Summing Mixers 1 - 2 Unit Rack Passive

 from 8 input to 64 input channel balanced mixers

 

Passive dual 8x2 summing D-Sub TRS 4xSTM 

Dual independent Passive Discrete Summing Mixer DB25 d'sub /TRS with 4xStereo to 8 Mono input 

SUM 1: 4 x Stereo in 1 x Stereo out

SUM 2: 4 x Stereo in 1 x Stereo out

Price: order

  • 1U Standard Rack
  • 2x8 input by DB25/DSUB Tascam Analog balanced
  • 2x1 Stereo OUT by 1,4" TRS L/R balanced
  • 2x2xStereo to Mono = 2x4 Mono by switch
  • Laser engraved 
  • Unique design
  • Designed for Neve 1073 preamp
  • -25dB insertion loss sum network

Passive Summing mixer come with 3 type of gain make up requirements:

Required Make Up Gain Range relative to 0dBsf (please let me know before make order)

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

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

HIGH: -25dB gain up  ideal for high range preamps like Neve, Api, Avalon or DAW mic pre

Contact  for custom unque order!

 

For mono signals (such as kick, snares, lead vocals or bass that should appear centered in the middle of a mix), it would be a waste to use (Stereo L/R panned channels) what would amount to two required converters for a mono result. In such cases, channel pairs 1 & 2, 3 & 4 etc may be switched to mono mode (CH1 to 1-2), so that, for example, there might be a (mono) kick on channel 1, snare on channel 2 and bass on channel 3, etc. READ MORE...

 

 

 

 

 

 

Passive 8x2 summing D-Sub TRS 2STM 8 INSERT

Summing Mixer DB25 d'sub TRS - 2xStereo to Mono- 4xStereo insert send return

4 x Stereo in 1 x Stereo out

Price: order

  • 1U Rack Unit Summing Mixer
  • 8 input by D-sub Tascam Balanced
  • 2xStereo out by TRS balanced L/R
  • 2xStereo to mono on ST1/ST2 = 4 Mono by switch
  • 4x Stereo CH Send out D-sub = 8 SND (4ST)
  • 4x Stereo CH Return/Bypass switch D-sub 8 RET (4ST)
  • -15dB insertion loss version sum network
  • Laser engraved 
  • Build time 6 business/working weekdays (estimated)

 

 

Passive Summing Box 8x2 D-Sub/TRS 2xSTM INSERT

Passive Discrete Summing Mixer DB25 d'sub TRS with 4xStereo/Mono and insert input 

4 x Stereo in 1 x Stereo out

 

Price: order

  • 1U Standard Rack
  • 8 input by DB25/DSUB Tascam Analog balanced
  • 1xStereo OUT by 1,4" TRS L/R balanced
  • 2xStereo to Mono = 4 Mono by switch
  • Master Send/Return by Switch via TRS balanced
  • Laser engraved 
  • Unique design
  • Build time 6 business/working weekdays (estimated)

Master Send/Return option: SEND master signal to external EQ, Comp, Limiter

 

  • 2xSwitch version:  Bypass Send/Return / or / Enable Send/Return by switch

  • Auto TRS version: signal was non iterrupted if nothing connected to SEND out TRS

For mono signals . READ MORE...

CONTACT ME FOR UNIQUE SETUP :  vintagemaker@gmail.com

 

Passive Summing 8x2 D-Sub TRS 4xSTM

Passive Discrete Summing Mixer 8 channel DB25 input - TRS out with 4xStereo/Mono 

4 x Stereo in 1 x Stereo out

 

Price: order

 

  • 1U Standard Rack
  • 8 input by DB25/ d'sub Tascam Analog balanced
  • 1xStereo OUT by 1,4" TRS L/R balanced
  • 4xStereo to Mono = 8 Mono by switch
  • Laser engraved 
  • Unique design
  • Build time 6 business/working weekdays (estimated)

Passive Summing mixer come with 3 type of gain make up requirements:

Required Make Up Gain Range relative to 0dBsf (please let me know before make order)

 

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

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

HIGH: -25dB gain up  ideal for high range preamps like Neve, Api, Avalon or DAW mic pre

Contact  for custom unque order!

