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3. R500 PRODUCT OVERVIEW
The Markbass R500 is a high-quality bass amplifier with a tube preamp and an analog power amp, which delivers 500W of power into
a 4 ohm cabinet, or 300W into an 8 ohm cabinet.
3.1 R500 FRONT PANEL
INPUT
The input jack can be used for both passive and active basses.
GAIN and MASTER
There are two knobs on the front panel of the R500 that control the volume of your bass. The GAIN (2) control determines how much signal is passed through the preamp stage
of the unit, which includes the preamp tube, the equalization circuits and the effects loop. The MASTER (10) volume regulates how much output comes out of the power amp
into your cabinet. If playing through the amp causes the blue ‘CLIP’ (3) light to turn on at all, you should turn down the GAIN (2) if you want to avoid distortion.
When you first plug into the amp, start with the GAIN (2) and MASTER (10) controls set at their lowest levels, in other words turned all the way counter-clockwise. Then, turn
your instrument’s volume up to its full level and play as hard as you do in your most aggressive moments, and turn up the GAIN (2) control until the blue light starts illuminating.
Next, back off on the GAIN (2) just enough so that the light stays off as you play. This method will result in the optimal gain setting for the bass you’re playing. Different basses
have different output levels, mostly depending on their pickups and in the case of active basses, the instrument’s onboard preamp and EQ settings.
Once you’ve set the GAIN (2) level, use your MASTER (10) knob to control the volume of your bass. If you wish to play with a distorted sound, turn up the GAIN (2) until you
find the desired amount of distortion, then use the MASTER (10) to control your volume.
LINE OUT
This LINE OUT (9) knob controls the volume level of the rear XLR LINE OUT (21), which is connected to the mixing console in live or studio situations.
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