Does This Pedal Exist ?

[Electric I]

Is there a pedal out there that effectively gives you an effects loop that you can insert between amp & speaker ?

I know the Bad Cat Unleash has this feature, but it's main thing of attenuation/amplification is redundant.

Does such a thing exist ?

 

[darkinners]

Might not be in pedal form but such a thing exist.

Google "Amp load box"