attenuation decibels to watts?

[RCM 800]

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.

 

[ricksdisconnected]

.

 

[JohnH]

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.

 

[ricksdisconnected]

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.

if anybody has the answer on its ole john here.

 

[Salty Rose]

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

Edit- here’s what it sounded like-

 

[RCM 800]

Thanks alot man!

 

[RCM 800]

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!

 

[Pete Farrington]

Bear in mind 50W is the clean rated power. Overdriven power may be up to double that, expect around 80-90W with a good pair of EL34.