Below is the picture of the side of my amp. What I am wondering is, is the sensitivity controller a varaible capacitor? I tried measuring it for resistance but it came up with 0.00 as the reading(turned it to both extreme ends to test).
To make a long story short, im sodlering all the wires to the bottom of the amp directly to the circuitboard(except the power and ground wires) and the way my amp will be sitting, i wanted to see if i could buy the same value(as in ohms, or farads) device as is on the board now so i can make an external controller for that so i can mount it by the side of the amp(the way i will have it, it will be a BIG pain if i wanted to change those settings.
Also, can anyone explain to me whats the difference of the sensitivity controller compared to a 'gain' controller.
To make a long story short, im sodlering all the wires to the bottom of the amp directly to the circuitboard(except the power and ground wires) and the way my amp will be sitting, i wanted to see if i could buy the same value(as in ohms, or farads) device as is on the board now so i can make an external controller for that so i can mount it by the side of the amp(the way i will have it, it will be a BIG pain if i wanted to change those settings.
An externally hosted image should be here but it was not working when we last tested it.
Also, can anyone explain to me whats the difference of the sensitivity controller compared to a 'gain' controller.
The sensitivity controller is simply a potentiometer (resistor with moveable wiper/tap), which controls how much the input signal is attenuated and passed to the amp itself. The reason you can't measure DC input resistance is because there is a DC blocking capacitor on the input of the pot, which is perfectly normal and good design.
silentblackhat said:
Let me try some definitions:
Sensitivity: defined by the input signal voltage level that produces the maximum signal level at the output.
Gain: as it says, defines the gain for an amp to have a particular sensitivity. As far as I know, it is a fixed parameter for most amps (but not for yours !). For example, for an amp with feedback, it is generally related to the feedback factor.
VOlume Control: generally a resistive network (may be a potentiometer, a stepped attenuator) or a dedicated IC to attenuate de input signal, feeding the amp with a portion of your original input signal. No change in amp gain/sensitivity.
I don't know how gain is defined in your amp (wihthout schematics I can't try to say) but this "Sensitivity Setting" changes the gain of your amp, somehow. If this amp has global negative feedback, I would say this control changes feedback factor.
More experienced posters can correct me if I am wrong.
Best regards,
João Pedro
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.