A Power Meter Would Go Where?

[bhjazz]

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.

[luvdunhill]

Check out the L'Amp articles on DIYA for the 'sweet spot meter'.

[wink]

It would go between the positive out and the load.

Need 2 for stereo.

[luvdunhill]

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.

[bhjazz]

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, 2012 by bhjazz

[kevin gilmore]

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, 2012 by kevin gilmore