With 660W RMS pure output power, the EBS TD660 bass guitar amp head will always rock the house. It is a Tube/Solid State hybrid bass amp. The tube in the Drive section warms up the sound and adds a nice natural compression and character of a tube amp. The tube can be easily bypassed with the Tube Mode-button, which means if the tube breaks suddenly, you can use the amp safely by just disconnecting it. That gives you the option to run the head completely Solid State whenever you want too. The TD heads are very well-suited for major tours and are the most common EBS amps with backline rental companies.
The basic layout of the control panel (from left to right) features 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 on the TD heads offer extended options, such as the Tube Mode (to connect the tube), and Boost Mode. Boost Mode boosts the whole frequency range when turning up the Drive, adding distortion to the whole spectra. Finally there's the balanced XLR output, that lets you send a perfectly balanced line signal to front of house or in the studio without the need of an external line box. You can choose between post/pre EQ, with our withoutSpeaker Simulation and Ground lift.
The input jack has a special feature, 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.
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.
EBS TD660 Bass Guitar Amplifier Head Features
- Power: 660W (hybrid)
- Tubes: 12AX7 (preamp)
- Single channel
- Controls: 4-band EQ, bright, gain, compression, drive, volume
- Impedance: 8 ohm
- Balanced XRL output
- Phantom power output
- Dimensions: 19" x 14" x 3U (rack space)
- Weight: 27 lb.
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