Pow_22

Yup, not in series with the cabinet, but can be connected in parallel or daisy chained with the cabinet. There's several on the market and, even Darkglass' Element pedal can be used as one (up to 100W) - meaning that you can even install a cabinet emulation (along with EQ and a whole host of other parameters) post amp to then feed off to your recording device or PA system. It's not a dummy load though, so this one will still need a cabinet attached. Dummy loads do exist too, I reviewed the Sequis Element: https://www.bassgearmag.com/bassic-review-sequis-motherload-elemental/   and Darkglass Element a while back: 

I've used a Palmer "The Junction" PDI 09 for years for this and have had good results. Really does sound like a mic'd amp IMO and one gets the power tube character in addition the the preamp tone. Solid piece and I like that it's passive. It does have several attenuation settings and ground lift, if needed. As with the Darkglass (have not used it but would like to try it) it's limited to 100w (I've used with '64 Dynacord Bass-King and Ashdown Little Stubby). As Dood says, it still has to be used with a cab as it does not have power soak/dummy load function (Palmer and many others make those).

I've used one of these:

https://www.canford.co.uk/Products/21250/20-031_EMO-E520-DI-BOX-Passive-1-channel-with-earth-lift

Rock solid construction, but absolutely no frills, amp sims or anything