T O R I I J R O W N E R S M A N U A L
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HEAT
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The TORII JR. has been designed like many Decware amplifiers with a non-ventilated
chassis and a black steel plate to hold and distribute heat evenly throughout the
amplifier. There are two advantages to this technique, 1) Better Sound and 2) The
insides of the amp remain clean and factory new even after 30 years of operation.
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The temperature of a TORII JR ramps from room temperature (
76 degrees F
) to max of
around 135 degrees F at a very slow and linear rate. Peak fidelity is reached early at
temperatures as low as
108 degrees.
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Should the amp be enclosed in a cabinet with no ventilation in a high ambient room
temperature, it is possible for the amplifier transformer temperature to reach 140
degrees F., at which point the sound quality of the amplifier will begin to regress but
otherwise pose no harm to the amplifier.
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It may be of interest to know that the reason this amplifier’s heat ramp is linear and
gradual over many hours is because the heat is not coming from current draw on the
power supply, but rather from the infra-red radiation of the tubes themselves. This
radiation is absorbed by the black steel chassis and stored as heat.
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This amplifier runs slightly warmer than the larger TORII MK4 because it has almost the
same amount of tubes oriented into a much smaller area.
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All this talk about temperature is to let you know the amp is designed to run warm to
optimize the sound.
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INPUT SENSITIVITY
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The TORII JR uses the same circuit as the all previous TORII amplifiers so it has a
similar input sensitivity of 1.9 Volts. That means on typical CD’s in a typical CD player
you can turn a TORII JR up between 75% & 90% before distortion is heard. If you use
a preamp, then the point at which the volume controls on the TORII JR distort will be
relative to how loud you have the preamp turned up. You can actually use this to your
advantage by turning the volume on the TORII JR down to around 1/2 and then run the
volume on the preamp higher to compensate. The result is often better sound.
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Decware High Fidelity Engineering Co., East Peoria IL, USA www.decware.com
