Using an Extension Cabinet with a Combo Amp

[UKPete24]

My combo has an external speaker jack, and I’m thinking of adding a 1x12 extension cab for bigger gigs. Does this noticeably improve fullness, or is it mostly about volume?

[GearNerd]

I run my combo with an extension cab all the time, and the biggest difference I notice is the way the sound spreads on stage.
Instead of a narrow beam coming from one speaker, the wider footprint makes it easier to hear yourself and helps the band balance without turning up as much.

[StudioPro]

Just make sure the impedance matches what your amp expects when running both speakers.

[MetalPlayer]

It can add both volume and low-end, especially if the extra cab has a different speaker that complements the combo.