DuTCH.audio IMx.c module based

• 2 stereo inputs with dedicated pushbutton per input
• Bypassable active gain with +/-5.5db gain range in 0.5dB per step (optional 0.25 per step and +/-2,75dB gain range = Input A 0.25)
• Left/right swap
• Polarity swap
• All inputs are Neutrik goldplated XLR’s

2 inputs:
You can choose between the 2 inputs by pushing the corresponding button. It’s also possible to use both inputs at the same time, but keep in mind that this will cause impedance and so level changes because of the channels summed together.

Swap L/R:
When you engage the ‘swap l/r’ button the left and right channel will be swapped in order. Sometimes this will bring things to the surface that you didn’t notice before because of the new listening approach.

Polarity:
The ‘polarity’ button will swap the polarity of both Left and Right. Sometimes swapping polarity will give a better response, mostly in the low frequencies. In most cases swapping polarity is not needed, but in the cases where you want to, this button comes in very handy. Keep in mind that obviously this only works with balanced signals.

Active gain:
Both inputs are passive with just relays, but by pushing the ‘active gain’ button you will enable the active gain stage which enables you to change the input gain to your liking. In the mid/0 position, there is no gain applied though it passes the active gain circuit. You can change the gain in 23x0.5dB steps from +5.5dB to -5.5dB with stepped switches.

artnr: Input type A 

• 2 stereo inputs with dedicated pushbutton per input
• Bypassable stepped active gain with +/-5.5db gain range in 0.5dB per step (optional 0.25 per step and +/-2,75dB gain range = Input A 0.25)
• Polarity swap.
• All inputs are Neutrik goldplated XLR’s

2 inputs:
You can choose between the 2 inputs by pushing the corresponding button. It’s also possible to use both inputs at the same time, but keep in mind that this will cause impedance and so level changes because of the channels summed together.

Polarity:
The ‘polarity’ button will swap the polarity of both Left and Right. Sometimes swapping polarity will give a better response, mostly in the low frequencies. In most cases swapping polarity is not needed, but in the cases where you want to, this button comes in very handy. Keep in mind that obviously this only works with balanced signals.

Active gain:
Both inputs are passive with just relays, but by pushing the ‘active gain’ button you will enable the active gain stage which enables you to change the input gain to your liking. In the mid/0 position, there is no gain applied though it passes the active gain circuit. You can change the gain in 23x0.5dB steps from +5.5dB to -5.5dB with stepped switches.

artnr: Input type B

• 2 stereo inputs with dedicated pushbutton per input
• bypass-able stepped active gain with +/-5.5db gain range in 0.5dB per step (optional 0.25 per step and +/-2,75dB gain range = Input type A 0.25)
• All inputs are Neutrik goldplated XLR’s

2 inputs:
You can choose between the 2 inputs by pushing the corresponding button. It’s also possible to use both inputs at the same time, but keep in mind that this will cause impedance and so level changes because of the channels summed together.

Active gain:
Both inputs are passive with just relays, but by pushing the ‘active gain’ button you will enable the active gain stage which enables you to change the input gain to your liking. In the mid/0 position, there is no gain applied though it passes the active gain circuit. You can change the gain in 23x0.5dB steps from +5.5dB to -5.5dB with stepped switches.

artnr: Input type C

• 1 stereo passive input.
• All inputs are Neutrik goldplated XLR’s

Input:
This is a basic passive input with just one input. Basically just 2x XLR input connectors straight into the first insert.

artnr: Input type D

• 4 stereo inputs with passive summing circuit.
• Active makeup gain with +/-5.5db gain range in 0.5dB per step
• DB25 Tascam standard connector for inputs (channel 1, 3, 5, 7 = left / channel 2, 4, 6, 8 = right)

Summing amp:
This is a 4x stereo input summing amp for analog summing/stem-mastering purposes. The summing is passive with just resistors, the makeup gain is active and is always active to make up for the gain loss of the analog summing. You can change the gain in 23x0.5dB steps from +5.5dB to -5.5dB with a stereo/dual gang stepped switch.

