A wonderful amplifier - serial number 33 - from Two Rock. This amplifier has the capability to glisten like sun sparkling on water or roar like thunder and lightning. All comfortably controlled via the on-board controls (see below) or the footswitch (supplied). The example for sale here is in great condition - the only slight imperfection is a kind of graze to the material on the front. It's Not a tear, and I've tried to show it as best I can in the pictures. But this amplifier in its beautiful blue finish looks and sounds incredible. Extremely versatile and toneful at every setting. Check out the list of players that use Two-rock amps, starting with john mayer, and you'll understand that they lay the foundation for some very serious tone.Comes with power cord and manualNOW OFFERING FREE SHIPPING (WITHIN AUSTRALIA ONLY).From the manual: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 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 mid frequencies are boosted
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.
7. Expansion- This feature cuts the EQ section out of the signal path allowing more input signal to hit the gain stage. With it engaged it will affect the natural Highs and Mids of the tube at the input section. This adjustable control allows how much gain passes through and as it is turned up (clockwise) it will increase the amount of high and mid frequencies. (Feature is Foot-switchable)
8. Reverb Send- The reverb drive control determines the amount of signal applied to the reverb tank. Low settings will create a very open, small room reverb effect with a short decay time. Advancing the control clockwise increases the signal applied to the driver and a very saturated effect with a sharp attack and a long decay can be obtained.
9. Reverb return- The reverb return control mixes the reverb effect signal with the dry signal. At full counterclockwise rotation, the reverb effect is defeated. Using the return control in conjunction with the reverb drive control, a wide range of natural reverb effects can be produced.
10. Tremolo Speed- Adjusts the rate of the tremolo circuit
11. Tremolo Intensity- Adjusts the amount of tremolo that is being created.
(Feature is Foot-switchable)
Rear Panel Functions
1. A/C Input- Connects the amplifier to A/C power via the power cord supplied. Please check to make sure you have the correct cable for the voltage rating of your country.
2. Fuse- See Fuse Chart
3. Power Switch- Turns power on.
4. Speaker Output Jacks- There are 3 speaker output jacks; 4, 8, and 16 ohms. NEVER OPERATE YOUR AMPLIFIER WITHOUT A PROPER SPEAKER LOAD CONNECTED. Be sure to match the impedance of your cabinet with the impedance (output) of the amplifier.
5. Global Contour- The contour control is an active wide band sweep. In the 12 o’clock position, the amps’ frequency response is flat. Clockwise rotation reduces high end response and increases low frequencies. Counterclockwise 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.
6. Return Level- This control has a pull-bright function. The loop is active in the circuit even with no effects connected, so the level control acts as a master volume. The pull-bright feature is useful when playing at low volume (a low fx control setting) or when a large number of outboard effects are used in the loop, which sometimes causes high frequency insertion loss.
7. Effects Send- Use this jack to send the amplifiers signal to outboard effects.
8. Effects Return- Use this jack to connect the output of your effects to the amplifier.
9. Pickup Loading- This control has 5 settings. In the first position (fully counterclockwise), there is no additional pickup loading, with 4 additional settings available. Fully clockwise (last position) is full loading. Loading the guitar pickup(s) to varying degrees changes the impedance relationship between the pickup and the amplifier’s first gain stage. Loading reduces inductive “ringing” in the pickup coils. The effect is a more controlled high frequency response and a reduction in high frequency artifacts produced when a pickup’s magnets and coils feed back with each other, usually at or near the pickup’s saturation point. The damping effect will also reduce the gain, which is normal. Tonally speaking, reducing these artifacts results in a cleaner waveform and an apparent lack of harshness in the upper frequencies.
10. S/N- Your serial number is located here.
11. Footswitch Jack- The footswitch connects here using a ¼” stereo cable. The Expansion and Tremolo functions can be activated via the footswitch. The respective front panel Push/ Pull pots must be in the “off,” or “in” position, to enable the footswitch functions....and not forgetting the superb speakerThe original G12M of the 1960s was Celestion's first guitar speaker to use a ceramic magnet and paved the way for high power guitar amplifiers. The G12M uses a medium weight magnet to produce a sound that is smooth and warm but bright enough to hold its own against any rock backline.Known simply these days as the 'Greenback', the G12M's fabled 'brown tone' is characterised by a warm, controlled low-end, a rich, vocal mid-range and a delicate, detailed top-end. Loaded into a 4x12 and driven hard, these speakers exude warm, crunchy chords and sweet searing single-notes.