Adding tweeter on/off switch, needs ampere/current rating
Hi all! I have a technical question here.
I am adding a tweeter on/off switch on my Trace Elliot GP7SM 250 (80's 250W solidstate combo).
Anyone knows the max current passing there normally? I need to know so I select a switch that is sturdy enough.
P=IE, which means your power needs to be specified. Once that's known the current (I) can be determined. The power is calculated using the impedance and voltage (E).
Here's a useful chart for these calculations-
Thanks for your quick reply, I have a spare 10 A switch i can use.
I did not know the existence of L-pads, but I can interpret wiring schematics and calculate electrical loads: thanks for your time to show me this!
The tweeter is already on the amp, I just want to deactivate it when I use it as a keyboard amplifier or a guitar amplifier. (This is the only amp I have at home for practice, all others are where my band rehearse.) I fear high frequencies caused by highly distorted sounds can degrade the tweeter if used for a long time.
As we are speaking, I just unsoldered the crossover from the circuit and the amp has been doing great since. I just want to have the tweeter back on when I practice bass, since I feel it sounds better.
I believe the formula is 250 watts divided by 120 volts (or 240, depending on where you live). You should be fine with anything over 2.084 amps. I may be wrong...
It seems there is already a L-pad on the crossover, so I would just have to move the SPST switch between the crossover and the Tweeter positive lug to effectively have a switch with no total impedance variation.
Circuits are working at different voltages with the help of transformers.
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