How to track and re-amp guitar with the Vintage Direct and Replay Box

What is re-amping?

Re-amping is the process of re-recording an audio signal (typically a digital signal from a DAW) by routing it to a real hardware amplifier, which is then typically recorded with a microphone. Before re-amping, it was commonplace to lose a lot of hours in the studio fussing with amplifier settings and mic positioning to capture the desired amp tone at the source. 

Re-amping allows you to spend more of your studio time tracking the instrument first to dial in the amp tone, effects, and mic placement long after the guitarist has left the studio.

Re-amping requires four things:

• A clean DI-recorded signal (preferably captured by the Vintage Direct, of course)

• A re-amp device like the Replay Box, which converts the line-level signal output from your audio interface into a high-impedance signal that a guitar amplifier is intended to work with

• An amp, pedal or guitar processor like Line 6, Fractal, Kemper, etc. 

• A mic or amp/processor with mic/line output

Re-amping is one of the most powerful tools in a modern studio’s arsenal, bridging the gap between digital flexibility and analog tone.

Step 1: Get a clean DI capture of the performance.

Using a DI box like the Vintage Direct lets you record a clean, direct signal from your guitar before any amplification or effects, preserving the pure tone of your instrument. You can capture a perfect performance without committing to an amp sound, pedal chain, or mic placement.

First, connect your electric guitar to the input of the United Vintage Direct. From the DI’s balanced XLR output, send the signal to your audio interface or preamp—this is the line that will be recorded in your DAW.

The Vintage Direct ensures optimal impedance matching and level balance, so your guitar’s tone remains full and detailed, even over long cable runs. Optionally, use the Thru output of the DI to send a signal to your guitar amplifier. This allows you to record both the clean direct signal and the mic’d amp signal at the same time if desired, preserving a safety copy of the performance to revisit later.

Step 2: prepare your DAW

Inside your DAW, create one track for the DI signal and another for the amp or mic’d signal (if you’re recording one). Label them clearly so you can recall which is which when you return to re-amp. For the DI track, keep the signal path clean. Use no amp simulations, EQ, or effects so that it remains a true representation of the raw instrument. This dry track will serve as the source for re-amping later. Once recorded, you can mute or archive the DI track until it’s time to send it back out through the Replay Box.

Step 3: Set up the Replay Box

When you’re ready to re-amp, route the DI track’s output in your DAW to one of your audio interface’s available line outputs; connect this physical output to the input of the Replay Box. Replay Box is designed to reverse the impedance and level of the DAW’s line signal, converting it back to the high-impedance, instrument-level signal your amplifier expects. From the Replay Box’s output, connect a standard guitar cable into your amp’s input. This setup effectively tricks your amplifier into thinking it’s being played by a live guitar.

Step 4: Playback, record, tweak, experiment

Set your amp and mic up as you normally would, then hit play in your DAW. The recorded performance will play through the amp in real time, allowing you to capture a new mic’d tone as if the player were performing live. You can adjust mic placement, amp gain, pedals, or even swap amps entirely; all without needing to re-record the original performance. This approach makes re-amping a powerful tool for tonal experimentation and mix flexibility, letting you sculpt the sound that best fits the production.

That’s all there is to it! Tweak the amp settings and mic placement during playback to find the tone that best serves the song. Once you find it, simply play back all of the DI tracks and re-record the amp in real time. Note that the Replay Box includes a harmonic color option to add a little bit of tone color to the signal entering the amp. Totally optional.

Pro tip: We recommend using as short of a cable as possible to connect the Replay Box to an amplifier. The connection between playback source (interface / tape machine / etc) can be as long as needed. This ensures the highest quality unbalanced instrument signal into the amplifier.

The Replay Box is exceptionally well shielded, meaning that it will not pickup additional noise when placed on top of an amplifier — even when using digital amplifiers!

Beyond guitars

Creative engineers often take re-amping beyond guitar tracks. For example, sending a snare drum track through the Replay Box and into a guitar amp or PA speaker can add grit, harmonic distortion, and natural room tone; you can even put a speaker on the actual snare drum itself to re-activate the snares.

Experiment! Try miking the amp with a blend of close and ambient microphones, to capture a re-amped snare layer that adds depth and texture to a mix.  

You can also re-amp virtual instruments. Sending a VST synth track through the Replay Box and into a genuine amp adds real-world saturation, air, and unpredictability—qualities often missing from oft-sterile software instruments. Optionally, blend the re-amped signal with the original for a mix that combines precision with real-world warmth.

Other creative re-amping ideas include running vocals through rotary speakers or processing drum loops through a bass amp. You can use the Replay Box to integrate any processor that is expecting a high-impedance signal: stompboxes, cassette decks, etc. 

Anything goes. So have fun!