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post #1 of 8 Old 01-25-2007, 07:39 AM - Thread Starter
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Do you know of any unit I could buy for a reasonable price that could give my a good idea of how many peak watts my amp is putting out? I'm really curious to know.
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post #2 of 8 Old 01-25-2007, 08:31 AM
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One approximate method is to work backwards using Radio Shack's SPL meter.

From one meter away measure a pink noise signal. You need to know your speaker's efficiency. Only run the L or R channel. Say your speaker puts out 90Db @ 1 meter with one watt in.

Read your SPL:
90Db 1 watt
93 2 watts
96 4 watts
99 8 watts
.
.
.

"But this one goes up to 11"
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post #3 of 8 Old 01-25-2007, 07:00 PM
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Furman VU40 pro audio unit (now discontinued) can read in dB (VU meter) and in watts (power amps) both average and peak readings.
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post #4 of 8 Old 01-25-2007, 09:30 PM
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You would have to measure the output at the speaker terminals, not the input to the amp.

If you are using a test signal (normally into a resistive load), then you might be able to get away with a multimeter.
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post #5 of 8 Old 01-25-2007, 10:44 PM
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I always though it would be cool if they had a small meter that had five-way binding posts on either side. Then you could put it inline between your speaker and amp. This would be great for just getting a general idea of how many watts your speakers need during certain demanding scenes.

It would help a lot with upgrade decisions.
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post #6 of 8 Old 01-26-2007, 08:07 PM
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What you can do is get a Kill A Watt power meter (cheap from Amazon, etc..). That will let you measure the power/current draw off the wall socket. So due to losses in the amp, the actual amp output will be lower than this draw from the wall. That will give you a range.
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post #7 of 8 Old 10-03-2007, 07:18 PM
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Radio Shack used to have some audio power displays; there's a couple on eBay now. The Velleman kit K4307 looks just about ideal: it displays up to 2000 watts/4 ohms, and doesn't need an external power supply. It's mono, and sells for about $40. Just google K4307 and you'll find a bunch of places to buy it. The manual has the schematic, if you wanted to build one from scratch.

For line level display, there's the "American Audio" dB-Display, available new from $60.
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post #8 of 8 Old 10-03-2007, 08:03 PM
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Wow, someone answered a thread from nine months ago

"But this one goes up to 11"
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