• Rackmountable (1Unit)  Plug & Play! + Laser engraved unique design!
  • AMP: Lawo DV975 Dual mutually independent Vintage summing amplifier (up to 100 inputs,based on techn.documentation  Lawo GmbH)
  • Max output gain: + 30dBm
  • Max input gain: + 6dBm
  • Gain adjustment range: +6 - 30dB)
  • Standard level inputs:   Balanced, floating to ground
  • Standard level outputs: Balanced, floating to ground
  • Output impedance (load imp) : >300ohm
  • Crosstalk attenuation: >110db from channel to channel
  • Frequency response: <+0/-0,25dB (20Hz to 20kHz: <+0/-0,5dB
  • Signal/ Noise rate: <-101dBqp (measured with not connected DAW inputs)
  • Extraneous signal level with V=0db : <-99dMrms/-94dBmrms with 1/30 sources
  • Transformers:   Haufe / Pikatron

  • SUMMING: Discrete Stereo Summing  network
  • Selected  Vishay Dale metal-film resistors
  • In/Out:   Balanced, floating to ground
  • Signal/ Noise rate: -101dB (RME HDSP tested, no DAW inputs connected)
  • TRS connection wiring: (Tip:HOT/,Ring:COLD/Sleeve:GROUND)
  • Operation voltage: 21,6 - 28V/100mA
  • 100 – 240//24V – 0.8-1.5A adapter + 2pin connector
  • Rackmounted (1Unit)
  • Laser engraved unique design(front/rear panel)
  • Rack Color: RAL BLACK or metalised green-blue
  • Unit Weight: 3.1Kg(7 lbs), Packed (with adapter+cable) weight ca. 4,2kg(9 lbs)


Modification: recap, LP / HP broadcast filters eliminated and bridged.

designed and created by VintageMaker

Fully balanced Solid State Discrete summing network. The components are tested and selected. (Vishay Dale resistors) Good quality components result  the correct and low noise operation. The summing network PCB is own development, and absolutly hand made. The front/rear panel design based on unique idea. Future order: Unique ideas, plans like: channel number, design(your name or studio name) connections (DB25, TRS etc.) please contact me, to make the most appropriate gear for your studio! (build time 5-10 working days) Please  click to order page.

  • Based on customers feedback, the Lawo summing amps are mostly transparent and clean with really nice harmonics due to legendary Haufe/ Pikatron transformers. Read more about Filtek/Neumann/Lawo customer feedback / reviews.....

BEFORE MOD                       AFTER MOD
Technical details

LittleMc 2x2 Controller
LittleOne Summing Mixer
LittleKnob Controller
How to mix in analog - 3 important steps

1. HEADROOM - always perform in the Passive summing network.
"Gain staging is like pulling the focus of a camera lens" You can achieve this by entering in the summing unit by/with hotter levels" (from your DAW interface or synth, drum machine etc.) Need to find/hit the right high/hot gain for all your instruments/tracks sent to summing box- individually, hit the "gentle distortion" point, where the subtle distortion starts gently and it's about right. It basically impossible to do that  ITB [In-The-Box] over 0dB starts to distort during gain staging, simply the digital bounce not allow to send hot (high gain)
2. SEPARATION - Panorama - always perform in the Passive summing network.
Find for all your instruments the right places in to the stereo field, the right locations where they sit better in to the whole mix. Don't forget - your instruments are mixed in the analog domain as sinusoidal voltages!
3. MAKEUP GAIN - Gain staging - Drive the amp!
Make up gain "crank it up" - make up gain by your mic pres or internal summing amp, and hit the sweet spot of master mix, then print/record.
It's important to find the sweet-spot when the level and subtle distortion is just about right, depending on the song and production. ITB has no sweet-spot and there's really no reward running the levels a bit too hot, on the contrary is even makes the mix sound worse.

US customer review

I was used to mixing in the box, and I knew my way around it. You always need to make more room. I realized I wasn’t doing that anymore, and was not needing many of the tricks I used to do to get closer to what I was hearing in my mind, so I wanted to learn how much headroom I got. I fed my converters with the hottest signal in the center of the panorama and started automating the faders around it. Soon enough, the magic happened: the summing box started purring like a happy big cat and I knew that was the sound I always struggled to reach, the famous and legendary “warmth and openness of analog” I so many times read about. "The analog sweetspot".

No A/B comparison tests due to following reasons:
Every studio setups are different, different mixing strategy, different style, sound and production, can't reproduce Your studio environment,  your studio setup, your monitor type, sound, preamp, amp, gain adjustment, cable, and etc..etc...
The sound character is very personal, as producer/seller and summing builder I can not say more, sorry:) you can read about my work, from my reputation, based on numerous customer feedback on web. I do not want to use some marketing phrases, beautiful words about my gears....my customers are musicians, producers,  sound engineers, from home  to big famous pro studios, experts like You, so you can read more below:

CUSTOMER FEEDBACK with gear description and pictures

Or visit GEARSLUTZ to read numerous opinions since 2011