signal can be heard through the internal speakers or through the Headphone jack. This same proce- dure can be used for playing along with a drum machine, sequencer, etc.
Note: Inserting a plug into the Receive jack activates the Effects Blend control. The Effects Blend control “receives” this command through the ground created when inserting a 1/4" plug into the Receive jack. Therefore, best results will only be obtained by using a mono phone plug. If you must use a stereo plug, connect it by pushing in to the first “click” only.
If you are not hearing any effect through your speakers, check the position of the Effects Blend con- trol on the front panel.
FAN ON/OFF SWITCH
In the “On” position, the Fan On/Off switch activates the internal cooling fan when the internal heatsink reaches approximately 55 degrees C. The fan will shut off when the heatsink has cooled down to about 45 degrees C. This action is controlled by an internal thermal switch located on the heatsink.
The “Off” (or Defeat) position prevents the cooling fan from being operational. SWR recommends that this position be used ONLY in situations where normal fan noise might be audible and therefore prob-
Note: If you hear the fan operating after use, we recommend that you allow the fan to run until it turns itself off, prior to turning off the Power switch.
HIGH FREQUENCY ATTENUATOR
The High Frequency Attenuator adjusts the amount of high frequency heard through the horn/tweeter. Turning the Attenuator control clockwise increases the signal; turning the Attenuator control counter- clockwise decreases the signal. In the full
Note: Any clipping or unwanted distortion will be accentuated through the horn/tweeter. We have found that players using an especially “hard” technique to strike the strings can cause the strings to come in contact with the bass’s pickup and result in sharp spikes. If the clip indicators are not lit and you hear distortion coming from the horn/tweeter, try playing a little “softer.” Also, if using a bass with active electronics, check the battery.
INTERNAL SPEAKER CABLE
If you intend to use the Super Redhead’s internal speakers, make sure the speaker cable from the chassis to the input jack is properly connected. Switching the internal speakers off via the Speaker On/Off switch on the front panel will not harm the amplifier in any way.
EXTENSION SPEAKER JACK
The Extension Speaker jack is provided for connecting an external speaker enclosure. Adding an exter- nal speaker cabinet will increase the overall volume of your system and give you a “fuller” sound. When using an external speaker, make sure the total impedance of any external speaker enclosure(s) is no less than 4 ohms (the Super Redhead is designed to drive a minimum impedance of no less than 2 ohms). In most cases, we recommend the use of a single 8 ohm extension speaker.
8 • SUPER REDHEAD OWNER’S MANUAL