© 1995-2007 CORNELL Musical Equipment Design & Development
5
Controls
1. Input -
Hi & Lo
High impedance input connections for instruments
Input Hi provides 6db more gain than the Lo input.
2. Treble Volume
Adjusts the gain of Channel 2.
3.
Normal Volume
Adjusts the gain of Channel 1.
4. Bass
Adjusts the amount of low frequency boost.
5. Treble
Adjusts the amount of high frequency.
6
.
Middle
Adjusts the amount of mid frequency boost.
7.
Presence
Adjusts the high frequency feedback from the output stage.
8. Mains Indicator
When illuminated, this indicates that the valve heaters are on, and that there is
power to the amplifier.
9. Standby Switch
When operated, this cuts the HT voltage to the amplifier. Use standby mode for
breaks in usage (eg, between performance sets)
10. 45/50 Switch
This changes the rectifier from valve (45) to semiconductor (50). The valve
rectifier gives a bluesy ‘sag’ in output, while the semiconductor rectifier has a
faster response and less sag, improving transient attack.
11. High/Low Switch
Reduces the output to 15 Watts.
12. 8-16 Switch
Output speaker impedance.
If you have a Cornell 2 x 12 speaker cabinet, set this switch to 16 Ohms.
Should you use two 16 Ohm cabinets, switch to 8 ohms.
13.
Mains Fuse
The fuse holder contains the mains fuse to the amplifier. The mains fuse
protects the amplifier from electrical faults.
Replace a failed fuse only with the same type and rating.
Do not operate the mains switch without a 30 second delay between
operations.
There is an internal thermistor to reduce mains surges. This
protects the amp and helps to ensure a long life for the components. The
thermistor works by introducing a resistance in the circuit when the power is
switched on. Within a few seconds the thermistor heats up and its resistance
reduces, allowing the full current to flow into the mains transformer. After
switching off the amp, it takes a few seconds for the thermistor to cool down
and to return to its initial, protective resistance value.