The input connector is a DB25 following the Tascam standard.
Channel 1, 3, 5 and 7 are Left inputs
Channel 2, 4, 6 and 8 are Right inputs

artnr: Input type E

• 2 passive inserts with order swap functionality (1 > 2 or 2 > 1)
• 3 buttons; 2x for inserts, 1x for swap

Passive with swap
This is a 100% passive insert section with just relays. When disabled, it will directly pass the signal internally to the next stage. When you enable the insert (1 and/or 2), it will pass the signal to the corresponding send/return. It will first pass insert 1 and then it goes into insert 2. When you push the ‘swap 1 /2’ button, it will swap the order of the inserts. So instead of 1>2 it will become 2>1.

This module can also be placed on a different position like insert 3/4 or 5/6.

artnr: Pass type A

• 2 passive inserts
• 2 buttons for inserts

Passive:
This is a 100% passive insert section with just relays. When disabled, it will directly pass the signal internally to the next stage. When you enable the insert (1 and/or 2), it will pass the signal to the corresponding send/return. 

This module can also be placed on a different position like insert 3/4 or 5/6.

artnr: Pass type B

• 2 passive inserts with pre/post swap functionality on second insert (1>2>..>7>8>out or 8>1>2>..>7>out)
• Pre function can also be placed at another position, for instance (1>2>3>4..>7>8>out or 1>2>8>3>4..>7>out)
• 3 buttons; 2x for inserts, 1x for pre (off is post, on is pre)

Pre/post:
This is a 100% passive insert section with just relays. With this module you can swap the order of both inserts from insert 8 to pre insert 1, so it basically becomes insert 0. When you push the ‘8 pre’ button, this is what will happen:

8 pre/post off: inputs > 1>2>3>4>5>6>7>8 > outputs|
8 pre/post on: inputs > 8>1>2>3>4>5>6 >7> outputs

artnr: Pass type C

• 2 passive inserts with pre/post swap functionality on first insert (1>2>..>7>8>out or 7>1>2>..>8>out)
• Pre function can also be placed at another position, for instance (1>2>3>4..>7>8>out or 1>2>7>3>4..>8>out)
• 3 buttons; 2x for inserts, 1x for pre (off is post, on is pre)

Pre/post:
This is a 100% passive insert section with just relays. With this module you can swap the order of the first insert from insert 7 to pre insert 1, so it basically becomes insert 0. When you push the ‘7 pre’ button, this is what will happen:

7 pre off: inputs > 1>2>3>4>5>6>7>8 > outputs
7 pre on: inputs > 7>>1>2>3>4>5>6>8 outputs

artnr: Pass type D

• 2 passive inserts with pre/post swap functionality on both insert (1>2>..>7>8>out or 7>8>1>2>..>out)
• Pre function can also be placed at another position, for instance (1>2>3>4..>7>8>out or 1>2>7>8>3>4..>out)
• 3 buttons; 2x for inserts, 1x for pre (off is post, on is pre)

Pre/post:
This is a 100% passive insert section with just relays. With this module you can swap the order of the second insert from insert 8 to pre insert 1, so it basically becomes insert 0. When you push the ‘8 pre’ button, this is what will happen:

7/8 pre off: inputs > 1>2>3>4>5>6>7>8 > outputs
7/8 pre on: inputs > 7>8>>1>2>3>4>5>6> outputs 

artnr: Pass type E

• 2x passive inserts with order swap (1 > 2 or 2 > 1)
• 'master/mix mode'. Sends the connected gear to a second DB25 when not inserted in the chain so that they can be used for send/return on something like a summing box.
• Because of its size, this module is only available for 2u units.

Master/mix:
This is a 100% passive insert section with just relays. When disabled, it will directly pass the signal internally to the next stage. When you enable the insert (1 and/or 2), it will pass the signal to the corresponding send/return. It will first pass insert 1 and then it goes into insert 2. When you push the ‘swap’ button, it will swap the order of the inserts. So instead of 1>2 it will become 2>1. When an insert (either 1 and/or 2) is not enabled in the chain, it will be send directly to the second DB25 mix mode connector. This way the connected equipment could be used for something else then just the masterchain like a summing box or aux on a mixer.

