WARNING!
To prevent fire shock hazard, do not expose
this appliance to rain or moisture. No user
serviceable parts inside. Refer servicing to
qualified service personnel.
I
NFORMATION FOR QUALIFIED SERVICE PERSONNEL ONLY
!
H
OW TO
C
HANGE
T
HE
T
UBE
1)
2)
3)
4)
Remove the power from the unit and wait at least five
(5) minutes.
Carefully remove the chrome tube cover by losing the
four (4) holding bolts.
Replace the tube with same type, i.e. ECC83/12AX7.
Attach the four mounting screws using moderate
tension.
T
HE
F
ILTERS
The EBS ValveDrive is equipped with classical style passive filters
especially tuned for bass guitar. The following graphs show the
frequency response of the BASS, MIDDLE and TREBLE controls.
T
ECHNICAL
S
PECIFICATIONS
EBS V
ALVE
D
RIVE
Nominal Input Level
-10 dBv
Pad Attentuation
10 dB
Tube Type
Ruby Tubes
12AX7 AC5 HG+
Power Requirements
9V DC, 700 mA,
Connection:
Center Negative
Dimensions
Width
135
Height
75
Length
165
(6
)
Weight
960 g (2.1 lbs.)
Input Impedance
1 Mohms
Frequency Response
+0/-3 dB
35 - 20.000 Hz
Gain Range
min/center/max
-
/ +6/ +26 dB
Filter Section:
Bass:
type:
Bell
Attenuation:
0 - 15 dB < 80 Hz
Middle:
type:
Notch
Attenuation:
0 - 12 dB @400 Hz
Treble:
type:
Shelving
Attenuation:
0 - 6 dB @5 kHz
Output Impedance
100 ohms
Nominal Output Level
Unbalanced
-10 dBv
Balanced
-20 dBv
Pin 2 pos, 3 neg
mm (5.3")
mm (3.0")
mm
.5"
Specifications are subject to change without notice.
EBS Sweden AB · Grindstuvägen 44-46 · SE-167 33 Bromma · Sweden
Phone: +46-8-7350010 · Fax: +46-8-7350005
Web: www.ebssweden.com
E-mail: [email protected]
B
LOCK
D
IAGRAM
EBS V
ALVE
D
RIVE
F
LAT
F
REQUENCY
R
ESPONSE
The special case when you
want a flat frequency response
from the passive filters is
obtained when BASS and
TREBLE controls are set to
MINIMUM, and the MIDDLE
control is set to MAXIMUM.
T
REBLE
B
ASS
M
IDDLE
Note: In each graph the other two
controls are set to maximum position.
