Acoustic Energy Stereo Amplifier manual Coda R and Corus Control Panel, Power amp, Effects Loop

er

h Freq

Ch 2

effects send

		Ch 2
		on/off
Ch 2		Effects
	Effects	level
effects
switch
	H R P D AC F
	Prog switch

Ch 1 effects

switch

Ch 1

effects send

Return
level	Ch 2
	effects
	return
I/O buss
Mute	Master
	level
Switch		Direct	Ground
		out	lift
Pre/Post
Switch
	Ch 1
	effects
Return	return
level

remove a given feedback frequency to reduce feedback “howl”. The low cut filter is used to reduce the bass output in cases where room location or instrument/pickup combination results in “boomy” sound. To use either, push the on/off switch to turn on the filter circuit then select the filter type using the notch/cut switch. Start with the control fully counterclockwise and gradually turn it clockwise until the desired effect is achieved. Experiment with the position of the control to give you the sound you like best.

Effects Loop

Acoustic Image preamps have output (“Send”) and input (“Return”) capability in each channel to allow you to use effects boxes. The send output is affected by the input volume and tone controls and can also be used as a preamp output for driving other power amplifiers. The Return input can be used to directly connect an external preamp to the unit’s power amp. The effects level control in each channel controls the volume of the returned (“wet”) signal relative to the original (“dry”) signal. Because the effects loop is a parallel type, plugging something into the send output does not interrupt the signal path. So, a tuner can be plugged into the send output without affecting the signal going through the amp. When the effects loops are not used, the level controls should be set at zero.

The return input can also be used as an auxiliary input for connecting other line level signals such as a CD player.

Direct Out

Speaker

Out 1 (internal connection on combo amps)

Speaker

Out 2

Power amp

An XLR jack is provided for a Direct Out connection that allows the system’s output to be fed to mixing boards of house PA systems or recording studios. As a result, the instrument amplified by the unit can be recorded or further amplified by the house PA system. In the Coda R and Corus combos, the Direct Out signal is the combined output of the two channels. A switch is provided to allow you to select whether the output from the Direct Out jack is affected by the input level and tone controls (post EQ) or not (pre EQ).

With the switch in the post EQ position, the input level control affects the level of the Direct Out signal, the master level does not. This allows independent adjustment of the “stage” volume (the volume coming from the combo amp) and the “house” volume (the volume in the house PA system) when the unit is used as a stage monitor. Once the level has been set for the house, if more

Phantom	Channel 2			Effects	Send	Notch Cut		Filter	Ch 2	Ambient
				Loop				70
									Delay Chorus
									Plate	Flange
									Off On Room
							30	800	Hall
Level	Bass	Mid	Treble	Level				Freq			Power
Input					Return	Off	On		Ch 1	Effects	Level
				Effects				Filter	Post
Phantom	Channel 1				Send	Notch Cut				Mute
				Loop				70	EQ
									Off On
							30	800
Level	Bass	Mid	Treble	Level				Freq	Master
Input					Return	Off	On		Ch 2	Ground
										lift	Direct Out

Coda R and Corus Control Panel

volume is needed on stage, the master level can be increased. This will increase the stage volume but not the volume in the house PA.

A ground lift switch is available to “lift” the ground from the output of the direct out--reducing noise should a ground loop create hum when the unit is connected to a mixing board.

Mute Switch

A switch is provided to allow you to mute the output of the amplifier without having to turn the amp off. This will allow you to tune your instrument on stage without being heard. The amp output and direct out signals are both muted by the switch.

5 6