Custom 1U Analog Summing Rack – Powered by Lawo DV975 NOS

This compact 1U rack unit packs serious analog summing power, built around the legendary Lawo DV975 NOS module.

• 32 balanced inputs via DB25
• 4 balanced TRS outputs (Main & Monitor)
• 5 x Stereo Monitor (STM) points on Inputs 1/2, 11/12, 17/18, 19/20, 25/26
• 4 Subgroups (DB25) with Send/Return and individual on/off switches
  • Channels 1–16 → Group A
  • Channels 17–24 → Group B
  • Channels 25–30 → Group C
  • Channels 31–32 → Group D
• 21-step precision gain control by Lawo (classic round-style knob)
• 110–240V external PSU (EU plug)
• Blue power LED
• Free custom name engraving included

Perfect for hybrid studio setups that demand analog depth and workflow flexibility — all in just 1U of rack space.

2-BUS+2-BUS – 4 four bus Custom Analog Summing Mixer 32 input channel 4 x sub group

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Setup:

1U Rack unit
Lawo DV975 NOS
32 in DB25 balanced
4 out TRS balanced (Main/Monitor)
5 x STM on 1/2, 11/12, 17/18, 19/20, 25/26
4 x Subgroups DB25 with SND/RET on off switches
Channel 1-16 –> Group A
Channel 17-24 –> Group B
Channel 25-30 –> Group C
Channel 31-32 –> Group D
21 step precision Lawo gain ctrl
*regular round style knob
110-240V external PSU EU plug
Power LED: Blue
Gratis Custom Name engraving 

The Lawo DV975 Analog Summing Mixer is a 1U rack unit that packs an impressive array of features.

With 32 inputs via DB25 balanced connectors and 4 outputs via TRS balanced connectors for main and monitor, this unit can handle a lot of audio sources.

One standout feature is the 5 STM (Stereo to Mono) switches which allow for easy mixing of stereo sources. These are located on channels 1/2, 11/12, 17/18, 19/20, and 25/26, making it simple to configure your setup as needed.

The DV975 summing also includes 4 subgroups with SND/RET on/off switches, providing flexibility for routing and processing channels. Channels 1-16 are assigned to Group A, channels 17-24 to Group B, channels 25-30 to Group C, and channels 31-32 to Group D.

Another great feature is the 21-step precision Lawosumming box  gain control. This allows for fine-tuning of levels and ensures accurate and consistent signal processing. The regular round style knob makes it easy to adjust the gain quickly and intuitively.

Overall, the Lawo DV975  is a well-designed and versatile unit that would be a great addition to any professional audio setup. Its compact size and range of features make it ideal for use in a variety of settings, from small studios to larger broadcast environments. If you’re looking for a high-quality 1U rack unit for your audio mixing needs, the Lawo DV975 is definitely worth considering.

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