EBS ClassicT90 User Manual
E-M
AIL:
ebs.info@bass.se
WEB:
www.ebssweden.com
June 2009
D
ESIGNED AND DEVELOPED BY
EBS S
WEDEN AB
G
RINDSTUVÄGEN
44-46, SE-167 33 B
ROMMA, SWEDEN
+46-8-735 00 10, F
AX :
+46-8-735 00 05
U
SERS MANUAL
C
ONTENTS
: P
AGE
:
I
NTRODUCTION
2
F
RONT AND REAR PANEL
3
F
ILTERS
4
M
AINTENANCE
5
B
LOCK DIAGRAM
6
T
ECHNICAL SPECIFICATIONS
7
I
NTRODUCTION • GETTING STARTED
TECHNICAL SPECIFICATIONS
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.
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