This module can also be placed on a different position like insert 3/4 or 5/6.

artnr: Pass type F

• 2 inserts with mid/side (working in mid/side on both inserts at once when engaged)
• MS can be bypassed to work in 100% passive mode.
• 3 buttons; 2x for insert, 1x for mid/side

MS mode:
When the mid/side mode is switched off, both inserts will be 100% passive and will not pass the active MS circuit. When you enable the MS circuit, it will pass the active MS matrix and signals will be encoded to mid (left) and side (right).

artnr: MS type A

• 2 inserts with mid/side (working in mid/side on both inserts at once when engaged)
• MS can be bypassed to work in 100% passive mode.
• seperate Mid and side mute
• Bypassable Width control with a stepped gain range of -6.5dB > 3.5dB
• 6 buttons; 2x for insert, 1x for mid/side, 2x mid/side mute, 1x width enable

MS mode:
When the mid/side mode is switched off, both inserts will be 100% passive and will not pass the active MS circuit. When you enable the MS circuit, it will pass the active MS matrix and signals will be encoded to mid (left) and side (right).

Width:
When you enable the ‘width’  button, the width circuit becomes active and you can change the gain of the side channel and so, making it more wide or narrow. We chose to use a dedicated width enable button for A/B purposes. The width gain range is -6.5/+3.5dB with 23 steps. This way you have more precise control then with course steps and a big range you probably won’t need. 

Mid / Side mute:
The ‘mute mid’ and ‘mute side’ buttons will let you mute mid or side so that you can listen to just the sum (mid) or the diff (side). 

Other MS functions:
When you don’t use the inserts, you can still make use of the mid/side functionality. When the ‘stereo/ms’ button is set to MS, it passes through the active MS circuit. This way you can change the gain of the side channel and you can also listen to just the mid or side channel by muting mid or side.

artnr: MS type B

• 2 inserts with mid/side (working in mid/side on both inserts at once when engaged)
• MS can be bypassed to work in 100% passive mode.
• Seperate Mid and side mute
• 5 buttons; 2x for insert, 1x for mid/side, 2x mid/side mute

MS mode:
When the mid/side mode is switched off, both inserts will be 100% passive and will not pass the active MS circuit. When you enable the MS circuit, it will pass the active MS matrix and signals will be encoded to mid (left) and side (right).

Mid / Side mute:
The ‘mute mid’ and ‘mute side’ buttons will let you mute mid or side so that you can listen to just the sum (mid) or the diff (side).

Other MS functions:
When you don’t use the inserts, you can still make use of the mid/side functionality. When the ‘stereo/ms’ button is set to MS, it passes through the active MS circuit. This way you can also listen to just the mid or side channel by muting mid or side.

artnr: MS type C

• insert 1 with mid/side (when in bypass fully passive)
• insert 2 passive
• 3 buttons; 2x for insert, 1x for mid/side

MS mode:
When the mid/side mode on insert 1 is switched off it will be 100% passive and will not pass the active MS circuit. When you enable the MS circuit, it will pass the active MS matrix and signals will be encoded to mid (left) and side (right). Second insert is always passive.

artnr: MS type D

• 2 inserts with blend parallel processing on first insert
• 2 seperate stepped attenuators for wet and dry (range 0 / -33dB and off)
• First insert can be parallel or passive
• Second insert is always passive
• 3 buttons, 2x for insert, 1x for blend/passive mode

First insert:
With the ‘blend’  button you can switch between passive or blend/parallel mode. When in passive mode, it will not pass the active circuit and it will just pass relays.

Second insert:
The second insert is a regular passive insert with just relays.

Wet/dry with 2 controls
Most parallel processing uses one control for blending from wet to dry and uses a potmeter with percentages instead of dB's. The blend circuit we designed uses two separate controls for both wet and dry with stepped switches instead of one potmeter. The first steps on the stepped attenuators have 1 dB per step and the last steps have more course steps, the lowest step is -33dB. The off position mutes the wet or dry signal. This approach means, no channel imbalance, perfect recall, way better control and dB's instead of percentages. Another advantage is that it's pretty much impossible to an AB between parallel processing and regular with one knob because there will always be a gain difference. With 2 controls you can adjust the dry and wet so that it's exactly level-matched compared to the passive mode. You can then simply level-matched AB by pressing the blend button.