 

For mono signals READ MORE...

 

CONTACT ME FOR UNIQUE SETUP :  vintagemaker@gmail.com

 

1U Passive 16x2 summing box D-Sub TRS 2xSTM 

Passive Discrete Summing Mixer DB25 in /TRS out with 2xStereo/Mono input option 

Price: order

  • 1U Standard Rack
  • 16 input by DB25/DSUB Tascam Analog balanced
  • 1 Stereo OUT by 1,4" TRS L/R balanced
  • 2xStereo to Mono = 4 Mono by switch
  • Laser engraved 
  • Unique design
  • Build time 6 business/working weekdays (estimated)

 

Passive Summing mixer come with 3 type of gain make up requirements:

Required Make Up Gain Range relative to 0dBsf (please let me know before make order)

 

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

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

HIGH: -25dB gain up  ideal for high range preamps like Neve, Api, Avalon or DAW mic pre

Contact  for custom unque order!

 

For mono signals  READ MORE...

 

 

1U Passive Mixer 16x2 D-Sub in XLR out 8xSTM 

Passive Discrete Summing Mixer DB25 d'sub in/ TRS out with 8 Stereo to 16 Mono input option 

 

Price: order

  • 1U Standard Rack
  • 16 input by DB25/DSUB Tascam Analog balanced
  • 1 Stereo OUT XLR L/R balanced
  • 8 x Stereo to Mono = 16 Mono by switch
  • Laser engraved 
  • Unique design
  • Build time 8 business/working weekdays (estimated)

Passive Summing mixer come with 3 type of gain make up requirements:

Required Make Up Gain Range relative to 0dBsf (please let me know before make order)

 

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

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

HIGH: -25dB gain up  ideal for high range preamps like Neve, Api, Avalon or DAW mic pre

Contact  for custom unque order!

 

For mono signals . READ MORE...

 

16x2 D-Sub in TRS out 2xSTM 2 x INSERT OUT A/B

Passive Discrete Summing Mixer DB25 d'sub /TRS with 2xSTM Dual insert send return A or  B

Price: order

  • 1U Standard Rack 19" unit
  • 16 input by DB25 Tascam Standard Balanced
  • 2x Stereo indepent output by TRS balanced L/R (A / B)
  • A / or / B select for SENDA/SENDB switch
  • Send/Return by Auto TRS switch for Out A
  • Send/Return/by Auto TRS switch for Out B
  • 2xStereo to mono on stereo CH1 and CH2 = 4 mono by switch
  • Laser engraved 
  • Unique design
  • Build time 7 business/working weekdays (estimated)

 

For mono signals  READ MORE...

 

Master Send/Return option: SEND master signal to external EQ, Comp, Limiter

 

  • 2xSwitch version: You can Bypass Send/Return / or / Enable Send/Return by switch
  • Auto TRS version: signal was non iterrupted if nothing connected to SEND out TRS

 

Passive Summing mixer 16x4 TRS in TRS out 2xSTM with Master Insert

Passive Discrete Summing Mixer TRS in/TRS out with 2xSTM send/return 

Price: order

  • 1U Standard Rack 19" unit
  • 16 input by DB25 Tascam Standard Balanced
  • 2x Stereo output by TRS balanced L/R (Main/Monitor)
  • 2xStereo to mono on stereo CH1 and CH2 = 4 mono by switch
  • Laser engraved 
  • Unique design
  • Build time 6 business/working weekdays (estimated)

For mono signals  READ MORE...

