User Manual
21 Balanced Line Out Frequency Compensated: The frequency-corrected, balanced Line output jack
(¼ stereo jack: tip and ring routes the balanced signal, shaft = Ground/Shield). This signal can be
routed directly to a mixing console or a recording unit. The line out is located post poweramp in
the signal chain, so ensure the poweramp is activated.
If you wish to run the amp without driving a speaker, the built-in Power Soak (25) can provide
the necessary load for the power amp. To do this, simply set its Selector to "Speaker Off".
Then you can run the amp without a speaker or cabinet connected.
Important note: in the aforementioned case a speaker may not be connected to the
Poweramp Output "A" (22) because a ¼" jack plug inserted to jack 22 would disable
the Power Soak circuit!
Heads up: Make sure the balanced cord's shielding is grounded at one end only; that is, either at
the amp or at the mixer or recorder. Connecting two devices to the same ground (e. g. via the
mains ground) can cause a ground loop that you will recognize as audible humming!
You may find it necessary to sever the connection between the shielding and ground on one
of the stereo ¼" cord's two plugs.
A tip from the designer: The Line Out's output level is influenced by the following factors: By the
input level (Clean Gain), the Volume control settings in the Lead channel, to some degree by
voicing control (EQ) settings, and by the Master volume level. First dial in the desired sound
combination at the front panel. Then adjust levels at FX devices or signal processors (if connected).
Use the respective device's input sensitivity or gain control for level adjustments.
You can also tap the line out signal at this jack using an unbalanced cord with a mono plug;
that is, with one wire carrying the signal and the shielding providing the grounding.
An internal resistor protects the second output against short-circuits.
(Note: This applies to the Line Output only!)
22 Poweramp Output A, 8 - 16 Ohms, full power: output jack "A" for the connection of one 8 ohms
(eg. the Combo amp's internal speaker) or one 16 ohms speaker without the internal power soak
circuit. This speaker output has priority with respect to speaker output "C": a ¼" jack plug
connected to jack "A" disables speaker output "C" (24) and the power soak circuit.
23 Poweramp Output B; 8 Ohms serial to jack A: This is an auxiliary output connected in series with
Output "A" (jack 22). This output is designed for one application for only—when you are driving a
combination of two 8-ohm cabinets (speakers). This output may only be used when an 8-ohm
speaker or cabinet is connected to Output "A" (jack 24). A typical application: the Combo amp's
internal speaker connected in series with an 8 ohms cabinet, e.g. the ENGL type E112 or E412.
CAUTION: If you intend to use one 8 or 16-ohm cabinet only, make absolutely certain you connect
it to Output "A" (jack 22). Output "B" (jack 23) is only enabled when a speaker is connected to
Output "A" (jack 22).
24 Poweramp Output C; 8 - 16 Ohms, Power Soak: output jack "C" for the connection of one 8 ohms
(e.g. the Combo amp's internal speaker) or one 16 ohms speaker (cabinet) including the internal
power soak circuit. The Power Soak circuit sits between this speaker output and the power amp.
You'll find some important info on this circuit in section 25, please read carefully before operating
the Power Soak!
NOTE: Never operate the amplifier without a sufficient load, otherwise you may damage or
destroy the power amp!
When set to "Speaker Off," the Power Soak provides an adequate load for the power amp.
Speaker/cabinet options:
1. one 8 ohms cabinet (or the internal speaker) connected to jack "A" without the Power Soak;
2. one 16 ohms cabinet connected to jack "A" without the Power Soak;
3. two 8 ohms cabinets connected to jack "A" and jack "B" without the Power Soak;
4. one 8 ohms cabinet (or the internal speaker) connected to jack "C" including the Power Soak;
5. one 16 ohms cabinet connected to jack "C" including the Power Soak;
Note: Selecting the "Full Power" setting deactivates the Power Soak!
* Another option
would be to connect
two 16-ohm cabinets
in parallel instead of
one 8-ohm cabinet.
Speaker / cabinet options
* 8
or
16
or
8 8
and
* 8
or
16
or
or
with Power Soak
with Power Soak
A
A
A B
C
C
Footswitch
Tube Guitar Amplifier
RockMaster
20
Combo: Type E302
Head: Type E307
MetalMaster 20
Combo: Type E304
Head: Type E309
Amp-Design by
Horst Langer
ENGL Amps
Made In Germany
CAUTION !
!
REPLACE FUSE
ONLY WITH SAME
TYPE AND RATING !
R
Clean
/
Lead
Mid Shape
DO NOT OPEN !
RISK OF ELECTRIC SHOCK !
DO NOT EXPOSE THIS
EQUIPMENT TO
RAIN OR MOISTURE !
FX Loop
Send Return
8 - 16
Ohms
full power
Frequency
Comp.
Line Out
Balanced
Reverb
FX Loop
off
/
on
8 Ohms
serial
to jack A
Poweramp Output
8 - 16
Ohms
Power Soak
A
: connect one
8 or 16 ohms speaker
to this output jack for
full output power.
Output C is disabled
once a plug is connected
to output jack A.
B: connect an additional
8 ohms speaker to
a 8 ohms speaker
connected to output A.
C: connect one
8 or 16 ohms speaker
to this output jack when
employing the Power Soak.
A B C