Single input jack
Looking for someone who's actually worked on the guts of bass amps.
Amp inputs seem to fall into three categories:
For the last type, what are amp manufacturers typically doing with the input impedence? How do they accommodate the disparity between passive and active electronics?
A simple gain knob will usually suffice.
Or a switch to add some attenuation for active instruments.
I believe the gain control on the Eden can be pulled out for -12db.
If it's just a level control, the impedance will be fixed at hi-Z, as passive
instruments require it. Active instruments can drive either hi-Z or lo-Z,
as long as the input gain is correct for the higher signal level.
A switch can also lower the input impedance along with lowering the gain.
It depends entirely on the designer's intentions, and the application that the amp is designed for.
Gain and impedance can be related or independent, depending on the design. It's not uncommon for the impedance to remain high regardless of gain, and there's nothing inherently wrong with this as the source impedance dominates anyway in this case.
Piezo's are typically buffered through some sort of preamp, and hence don't need any special impedance either.
Zero issue. At most, an input pad MIGHT be helpful in the unusual case of a massively hot output instrument, active or passive.
A low impedance can always work into a higher impedance. As long as the input impedance is high enough, there is no problem. In fact, you want the input impedance to be at least 10x the source impedance if you can, so it doesn't load it. So - the amps don't really care what kind of pickups you have.
You just have to be sure that the input won't clip from a strong signal by having enough headroom in the circuit or by having a pad or some gain control.
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