ENGL E840 User manual

E840

Tube Poweramp 50/50

Operator´s Manual

T I P 1

This poweramp is designed for one speaker cabinet per channel. If you decide to connect
additional speakers, ensure you keep the overall impedance in mind! For instance, if you want to
connect two 8Z systems per side, you must first connect them in series and then to the amp's
16Z outputs.
If you are using a stereo speaker cabinet for both channels, ensure it actually operates in the
stereo mode, otherwise you may damage the power amp. A convincing stereo image is achieved
via a quality stereo effects processor and a separate speaker for each channel.
For a very compact setup we recommend the ENGL speaker cabinets E112 (loaded with one 12"
Vintage speaker; wide open panoramic sound with a punchy bottom and crisp high) or the
E210" cabinet (loaded with two 10" Vintage speakers; nicely balanced, warm tone with a burly
midrange). To achieve enormous bottom end, we recommend our flagship cabinets, the E212
and the E412.

T I P 4

The VOLUME A/B switching feature can be used for the following application: In combination
with a multi channel preamp, to activate two different volumes for each channel, for instance
one for rhythm work, the other for soloing.

Use this switch to silence (0 position) the amp when you take a lengthier break. The amp's tubes
stay warm, which means that it is ready to roll immediately when you switch it back to full
power. The standby switch is also well-suited for muting the amp for brief breaks, for instance
when you're switching guitars. If you choose to use just one power amp channel, ensure you
switch the other channel's STANDBY switch off. Never operate an active stereo channel without
a connected speaker, you may destroy the power amp!

T I P 5

The two functions VOLUME A/B and PRESENCE A/B can also be switched via the ENGL MIDI
Switcher Z- 11. Simply connect the 1/4" stereo jack (23) to the stereo input of the Switcher via a
cable equipped with 1/4" stereo plugs. You can control these switching functions via the
buttons on the Switcher. The respective functions (e, g. Volume B and Presence A) are saved to
the desired MIDI program locations. The ENGL MIDI Footswitch Z-12 is ideal for activating MIDI
programs. When used in conjunction with the ENGL MIDI Switcher Z-11, this durable footswitch
does not require a separate AC power pack. The requisite power is routed via the MIDI cable.

T I P 3

T I P 2

The PRESENCE A/B switching feature can be used for the following application: In combination
with a two-channel preamp (Clean/Lead) a possible option could be a setting of 1 to 4 o´clock
for the PRESENCE A controls and a setting of 8 to 12 o´clock for the PRESENCE B controls. Use
PRESENCE A when the preamp is in the clean mode, and PRESENCE B for lead tones.

In a ddition to a first clas s tu be tone, the 84 0 poweramp offers a num be r of
pr ac ti ca l fe at ur es i n a powe rf ul 2x50 watt package. E ac h of t he two stereo
ch an ne ls features two volume a nd two pr es ence controls (A and B), so you can
di al in diverse vo lume and pres en ce settings. Th e A /B controls a re switchable via
an ex ternal footswi tc h o r t hr ou gh MIDI commands via a MID I S wi tc her.
In te ll ig en t de si gn features, superior cr af ts ma ns hi p a nd finishing and q ua li ty
co mp onents are what this devi ce is al l about. However keep in m in d, th at a few
pr ec au ti on s will ra di ca ll y extend tu be l if e (see ha nd li ng a nd c ar e guidness).
Th e e nt ir e - Te am wo ul d l ik e t o t ha nk yo u f or yo ur fa it h i n o ur pr od uct; we
ho pe you derive a great de al of jo y and sa ti sf action f ro m your T UB E
PO WERAMP 840.
PL EA SE N OT E: Read the Operator's Manual carefully and tho ro ughly, e specially
th e Han dling a nd Ca re section as wel l as the guid el in es in bold-fac e typ e. Avoi d
op erating errors and potential damage to the amp b y he ed ing th e gu id elines and
ca ut io na ry remarks in this m an ua l. The fo ot no te s also co ve r a few convenient
po in ters an d inter es ti ng t ip s on several functio ns . These are lis te d below.

Front

1

Gain

Power amps' input sensitivity. This button
increases the gain level for both channels
at the INPUT jacks (24) and (25).

2

VOLUME LEFT A

volume control A for the left power amp.
This control is active if button A/B is in the
off position; LED does not illuminate.

3

VOLUME LEFT B

volume control B for the left power amp.
This control is active if button A/B is in the
on position (depressed); LED illuminates.

7

PRESENCE LEFT A

Treble control A for the left poweramp
channel; it is active if button A/B (9) is in the
off position; LED is not illuminating.

T I P 2

8

PRESENCE LEFT B

Treble control B for the left poweramp
channel; it is active if button A/B (9) is in the
on position; LED is illuminating.

T I P 2

STANDBY LEFT

left channel standby.

12

STANDBY RIGHT

right channel standby.

13

POWER

AC power on/off.

14

GAIN

TUBE POWERAMP 840/50

PRESENCE

A / B

L

EFT

A L

EFT

B R

IGHT

A

R

IGHT

B

STAND

B

Y POWER

R

IGHT

L

EFT

R

VOLUME

A / B

L

EFT

A L

EFT

B R

IGHT

A

R

IGHT

B

1

2 3 4 5 6 8 9 10 11 12 13 147

T I P 1

T I P 1

4

A/B VOLUME

switches between VOLUME A controls and
VOLUME B controls.

1. A/B button position off: VOLUME A

2. A/B button position on: VOLUME B,
indicated by the red LED.
This feature can also be switched via a
footswitch connected to jack 23;
the VOLUME A/B pushbutton is
deactivated once a footswitch is connected.

T I P 3

9

A/B PRESENCE

switches between PRESENCE A controls and
PRESENCE B controls.

1. A/B button position off: PRESENCE A

2. A/B button position on: PRESENCE B,
indicated by the red LED.
This feature can also be switched via a
footswitch connected to jack 23;
the PRESENCE A/B pushbutton is
deactivated once a footswitch is connected.

T I P 3

10

PRESENCE RIGHT A

Treble control A for the right poweramp
channel; it is active if button A/B (9) is in the
off position; LED is not illuminating.

T I P 2

11

PRESENCE RIGHT B

Treble control B for the right poweramp
channel; it is active if button A/B (9) is in the
on position; LED is illuminating.

T I P 2

T I P 5

T I P 5

5

VOLUME RIGHT A

volume control A for the right power amp.
This control is active if button A/B is in the
off position; LED is not illuminating.

6

VOLUME RIGHT B

volume control B for the right power amp.
This control is active if button A/B is in the
on position (depressed); LED is illuminating.

T I P 1

T I P 1