16
6. Technical specifications
Inputs
channels 1-4
Instrument / line / microphone input
Connector:
Combo (jack and XLR)
Instrument / Line input (6.35 mm jack)
High impedance unbalanced input, for
instrument pickups or as universal line input
Connector:
¼” (6.35 mm) stereo* jack
*Ch. 1 and ch. 3 have phantom power which uses
the ring of the stereo jack.
Nom. input voltage:
100 mV (–20 dBV)
Min. input voltage:
20 mV (–34 dBV)
Max. input voltage:
5 V (+14 dBV)
Input impedance:
2.2 MΩ || 300 pF
Signal / noise ratio (A-weighted):
88 dB
Equivalent input noise voltage (A-weighted):
4 µV (-108 dBV)
Phantom power (ch. 1 / 3 only):
9 V DC
Load current (per channel):
max. 20 mA
Switchable
Short circuit protected
Microphone input (XLR)
Balanced input for microphones
Connector:
XLR female
1 = ground
2 = positive (+)
3 = negative (–)
Nom. input voltage:
10 mV (- 40 dBV)
Min. input voltage:
4 mV (- 48 dBV)
Max. input voltage:
1 V (0 dBV)
Nom. source impedance:
200 Ω
Input impedance:
1.2 kΩ
Voice filter (referred to 10 kHz): -10 dB at 270 Hz
Signal / noise ratio (A-weighted):
80 dB
Equivalent input noise voltage
(A-weighted):
1 µV (-120 dBV)
Phantom power:
48 V DC
Supply resistors:
6.8 kΩ
Load current (per channel):
max. 10 mA
Switchable in ch. 1 and 3
Permanent in ch. 2 and 4
clip indicator
Indicates imminent distortion in input channel
Headroom
approx. 5 dB
aux in L/R
Auxiliary stereo input with level control
Connector:
dual ¼” (6.35 mm) mono jack
Nom. input voltage:
500 mV (–6 dBV)
Min. input voltage,
using one input:
200 mV (–14 dBV)
using both inputs:
100 mV (–20 dBV)
Max. input voltage:
4.5 V (+13 dBV)
Input impedance:
22 kΩ
couple in
Balanced input with level control for connecting
to DI-out of another amplifier
Connector:
XLR female
1 = ground
2 = positive (+)
3 = negative (–)
Nom. input voltage:
40 mV (–28 dBV)
Min. input voltage:
20 mV (–34 dBV)
Max. input voltage:
6 V (+16 dBV)
fx return
Input for external parallel effect loop, also useful
as an extra line input
Connector:
¼” (6.35 mm) mono jack
Nom. input voltage:
330 mV (–10 dBV)
Input impedance:
20 kΩ
Outputs
line out L/R
Preamplifier output post master, tone controls,
aux in, and effects
Connector:
dual ¼” (6.35 mm) mono jack
Nom. output voltage:
1 V (0 dBV)
Output impedance:
47 Ω
Min. load impedance:
2 kΩ
Residual noise (A-weighted):
4 µV (–108 dBV)
headphones output
Connector:
¼” (6.35 mm) stereo jack
Output power for different headphone
impedances:
8 Ω
2 mW
32 Ω
10 mW
2000 Ω
70 mW
Nom. output voltage, no load:
18 V
Output impedance:
1000 Ω
Residual noise (A-weighted), referred to rated
output power:
–99 dB
When plugged in, the speaker is muted.
fx send
Output for external parallel effect loop (post tone
controls, but pre aux)
Connector:
¼” (6.35 mm) mono jack
Nom. output voltage:
300 mV (–10 dBV)
Output impedance:
47 Ω
Min. load impedance:
2 kΩ
tuner
Tuner output (post tone controls, but pre aux
and effects)
Connector:
¼” ( 6.35 mm) mono jack
Nom. output voltage:
100 mV (–20 dBV)
Output impedance:
47 Ω
Min. load impedance:
2 kΩ
DI-out
Electronically balanced, non-isolated output
(post tone controls, but pre aux and effects)
Connector:
XLR male
1 = ground
2 = positive (+)
3 = negative (–)
Nom. output voltage:
40 mV (–28 dBV)
Output impedance:
2 x 47 Ω
Min. load impedance:
1 kΩ
DI-out 2
Same as DI-out, but switchable pre / post aux
and effects
Footswitch connectors
mute
Single footswitch for master mute
Connector:
¼” (6.35 mm) mono jack
Function:
Switch ON = amp muted
fx mute
Dual footswitch for int./ext. effects mute
Connector:
¼” (6.35 mm) mono jack
Tip = switch for internal effect
Ring = switch for external effect
Sleeve = common return (ground)
Function: switch ON = effect OFF
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