Summing Mixers 1 - 2 Unit Rack Passive
from 8 input to 64 input channel balanced mixers
Dual independent Passive Discrete Summing Mixer DB25 DSUB / TRS with 4xStereo to 8 Mono input
SUM1: 4 x Stereo in 1 x Stereo out
SUM2: 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 5 type of gain make up requirements:
- MINIMAL: -6,5db / -10dB gain reduction
- LOW: -15dB gain reduction
- MID: -20dB gain reduction
- HIGH: -25dB (or more) gain reduction
Select gain Reduction: -6,5dB / -10dB / -15dB / -20dB / -25dB (order)
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...about Stereo to Mono summing feature
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
- 2 x Stereo to4 mono on ST1/ST2
- 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 6-8 business/working weekdays (estimated)
Harmonic Distortion - Colour factor - Passive Summing Advantages
Passive Discrete Summing Mixer DB25 DSUB 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
- 2 x Stereo to 4 Mono
- Master Send/Return by Switch via TRS balanced
- Laser engraved
- Unique design
- Build time 6-8 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...about Stereo to Mono summing feature
CONTACT ME FOR UNIQUE SETUP : vintagemaker@gmail.com
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
- 4 x Stereo to Mono = 8 Mono by switch
- Laser engraved
- Unique design
- Build time 6-8 business/working weekdays (estimated)
Passive Summing mixer come with 4 type of gain make up requirements:
Required Make Up Gain Range relative to 0dBsf (please let me know before make order)
- Minimal: -10dB gain reduction
- 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 gain reduction ideal for high range preamps like Neve, Api, Avalon or DAW mic pre
- Contact for custom unque order!
Select gain Reduction: -6,5dB / -10dB / -15dB / -20dB / -25dB (order)
For mono signals READ MORE...
CONTACT ME FOR UNIQUE SETUP : vintagemaker@gmail.com
Passive Discrete Summing Mixer 10 ch input DIR /INSERT/2xSTM
5 x Stereo in 2 x Stereo out
Price: order
- 1U Standard Rack
- 8 input by DB25/ d'sub Tascam Analog balanced
- 2 input TRS (UAD Apollo x8 Monitor)
- DIR switch for UAD (direct monitoring see diagram)
- 2xStereo OUT by 1,4" TRS L/R balanced
- 2 x Stereo to Mono = 4 Mono by switch
- Master Insert SND/RET/Bypass ISA preamp
- Laser engraved
- Unique design
- Build time 6-8 business/working weekdays (estimated)
Select gain Reduction: -6,5dB / -10dB / -15dB / -20dB / -25dB (order)
For mono signals READ MORE...
CONTACT ME FOR UNIQUE SETUP : vintagemaker@gmail.com
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
- 2 x Stereo to 4 Mono input conversion switch
- Laser engraved
- Unique design
- Build time 6-8 business/working weekdays (estimated)
For mono signals READ MORE...about Stereo to Mono summing feature
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 16 Mono = 16 Mono by switch
- Laser engraved
- Unique design
- Build time 8 business/working weekdays (estimated)
Passive Summing mixer come with 4 type of gain make up requirements:
Required Make Up Gain Range relative to 0dBsf (please let me know before make order)
- MINIMAL: -6,5dB / -10dB
- 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!
Select gain Reduction: -6,5dB / -10dB / -15dB / -20dB / -25dB (order)
For mono signals . READ MORE...about Stereo to Mono summing feature
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
- 2 x Stereo to 4 mono on stereo 1/2 and 3/4 = 4 mono by switch
- Laser engraved
- Unique design
- Build time 6-8 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 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)
- 2 x Stereo to 4 mono on stereo 1/2 and 3/4
- Laser engraved
- Unique design
- Build time 6-8 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 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 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)
- 2 x Stereo convert to 4 Mono by 2xSwitch
- 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
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)
- 4 x Stereo conversion to 8 Mono by 4xSwitch
- 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)
- MINIMAL: -6,5dB / -10dB reduction
- 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
Select gain Reduction: -6,5dB / -10dB / -15dB / -20dB / -25dB (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...
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
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
- 2 x Stereo conversion to 4 Mono by 2xSwitch
- Master Send/Return by switch via TRS balanced
- Laser engraved
- Unique name engrave
- Build time 8 business/working weekdays (estimated)
MINIMAL:-6,5dB / -10dB reduction
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
Select gain Reduction: -6,5dB / -10dB / -15dB / -20dB / -25dB (order)
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 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 4 type of gain make up requirements:
Required Make Up Gain Range relative to 0dBsf
Minimal: -6,5dB/ -10dB gain reduction
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
Select gain Reduction: -6,5dB / -10dB / -15dB / -20dB / -25dB (order)
Contact for custom unque order!
Stereo to Mono input conversion READ MORE...
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 +6,5 /+10/+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...
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 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...
- Group summing mixer
- 32 input (DB25 X 3 + 8 Trs Inputs )
- A - 8 (DB25) inputs go to group output 1x Stereo L&R TRS
- B - 8 (DB25) inputs go to group output 1x Stereo L&R TRS
- C - 8 (DB25) Inputs go to group output 1x Stereo L&R TRS
- D - 8 (analog TRS) inputs go to group output 1x Stereo L&R TRS
- 1 stereo/mono switch for each group for a total of 4 switches.
For mono signals . READ MORE...
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 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 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 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 4 type of gain make up requirements:
Required Make Up Gain Range relative to 0dBsf (please let me know before make order)
MINIMAL: -10dB gain reduction
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...
Mixbus Matrix Passive Mixer
Price: order
- 2U Rack Unit
- 16 input TRS Balanced
- 1xStereo out TRS Balanced L/R (OUTA)
- 1xStereo out XLR Balanced L/R (OUTB)
- 2x Stereo to mono switch = 4 mono
- Multi insert/send/return/bypass switch option TRS
- 4 x (SNDA/SNDB/SNDC/SNDD)- horizontal switch layout
- 8 x Master Sum / Group Sum select switch
- 4 x 8 = 32 ABCD Group Matrix
- ABCD Group send TRS balanced L/R
- ABCD Group return TRS balanced L/R
- Matrix Return A/B stereo to Mono
- Master Stereo to Mono option by switch
- Gratis engrave: "designed for CHO Yong uk by VintageMaker"
- -25dB insertion loss (designed for Neve 1073)
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!