Congratulations and thank you for your purchase of the Audio Note™ Kassai
mono power amplifiers. The Kassai is a Pure Class A Parallel Singled Ended valve
amplifier that uses the highly regarded 300B directly heated triode valve. The
Kassai produces a level of performance that is radically superior to current
designs and was specifically designed for sonic performance rather than technical
specifications. It also fulfills all Level 4 criteria.
- Pure Class A operation
- Zero negative feedback
- Single ended output stage
- Valve rectification
- Directly heated Triode
- Materials and component quality
This Level 4 amplifier has the following features: Audio Note™ silver wiring,
Audio Note™ copper foil signal capacitors, silver wound secondary on the output
transformer and 1 W Tantalum resistors.
UNPACKING AND INSTALLATION
These amplifiers are shipped without the valves installed. It is
necessary to install the valves first. It is
installed correctly or
warranty will result
serious damage that is not covered by the
. We recommend that your dealer does this for you.
essential
that the valves are
Installing the valves
Please take care when unpacking the amplifiers as they are fairly heavy and
place on a suitable clean space (table or floor) it is recommend that you store
the packaging materials in case the unit requires shipping at a later date.
Carefully unwrap all the valves. You will find 1x 6SN7WGTA, 2 x 300B and 1x
5U4G valves for each amplifier.
Looking from the front of the amplifier, the first valve to insert is the 6SN7WGTA
valve which goes into the first valve base at the front of the amplifier.
Inspect the locating pin on the bottom center of the valve and align with the
valve base (the locating pin can only go in one way round due to a locating
spigot) and with gentle but firm pressure insert the valve. Please see diagram 1.
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6SN7
300B 5U4G
Diagram 1: Kassai Tube Locations
Looking from the front of the amplifier, the next valve to plug in is the 5U4G
valve which goes into the last valve base at the back of the amplifier.
Inspect the locating pin on the bottom center of the valve and align with the
valve base (the locating pin can only go in one way round due to a locating
spigot) and with gentle but firm pressure insert the valve.
Looking from the front of the amplifier, the next valves to install are the 300B
valves which are inserted into the two 4 pin valve bases in the middle of the
amplifier.
It is absolutely vital that these valves are fitted correctly
(1) The larger pins must face the front of the amplifier when fitted to their valve
bases.
(2) The sticker on the valves base must also line up with the sticker on the
copper top plate, that is, A to A, B to B etc., or 1 to 1, 2 to 2 and so on.
Please make sure that both (1) and (2) are correct and with gentle but firm
pressure insert the valves into their sockets. Check again that all valves are fully
inserted in the correct way in their respective valve sockets. Follow the above
installation for both amplifiers.
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Installation
Select a suitable location for the units ensuring that adequate ventilation
clearance is provided allowing at least 30cm. of space above the units. This is an
important consideration as the amplifier generates substantial heat during
normal operation. Be sure not to install the amplifier into a cabinet with
restricted air flow or onto a thick pile carpet.
In the interest of safe, reliable operation situate the amplifier away from
dampness or direct sunlight. Site the unit on a flat and firm surface capable of
sustaining the amplifier’s weight. Worthwhile sonic improvements may be
obtained by locating the amplifiers on a purposely designed audio support
system.
CONNECTION – Inputs
Each amplifier has a single RCA socket on the back panel for connection to your
preamplifier marked as Input. The sockets are colour coded Black for Left
channel and Red for Right channel.
CONNECTION – Speakers
Each amplifier is equipped with three colour coded standard binding posts for
connection to your speakers.
Connect the amplifiers black speaker output binding post marked as “ 0 ” to the
black terminal (also marked “ – “) on the speaker.
Connect the amplifiers red speaker output binding post marked “8 Ohm” to the
red terminal (also marked “ + “) on the speaker.
The other red speaker output binding post is marked “4 Ohm” and may be used
with 4 Ohm speakers. If you are uncertain whether your speaker system is of 4
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