February 29, 201214 yr Quick question and likely an easy one, but it escapes me. If one were to have a power meter on the front of their amp, say, like the D'Agostino Momentum, what would it be connected to? I assume across the power supply...or would it be across the output? Thanks! Gratuitous picture for fun.
February 29, 201214 yr It would go between the positive out and the load. Need 2 for stereo. I'm pretty sure this is incorrect. The meter is a bias meter in the pic, not a VU meter.
February 29, 201214 yr Author The meter is a bias meter in the pic, not a VU meter. Ah. I'm getting it. Depends on what you want to show, then, right? Edit: Found the L'Amp Other Edit: The D'Agostino site makes it actually sound more like a VU: "...Despite its impressive output of 300 watts per channel into 8 ohms, the Momentum draws less than 1 watt of power at idle—or about one fifth of what a typical cell phone charger might require." I dunno! Edited February 29, 201214 yr by bhjazz
March 1, 201214 yr Current d'agostino products are similar to the krell sustaned plateau bias stuff. So the meter is showing the amount of class A bias, as a cpu inside monitors the input signal and calculates the minimum amount of bias to maintain class A operation. At least until the thermal limits kick in. Real Vu meters are logarithmic, not linear. They would be hooked up directly to the output terminals. These days there are fancy ways of doing stuff like this with hall effect detectors on the outputs to measure real current, combine with the voltage, run it all into a cpu and calculate real power. Edited March 1, 201214 yr by kevin gilmore
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now