Operating Manual

Fredenstein HD Reference Preamplifier
Installation:
Electrical Safety Warnings:
Do not open the enclosure, hazardous voltages are present inside!
There are no user serviceable parts inside.
Refer servicing to qualified personnel.
Do not expose this appliance to rain and moisture.
Do not block any ventilation openings. Do not install near heat sources.
Protect the power cord from being walked on or pinched. Do not defeat the
safety purpose of the polarized or grounding plug and connect to a properly
grounded mains socket.
According to WEEE Directive (2012/19/EU) this product must not be disposed
with household waste. This product should be taken to a licensed EEE collection
center for recycling.
If you need to replace the mains fuse, make sure the replacement has the same
rating , 2AT 250V, slow blow (2 Amp) in the IEC socket on the HD Reference.
If you need to replace the mains fuse, make sure the replacement has the same
rating , 1AT 250V, slow blow (1 Amp) in the IEC socket on the Commander.
The HD Reference does get hot. This is a result of it using 4 Class A amplifiers
on 48 Volt rails, which, in terms of heat generated, is like having a 15 watt light
bulb in a 1U box.
Please provide for some space directly above and below for ventilation.
Fredenstein HD Reference Manual V1.0 Feb 5, 2016 Page 2