Compressor; Technical Specs - AER Amp One Manual

5.3 Compressor

A compressor is an electrical circuit (a device) that can
be used to influence the dynamic behavior of a signal.
The aim of this can be to reduce the risk of clipping, for
example. In the application, the change in the signal
(level change) is kept constant from an operating point
(threshold) in the set ratio.
Ratio is kept constant.. The diagram illustrates the rela-
tionship. Input level (X = IN) and output level (Y- = OUT)
are shown in dB on the axes.
input level and output level are the same along the 45°
line - this corresponds to a compression ratio of 1:1 - i.e.
no compression.a compression ratio of 4:1, for example,
means that any further increase in level above the
threshold is kept constant at a ratio of 4:1.
If the input level increases by a factor of 4, the output
level only increases by a factor of 1.
Louder signal components are attenuated and the
overall level becomes quieter. This difference in level
can usually be easily compensated for by increasing
the overall volume. The audible signal then appears
louder and denser overall, as the quiet and loud signal
components come closer together, as it were.
At a compression ratio of "infinity" to 1 (ratio ∞ : 1), this
is no longer referred to as compression, but as limiting
(limiter). The AER compressor circuit offers compression
ratios from 1:1 to 5:1.
dB
threshold
1
1
16
ratio 2:1
ratio 4:1
∞
ratio
IN
dB
6. Tech. specifications
Single-channel amplifier for electric basses
input
aux in
headphones
line out
sub out
send
tuner
DI out
insert pre eq
insert post eq
footswitch
: 1
colour
bass
bass boost
middle
treble
High-impedance instrument input
Mono jack,
Sensitivity:
Impedance:
Equivalent input noise:
A-weighted
high / low switch:
Stereo jack,
L + R mixed and added pre master but post
tone controls.
Level control.
Sensitivity:
Impedance:
Output voltage: 1.1 V (20 mV input)
Power: max. 100 mW into 32 ohms
Internal speaker is muted when
headphone is plugged in.
Stereo jack, ¼" (6.35 mm)
For use with stereo headphones only.
Please do not connect anything with a mono
jack plug.
Switchable pre / post master
Mono jack,
Output voltage:
Subwoofer output without filter
Mono jack,
Output voltage:
Send for parallel effects loop
Mono jack,
Output voltage:
Tuner output, not affected by mute
Mono jack,
Output voltage:
Pre-master, switchable pre / post tone controls
and effects, level adjustable, balanced XLR
Output voltage:
Insert loop before tone controls,
after compressor
Stereo jack,
Output voltage:
tip = send, ring = return
Insert loop after tone controls
Stereo jack,
Output voltage:
tip = send, ring = return
Stereo jack, ¼" for dual footswitch
tip = footswitch for input muting
ring = footswitch for parallel effects loop on/off
sleeve = common (ground)
mute switch disabled when footswitch
is plugged in
–1 dB at 300 Hz, +8 dB at 3.7 kHz
±8 dB at 80 Hz
+10 dB at 55 Hz
±15 dB at 200...2000 Hz (adjustable)
Bandwidth (switchable, note 3):
wide: 1.6 octaves (Q = 0.37)
narrow: 0.6 octaves (Q = 1)
±12 dB at 6 kHz
¼" (6.35 mm)
22 mV (-33 dBV)
1 Megohm
2 μV (–114 dBV),
10 dB attenuation
¼ " (6.35 mm)
2 x 185 mV
22 kΩ (each channel)
¼" (6.35 mm)
2.3 V
¼" (6.35 mm)
2.3 V
¼" (6.35 mm)
900 mV
¼" (6.35 mm)
900 mV
output.
0...370 mV
¼" (6.35 mm)
900 mV
¼" (6.35 mm)
900 mV