User manual RANE HC 6

[. . . ] Use the separate stereo IN jacks when driving a pair of headphones with different program material than what is on the MASTER INPUTS. Connecting a plug into these jacks automatically disconnects that Channel from the Master Input program material. Never connect anything except a Rane power supply to the thing that looks like a telephone jack on the rear of the unit. This is an AC input and requires special attention if you do not have a power supply exactly like the one originally packed with your unit. [. . . ] You do nothing different when hooking up balanced or unbalanced lines. He knows what you are doing so you better watch out. Direct stereo INPUTS allow each stage to be driven separately, from any source. Whenever a plug is inserted into one of these Inputs, the MASTER INPUTS are disconnected from that stage (and only that stage). These are ¼" TRS (tip-ring-sleeve) Input jacks, each accepting both left and right channels. If you plug a regular mono TS (tip-sleeve) into this jack, you will only connect the left channel. If you want to feed this input with an unbalanced mono signal, use a TRS plug and wire the tip and ring together. When using balanced mono sources please consult the factory for the required modification. Hint: this can be accomplished by moving theinternal jumpers by the input jacks as shown on the assembly diagram. To build a cable that will transfer separate left and right cables to a single ¼" TRS, follow the diagram below, connecting all shields. RCA connectors can be substituted for the ¼" connectors. Stereo headphone OUTPUTS allow any headphone with an impedance from 32 to 600 ohms. (Lower and higher impedance headphones may be used; they just won't be very loud. Refer to RaneNote 100, "Understanding Headphone Power Requirements" for headphone loudness listings. ) Remote POWER supply input. The unit is supplied from the factory with a Model RS 1 remote power supply suitable for connection to this input jack. The power requirements of the unit call for an 18 volt AC center-tapped transformer only. Never use a power supply with your unit other than the one supplied or a replacement approved by Rane Corporation. Using any other type of supply may damage the unit and void the warranty. A #6-32 screw used for chassis grounding purposes. See the CHASSIS GROUNDING note below. IMPORTANT NOTE CHASSIS GROUNDING Units with outboard power supplies do not ground the chassis through the line cord. Make sure that these units are grounded either to another chassis which is earth grounded, or directly to the grounding screw on an AC outlet cover by means of a wire connected to the chassis grounding screw. Figure 1. See Above, Direct Stereo INPUTS. Manual-3 OPERATING INSTRUCTIONS PLUG IN Once connected as described in the SYSTEM CONNECTION section on page Manual-2, the HC 6 is ready to drive any impedance headphones from 32 to 600 ohms. [. . . ] There are still only six LEVEL controls. Additional headsets must double up with those already in use. To avoid intolerable volume differences to two listeners on the same Channel of the HC 6, use headphones of the same make and model. The more headphones you connect to it, the less power there is available to each set, and the more strain on the HC 6. [. . . ]