 

Master Send/Return option: SEND master signal to external EQ, Comp, Limiter

 

  • 2xSwitch version: You can Bypass Send/Return / or / Enable Send/Return by switch
  • Auto TRS version: signal was non iterrupted if nothing connected to SEND out TRS

 

1U Passive 16x4 d'sub /TRS 2xSTM 4xSND/RET

Passive Discrete Summing Mixer d'sub in / TRS out 2xSTM  and 4x send/return 

Price: order

  • 1U Standard Rack 19" unit
  • 16 input by TRS balanced
  • 2xStereo OUT by TRS balanced (main/monitor)
  • 2xStereo convert to 4 Mono by 2 Switch
  • 4xSEND/RETURN by switch via TRS balanced SNDA/SNDB/SNDC/SNDD
  • Laser engraved 
  • Unique design
  • Build time 9 business/working weekdays (estimated)

Multiple SEND/RETURN: You can connect  in CHAIN more than one external processor like Eq, Comp,Limiter, each processor have their DEDICATED Send/Return on the summing side, can be select or deselect - include or exclude - Send or Bypass the desired external gear in the chain, for example:

 

  • SNDA/RETA: EQ
  • SNDB/RETB: COMPRESSOR
  • SNDC/RETC: Limiter
  • SNDD/RETD: Master Reverb

Input Chanel SEND/RETURN: for external process of signal before enter in to the summing 

  • SEND always active when the appropriate input signal connected to summing, for example:
  • INPUT 1/2 = SEND 1/2, INPUT3/4 = SEND 3/4 and so on

RETURN signal: bypass or enable by two position switch:

  • Bypass: by default  switch down = regular input mode no signal process
  • Enable: switch up = processed signal enabled on Return (unprocessed signal disabled)

 

Passive 20x4 DSUB TRS TRS 2xSTM Master Insert

Passive Discrete Summing Mixer DB25/TRS in/TRS out with 2xSTM 1xSND/RET 

Price: order

  • 1U Standard Rack 19" unit
  • 16 input by DB25 d'sub Tascam Standard Balanced (1-16)
  • 4 input by TRS (17-20)
  • 2x Stereo output by TRS balanced L/R (Main/Monitor)
  • 2xStereo convert to Mono by 2xSwitch = 4 mono 
  • Master Send/Return by switch via TRS balanced
  • Laser engraved 
  • Unique design
  • Build time 7 business/working weekdays (estimated)

Contact  for custom unque order!

 

For mono signals  READ MORE...

Master Send/Return: SEND master signal to external EQ, Comp, Limiter

  • 2xSwitch version: You can Bypass Send/Return / or / Enable Send/Return by switch
  • Auto TRS version: signal was non iterrupted if nothing connected to SEND out TRS

 

Passive 24x4 TRS/TRS 4xSTM 1xSND/RET

Herb Belofsky  Drummer · Austin, Texas

https://www.gearslutz.com/board/showpost.php?p=8456455&postcount=70

I was considering the Rolls 16 ch passive summing mixer but on Ebay, I discovered Paul Taylor's Vintagemaker products. I emailed him to ask some questions and found his response to be positive and quick. I asked him to build me a 24 ch passive summing mixer with the insert feature and 8 chs of mono/stereo (switchable). He made and delivered the unit within 2 weeks (most of that shipping time was in customs in NY).

He sent pics via email and regular updates as the unit was made.

I plugged it into my studio, 1-24 Pro tools (Outs) and found the Neve 1272s to be the best sounding pre amps for the 2 buss on the mixes I was working on. the TubeTech MP1A also sounded great, the Focusrite was nice and the APIs were ok, too. My REVIEW: Clarity and Glue. It clearly sounds better than in the box summing, but you all knew that would be the case. It also sounds better than the AMEK console that I had been using for summing mixes. I had sold the console and this was one of the replacement parts. I am Very Happy. I would highly recommend Paul Taylor's custom built products. he was easy to deal with, great communication and ultimately a great sounding box that let me interface the preamps I already have as the 2 buss. A serious upgrade for a box that is reasonably priced for what it does. I would love to hear the other active summing mixers that he makes, but for now, I am a happy studio owner with the box he sent me. Thanks, Paul.

