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BASSBASE 400 - MANUAL

REAR PANEL:

FOOTSWITCH VARIMETRIC: Connect a standard single-channel footswitch to this jack. If you use a
HUGHES & KETTNER FS-1, its LED will illuminate when you activate the VARIMETRIC EQ.

I

TUNER OUT: Output jack for an external tuning device.

FOOTSWITCH 

FX LOOP:

Connect a standard single-
channel footswitch to this
jack. If you use a HUGHES

& KETTNER FS-1, its LED

will illuminate when you
activate the FX LOOP.

LINE OUT: 

The full-range signal from this jack can be sent

to a mixing console or additional power amp.

RETURN: Connect this jack to the FX processor’s OUTPUT jack.

‘t I

-

10 db SWITCH: 

Press this damping switch to

lower the signal level sent to the input of effects
processors expecting an instrument-level signal
such as stomp boxes.

C

MAINS SOCKET:

Connect the included
power cable (Euro-
norm) to this socket.
The 

fuse bracket is

integrated in the socket;
make certain you use

specified replacement

fuses only!

SEND: 

Connect this

jack to the FX

processor’s INPUT jack.

SPEAKER OUTPUTS: 

Output jacks for connecting external bass speaker cabinets (these jacks

are wired 

in parallel). The overall impedance rating is 4 ohms. For instance, you can connect

one 500 watt cabinet with a minimum rating of 4 ohms or two 500 watt cabinets with a
minimum rating of 8 ohms each. If you operate the BASSBASE 400 at a higher impedance
rating, power output will decrease accordingly.

It is very important that you heed the maximum rated handling capacity of any speaker

cabinets you choose to connect, especially if you have borrowed them from someone you
want to remain friends with.

Summary of Contents for Bass Base 400

Page 1: ...BEDIENUNGSANLEITUNG l l 400 WATTS BASSAMPLlFlER MANUAL B A S S T E C H N O L O G Y ...

Page 2: ...SATURATION LED Indicates the preamp is in tube overdrive mode MUTE Switches all of the BASSBASE 400 s outputs except for the TUNER OUT off Use this button for breaks between sets switching instruments or when tuning The RED MUTE LED will illuminate to indicate the amp is muted DI OUT Use this jack to send signals to a mixing console or additional power amp INPUT Connect your bass to this jack CAIN...

Page 3: ...ort circuit in the SPEAKER OUTS or direct current in the output will trigger the circuit breaker TEMP LED Indicates that thermal overload overheating is the reason why the protective circuit has activated e g when the ribbed ventilation duct is obstructed FREQ KHZ LEVEL dB FREQ HZ CUT dB FREQ Use this control to adjust the notch filter s center frequency within a range of 30 to 500 Hz s control ad...

Page 4: ...rocessors expecting an instrument level signal such as stomp boxes C MAINS SOCKET Connect the included power cable Euro norm to this socket The fuse bracket is integrated in the socket make certain you use specified replacement fuses only SEND Connect this jack to the FX processor s INPUT jack SPEAKER OUTPUTS Output jacks for connecting external bass speaker cabinets these jacks are wired in paral...

Page 5: ...perly turn your instrument s volume all the way up and spank the plank hard by slapping or really digging in with your pick For the ideal setting the RED CLIP LED will illuminate briefly on peaks only If the signal is too hot press the 10 dB button to damp it NOTE The RED CLIP LED illuminates to indicate distortion in the BASSBASE 400 preamp caused by a saturated input or incorrect FX processor le...

Page 6: ...can now use the LEVEL control to amplify attenuate selected frequencies as desired Use the same procedure to tune the upper mid frequencies via the FREQ KHZ and LEVEL controls LEVEL to maximum tune FREQ KHZ then adjust LEVEL to amplify attenuate the chosen frequencies This frequency diagram depicts the effects of the VARIMETRIC EQ on the lower midrange As clearly illustrated the boost of a complet...

Page 7: ...CH Adjust the FX loop s level to your FX processor s input level Press the 10 db button for effects devices that are designed for instrument levels If the button is not pushed in the signal remains at standard line level for 19 rackmounted processors Adjust the blend between the original and processed signal via the FX MIX pot located on the front panel Towards DRY more original signal towards WET...

Page 8: ...ate the defect and have the fuse changed by a qualified service technician make sure the replacement fuse bears the proper rating E3 Using a footswitch you are unable to turn off the VARIMETRIC EQ or the FX LOOP The EQ or FX LOOP front panel selector switches were inadvertently left in the ON position Press the appropriate selector switch to disengage the front panel control E4 The sound is thin a...

Page 9: ...SIONS Combo LxHxD Weight Head LxHxD Weight ECC83 12AX7A 50 Hz 15 10 dB active 2 20 kHz 16 12 dB active 80 l000 Hz 12 16 dB active 500Hz 15 kHz 12 16 dB active 30 500 Hz 16dB 0 dB 10 dB 470 kOhms switchable 0 dB 10 d B 47 kOhms switchable 0 db 10 dB 220 Ohms 0 dB 220 Ohms 10 dB 200 Ohms balanced 10 dB O dB 4 7 kOhms 396 Watts RMS into 4 Ohms 1 THD 260 Watts RMS into 8 Ohms 1 THD 612 Watts Dynaclip ...

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