attenuation decibels to watts?

RCM 800

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I have a attenuator (2notes catpor 16 ohm) that is supposed to cut 20db on a 100watt amp. Is there a way to figure what the output watts would be for a 50watt amp (2204) if used with this unit? I would like to use it with my 1x12 greenback cab but dont want to smoke the speaker.
 

JohnH

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Yes indeed, that's an easy one. -20db from 100W is 1W, or 0.5 W with a 50W amp. So no problem for any speaker. Expect that to still be surprisingly loud sounding for home use if at max.
 

Salty Rose

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I’ve done it with a 1987x, PB100, and a single G12M25 in a 1912 cab. Couldn’t attenuate too much (prolly 3 or 6 db), because my volume was already somewhat limited by the little cab. Not sure I would make it a regular thing. I was surprised the speaker survived the ordeal. It was fun to do tho:rofl:

Edit- here’s what it sounded like-
 

RCM 800

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Yes indeed, that's an easy one. -20db from 100W is 1W, or 0.5 W with a 50W amp. So no problem for any speaker. Expect that to still be surprisingly loud sounding for home use if at max.
Thanks a lot man!
 

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