Passive 24 channel Discrete Summing Mixer TRS in/TRS out with 4xSTM 1xSND/RET 

Price: order

 

  • 1U Standard Rack 19" unit
  • 24 input by TRS Balanced 
  • 2x Stereo output by TRS balanced L/R (Main/Monitor)
  • 4xStereo conversion to Mono by 4xSwitch = 8 mono 
  • Master Send/Return by switch via TRS balanced
  • Laser engraved 
  • Unique name engrave
  • Build time 8 business/working weekdays (estimated)

 

Passive Summing mixer come with 3 type of gain make up requirements:

Required Make Up Gain Range relative to 0dBsf (please let me know before make order)

 

  • LOW: -15dB gain up  ideal for entry level preamps or DAW mic pre or instrument input
  • MID: -20dB gain up  ideal for mid range preamps or DAW mic pre or instrument input
  • HIGH: -25dB gain up  ideal for high range preamps like Neve, Api, Avalon or DAW mic pre

For mono signals (such as kick, snares, lead vocals or bass that should appear centered in the middle of a mix), it would be a waste to use (Stereo L/R panned channels) what would amount to two required converters for a mono result. In such cases, channel pairs 1 & 2, 3 & 4 etc may be switched to mono mode (CH1 to 1-2), so that, for example, there might be a (mono) kick on channel 1, snare on channel 2 and bass on channel 3, etc. READ MORE...

 

Master Send/Return option: SEND master signal to external EQ, Comp, Limiter

  • 2xSwitch version: You can Bypass Send/Return / or / Enable Send/Return by switch
  • Auto TRS version: signal was non iterrupted if nothing connected to SEND out TRS

CONTACT FOR UNIQUE SETUP

 

gallery/gsprintable

 

Passive Summing 24x4 D-Sub/TRS in /XLR out 2xSTM 1xSND/RET

Passive Discrete Summing Mixer DSUB d'sub /TRS in/XLR out with 2xSTM 1xSND/RET 

Price: order

  • 1U Standard Rack 19" unit
  • 8 input by DSUB Tascam Analog Balanced (1-8)
  • 16 input by TRS balanced (9-24)
  • 1x Stereo output by XLR balanced L/R
  • 2xStereo conversion to Mono by 2xSwitch = 4 mono 
  • Master Send/Return by switch via TRS balanced
  • Laser engraved 
  • Unique name engrave
  • Build time 8 business/working weekdays (estimated)

 

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

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

HIGH: -25dB gain up  ideal for high range preamps like Neve, Api, Avalon or DAW mic pre

For mono signals  READ MORE...

 

Master Send/Return option: SEND master signal to external EQ, Comp, Limiter

  • 2xSwitch version: You can Bypass Send/Return / or / Enable Send/Return by switch
  • Auto TRS version: signal was non iterrupted if nothing connected to SEND out TRS

 

Passive summing box 32 channel input TRS D-Sub in  XLR out 1xSTM 

Passive Discrete Summing Mixer TRS/DSUB d'sub in /XLR out with 1xSTM 

Price: order

  • 1U Standard Rack 19" unit
  • 8 input by TRS balanced (1-8)
  • 16 input by DSUB Tascam Analog Balanced (9-32)
  • 1x Stereo output by XLR balanced L/R
  • 1xStereo conversion to Mono by Switch = 2 mono 
  • Master Send/Return by switch via TRS balanced
  • Laser engraved 
  • Unique name engrave

Passive Summing mixer come with 3 type of gain make up requirements:

Required Make Up Gain Range relative to 0dBsf 

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

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

HIGH: -25dB gain up  ideal for high range preamps like Neve, Api, Avalon or DAW mic pre

Contact  for custom unque order!

For mono signals  READ MORE...

 

 

32 input channel mixer TRS / D-Sub in /XLR out 4xSTM 

how to connect summing mixer box

Passive Discrete Summing Mixer DB25/TRS in/TRS out with 2xSTM 1xSND/RET 

Price: order

 

  • 1U Standard Rack 19" unit
  • PRIMARY 16 INPUT: 16  IN TRS (8L and 8R) 1-16
  • SECONDARY 16 INPUT: 16 IN DSUB (8L and 8R) 17-32
  • Select switch ON/OFF SECONDARY input 17-32
  • OUTPUT: 1xStereo Out - XLR Balanced L/R
  • 2xStereo CH to mono = 4 mono input by switch on 1/2 and 3/4 (TRS primary input)
  • 2xStereo CH to mono = 4 mono input by switch on 17/18 and 19/20/(DB25 secondary input)
  • Input 1/2 bypass switch - for direct monitoring purposes
  • Master out MONO mix compatibility test by switch
  • Build time 10 business/working weekdays (estimated)

Why choose VintageMaker Passive Summing ?


