FEATURES
Your MATCHLESS is a straight forward amplifier devoid of bells and whistles. It is
an all tube design including the power supply rectifier. Cathode bias operation is utilized for
the output stage. The top-boost channel uses two 12AX7’s tubes in the first preamplifier,
while the 6 position vari-tone channel uses an EF/86-6267 pentode tube. This configuration
offers a unique tonal difference between the two channels.
All C-30 amplifiers incorporate a MASTER volume control feature and a HI-LO
power setting switch enabling the artist to take full advantage of the harmonic rich nature of
an all vacuum tube design. MATCHLESS amplifiers are available in a variety of
configurations. An effects loop is available as an option for most amplifiers. MATCHLESS
amplifiers may be ordered as single, dual or quad combos as well as separate head and
cabinet configurations.
Speaker cabinets are available for use with rack mount amplifiers or as auxiliary
cabinets for all combo amplifiers and amplifier heads. Cabinets can also be ordered with
custom impedance ratings; this is especially useful when multiple speaker systems are used.
OPERATION: GENERAL
Your MATCHLESS is an all tube design. If your experience is limited with regard
to vacuum tube instruments amplifiers, you should become familiar with the characteristics
that differentiate vacuum tube designs from their solid-state counterparts… Aside from the
tone or sonic performance.
1. Vacuum tube amplifiers require a “warm up” period of up to one minute before
they become operational, and they usually sound better as they “cook”. This is due to the
fact that electrons only flow when the cathode of a tube if fully heated. This is also the reason
vacuum tube amplifiers run so much hotter than solid-state design.
2. Many vacuum tube amplifiers incorporate a STAND-BY switch, which aside from
muting the amplifier, performs a more valuable function of removing current from the circuit
while allowing the heaters to remain energized. The STAND-BY mode is used during short
breaks and is usually preferred to turning the amplifier off. This allows the amplifier to cool
and greatly enhances the useful life of the output tubes.
NOTE: MATCHLESS amplifiers are biased hot and should not be allowed to idle with no
input signal or long periods of time.
3. Tube type amplifiers are inherently sensitive to speaker impedance matching.
This is due to the relationship of the internal resistance’s of the output transformer, the
output tubes, and the load they are required to drive. A load imbalance can cause loss of
power, self-oscillation, or excessive current to flow in the output stage. In severe cases this
condition can cause the output transformer to run hot and may damage and destroy the
output tubes. This kind of damage is not covered by the warranty. The impedance switch,
located at the rear of the chassis, is used to match the amplifier to the speaker load. This
rotary switch has three positions and can match the amplifier to four, eight, or sixteen ohm
loads. This switch should be set before the amplifier is turned on. MATCHLESS single and
four-ten cabinets are normally eight ohms. Dual speaker models are normally four ohms.
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