#1
Does having less resistance mean louder?  
For instance would a 15watt amp going into a 8ohm cabinet be louder than the same amp going into a 16ohm cabinet?  
#2
Gosss You halve the wattage every time you 2x the ohm load. So if the power amp puts out 15w @ 8 ohms, an 8 ohm speaker sees 15w. With the same power amp, a 16 ohm speaker will see 7.5w.

However, for SS equipment they will typically list a minimum load rating. So if it lists 15w 8ohm minimum load, you cannot run a 4ohm cabinet to try to get 30w. You can keep going up in resistance, though, so if you need to drop down the wattage you will be okay. But never try to get more out of it by using a less-resistive load than what the amp says.

For tube equipment, run it at exactly the same total resistance as it requires or else.there are exceptions but i don't know them
Last edited by Will Lane at Mar 27, 2017,
#3
Quote by Gosss
Does having less resistance mean louder?  
For instance would a 15watt amp going into a 8ohm cabinet be louder than the same amp going into a 16ohm cabinet?   

Yes, if the amp was rated at 15W into 8ohms.

If the amp was rated at 15W into 16ohms it should not be connected to an 8ohm load.
Last edited by PSimonR at Mar 27, 2017,
#4
Match the speaker load to the amp >   

Speaker/amp mismatch >   
"Your sound is in your hands as much as anything. It's the way you pick, and the way you hold the guitar, more than it is the amp or the guitar you use." -- Stevie Ray Vaughan

"Anybody can play. The note is only 20 percent. The attitude of the motherfucker who plays it is 80 percent." -- Miles Davis

Guthrie on tone: https://www.youtube.com/watch?v=zmohdG9lLqY
#5
What's the amp? It varies depending on whether it's a solid state or tube amp.
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Quote by K33nbl4d3
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#6
Quote by Dave_Mc
What's the amp? It varies depending on whether it's a solid state or tube amp.

It's an EVH 5150 III LBX which has a selector switch for 4ohm, 8ohm and 16ohm speakers.  
#7
Quote by Gosss
It's an EVH 5150 III LBX which has a selector switch for 4ohm, 8ohm and 16ohm speakers.  

In which case, provided you select the same ohms as the speaker the volume will be the same. (Given the same make and model of speaker - just different impedance) (oh, and in the same cabinet too) (and provided the speaker lead is not too long or too thin)
Last edited by PSimonR at Mar 27, 2017,
#8
^ Yep agreed.

And you'll lose volume (and possibly damage the amp) by not matching up the impedances.
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Quote by K33nbl4d3
I'll have to put the Classic T models on my to-try list. Shame the finish options there are Anachronism Gold, Nuclear Waste and Aged Clown, because in principle the plaintop is right up my alley.

Quote by K33nbl4d3
Presumably because the CCF (Combined Corksniffing Forces) of MLP and Gibson forums would rise up against them, plunging the land into war.

Quote by T00DEEPBLUE
Et tu, br00tz?
#10
With tube amps there should not be any difference as long as the impedance matches with the amp setting. With solid states the wattage drops when you go above the amplifiers minimum impedance.

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