Requires only +15/+20/+25 dB of make-up gain! (depend of required setup)
Fully balanced solid state network & switching network from input to output.
Can be left "free" unconnected inputs 4-8-16! No unused input problem!
No thermal noise on passive mode due to custom-developed balanced summing network.
Absolutely repeatability DAW control: Volume Panorama, EQ, and effects sends of your mix from within the DAW, and send as many as 4-8-16 different tracks or submixes to Summing Mixer.
Can handle both balanced/unbalanced signal from synth like Moog, Nord, Yamaha etc.
Can handle large external instruments like samplers, tape machines, drummachines etc.
Can be fit to all brand of DAW interfaces like Digidesign 192, Avid HD I/O 16X16,Universal Audio, RME Fireface, Prism, Lynx Aurora, Apogee, Motu, Focusrite, Metric Halo, Steinberg MR816, and so on..
Can handle external signal processors eg. EQ, Compressor, Limiter, Multi Effects Processors like Massenburg, Drawmer S3, Lexicon, Alesis, Tube-Tech LCA2B, JoeMeek, FMR Audio RNC DBX, ART etc.
Can handle large number of external mic preamps like AMS Neve 1073,Aphex Channel, Great River, Avalon, Chandler Limited, Crane Song, SPL, Focusrite, Presonus, Midas, Summit Audio, ART Pro and so on...
Extremely simple, Discrete, pure, and transparent signal path.
Can be used for external DAW summing or as a line summing mixer for effects external pres,instruments, synths, drum machines or any (balanced/unbalanced) line signal! 
Other passive summing mixers on the marketplace requires +30/+40dB makeup gain!
More than 1500 happy customers since 2010!

 

For mono signals (such as kick, snares, lead vocals or bass that should appear centered in the middle of a mix), it would be a waste to use (Stereo L/R panned channels) what would amount to two required converters for a mono result. In such cases, channel pairs 1 & 2, 3 & 4 etc may be switched to mono mode (CH1 to 1-2), so that, for example, there might be a (mono) kick on channel 1, snare on channel 2 and bass on channel 3, etc. READ MORE...

 

Passive 32x2 D-Sub in / XLR out 2xSTM 

Summing Mixer 32x2 DSUB in / XLR out with 2xSTM  

Price: order

 

  • 1U Standard Rack 19" unit
  • 32 input by DSUB Tascam Balanced 
  • 1x Stereo output by XLR balanced L/R (Main/Monitor)
  • 2xStereo conversion to Mono by 2xSwitch = 4 mono 
  • Laser engraved 
  • Unique name engrave
  • Build time 10 business/working weekdays (estimated)

 

Contact  for custom unque order!

 

For mono signals  READ MORE...

 

 

 

 

Passive 32x4 TRS D-Sub in / TRS/XLR out 4xSTM Gain CTRL

Passive Discrete Summing Mixer 32x4 TRS/DSUB in / TRS/XLR out with 4xSTM + POT Control + Master Mono + Direct Monitor switch

Price: order

  • 1U Standard Rack 19" unit
  • 32 input by TRS/DSUB :
  • 1-8 input TRS balanced
  • 9-32 input DB25 Tascam Standard Balanced
  • 2x Stereo output by TRS/XLR balanced L/R (Main/Monitor)
  • 4xStereo conversion to Mono by 2xSwitch = 8 mono 
  • 2xSTM ST1/ST2 (1-4 TRS IN)
  • 2xSTM ST5/ST6 (9-12 DSUB IN)
  • Master Stereo to Mono (mix mono compatibility test)
  • Stereo input 1 L/R to Master outputs - Direct Monitoring purposes
  • 21 step precision Attenuator 0dB range - 20dB 
  • Laser engraved 
  • Build time 10 business/working weekdays (estimated)

For mono signals . READ MORE...

