack shelf.
Rack Ear Mounting (Single Unit)
The XPA Ultra Series ampliers ship with a set of rack ears so the half rack-width ampliers can be installed in a full rack-width 
space.
Mount the amplifier with the rack ears as follows:
1.  If feet were installed on the bottom of the amplier, remove them.
2.  Attach the included rack ears to the sides of the amplier with the four provided #6 machine screws (
1 in the gure below).
3.  Insert the amplier into the rack, align the holes in the rack ears with the holes on the rack.
4.  Secure the amplier to the rack using four provided 10-32 x 3/4” screws (2 in the gure below).
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XPA U 1 004 SER IES
1 2 3 4
OVER
TEMP
LIMITE R/PRO T E C T
S IGNAL
POWER AMPL IFIERS
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