Roland -20dB input jacks - what's the deal?
Their CB-30 (Cube 30 Bass) amp has a -20dB input jack.
The CB-60 and/or the CB-100 has a -10dB input jack with a button that'll make it -20dB.
They do have Gain and Volume knobs, but why would they make them with such a big cut? For active basses?
yeah it just cuts the input sensitivity by 10 or 20 dB.
you're right, it could be for a hot active bass, or if you're going into an effects unit before the amp that has a hot output.
It cuts the volume of the amp quite a bit too.
The CB-30 with Gain at 10:00 (more distorts/farts) and Volume dimed, it's noticeably quieter than a Minx (with Faital 10FE200) with the Volume at 9:30.
I now see why I've read often that the CB-30 is only good for a practice amp. It sounds great, but has low volume thanks to the -20dB input jack.
So don't use the -20db input
If there is no Amp in or effects return and you're running some other preamp or device before it.
knob positions amp to amp
Are meaningless. Looks like you have to set the gain and volume where it sounds best--- volume from any practice amp has it's limits.
I have a Line 6 studio 10 for practice. Works excellent.for gigs without a drummer and PA support. Add a drummer to the mix and I run out of headroom and air movement quickly with the 75watts and sealed 10" box.
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