 

 

Passive 32x2 DSUB d'sub in / XLR out 1xSTM 

Passive Discrete Summing Mixer 32x2 DSUB in / XLR out with 1xSTM  

Price: order

 

  • 1U Standard Rack 19" unit
  • 32 input by DSUB Tascam Balanced 
  • 1x Stereo output by XLR balanced L/R (Main/Monitor)
  • 1xStereo conversion to Mono by 1Switch = 2 mono 
  • Laser engraved 
  • Unique name engrave
  • Build time 10 business/working weekdays (estimated)

 

 

 

 

Passive 48x2 DSUB in / TRS out 1xSTM 

Passive Discrete Summing Mixer 48x2 DSUB in / TRS out with 2xSTM  

Price: order

  • 1U Standard Rack 19" unit
  • 48 input by DSUB Tascam Balanced 
  • 1x Stereo output by TRS balanced L/R (Main/Monitor)
  • 1xStereo conversion to Mono by 1Switch = 2 mono 
  • Laser engraved 
  • Unique name engrave
  • Build time 11 business/working weekdays

***48 input can fit in 1U only by DD25 tascam with 1xStereo TRS out L/R see photos

 

Contact  for custom unque order!

 

For mono signals  READ MORE...

 

 

Passive 24x4 D-sub in / XLR out 4xSTM SND/RET

Passive Discrete Summing Mixer 24x4 DSUB in / XLR out /XLR Insert Send/Return

Price: order

 

  • 2U Standard Rack 19" unit
  • 24 input by 3 x DSUB Tascam Balanced 
  • 2x Stereo output by XLR balanced L/R (Main/Monitor) 
  • Master Insert Send/Return by XLR balanced
  • Laser engraved 
  • Unique name engrave
  • Build time 14 business/working weekdays (estimated)

Master Send/Return option:

 

SEND master signal to external EQ, Comp, Limiter

 

  • 2xSwitch version: You can Bypass Send/Return / or / Enable Send/Return by switch
  • Auto TRS version: signal was non iterrupted if nothing connected to SEND out TRS

 

Passive 64 channel summing mixer DSUB in / TRS out 

Passive Discrete Summing Mixer 64x2 DSUB in / TRS out 

Price: order

  • 2U Standard Rack 19" unit
  • 64 input by DSUB Tascam Balanced 
  • 2x Stereo output by TRS balanced L/R (Main/Monitor) 
  • Laser engraved 
  • Unique name engrave
  • Build time 14 business/working weekdays (estimated)

mixer come with 3 type of gain make up requirements:

 

Required Make Up Gain Range relative to 0dBsf (please let me know before make order)

 

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

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

HIGH: -25dB gain up  ideal for high range preamps like Neve, Api, Avalon or DAW mic pre

Contact  for custom unque order!

 

For mono signals  READ MORE...

 

neumann summing

Fully balanced solid state network & switching network from input to output.

 

Can be left "free" unconnected inputs 2-4-6! No unused input problem!

 

No thermal noise on passive mode due to custom-developed balanced summing network.

 

Absolutely repeatability DAW control:

 

Volume Panorama, EQ, and effects sends of your mix from within the DAW, and send as many as 2-4-6-8 different tracks or submixes to Summing Mixer.

Can handle both balanced/unbalanced signal from synth like Moog, Nord, Yamaha etc.

Can handle large external instruments like samplers, tape machines, drummachines etc.

Can be fit to all brand of DAW interfaces like Digidesign 192, Avid HD I/O 16X16,Universal Audio, RME Fireface, Prism, Lynx Aurora, Apogee, Motu, Focusrite, Metric Halo, Steinberg MR816, and so on..

Can handle external signal processors eg. EQ, Compressor, Limiter, Multi Effects Processors like Massenburg, Drawmer S3, Lexicon, Alesis, Tube-Tech LCA2B, JoeMeek, FMR Audio RNC DBX, ART etc.

Can handle large number of external mic preamps like AMS Neve 1073,Aphex Channel, Great River, Avalon, Chandler Limited, Crane Song, SPL, Focusrite, Presonus, Midas, Summit Audio, ART Pro and so on...

Extremely simple, Discrete, pure, and transparent signal path.

Can be used for external DAW summing or as a line summing mixer for effects external pres,instruments, synths, drum machines or any (balanced/unbalanced) line signal!