Standby
Power
On
Off
Resonance
Bright
Deep
Inputs
Passive
Active
Gain
0
5
10
0
5
10
0
5
10
0
5
10
200
1.0K
3.0K
Master
0
5
10
Bass
Mid
Treble
Frequency
Hz
YBA300
ALL
TUBE
Bassmaster
0
-6
4
Bias
High
Low
Protect
Bias Ref
A
Return
Circuit
Breaker
Send
D.I. / Line Out
Lift
Gnd
Pre
Post
Effects Loop
Out
D.I. EQ
Ground
Tuner
Speaker Load
with ALL Speakers
Connected
ATTENTION: Before powering unit on,
make sure speakers are connected
SPEAKER OUTPUT
Effects / D.I. / Tuner
Impedance
4
2
THIS UNIT MUST BE GROUNDED!
CET APPAREIL DOIT ETRE MIS Á TERRE!
DISCONNECT POWER
BEFORE SERVICING!
DEBRANCHER L’APPEREIL
AVANT D’ENLEVER
LES COUVERCLES!
• E
STA
BLISHED 19
63
•
•
Q
U
AL
ITY
& INNOVA
TIO
N
•
DISCONNECT POWER WHEN REPLACING TUBES.
USE MATCHED TUBE PAIRS ONLY!
DÉBRANCHÉ L’APPAREIL AVANT DE
REMPLACER LES LAMPES. UTILLISEZ
SEULEMENT DES LAMPES EN PARIÉS!
Bias
High
Low
Protect
B
Bias
High
Low
Protect
C
Bias
High
Low
Protect
D
Bias
High
Low
Protect
E
Bias
50 mV
High
Low
Protect
F
50 mV
50 mV
50 mV
50 mV
50 mV
ATTENTION: When replacing tube pairs, or as tubes age,
the bias will require adjustment. The blue LED
indicates the setting is too low, the amber LED that the
setting is too high. Rotate the control until it is
halfway between the points where the LEDs come on.
An illuminated red LED indicates that the corresponding
tube pair has gone into Protect mode. That tube pair
should be replaced. The unit will continue to operate
with up-to five failed pairs.
NOTE: All ‘Protect’ and ‘Low’ LEDs are illuminated
when the unit is in standby mode.
YBA300
A-Z1170R / 1v3
230V
50Hz
1,75A
120VAC
60Hz 3.25A
POWER
PREAMP
SPLITTER
6L6
V1C
6L6
V1D
6L6
V1E
6L6
V1F
6L6
V1A
6L6
V1B
6L6
V2C
6L6
V2D
6L6
V2E
6L6
V2F
6L6
V2A
6L6
V2B
12AX7
V3
12AX7
V4
12AX7
V5
DRIVER
12AU7
V6
TRAYNOR YBA300
POWER
PREAMP
SPLITTER
EL34
V1C
EL34
V1D
EL34
V1E
EL34
V1F
EL34
V1A
EL34
V1B
EL34
V2C
EL34
V2D
EL34
V2E
EL34
V2F
EL34
V2A
EL34
V2B
12AX7
V3
12AX7
V4
12AX7
V5
DRIVER
12AU7
V6
TRAYNOR YBA300
