They are 4~4ohm speakers.It depends on the speaker impedance itself.
I don't think it's possible with that config... If I'm remembering my Ohm's Law correctly.They are 4~4ohm speakers.
@Bman - did you update your post title? I don't remember seeing 16ohm in the title when I replied.
You know, I don't recall but a 16ohm would work too. I believe I can run an 8ohm output into a 16ohm cab, can I not? Also, I believe if I leave the combo speaker plugged in (it's a 8ohm Creamback) the output to the extension becomes a 16ohm output. I'll verify with the DSL40's manual, but I thought that to be the case.
So another question or observation maybe? Will a 16ohm signal be quieter than a 4ohm or more importantly will there be a difference in 'tone'? The cab is a cheap cab but sounds really good when I paired with my old '73 Marshall 50 watt. The inefficient speakers must have some mojo working.
Edit: A quick search and the answers vary on tone. It's in the ears and may 'feel' different. Since this is a setup that I've never experienced (Axe3,DSL40 powr section, cab) I won't have a clue and only know what I hear. Thanks for the quick responses. Unfortunately, it'll be a quick experiment because I don't want to piss of the neighbors. I'm totally fine with my FRFR setup. I just miss the oomph and want to scratch that itch.
I found this article from H & K:Generally most tube amps can tolerate a slight mismatch (one rating higher or lower), but it depends on how robust the amp and output transformer are. If you are going to mismatch, plugging into a lower than expected load is typically "safer". The lower load means more current can flow in the secondary and speaker coil, but the rest of the amp circuit can only supply so much power, so it is sort of self limiting to a degree.
Higher than expected load means less current can flow through the speaker than expected and that mismatch causes fly-back voltage on the primary side of the output transformer. If it's bad enough, it can cause the transformer windings to arc and burn out the tranny. That's why having no speaker plugged in is so bad. That's essentially an infinite load and no secondary current can flow. All that power has to go somewhere, so it basically bounces back into the amp circuit and smoke and expensive repair bills result.
Safest bet and best performance is always with a proper impedance match.
Crap. So I had it backwards?The 4x12 looks to be wired in series-parallel for a total load of 4 ohms. Are those neo speakers? The magnets are tiny.
If you want 16 ohms you'll need to wire them in full series where the + of the jack connects to the + of the first speaker and the - of the first speaker goes the to the + of the next speaker and so one until the - of the last speaker connects to the - of the jack.
There's no way to wire four 4 ohm speakers to get an 8 ohm total load.
Which version of the DSL40 combo do you have? The output options have changed over the years. Old ones had 3 speaker jacks while the new ones have 5.