AER amp one Specifications download pdf (Page 5)

Rear panel

Left to right

line out

pre/post master Switches the line output pre or post master

volume control

headphones Caution! Use only stereo headphones.

Please insert no mono cables!

line out Preamp output

sub out Unltered output for an active subwoofer

footswitch Stereo footswitch socket,

TIP = mute, RING = eect on/o

send Output to an external eects unit

return Input from an external eects unit

insert pre eq Insert loop pre EQ

insert post eq Insert loop post EQ

aux in Stereo input jack for connecting a CD player e.g.

tuner Output to an external tuner.

May also be used when input is muted

aux level Aux signal level control

hf level Additional treble control (has only eect

on the onboard speaker)

DI pre/post eq Selector switch for the DI output signal;

pre or post equalizer and eects

DI level Signal level control at DI output

DI out Balanced XLR output, pre master

ground lift Disconnects signal ground from protective ground,

thereby eliminating hum problems with so-called

ground loops. However, this button should normally

remain switched o (i.e. not pushed).

power on Combined power switch with fuse holder

and mains input socket

5. Operation summary

• Cabling and startup

Check if your local mains voltage (e.g. 120 V in the USA, 230 V in Euro pe) com-

plies with the required operating voltage for your amp two. The proper mains

voltage is printed on the rating plate on the rear panel of the unit, e.g. AC 230V

(AC means alternating current).

Please take care that the master and intensity controls are set to zero (left

stop) and all other controls to their center positions. Don’t forget the unobtru-

sive hf level control on the rear – it has a strong eect on the treble response!

The pushbuttons should be switched o (not pushed in). Next make all the

necessary cable connections (mains, instrument etc).

Now you may turn on your amp two with the power-on switch located on the

back. The green power control LED will indicate operational readiness.

• Level adjustment

Using the high/low switch and the gain control you can adapt dierent pick-

up systems or other signal sources to the amp two.

The best possible sound quality is achieved when the gain control is set neit-

her too high (distortions) nor too low (noise, too little volume). While playing

with a strong attack, turn the gain control clockwise until the clip indicator

ashes momentarily. Now turn back the gain control slightly (and also the

instrument’s volume control, if needed) to ensure an undistorted reproduc-

tion. The clip control LED should now only rarely ash. In case you have pro-

blems with that because the input signal is too strong, press the high/low

button as well.

Finally set the desired overall volume with the master control. With the mute

switch you can mute the amplier as required.

• Equalization

Hopefully we have designed the lters in such a way that you can use the EQ

network as a exible and universal tool which lives up to the great variety of

basses and voices. One more note: Adjusting the EQ controls can also aect

the level setting. Whenever you see the clip indicator ashing frequently, you

should slighty correct the gain setting (see ’Level adjustment’).

Tell us if we’re right!

However, we feel that it takes more to give the instrument a round, well-ba-

lanced sound. An extreme treble boost (inharmonic reproduction characteris-

tic, especially in connection with active bass electronics) will also increase hiss

and noise, of course.

• Compressor

All our ampliers oer a dynamics control (limiter). Furthermore you can also

activate a compressor in the instrument channel (aux-in remains unaected).

Besides using it as a mere bass eects device, the compressor can also help to

level out dynamic contrasts between dierent signal sources.

• Additional Connectors

headphones: Allows the connection of a stereo headphone set. Caution: can

only handle stereo jack plugs, please do not insert any mono jack plugs!

line out: This output provides the master signal including equalization and

e ects, e.g. for connecting an active extension speaker cabinet. The line out

pre/post master switch lets you select if or not the output signal level shall be

independent from the master volume control.

sub out: Allows the connection of an active subwoofer.

The footswitch jack allows the connection of a standard dual footswitch by

means of a stereo cable. With this the external eect (send / return) may be

switched on or o, in addition the mute function may be remote-controlled

(see also technical specications).

send and return: Using these jacks an external eects unit may be linked in

‚parallel’, i.e. the eect is blended with the original signal.

insert pre eq and insert post eq: Using these jacks an outboard device may

be linked pre or post equalization „in series“, i.e. the signal path will be inter-

rupted and the signal entirely fed through the outboard device. Connection

is normally made with a so-called splitter cable (stereo to 2x mono) – see also

technical specications.

aux in: Stereo jack input (left and right channel are summed) for a playback

signal (e.g. CD).

tuner: A tuner may be connected to this signal output. Thus any sound degre-

dation is prevented as the tuner is no longer connected directly to the instru-

ment. The tuner output may also be used after the amplier has been muted

with the mute switch.

DI out: Balanced pre master XLR output (suitable for linking the amp two di-

rectly to a PA system or for recordings). The DI out pre/post eq switch determi-

nes if the signal shall be output with or without equalization and eects.

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AER amp one Specifications Page 5

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