Duncan Convertible 2000 Руководство пользователя - Страница 14
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Печатать страницу6. Reverb: This is where your reverb connects. The return jack accepts the reverb cable with a
red dot on the plug.
Convertible 2000's are designed with Accutronics 2spring reverbs. These are the most natural
sounding reverb units available and they provide a wide range of reverb for your playing styles.
7. Pentode/Triode Switch: This switch changes the operation of the EL-34 output tubes, which
use five components inside each tube. With this switch in the -Up" position, the tubes run in the
Pentode made and all five components operate for full 100-watt power. The sound is brighter and
crisper.
With the switch in the "Down" position, the tubes run in the Triode mode and three components
operate for 60 watt maximum power. The sound is smoother with a little less edge. Experiment
with this switch to find where you like it for your musical style.
Some amps have 50/100-watt switches. What they do is turn off the plate voltage to two of the
four output tubes. This is audible as a slight decrease (-3dB) in loudness. Triode mode actually
changes the harmonic distortion characteristics of the tube, producing lower order distortion.
8. Variable Damping: This circuit is included with the Convertible 2000 to give you more control
over your sound. Damping is the amount of control the amplifier has on the speaker.
High damping (turning the control to the right) increases the control of the speaker. The sound is
crisper and tighter.
* Low damping (turning the control to the left) decreases the control of the speaker. The sound is
looser and fatter, with slightly more presence.
There is no recommended setting because only you can tell what's best for the sound you want to
produce. We recommend that you start with the Variable Damping control set at 12 o'clock and
adjust from there. Ms control is effective ONLY when the speaker is connected to the "Variable
Damping Out" speaker jack.
9. 4-Ohm, 8-Ohm Speaker Jack: You can use these jacks to match the amp impedance to the
input of the speakers you use. (Proper connection to these jacks will give you maximum power
and maximum damping.)
If you choose to run an 8-Ohm speaker in the 4-Ohm jack, no damage will result in the amp or
with the speaker, it will just sound different from being played through the 8-Ohm jack. The same
situation is possible with a 4 ohm speaker in the 8 ohm jack.