I
NTRODUCTION
•
G
ETTING
S
TARTED
T
ECHNICAL
S
PECIFICATIONS
2 7
INPUT:
Input Impedance
1 Mohms (passive)
100 kohms (active)
Nominal Input Level
-20dBv (passive)
-8dBv
(active)
TONE CONTROLS:
Bass Filter:
Type
Shelving
+/- 12 dB @ 80 Hz
Treble
Filter:
Type
Shelving
+/- 12 dB @ 8 kHz
PRESCENCE:
0 - +12 dB @ 5 kHz
(Pwr amp feedback)
BALANCED OUTPUT:
Output Level
nominal
- 10 dBv
XLR Connections
1-GND, 2-Hot, 3-Cold
Options
GND
Lift
POWER AMP:
Continuous Output Power
90 W RMS
Load Impedance
4 or 8 ohms
TUBE SELECTION:
Input / Filter
1x 7025 low noise
Balanced Output / Buffer
2x 12AU7
Power Amp Driver
1x 12AT7
Power Amp
2x 6550
AUXILIARY INFO:
Power Requirements
max
200 W
Mains Protection:
Fuse
T1.5A (230/240V)
T3.15A
(100/120V)
Dimensions (WxHxD):
537 x 267 x 243 mm
21.1 x 10.5 x 9.57”
Weight:
17.1 kg ( 38 lbs.)
Specifications are subject to change without notice!
B
UILDING THE SOUND
...
Your
EBS ClassicT90
features a
tone shaping circuit that will enable you
to create a variety of vintage bass sounds.
8.
The
bass
and
treble
filters are
basically of the boost/cut design.
This means that the controls
practically boost or cut the selected
frequency band.
9.
Gradually increase or decrease the
level and tone controls. Notice how
the sound is affected.
10.
Proceed to the
prescence
knob. This
control adjusts the high frequency
response of the power amp and lets
you define the "crunch" when
distorting the amp.
This was a brief tutorial of
EBS
ClassicT90
. As you go on further in this
manual, you will learn how to use and
utilize all of the useful features that the
EBS ClassicT90
offers you.
GOOD LUCK!
The
EBS ClassicT90
is an all tube
amplifier head, extremely easy to dial-in. It
is designed to match the EBS ClassicLine
cabinets in all styles and situations. The
sound of the ClassicT90amp is pure vintage,
yet with a recognizable transparent ’EBS’
sound that let your playing style and the
character of your instrument speak.
Versatility is provided by a carefully
designed EQ section. These brief tutorials
will help you to become acquainted with
some of the features of the
EBS
ClassicT90
.
G
ETTING STARTED
...
1.
Carefully unpack the bass head.
2.
Connect a speaker to the head. Make
sure that the impedance of the cabinet
match exactly with the output of the
T90.
3.
Turn down the Volume and set all other
controls to mid position.
4.
Power up the head and wait five(5)
minutes for the head to warm up. The
tubes should now glow.
5.
Connect your instrument to one of the
inputs. If your bass is active or has high
output it is recommended to use the
active
input, otherwise use the
passive
one.
6.
Toggle the
standby
switch so that the
associated lamp light up.
7.
Move over to the VOLUME knob and
adjust for the desired output volume.