Using wet/dry as active gain
This is kinda like a neat hidden feature. It's possible to activate the blend function when insert 1 is not activated. The wet and dry knobs become gain knobs and they will be behave like an active gain in between the inserts. Because the wet control is not passing the insert itself, you can combine the wet/dry gains to add up to 6dB gain.
It's possible to remove this 'hidden feature', the blend function can then not be activated then when the insert is not active. Please let us know if you don't want this at no extra cost.

artnr: Blend type A

• 2 inserts with blend parallel processing on second insert
• 2 seperate stepped attenuators for wet and dry (range 0 / -33dB and off)
• Second insert can be parallel or passive
• First insert is always passive
• 3 buttons, 2x for insert, 1x for blend/passive mode

First Insert:
The first insert is a regular passive insert with just relays.

Second insert:
With the ‘blend’  button you can switch between passive or blend/parallel mode. When in passive mode, it will not pass the active circuit and it will just pass relays.

Wet/dry with 2 controls
Most parallel processing uses one control for blending from wet to dry and uses a potmeter with percentages instead of dB's. The blend circuit we designed uses two separate controls for both wet and dry with stepped switches instead of one potmeter. The first steps on the stepped attenuators have 1 dB per step and the last steps have more course steps, the lowest step is -33dB. The off position mutes the wet or dry signal. This approach means, no channel imbalance, perfect recall, way better control and dB's instead of percentages. Another advantage is that it's pretty much impossible to an AB between parallel processing and regular with one knob because there will always be a gain difference. With 2 controls you can adjust the dry and wet so that it's exactly level-matched compared to the passive mode. You can then simply level-matched AB by pressing the blend button.

Using wet/dry as active gain
This is kinda like a neat hidden feature. It's possible to activate the blend function when insert 2 is not activated. The wet and dry knobs become gain knobs and they will be behave like an active gain in between the inserts. Because the wet control is not passing the insert itself, you can combine the wet/dry gains to add up to 6dB gain.
It's possible to remove this 'hidden feature', the blend function can then not be activated then when the insert is not active. Please let us know if you don't want this at no extra cost.

artnr: Blend type B

• 2 inserts with blend parallel processing on both inserts
• 2 seperate stepped attenuators for wet and dry (range 0 / -33dB and off)
• Both insert will be parallel or passive at once
• 3 buttons, 2x for insert, 1x for blend/passive mode

Both inserts:
With this module both inserts make use of the blend function at the same time. With the ‘blend’  button you can switch between passive or blend/parallel mode. When in passive mode, it will not pass the active circuit and it will just pass relays.

Wet/dry with 2 controls
Most parallel processing uses one control for blending from wet to dry and uses a potmeter with percentages instead of dB's. The blend circuit we designed uses two separate controls for both wet and dry with stepped switches instead of one potmeter. The first steps on the stepped attenuators have 1 dB per step and the last steps have more course steps, the lowest step is -33dB. The off position mutes the wet or dry signal. This approach means, no channel imbalance, perfect recall, way better control and dB's instead of percentages. Another advantage is that it's pretty much impossible to an AB between parallel processing and regular with one knob because there will always be a gain difference. With 2 controls you can adjust the dry and wet so that it's exactly level-matched compared to the passive mode. You can then simply level-matched AB by pressing the blend button.

Using wet/dry as active gain
This is kinda like a neat hidden feature. It's possible to activate the blend function when the inserts themselves are not activated. The wet and dry knobs become gain knobs and they will be behave like an active gain in between inserts. Because the wet control is not passing the insert itself, you can combine the wet/dry gains to add up to 6dB gain.
It's possible to remove this 'hidden feature', the blend function can then not be activated then when the insert is not active. Please let us know if you don't want this at no extra cost.

artnr: Blend type C

• Post blend function with dry always at 100% and wet blend in using a potmeter (used for post blending in saturation or reverb)
• Makes use of 4x XLR connector instead of DB25, this module can only be used in a 2U case.
• 1 button for insert + 1x potmeter for wet blend.

