The super-compact TubePre V2 (at just 1/3 rack width unit, and a matching low price) is a great way to get some valve sound in your signal chain.
TubePre V2 rear panel has separate, unbalanced, ¼” instrument and balanced, XLR mic inputs, plus unbalanced ¼” and balanced XLR line outputs.
On the front panel, you’ll find high-pass filter, phantom power for condenser mics, phase reverse switch, and a backlit VU meter.
Drive the valve as gently, or hard as you want. The drive knob goes from 0-100% to allow you the most feathery of tickles to the 12AX7, or a full sledgehammer.
You can use TubePreV2 as an instrument DI box.