Intellijel Quad Manual 

Installation Intellijel Eurorack modules are designed to be used with a Eurorack-compatible case and power supply. Before Your Start Before installing a new module in your case you must ensure your case’s power supply has 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 you have enough free space (hp) as well as free power headers in your case to fit the new module. 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. The pins are indicated with the label -12V, a white stripe next to the connector, the words “red stripe”, or some combination of those indicators. Page 1

Most modules will come with the cable already connected but it’s a good idea to double check the orientation before proceeding. Be aware that some modules may have headers that serve other purposes so ensure the 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 words “-12V” and a thick white stripe. If you are using another manufacturer’s power supply, check their documentation for instructions. Once connected, the cabling between a module and power supply should resemble the photo shown to the right. 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. Page 2

Operation Intellijel’s Quad Inverter contains four voltage inverters [A - D] — each with an input jack [1] on top and an output jack [2] beneath it. Each output is a buffered inversion of the input signal. For example, if you send +3V DC to the input jack, the inverted output will be -3V DC. Similarly, if you send a waveform to an input, the output will be an inverted copy of that waveform. This is particularly useful when you want a control voltage (such as an LFO or envelope) to inversely impact the parameter it’s modulating. The output of each inverter is normalled to the inverter immediately below it. So if you patch a signal into Inverter A and patch nothing into Inverter B, then the signal is passed through from the output of A to the input of B, where it’s inverted (again), making it identical to the signal appearing at the input of Inverter A. Similarly, if you also leave the Inverter C input open, then the input to Inverter A is inverted a third time, making the output of Inverter C identical to the output of Inverter A. NOTE: Quad Inverter does not function as a stand-alone gate inverter (since inverting a gate is not actually the same thing as inverting a voltage). For this you need a logic inverter, such as the Intellijel Plog. You may, however, feed an output from a Quad Inverter into a Triatt or Quadratt to offset the voltage such that gate inversion occurs. Page 3

Technical Specifications Width 2 hp Maximum Depth 29 mm Current Draw 4 mA @ +12V 17 mA @ -12V Page 4