Post blend:
This module only has one insert with an active parallel/blend function and uses XLR connectors for the inserts. The dry signal is always at 100% and the wet signal can be blended in using a potmeter. Please keep in mind that a potmeter has a way higher tolerance then a stepped switch and will have some left/right drift. This insert is only suitable for blending in a bit of reverb or saturation to the end of the chain. For real parallel processing we urge you to use the Blend type A/B/C modules.

artnr: Blend type D

• 2 passive stereo outputs with dedicated pushbutton per output
• bypass gain (-10dB to +10dB potmeter *) compensation on output 1 to bypass inserts and compensate for the gain loss 
• global insert bypass to bypass all inserts
• All outputs are Neutrik goldplated XLR’s

Outputs:
You can choose between the 2 outputs by selecting the corresponding button. It’s also possible to use both outputs at the same time, but keep in mind that this will cause impedance mismatches and so level/sounstage changes. At special request we could add summing resistors to the circuit to avoid this, but keep in mind that you will loose some output gain.

Bypass gain compensation:
The bypass gain compensation has a potmeter and is used to compensate for gain loss when the inserts are bypassed. When you press the 'bypass offset'  button all inserts will be bypassed and the gain compensation becomes active. With the potmeter you can compensate for the gain loss with a range of  -10dB to +10dB (older series had a gain range of -2 to +8dB). This will be really handy for quick level compensated AB'ing between source and master with the press of just one button. The bypass gain compensation can not be used as an active output gain.

Insert bypass:
By pressing the 'insert bypass' button all inserts will be bypassed at once. The button will become red and all insert buttons will be 'greyed out' and no single circuit in the insert section will be active.

artnr: Output type A

• 2 passive or active stereo outputs with dedicated pushbutton per output
• Bypassable active gain with +/-5.5db gain range in 0.5dB per step
• global insert bypass to bypass all inserts
• All outputs are Neutrik goldplated XLR’s

Outputs:
You can choose between the 2 outputs by selecting the corresponding button. It’s also possible to use both outputs at the same time, but keep in mind that this will cause impedance mismatches and so level/sounstage changes. At special request we could add summing resistors to the circuit to avoid this, but keep in mind that you will loose some output gain.

Active gain:
The output of this module is 100% passive but when you engage the active gain button, the active output gain stage comes active. It has a 23 steps gain stage with 0.5dB per step (range +/- 5.5dB). You can use this to drive the output into your AD at the exact gain you want. 

Insert bypass:
By pressing the 'insert bypass' button all inserts will be bypassed at once. The button will become red and all insert buttons will be 'greyed out' and no single circuit in the insert section will be active.

artnr: Output type B

• 2 passive or active stereo outputs with dedicated pushbutton per output
• Bypassable active gain
• Gain range switch for 0.25 or 0.5dB per step (+/- 5.5dB or +/- 2.75dB)
• global insert bypass to bypass all inserts
• All outputs are Neutrik goldplated XLR’s

Outputs:
You can choose between the 2 outputs by selecting the corresponding button. It’s also possible to use both outputs at the same time, but keep in mind that this will cause impedance mismatches and so level/sounstage changes. At special request we could add summing resistors to the circuit to avoid this, but keep in mind that you will loose some output gain.

Active gain:
The output of this module is 100% passive but when you engage the active gain button, the active output gain stage comes active. It has a 23 steps gain stage with 0.5dB per step (range +/- 5.5dB) or by flipping the gain range switch 0.25dB  per step (range +/- 2.75dB). You can use this to drive the output into your AD at the exact gain you want. 

Insert bypass:
By pressing the 'insert bypass' button all inserts will be bypassed at once. The button will become red and all insert buttons will be 'greyed out' and no single circuit in the insert section will be active.

artnr: Output type C

• 1 passive stereo output
• global insert bypass to bypass all inserts
• All outputs are Neutrik goldplated XLR’s

Output:
This is a basic passive output with just one single stereo out with XLR's straight from the last insert inline. 

Insert bypass:
By pressing the 'insert bypass' button all inserts will be bypassed at once. The button will become red and all insert buttons will be 'greyed out' and no single circuit in the insert section will be active. If you don't need this bypass or when the design of the frontpanel will not allow it for space reasons, it can be left out.

artnr: Output type D