Passive Stereo Summing Mixer solution without compromises​

 Breathe more life into your digital mixes –  add warmth and analog vibe read more…

“Cool passive summing noiseless, infinite headroom and no power required. The best way to mix outside the computer, enjoy clip free summing and then use the different mic pres of your choice to send your mix back to your DAW. “

You can order different gain reduction mixers as: -10dB, -15dB, -20dB, -25dB or more (let me know about your DAW mic preamp gain range)

Desktop Studio Summing Mixers

4-8x2 D-Sub TRS In - TRS Out

99 € +shipping  (basic setup price)

2x stereo to 4 mono switch

8x2 D-Sub TRS In - TRS XLR Out

149 € +shipping  (basic setup price)

2 x stereo to mono switch TRS D-sub input TRS XLR output

16x2 D-SUB In - TRS XLR Out

209 € +shipping  (basic setup price)


16x2 TRS In - TRS Out

229 € +shipping  (basic setup price)

Passive Summing Mixer - YouTube Video

Summing Mixer with Insert and Monitor control output

Customer review

Just want to share my first impression of Little One 16 passive summing box with 2 x stereo to mono options.

I am just plain knocked.  If your tracking chain is good but mixes sound muddy, boxy, thin and narrow compared to big production hits that’s the remedy. Like everyone else i’ve noticed that mix is much clearer and wider, instruments more separated and focused. I also have noticed that i’m using less outboard and plugins. Seriously. If you choosing between good compressors or eq’s (good means ADL, SSL etc) vs good summing box (you would need audio interface to support that too) without hesitation go for analog summing – you won’t be dissapointed if you want your mixes sound 3d. Also box is quiet as a mouse. I was little afraid to pick some noise on the way. But no ! – it’s just way superior to digital bouncing and that’s all! 

Just a quick note to say how pleased I am with the summing mixer.

Ive summed a piano session and a jazz session and all I can say is that it makes things sound finalised or complete! Its hard to put my finger on it. It’s like a sonic glue! There is definitely a stability that it adds. Sounds like a record! All the best! Alex

read more on gearslutz 

Analog Summierer und Mischer

Solid state komplett analog und symmetrisch aufgebauter Signalpfad

Passive Summing mixer come by 5  type of dB reduction 

*Basic Setup reduction :-15dB by default please let me know before you make an order


  • SUB MINIMAL: -6.5dB

  • MINIMAL: -10dB gain reduction – ideal for low level preamps or DAW mic pre or instrument input

  • LOW: -15dB gain reduction – ideal for entry level preamps or DAW mic pre or instrument input

  • MID: -20dB gain reduction – ideal for mid range preamps or DAW mic pre or instrument input

  • HIGH: -25dB (or more) gain reduction – ideal for high range preamps like Neve, Api, Avalon or DAW mic pre

16 in DSUB passive summing mixer CH Insert / Master Insert / 3 x Stereo out

16 input DSUB passive summing mixer TRS insert / 2 x Stereo out TRS / XLR balanced

Dual Stereo Balanced Summing Network from input to output

  • In/Out:Balanced, floating to ground

  • Insertion input resistance: -10dB, -15dB / -20dB / -25dB or more  (order)

  • Output impedance 600-1k ohms balanced 

  • Output level: -15 dB nominal (basic setup)

  • Frequency response: 0-500Khz

  • Crosstalk 1Khz: -95dB

  • In/Out:   Balanced, floating to ground

  • Signal/ Noise rate: -110dB (RME HDSP tested, no DAW inputs connected)

  • TRS wiring: (Tip:HOT/,Ring:COLD/Sleeve:GROUND)

  • Pure hand made! Hand wired and tested point-to-point!

  • Selected VISHAY DALE military metal-film resistors!

  • Laser engraved massive aluminium alloy box!4


19-inch rack 8 - 64 Input channel summing

no price indicated unique audio - ask for price

4 6 8 10 12 14 16 20 24 32 56 64 96 input channel studio summing mixer

10 ch summing mixer designed for UAD Apollo x8

10 ch summing mixer designed for UAD Apollo x8 with Total Bypass on 1/2 input

Designed for Presonus Studio 1824c 10 input summing mixer

I bought the little one 10 from vintage maker it has 4 switches from stereo to mono on one for 1/2 ch and 3/4 ch and 9/10 ch which is for monitor and one switch for 1/8 ch I have it hook up to my PreSonus Studio 192 and wow excellent sound get that wide loudness and clearer sound im really impressed with my decision on getting this box and for low price cant beat that no where if u reading this thank u paul ps RBT (read more on gearslutz…)

4 ch passive summing mixer with stereo to mono designed for Focusrite Scarlett 6i6

16 input summing with Apollo x6 and ADA8200 DIR switch

4 ch passive summing mixer with stereo to mono designed for Universal Audio UAD Apollo Twin X

Record summed audio signal through the Genuine Sound of Neve, Helios, API, Manley and more emulations.

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