jc986":3lrwdfvy said:
Sorry to bump an old(ish) thread, but I just bought an older FatBottom cab. It doesn't have the 4 ohm mono option. Anyone know what would need to be done to wire the cab to be like the current production ones? Love the way it sounds in 16ohm, just curious how it would sound at 4ohm.
Not all amps react the same...but usually more midrange and less treble and bass.
It's a lot easier to adjust the tone knobs on the amp than rewiring.
"When you change the impedance rating of the speaker, you also change the inductance of the coil which changes the resonant frequency among other things. So if you have 2 identical amps and 2 identical cabs - one cab loaded with 8 ohm speakers and amp set to 8 next to one loaded with 16 ohm speakers and amp set to 16, they will sound noticeably different. The 16 ohm rig will usually sound brighter and deeper"
"What I was referring to was the construction of the speaker itself. Taking a 16 ohm vintage 30 for example, if you simply decrease the speaker voice coil turns to make it an 8 ohm speaker, the chances that it would sound the same in all other respects are slim. By playing with other factors such as wire gauge and doping, they can me made to sound similar, but not identical.
So, it's important to know that when you are comparing cabs. Comparing two identical cabs operated by identical amplifiers, but one cab loaded with 8 ohm V30s and the amp set to 8 ohms vs one cab loaded with 16 ohm V30s and the amp set to 16 ohms, you are going to hear a pronounced difference in sound and performance. The differences will be partly the difference in electrical characteristics of the speakers and partly the resulting change in reactance of the amplifier.
Even so, I think you'll find that two 8 ohm speakers wired in series for a 16 ohm load will produce a deeper wider sound."
~ Steven Fryette
