3
USING THE DYNAMIC BASS SYSTEM
Make all the external connections such as the send (26) and return (27) to and from your effects processor,
the output to your guitar tuner (25) and connection to the footswitch for the graphic EQ (20) if required.
If you are extending the system by linking to a further D.B.S. amplifier, take a screened guitar cable from
the link-out jack (22) of the controlling amplifier to the link-in jack (21) of the slave system.
Check that the Speakon connectors are fully located, twisted and locked at both the cabinet and amplifier
ends (see diagram) before switching on your D.B.S amplifier. Note: (When systems are linked together
always switch on the master system before switching on the slave system and vice versa on switching off).
Select the correct input to match your bass.
Generally speaking the low-sensitivity input (2) suits bass guitars of high output levels e.g. active basses
and the high sensitivity input (1) suits lower output instruments (passive basses). As there are so many
different output levels from the many types of instrument available to you, you should try both before
making the decision.
Set the primary EQ to flat and make sure that the deep (6), bright (5), compression (10) and graphic EQ
switches (14) and the master volume control (15) are all off.
By turning the Gain control (3) until the peak LED lights occasionally you will be setting the optimum
level of input gain. Too little means that the amp is working inefficiently, too much can cause unwanted
distortion.
The gain control (3) may need to be backed off accordingly if you boost the EQ, especially in the lower
frequencies.
Note: (Even with the gain control off you will still get a sound through the speakers on turning up the
master volume).
Turn up the master volume to the desired level and set-up your basic sound using the primary EQ controls
(7&8) combined with the deep and bright switches (5 & 6). The character of the sound can be changed
using the pre-amp blend control (4) from the brighter more percussive solid state tone to the warmer more
compressed vintage valve tone.
When using the built in compressor the compression threshold is set using the gain control (3) and the
amount of compression by the depth control (11).
The clean power of the D.B.S is so dynamic that you may not need any further EQ although any amount
of fine tuning of tone can take place using the 9 band graphic equaliser. Alternatively you can set-up an
entirely different sound on the graphic then use the footswitch to switch between the two. This incredible
clarity also means that you won’t have to compromise your EQ settings as the volume increases , as is often
the case with normal bass amplification.
SPEAKON CONNECTORS
1.Ensure locking ring (A) is rotated fully Anti-clockwise. Insert Speakon connector into socket and align
key ways.
2. Rotate body of the connector (B) fully Clock-wise.
3. Rotate locking ring (A) Clock-wise to it's full extent.
Note: (Reverse above procedure to remove connector).
MOUNTING THE 7400 IN A RACK
Though your 7400 Dynamic Bass System amplifier comes supplied in a purpose built 3U sleeve, it is also
rack mountable. As with all rack mount products of substantial weight, we strongly recommend that you
ensure that it is adequately supported using suitable brackets at the rear as well as the front.
(See Rear Panel diagram for positions of fixing bolts).
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