Anthem AVM 20 Software Update Procedure

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8. SOFTWARE UPDATING
The operational characteristics of the AVM 20 are controlled by a Software program that resides in Flash
Memory. The Software can be easily upgraded via the RS-232 port on the Rear Panel. New Software can be
downloaded from our web site, and then transferred by connecting the AVM 20 to your computer’s serial port
and running the AVM 20 Software Installer.
Note: All saved USER and INSTALLER Settings, and Passwords are retained and not overwritten by the
Software updates!
8.1 SOFTWARE VERSION IDENTIFICATION
If you want to know the Software Version you have in your AVM 20, press STATUS. The Front Panel display
will look something like this:
Please contact your dealer or visit the AVM 20 page on our web site at www.anthemAV.com to find the latest
Software, and any owners manual updates that go along with new versions.
8.2 SOFTWARE UPDATING VIA YOUR DEALER
To do this, you will have to take your AVM 20 to your Authorized Anthem Dealer. To save yourself time and
trouble, please remember to call your dealer first to find out if you should get the latest Software version, and
then arrange a time to install the update. Note: Your dealer may charge for this service.
8.3 SOFTWARE UPDATING VIA YOUR COMPUTER AND THE INTERNET
To update the Software through your computer, you will need the following:
• Access to the Internet.
• Serial cable – straight wired, with one end DB9 male for the AVM 20, and the other, DB9 female or
DB25 female for your computer.
Note: Typically, a cable length of up to 100 feet (33 meters) will work for a long distance connection
to your computer. You may also install this cable permanently to the AVM 20, enabling easy future
updates, without the need to disconnect the AVM 20 from your system.
Computer System Requirements:
PC: • Win9x or Win2000.
• 1 Meg free space on the hard drive.
• Serial Com port (COM1 to COM4). The software will automatically detect the COM port being used.
MAC: • MacOS 7.6.1 or higher with 32 Meg of RAM.
• 3 Meg free space on the hard drive.
• Adapters for serial cable – please see information included with the Software update.

Anthem AVM 20 Specifications

Preamplifier Section

input impedance	20 kΩ
output impedance (Main-RCA)	300 Ω
output impedance (Other-RCA)	51 Ω
output impedance (XLR)	600 Ω
rated input	2.0 Vrms
maximum input (6-Channel S/E)	3.0 Vrms
maximum input (All Others)	5.3 Vrms
rated output (100 kΩ load)	2.0 Vrms
minimum load	5 kΩ
maximum output (RCA)	6.3 Vrms
maximum output (XLR)	12.6 Vrms
headphone output	100 mW into 32 Ω
volume range (Main)	-95.5 dB to +31.5 dB (0.5 dB resolution)
volume range (Zone 2/3 & Headphone)	-70 dB to +10.0 dB (1.25 dB resolution)

Bass Management

high-pass slope	12 dB/octave (2nd order)
low-pass slope	24 dB/octave (4th order)
crossover frequency	25-160 Hz

Power

supply voltage	105-130 V, 60 Hz only
power consumption	Maximum 120 VA
fuse rating (Main Power Supply)	1.0 A slow-blow 5x20 mm
fuse rating (Standby Power Supply)	315 mA slow-blow 5x20 mm

Weight and Dimensions

width	17-1/4 inches (43.8 cm)
height	5-7/8 inches (14.9 cm)
depth	14-1/4 inches (36.2 cm)
weight	27 lb (12.2 kg)