Intellijel Quadratt 1U User manual
Headphones 1U Manual
Headphones 1U
Stereo Headphone Amplifier
Manual Revision: 2019.08.07
Headphones 1U Manual
Compliance
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that
may cause undesired operation.
Changes or modifications not expressly approved by Intellijel Designs, Inc. could
void the user’s authority to operate the equipment.
Any digital equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates,
uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio
communications.
This device meets the requirements of the following standards and directives:
EMC: 2014/30/EU
EN55032:2015 ; EN55103-2:2009 (EN55024) ; EN61000-3-2 ; EN61000-3-3
Low Voltage: 2014/35/EU
EN 60065:2002+A1:2006+A11:2008+A2:2010+A12:2011
RoHS2: 2011/65/EU
WEEE: 2012/19/EU
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Headphones 1U Manual
Installation
This module is designed for use within an
Intellijel-standard 1U row, such as
contained within the Intellijel 4U and 7U
Eurorack cases. Intellijel’s 1U specification
is derived from the Eurorack mechanical
specification set by Doepfer that is
designed to support the use of lipped rails
within industry standard rack heights.
Before Your Start
Intellijel Eurorack modules are designed to be used with a Eurorack-compatible case and power
supply. We recommend you use Intellijel cases and power supplies.
Before installing a new module in your case, you must ensure your power supply has a free
power header and sufficient available capacity to power the module:
● Sum up the specified +12V current draw for all modules, including the new one. Do the
same for the -12 V and +5V current draw. The current draw will be specified in the
manufacturer's technical specifications for each module.
● Compare each of the sums to specifications for your case’s power supply.
● Only proceed with installation if none of the values exceeds the power supply’s
specifications. Otherwise you must remove modules to free up capacity or upgrade your
power supply.
You will also need to ensure your case has enough free space (hp) to fit the new module. To
prevent screws or other debris from falling into the case and shorting any electrical contacts, not
leave gaps between adjacent modules, and cover all unused areas with blank panels. Similarly,
do not use open frames or any other enclosure that exposes the backside of any module or the
power distribution board.
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Headphones 1U Manual
You can use a tool like ModularGrid to assist in your planning. Failure to adequately power your
modules may result in damage to your modules or power supply. If you are unsure, please
contact us before proceeding.
Installing Your Module
When installing or removing a module from your
case always turn off the power to the case and
disconnect the power cable. Failure to do so may
result in serious injury or equipment damage.
Ensure the 10-pin connector on the power cable
is connected correctly to the module before
proceeding. The red stripe on the cable must line
up with the -12V pins on the module’s power
connector. Different modules use different ways to
indicate the -12V pins. Some may be labelled with
“-12V;” a white stripe next to the -12V pins; the
words “red stripe;” or some combination of these.
Additionally, some modules may have shrouded
headers, thus preventing backward connections.
Most modules will come with the cable already
connected but it is good to double check the orientation. Be aware that some modules may have
headers that serve other purposes so ensure the power cable is connected to the right one.
The other end of the cable, with a 16-pin
connector, connects to the power bus board
of your Eurorack case. Ensure the red stripe
on the cable lines up with the -12V pins on
the bus board. On Intellijel power supplies the
pins are labelled with the label “-12V” and a
thick white stripe:
If you are using another manufacturer’s
power supply, check their documentation for
instructions.
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Headphones 1U Manual
Once connected, the cabling between the module and power supply should resemble the
picture below:
Before reconnecting power and
turning on your modular
system, double check that the
ribbon cable is fully seated on
both ends and that all the pins
are correctly aligned. If the pins
are misaligned in any direction
or the ribbon is backwards you
can cause damage to your
module, power supply, or other
modules.
After you have confirmed all the
connections, you can reconnect
the power cable and turn on
your modular system. You should immediately check that all your modules have powered on
and are functioning correctly. If you notice any anomalies, turn your system off right away and
check your cabling again for mistakes.
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Headphones 1U Manual
Front Panel
1. L Input
Eurorack-level audio sent
into this jack is scaled by the
HEADPHONE Level Knob
[4] and sent to the stereo
HEADPHONE Out jack [3] .
2. R Input
Eurorack-level audio sent
into this jack is scaled by the
HEADPHONE Level Knob
[4] and sent to the stereo
HEADPHONE Out jack [3] .
NOTE 1: The L Input jack is
normalled to the R Input
jack. If nothing is connected to the R Input jack, then a mono signal fed into the L Input
jack will feed both channels in the headphones.
NOTE 2: If you have version2 of the Headphones1U module and are using its
rear-panel 3-pin Link connector to monitor audio from another module, please see
“Using The 3-Pin Link Connector” to learn more.
3. HEADPHONE Output
This is a stereo 1/4″ output intended primarily for headphones. Its volume level is set
with the HEADPHONE Level knob [4] .
4. HEADPHONE Level Knob
Controls the level of the headphone output.
CAUTION: Always be mindful of volume levels when listening through headphones.
Keep this level as low as required. Your future self will thank you.
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Headphones 1U Manual
Version 1 vs Version 2
There are two versions of the Headphones 1U module. Version 2, which replaced Version 1 in
August 2019, features the addition of a 3-pin Link connection on its rear panel, as seen below.
Using The 3-Pin Link Connector (version 2 only)
Version 2 of the Headphones 1U Module features a 3-pin Link connector on the rear panel. This
is an input connector, which allows you to send audio directly into the Headphones1U module
by connecting it to the 3-pin Link output connector of another module.
Using this connector, you can send audio from either a Stereo LineOut1U or Mixup directly into
the Headphones1U, without using the front panel jacks. This is particularly convenient for
setting up a headphone feed that duplicates the audio being sent to the main output (which
usually drives a power amp or mixer).
IMPORTANT! When using the 3-pin Link connection, remove the Headphones1U module’s
rear-panel JP1 jumper and put it in a safe place . This jumper is what normals the
Headphones1U module’s Left input to its Right input when the Link connection is not used.
Since the module feeding it (i.e., Stereo LineOut1U or Mixup ) has its own Left-to-Right
normaling, 3-pin Link connections require removal of this jumper to achieve expected operation
and optimum sonic fidelity.
If you’re using the 3-pin Link cable to feed the Headphones 1U module and the JP1 jumper is
removed, it’s front panel input jacks are still active, however they are independently
addressable. That is, a signal appearing at the Headphone1U’s Left Input feeds only the Left
headphone channel, and a signal appearing at the module’s right input feeds only the right
headphone channel.
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Headphones 1U Manual
The following diagrams show how to connect a v2 Headphones 1U module to either a
StereoLineOut1U module or a Mixup module’s CHAIN OUT connector using the included
3-pin Link cable:
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Headphones 1U Manual
Technical Specifications
Version 2
Width
10 hp
Maximum Depth
37 mm (43 mm with 3pin cable inserted)
Current Draw
36 mA @ +12V
36 mA @ -12V
Version 1
Width
10 hp
Maximum Depth
34 mm
Current Draw
32 mA @ +12V
32 mA @ -12V
Page 9
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