A and T Labs
K6 Audio Power Amplifier Assembly Manual
2001 A and T Labs Inc.
AMK6a
5
Option
Choices
Description/comments
Power supply input voltage
110v or 240v
(section 4.1)
For operation in different
countries
Bridging
Equipped or unequipped
(section 3.1)
This option allows the two
channels to be operated as
one amplifier, producing at
least twice the power of a
single channel. The option
is enabled by populating
the additional components
on the boards. It may then
be switched on or off.
Differential input
Equipped or unequipped
(section 3.1)
Provides balanced
differential input capability
Amplifier operating voltage
+/- 41v, +/- 58v, +/-82v
(section 6)
+/- 41v is intended for use
with very low impedance
speakers to limit amplifier
power dissipation.
+/- 58v may be set to limit 8
ohm power output to about
130W/channel, or for
typical operation with 4
ohm speakers.
+/- 82v provides the
maximum output power,
350W/channel into 8 ohms
Number of output
transistors
Nominally 8 per channel.
Optionally may be
equipped with 10 per
channel
(section 4.3)
Most applications operate
with plenty of margin with 8
output transistors. For the
most demanding and
severe environments, an
additional two can be
installed
Mechanical Assembly
5 ¼” high natural
convection case,
3 ½” x 19” forced convection
case
(section 5)
The natural convection
configuration may be
desirable for home
applications where the
noise of a fan is
unacceptable.
The 3 ½” unit with fans may
be best suited for sound re-
enforcement or home
theatre applications.
