Technische Daten - AER Alpha Plus Bedienungsanleitung

6. Technische Daten

Technical data
Inputs
input 1 Switchable line or microphone input
Combo socket, XLR + jack ¼" (6.35 mm)
line mode (jack only)
Unbalanced high-impedance input for
instrument pick-ups and line-level sources
Min. input voltage: 16 mV (–36 dBV)
Max. input voltage: 7 V (+17 dBV)
Input impedance: 2 M || 300 pF
Equivalent input noise, A-weighted:
2.1 μV (–114 dBV)
mic mode (jack or XLR)
XLR (balanced), stereo jack (balanced), or
mono jack (unbalanced) microphone input
Min. input voltage: 2 mV (–54 dBV)
Max. input voltage: 1 V (0 dBV)
Input impedance (balanced): 1.2 k
Input impedance (unbalanced): 2.7 k
Voice filter: –10 dB at 260 Hz (ref. to 10 kHz)
Equivalent input noise, A-weighted:
0.7 μV (–123 dBV)
Phantom power: 48 V (XLR only), R = 6.8 k
per terminal, total current max. 10 mA,
short circuit protected.
input 2 Unbalanced high-impedance input for
instrument pick-ups and line-level sources
Mono jack, ¼" (6.35 mm)
Min. input voltage: 14 mV (–37 dBV)
Max. input voltage: 5 V (+14 dBV)
High / low switch: attenuator –10 dB
Input impedance: 2.2 M || 300 pF
Equivalent input noise, A-weighted:
1.2 μV (–118 dBV)
Optional phantom power (see notes): 9 V DC
at "ring" terminal, max. 100 mA, short
circuit protected
return Return input for effect loop
Mono jack, ¼" (6.35 mm)
Min. input voltage: 150 mV (–17 dBV)
Max. input voltage 5 V (+14 dBV)
Input impedance: 20 k (5 k if effect is
switched off by footswitch.)
clip LED Headroom: min. 8 dB
Outputs
headphones Headphones output. When plugged in, the
internal speaker is switched off.
Stereo jack, ¼" (6.35 mm), L / R connected
Max. output power: 2 x 65 mW / 1000 
Input sensitivity for 2 x 50 mW / 1000  :
19 mV (–35 dBV) at input 1, line mode
Output impedance: 470  (shared by L and R)
Note: Suitable for headphones with stereo
jack. Does not work with mono jacks.
line out Preamplifier output after master volume
Mono jack, ¼" (6.35 mm)
Output voltage: 1.4 V (+3 dBV)
tuner Tuner output
Mono jack, ¼" (6.35 mm)
Output voltage: 450 mV (–7 dBV)
DI-out Balanced XLR output before master, after
tone controls, without effects
Output voltage (differential):
190 mV (–15 dBV)
send Send output for effect loop, before master,
after tone controls
Mono jack, ¼" (6.35 mm)
Output voltage: 450 mV (–7 dBV)
Footswitch connector
footswitch Connector for a dual footswitch
Stereo jack, ¼" (6.35 mm)
tip = internal effect on/off
ring = external effect on/off
sleeve = common (ground)
Effect is OFF when the footswitch is ON.
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Alpha Plus - 2014_03_D
8
Tone controls
colour –3 dB at 700 Hz, +10 dB at 8 kHz, switchable
(input 2)
bass 8 dB at 100 Hz, shelf type
middle 6 dB at 800 Hz
8 dB at 10 kHz, shelf type
treble
Effects
Internal Built-in digital reverb
effect
External Parallel effect loop (effect blended with dry
effect sound), see send and return.
Power
Power amp 40 W / 4  at 1% THD, DMOS, monolithic I.C.
Dynamic range, A-weighted: 92 dB
Limiter Threshold 35 W / 4 
Analog Subsonic filter, adaptive peak limiter
signal
processing
Speaker 8" (200 mm) twin cone full-range speaker,
system bass reflex enclosure
Mains Mains voltage (depending on model):
power 100, 120, 230, or 240 V~, 50–60 Hz.
Power consumption: max. 100 W
Mains fuse Size: 5 x 20 mm
For 230 and 240 V models: T 1 A L
For 100 and 120 V models: T 2 A L
General
Cabinet 12 mm (0.47") birch plywood
Finish Waterbased acrylic, black spatter finish
Dimensions 265 mm (10.4") high
330 mm (13") wide
235 mm (9.25") deep
Weight 7.2 kg (15.9 lbs)
Definitions and conditions
Input and output voltages are RMS values for a sine signal and
1 kHz unless stated otherwise.
Tone controls in neutral position unless stated otherwise.
Min. input voltage: Required input voltage for 35 W / 4 
output, gain and master fully clockwise.
Max. input voltage: Allowable input voltage that does not
cause more than 1% total harmonic distortion, assuming
suitable control settings.
Output voltages refer to 50 mV (–26 dBV) at input 1, line mode,
gain and master max.
Equivalent input noise voltage: Noise voltage at speaker
divided by voltage gain of amplifier for white noise, for the
input under test. Gain and master fully clockwise, input
shorted, 20 Hz – 20 kHz, gain of unused inputs in zero
position.
Dynamic range of power amplifier: Ratio of output voltage at
limiter threshold to A-weighted noise voltage with master in
zero position.
XLR connectors pin assignment:
1 = ground, 2 = positive (+), 3 = negative (–)
Options
Microphone input can be attenuated by 5 dB by an internal
jumper, increasing the max. input voltage to 1.6 V (+4 dBV).
9 V phantom power for input 2 can be activated by an internal
jumper. When activated, operation without phantom power
is still possible by using a mono jack connector.
48 V phantom power for the XLR input can be deactivated by
an internal jumper. (The jack input does not have 48 V.)
Warning: External equipment may be damaged by
inappropriate use of phantom power.
Specifications and appearance subject to change without
notice.
TD20111208