Engl Straight User Manual

Straight

Guitar

amplifier

Operator´s Manual

Please, first read this manual carefully!

Straight: 2-channel all-tube guitar amplifier.

Models:

E401: Combo 50 Watts; E402: Head 50 Watts;
E403: Combo 50 Watts special (3 channels), E404: Head 50 Watts special (3 channels);
E501: Combo 100 Watt; E502: Head 100 Watts;
E503: Combo 100 Watts special (3 channels), E504: Head100 Watts special (3 channels);

Features:

Two basic channels Clean and Lead, 3-Band-EQ in every main channel, Accutronics reverb spring,
Master and Presence controls for the power amp, serial Effects Loop and 0dB Line Out. The
channel Clean/Lead switching can be executed via a footswitch. In addition to the Clean/Lead
channel switching the special models allows remote control of the Lead Boost and the Reverb
via a double footswitch. This functions can also be controlled via MIDI if a MIDI Switcher (e.g.
Z-11, optional) is connected to the footswitch jacks.
You will find guidelines on care and maintenance of tube amps on the last page of the manual.
Please read and heed these before operating your amp. All crucial information pretaining to the
operation of this amp is preceded by "NOTE" or "CAUTION." Please read and heed these as well.

Front

Input: Unbalanced 1/4" input jack.

Clean channel controls:
Volume: Gain and Volume control for the Clean channel (in front of the FX loop).
Bass: Bottom end voicing control.
Middle: Mid-range voicing control.
Treble: Upper range voicing control.

Clean channel sound switches:
Gain Boost: Bass and Gain boost of the input stage.
Frequency Shift: Boosts the mid frequencies between 300 and 500 Hz.
Bright: Alters the EQ by boosting the upper treble range.
Treble Shift: Boosts the high mids between 1 and 3 kHz.

Lead channel controls:
Leaddrive: Gain for the Lead channel, controls the amount of preamp overdrive

in the Lead mode.
CAUTION: Extremely high gain and volume levels in the Lead mode can produce strong
feedback. Avoid feedback squeals, they lead to hearing loss and damaged speakers!

Bass: Bottom end voicing control.
Middle: Mid-range voicing control.
Treble: Upper range voicing control.
Lead Volume: Volume control for the Lead channel (in front of the FX loop, affects the SEND level).

Lead-channel switches:
Clean/Lead: Channel selector switch for Clean and Lead; This feature can also be switched

via the footswitch jack "Clean/Lead" located at the rear panel: the channel selector
switch is deactivated once a footswitch is connected to the footswitch jack.
The red LED beside this switch indicates Lead channel activ.
Lead Boost: Switching between Soft and Heavy Lead mode by boosting the amount of
overdrive in the preamp. This feature can be also acessed via a double footpedal
connected to the stereo jack that is located at the rear panel of the amp but in the
special models only. Once a footpedal is connected, this switch is deactivated.

Mid.Shift: Boosts the mid frequency at 500 Hz.
Bright: Alters the EQ by boosting the upper treble range.
Bypass: Defeats the EQ (Bass, Middle, Treble) of the Lead channel.

Poweramp:
Presence: This control defines the Treble response in the poweramp stage.
Master: Master volume control for power amp output (located post FX loop).
Stand By: Poweramp standby switch.
Power: AC power on/off.