Technical Specifications - Alto HPA4 User Manual

4-channel headphone amplifier
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6. TECHNICAL SPECIFICATIONS

AUDIO INPUT
AUDIO OUTPUT
SYSTEM SPECIFICATIONS
POWER AMPLIFIER
FUNCTION CONTROLS
FUNCTION SWI CHES
T
INDICATORS
POWER SUPPLY
PHYSICAL
MAIN input
Connectors
Type
Impedance
Max.input level
CMRR
AUX IN and DIRECT IN input
Connectors
Type
Impedance
Max.input level
CMRR
Connectors
Type
Impedance
Max. output level
Frequency response
Noise
THD
Max.output power
Min.output impedance
Input level
Balanced per channel
Output level per channel
Treble
Bass
Left mute
Right mute
Mode
Input level
Output level
Mains voltage
Power consumption
Fuse
Mains connection
Dimension
Net weight
X R and 1/4" jack
L
HF filtered, servo balanced input
40 kOhms balanced, 20 kOhms unbalanced
+21 dBu balanced and unbalanced
typ.40 dB, >55 dB @ 1kHz
1/4" TRS (tip=left, ring=right, sleeve=ground)
unbalanced
>15 kOhms unbalanced
+21 dBu unbalanced
typ,40 dB, >55 dB @ 1 kHz
XLR and 1/4" jack
balanced /unbalanced
dependent on the input impedance
+21 dBu balanced and unbalanced
10 z to 50kHz,+/-3dB
H
>90dB, unweighted, 22 Hz to 22kHz (>95dB @ +4dBu)
0.005% typ.@+4 dBu, 1kHz, Gain 1
+21dBm
100Ohms
variable
mix between aux and main signal
variable
+15/-15
+15/-15
mutes the left signal of the respective channel
mutes the right signal of the respective channel
switches channel to mono
8-digit LED display: -18/-12/-6/0/+6/+12/ +18dBu/CLIP
8-digit LED display: -18/-12/-6/0/+6/+12/ +18dBu/CLIP
USA/Canada
U.K./Australia
Europe
general export model
40 W
95-120V~: T315mA L/210-240V~: T200mA L
standard IEC receptacle
483(W)
217
(D)
44
2.9kg(6.39lb)
11
120V , 60Hz
240V~, 50Hz
230V~, 50Hz
95-120V~, 210-240V~, 50-60Hz
(H)mm(19" 8.54" 1.7")

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