Two-Rock studio 50-15, Owner'S Manual

Page: 3 / 9

Front Panel Functions
1.
Input Jack
- High impedance input to the amplifier. Plug in your instrument here.
2. Push/Pull Treble Control
- Adjusts the high frequency response. In the full counter-clockwise
position, high frequencies are cut. In the full clockwise position, high frequencies are allowed to
pass to the
gain stage. When the knob is in the “out” position, the high frequency response is
boosted. This is most effective when the input gain is set at 12 o’clock or lower. The effect is less
dramatic as the
gain control is adjusted past the 12 o’clock position.
3. Push/Pull Mid Boost Control
- Adjusts the mid-range response. In the full counter-clockwise
position, the tone will be somewhat “scooped” of mid-range response, emphasizing the highs and
lows. In the full clockwise position, mid-range frequencies are allowed to pass to the gain stage.
When the knob is in
the “out” position, the EQ section is passively bypassed boosting the natural
high and mid frequencies of the guitar. It also increases the amount of input signal that drives the
gain stage.
4. Push/Pull Bass Control - Adjusts the bass response. In the full counter-clockwise position, low
frequencies are cut. In addition, the response of the treble and mid-range controls is greatly
reduced. In the full clockwise position, low frequencies are allowed to pass to the gain stage.
When the knob is in the “out” position, the low and low-mid frequencies are boosted. This is a low
frequency contour switch, changing the low and low-mid response.
5. Gain -
Adjusts the overall gain of the amplifier. Start with this control in the 12 o’clock position.
6. Master Volume
- Adjusts the output level of the amplifier. Also acts as the send level control for
any effects inserted in the loop when the loop is in its passive state
7. Contour - The contour cont
rol is an active wide band sweep. In the 12 o’clock position, the
amps’ frequency response is flat. Counterclockwise rotation reduces high end response and
increases low frequencies. Clockwise rotation decreases low end and increases the high
frequency response. This control is very useful for maintaining preamp tone control settings, while
allowing a global adjustment to compensate for differences in room acoustics, speaker cabinets,
or bright to dark guitars (PRS Humbucker to Strat, for example). This control also actively reduces
the articulation available, allowing a softer setting or extremely open and revealing, depending on
your individual style and requirements.
8. Standby-
This switch has 3 positions, High-Standby-Low. Each position is tied to its own bias
control. This is located under the amp; refer to tube compliment/Bias chart.