Using correct Impedence when switching power modes?

[greendy123]

I have marshall amp with pentode and triode switch, 16 and 8 ohms selection switch. From what I have read triode halves the wattage output. One user on the forum said that is also halves the impedence used.

An example would be in triode, on the 16 ohm setting the impedance would be 8 ohms instead of, 16 ohms on pentode.

[Robert S.]

Did you get a manual?

What model Marshall?

[greendy123]

I have marshall 2100 slx 100w. Heres a link to a similar amp of the same series but of a different model number. http://www.marshallamps.com/download...4100%20Hbk.pdf

[Zerberus]

With Marshalls and Mesas the switching is generally done internally when flicking "Triode /pentode or "Hi-power/Lo-Power" switches... Usually no "uuser brain recalibration" is necessary

[greendy123]

With Marshalls and Mesas the switching is generally done internally when flicking "Triode /pentode or "Hi-power/Lo-Power" switches... Usually no "uuser brain recalibration" is necessary

Oh, so you mean that the impedances stay the same and only difference if the power output.