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Dummy speaker load

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Tim Connolly
Posted on Friday, December 23, 2005 - 10:14 am:   

Hi,

What do you folks use for a speaker dummy load when bench testing an amp?
Or do you have a dedicated test speaker setup?
Steve Kennedy (admin)
Username: admin

Registered: 03-2002
Posted on Friday, December 23, 2005 - 11:45 am:   

I use a dual 100 watt 8-ohm load box I bought from MCM Electronics (Tenma brand) a few years ago. They are on close-out for $45 now.

Here is the link:

Tenma Audio Load

It is essentially a metal cabinet with cooling holes and two sets of binding posts (non-standard 1 inch spaced unfortunately) on the front panel. The resistors are 8-ohm wirewound 100 watt ceramic beasts that can be used as a 100 watt stereo 8-ohm load or your can create a 200 watt 4-ohm load or a 100 watt 16 ohm load by connecting the binding posts in parallel or series.

Since the resistors are spiral wound you will get some inductance (which is a little more like a loudspeaker coil) but this is an essentially non-inductive test load.

Steve



(Message edited by admin on December 23, 2005)
Tim Connolly
Posted on Monday, January 02, 2006 - 03:28 pm:   

Thanks Steve! Just ordered one!