Summing Mixer for UAD Apollo 8P – X6 Thunderbolt 3
Analog Summing Mixer for Your DAW Interface Synth – Keyboard – Desktop & Rackmount Options
Unlock the Full Potential of Your UAD Apollo, RME, Focusrote, Audient, Steinberg, behringer Sound card Interface or other
Looking to get the most out of your UAD Apollo interface?
This analog summing box is custom-built specifically for your setup – perfectly matched to your studio gear, workflow, and sound goals. Unlike generic solutions, this summing mixer is tailored to your Apollo’s Unison preamps, giving you more headroom, analog warmth, and a truly professional stereo image.
Compatible Interfaces
Ask for versions made for:
MOTU · Focusrite · PreSonus · Prism · Roland · Tascam US · RME · Antelope Orion or Other (let me know yours) Also available for Apollo x8 and Twin systems – in desktop or rackmount formats.
Why Choose Analog Summing Over In-the-Box (ITB) Mixing?
1. No Mix Collapse
Preserve clarity and punch — ITB mixes often flatten on export.
2. Superior Instrument Separation
Achieve a deep, wide 3D stereo image with analog summing.
3. Enhance Your Apollo Output
Drive the analog summing inputs from your Apollo for subtle harmonic warmth and pleasing saturation.
4. Add Final Color and Character
Use your Apollo Unison preamps to shape the final tone with true analog flavor.
Analog Summing Box Mixer designed for Apollo x6 Thunderbolt
ASK FOR: Motu – Focusrite – Presonus – Prism – Roland – Tascam US – RME
Desktop and Rackmount – for Apollo x8 and Twin – below
ANALOG SUMMING BENEFITS OVER DIGITAL ITB PRINT FILE
1. Your mix never collapse (ITB file print does)
2. Exceptional Instrument Separation Deep wide 3D panorama sound
3. Boost UAD Apollo (DAW) outputs, get a pleasing, subtle analog harmonic distortion in the summing mixer
4. Add various final color – sound character on your Apollo Unison Preamp Emulation main rec






1U Rack 8×4 Summing Mixer TRS/TRS designed for UAD Apollo 6x x6 (-20dB) Unison Preamps or Motu – Focusrite – Presonus – Prism – Roland – Tascam US – RME Firewire – USB Antelope Orion
Description – Specs [read more]
- Input: 8 ch TRS 1/4″ Balanced
- Output: 2xStereo /4 x TRS Balanced L/R (common)
- 1 x Stereo to 2 Mono on 1/2 stereo input (you can ask for more) read more…
- DIR OUT or SUM mode select monitoring switch for 7/8 summing input read more…
- *with +2 direct input on the summing mixer for Apollo monitor out, this you can use as regular monitor (stright through summing) or instrument input with SUM or Monitor switch
- **DIR SWITCH: You don’t have to unplug In “everyday” work DA out 1/2 (or monitor out) routed directly to the summing mixer (pre production, programming, editing etc) just switch to OUT/DIR mode and you have the stright Input to Output routing.
- *Equivalent signal on both stereo outputs, 1-8 inputs remains active, you need to mute them from the DAW.
- **If you need exclusive monitoring please ask the Total Bypass feature…
- Unique Name engrave (let me know)
- Build time 12 working weekdays (estimated)
- see signal routing diagram for Universal Audio Apollo x8 with passive summing mixer
- STM = Stereo to Mono: read Documentation or see on Youtube
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As an audio engineer, I’m always on the lookout for gear that can improve the sound quality of my recordings. Recently, I had the pleasure of testing out the custom passive summing mixer designed for Apollo x8 – x8p by VintageMaker, and I must say I was blown away by the results.
The mixer features 10 inputs and 4 outputs, allowing me to sum multiple channels of audio from my Apollo interface into a stereo mix. The balanced analog signal path provides a warm and natural sound, with excellent clarity and depth.
One of the things I love about this mixer is its simplicity. It’s a passive design, which means there are no active components to introduce noise or coloration. It simply sums the signals together, allowing me to achieve a more cohesive and musical sound.
The build quality of the mixer is excellent, with a sturdy metal chassis and high-quality connectors that feel solid and reliable. The unit is also compact and portable, making it easy to take with me on location recordings or to use in a home studio setup.
Overall, I would highly recommend the custom passive summing mixer designed for Apollo x8 – x8p by VintageMaker to any audio engineer looking to improve the sound quality of their recordings. It’s a fantastic piece of gear that delivers excellent results and is built to last.
















How to connect a summing mixer to the DAW? YOUTUBE
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https://youtu.be/QbHYnWHbZw4
Bought a Little One 16 TRS and tried it out over the last few days. I am very happy with the results so far on my drum mixes. I am using it Apollo X6 sometimes with Harrison Mixbus, BLA modified MOTU interfaces, and BLA Auteur Preamp. This combo has really improved my mixes. I am another satisfied customer of Vintagemaker Paul! I’ll be placing my order for a powered summing mixer from him in the future that is for sure!
After hooking up the summing device to my UAD Apollo, i was really impressed by the warmth of the lower frequencies and how separated and touchable warm the full roughmix got. I didn´t touch anything, just send them out!!!
I recorded this testrun as stereofile and bounced it out of the daw & compared it on some different systems. Another mix is done in the meanwhile on 2 Mono-Outs and 2 Stereo-Outs, the transpareny of the sound goes now even deeper into soundspectre & the stereo panorama is more defined.
Compared to the ITB-Mix, I get the impression it gets more audible stereo positions. Especially when you think of full pan positions or just right out of the middle. They are now represented clearly defined, not just somewhere…