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11. If you’re using a professional external signal processor that has Line-level inputs and outputs, turn your Hydrive Combo amp off momentarily and then connect a standard audio cable between the rear panel Preamp Out jack and your effects processor input and another standard audio cable between your effects processor output and the Amp In jack. (If required, multiple effects processors can be daisy-chained together, output to input). Then turn the Hydrive Combos amp back on and play your bass while adjusting the controls of your effects processor(s). For best results, set both the input and output gain of the connected effects processor(s) to 0 dB (unity gain), so that there is no increase or decrease in level whether the effects are switched in or out. 10 Setting Up and Using Your Hartke Hydrive Combo Bass Amplifier Setting Up and Using Your Hartke Hydrive Combo Bass Amplifier If you need to connect the Hydrive Combo to a PA system or a recording mixing console, connect a cable between the rear-panel Direct Out and a Line-level input on the mixer. (See E on page 8 in this manual for more information on the use of the Hydrive Combo Direct Out). The signal that is sent from the Hydrive’s Direct Output can be configured as directly off the input or after the pre-amp by using the PRE / POST switch. If PRE is selected, the signal sent to the direct output is directly from the Input. If POST is selected, the signal that’s sent to the direct output includes the Level, Compression, Shape and Overdrive plus the Bass, Treble and Equalizer. If you experience a ground loop hum when connecting the Hydrive combo to a PA system, try setting the Ground Lift switch to the Lift position. 13. The Aux Input can be used with a portable CD player, cassette, mini disk or MP3 player to jam with pre-recorded tracks or learn a riff from a favorite tune. In fact, you can plug any line level signal into the CD input including the signal from a keyboard or drum machine. Connect the CD player or other Line level device to the CD Input using standard RCA cable. You will want to use the volume control on the CD player or other Line level device to set the balance between the track and your bass. So, start with the volume control all the way down and slowly raise it until you reach a good balance with your bass. 14. The Hartke Hydrive combo has a footswitch jack located on the rear chassis panel. Connect the optional Hartke FS2 dual-button footswitch to the rear panel Footswitch jack for increased control when performing on stage. Switch #1 allows you to switch between the Bass Attack Overdrive on and off. Switch #2 on the FS2 will control the on and off for the Shape control. If you encounter difficulty with any aspect of setting up or using your Hartke Hydrive bass combo amplifier, you can call Hartke Technical Support (1-800372- 6766) between 9 AM and 5 PM EST, or contact your local distributor if you purchased your Hydrive combo outside the United States. 11 The Effect of the Shape Control The Hydrive's unique Shape control enables the sound of your bass instrument to be enhanced at the touch of a button. When the front panel Shape switch is pressed in, a special equalization curve is activated that is designed to improve the sound of most electric bass instruments. This curve provides moderate boost at certain frequency areas and deep attenuation at other frequency areas. Furthermore, the front panel Shape control adds a filter to a selected frequency area within the Shape curve. As the Shape knob is turned clockwise, the filter is imposed on higher frequency areas; as it is turned counterclockwise, the filter is imposed on lower frequency areas. At the fully clockwise position, the filter is applied to the 1 kHz frequency area; at the fully counterclockwise position, the filter is applied to the 80 Hz frequency area. Even when Shape is activated, the front-panel EQ controls remain operational. When all EQ controls are set to their “0” (flat) position, they add no boost or attenuation to the preset Shape curve. However, when any EQ controls are moved from their (“0”) position, their boost or attenuation effect is superimposed upon the preset Shape curve. In this way, you can customize the sound of the Hybrid combo further still to complement your particular bass instrument and playing style. Note that, when the Shape switch is out, the EQ controls operate on the “flat” signal coming from your bass (that is, there is no preset equalization curve imposed). For expanded control on stage, you can use the optional FS2 footswitch to select the Shape on or off. 12 1212 13 Using the Bass Attack Overdrive The Hydrive combos feature Hartke’s Bass Attack Overdrive circuit allowing you to add a little tube type overdrive, some edgy dirt or all out fuzz. The Bass Attack Overdrive operates with three controls; the first is Harmonics, which is used to set the amount of overdrive. Next is BRITE, which is a high-frequency tone control inserted befo...

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