This 'High Definition' bass head is completely based on Solid State technique. The HD heads have become favorites among studio session players, offering an exceptionally good and thought-out EQ that has been tuned-in carefully to cover all the frequency ranges that you need to optimize your tone. With a 360 W RMS output it offers enough power for most of us, and is slightly smaller and lighter in size than the TD head.
The basic layout of the control panel (from left to right) feature a Character filter, which is a quick fix to a decent sound by offering a mid-scooped overall tone. Then the input Gain control that should be set so it flickers when you play your instrument hard (which is important with all EBS heads). The Filter Active button to activate the EQ filters, then the shelving Bass filter, the advanced Middle filter where you pick the frequency range you’d like to adjust with the right control and cut or boost in that range with the left control. Don’t forget the clever "Notch" function. When the Cut/Boost control is set to "Notch" you can identify and scoop out frequencies causing unwanted feedback with the Frequency control. It is very useful in rumbling venues that may pick up certain frequencies, or when you get feedback from an instrument, such as an upright bass. Next control is the shelving Treble filter and then the unique Bright filter, which is almost like a volume control for the cabinet’s tweeter. When turned up it opens up the sound and makes the tone huge and alive. The Drive offers that extra grit that makes the amp growl as much as you want. From just a smooth boost to growling distortion.
The input jack has a special feature since, if used with a stereo cable, it offers 9V DC Phantom Power output, that can be used to power a single 9V DC EBS pedal or an active bass.
Sexy back. If you take a look at the back panel, you’ll find all the extras you cannot be without! There’s the Effects Loop, featuring a Mix level control that lets you blend in all effects hooked up through the loop with your sound, from zero to a hundred percent. Effect Return also offers the same Phantom Power function that you find on the Input jack at the front. There is a Tuner output, for connecting a tuner rack unit easily. You have a Line out, in case you need the power from another amp to drive a second pair of cabinets, and finally the Filter Remote Inputs to connect the RM-4 footswitch that lets you switch on and off Character, Filter Bypass, Drive and Mute from front of stage.