3
Powering up _____
Please read this instruction manual thoroughly before powering up your
Stealth Max
for
the first time. The location of the tubes on the driver board and chassis are shown below.
When installing tubes, locate the key on the central spigot and make sure it matches with
the indent on the tube socket. Push the tube into the socket with a slight rocking motion
to ensure it seats properly. Removal is also easier of the tube is rocked slightly as it is
pulled out. Don’t over-do the rocking as it can cause the spigot to break off. The KT88
output tubes are installed as matched pairs as indicated on the boxes supplied with your
amplifier. Matched quads are not required as individual bias controls are used for each
channel.
With the tubes installed, connect the IEC power cord to the AC input receptacle on the
rear of the chassis. A proper sized fuse (3 A/250 V) has been installed (a spare is
provided). Plug the cord into an ac outlet rated for at least 200 W (110-125 VAC or 230-
240 VAC for the export version, 50-60 Hz). The ac power switch is on the front panel.
The red pilot light indicates the AC power is on. You will see the heaters light up,
particularly in the KT88 tubes. It takes approximately 60 sec for the plate voltage to build
up to the operational level and stabilize. This “soft start” maximizes the lifetime of the
tubes and capacitors in your amplifier.
