DUTCH IM1.2 User manual

DuTCH audio IM1.2(s) Insert Matrix manual

DuTCH audio IM1.2(s) manual
(v1.1 03-10-2019)
Thank you for purchasing the DuTCH audio mastering Insert Matrix IM1.2(s). In this manual
e ill explain ho this device orks and ho to use it. Since this is not really a beginner’s
device, e ill skip the basics and focus on it’s functions. We ill go from the inputs (left side),
to the inserts (middle) and to the outputs (right side), basically ho the device handles signals.
The IM1.2 is available in 2 versions, the IM1.2 and the IM1.2s. The only difference is the
output section. More on this, check the output section in this manual.
Input:
Active gain:
The input is 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. n 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.
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. n 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.
Inserts:
Insert 1 and 2:
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. t will first pass insert 1 and then it goes into insert 2.
When you push the ‘s ap 1 /2’ button, it will swap the order of the inserts. So instead of 1>2
it will become 2>1.
Insert 3 and 4 (mid/side):
nsert 3 and 4 can be used for Mid/Side processing. When set to stereo, it will be 100%
passive, when set to MS, it will pass the active mid/side circuit.
Mid Side:
When the ‘stereo/ms’ button is engaged, both inserts 3 and 4 will work in MS mode. Left
channel is Mid (sum), Right channel is Side (diff).
Insert 5 and 6:

This is a 100% passive insert section with just relays. nsert 5 is a regular passive insert. With
insert 6 you can swap the order of insert 6 from insert 6 to pre insert 1, so it basically becomes
insert 0. When you push the ‘6 pre/post’ button, this is what will happen:
6 pre/post off: inputs > 1>2>3>4>5>6> outputs
6 pre/post on: inputs > 6>1>2>3>4>5> outputs
Output:
Insert ypass:
When you press the ‘ins bypass’ button, all inserts will be bypassed at once. The bypass button
becomes red and all other buttons will be ‘greyed out’. This way, the input goes directly to the
output with nothing inline except for some relays.
IM1.1
ypass offset:
When you push the ‘bypass offset’ button, it will bypass all inserts and the active gain stage
‘bypass offset’ comes active. The monitor offset will allow you to change the bypass gain to
make up for the processing of the inserts. This way you can A/B between the analog
processing and level-matched bypassed signal. The gain range is set from -2dB to +8dB done
with a potmeter instead of a stepped switch for a more precise adjustment. And since this is
just an AB function no recall is needed.
IM1.2s
Active output gain:
The output is passive with just relays, but by pushing the ‘active gain’ button you will enable
the active gain stage which enables you to change the output gain to your liking. n 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.
Rearpanel:
Inputs:
The M1.2(s) has balanced inputs. Both inputs consist of gold-plated Neutrik XLR’s.
Inserts:
The M1.2(s) has 6 balanced inserts connected on the back with industry standard Tascam
DB25 analog connectors. Each connector holds 2 inserts corresponding with the frontpanel
numbering.

Note: Be careful ith DB25 tascam standard premade cables. The digital AES/EBU cables like
the Hosa AES-803T have their XLR’s connected in the rong ay hich s aps send/return.
Though it’s an easy fix (s ap all XLR male and female), you might ant to look at this carefully.
Outputs:
On the rearpanel you will find the output with balanced gold-plated Neutrik XLR’s.
Power:
The ‘po er’ input is for connecting the external power-supply to the M1.2.
Technical:
Hardware:
This device is built around mostly passive circuits, but some sections need to be active, but
always with transparency in mind. The sturdy frontpanel-switches have, depending on their
function, 2 color leds for visual feedback. All relays are high sensitive, long-life (15.000.000
cycles) Omron Relays.
Stepped switches are military grade Blore Edwards for long life and really nice mechanical feel.
n and output connectors are gold plated Neutrik and industrial DB25 connectors for inserts.
Active circuits make use of analog devices, THAT and Burr Brown drivers. The mid/side circuit
is based on the well-known circuit from Wayne Kirkwood, but with additions/modifications.
The external PSU is build around long-life industrial Meanwell SMPS’s which run with way less
noise and are way more efficient then linear PSU’s. Both the relays/leds and active circuit
PSU’s are running on their own separate PSU.
When this device is used in passive mode, so without active stages, it’s 100% passive and only
relay-contacts are inline. This means it’s basically a straight wire.
Pushswitch labeling:
To have some extra visual feedback on the push-switches you can put labels under the switch-
covers. You can simply, but carefully, remove the switch cover with a small screwdriver and
put something like a transparent dymo letratag sticker on the white plastic piece inside the
switch-cover.

Specifications:
Maximum gain passive: >+24dBu
Maximum gain active gain: +24dBu
Noise level passive: >118dB(a)
Noise level active: >116dB(a)
Stereo crosstalk: >110dB(a)
Stereo crosstalk mid/side: >80dB(a)
THD passive: 0.00042% (AD/DA limitations)
THD active: 0.00045%
nput voltage 100 to 240VAC 50/60HZ.
Power consumption minimum 3 watt
Power consumption maximum 20 watt
(Power consumption depends on the amount of inserts, input, output etc activated)
Unit size: standard 1u 19 inch, depth 25cm
Weight: approx 2kg
Specifications subject to change because always improving
© DuTCH.audio 2019
Handmade in Holland on Solarpower
[email protected]dio
https://dutch.audio
Phone: [phone]