Originally Posted by Antoje
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.
How much high frequency response do you need? How will you control the level? I would use a fixed L-Pad, rather than an on/off switch. The amp sees a more stable load and the switch won't need to handle a lot of current because the L-pad will be in series, "absorbing" current. 5A would be fine unless you're pushing an extreme amount of power.
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- http://www.askmehelpdesk.com/attachm...-pie-chart.jpg