Mackie ProFX22 Owner's Manual - Page 26

Appendix B: Connections XLR Connectors Mackie mixers use 3-pin female XLR connectors on all microphone inputs, with pin 1 wired to the grounded (earthed) shield, pin 2 wired to the high (hot or positive polarity) side of the audio signal and pin 3 wired to the low (cold or negative polarity) side of the signal. See Figure A. Use a male XLR-type connector, usually found on the nether end of what is called a "mic cable," to connect to a ­female XLR jack. SHIELD 2 HOT • Unbalanced send/return circuits. When wired as send/return "Y" connector, a 1⁄4" TRS jack or plug is connected tip to signal send (output from mixer), ring to signal return (input back into mixer), and sleeve to ground (earth). 1⁄4" TS Phone Plugs and Jacks TS stands for Tip-Sleeve, the two connections available on a mono 1⁄4" phone jack or plug. See Figure C. COLD 3 1 SHIELD 1 Figure A: XLR Connectors COLD 3 2 HOT 1 3 2 SHIELD COLD HOT 1⁄4" TRS Phone Plugs SLEEVE and Jacks SLEEVE TIP TRS stands for Tip-Ring-STlIeP eve, the three ­connections available on a stereo 1/4" or b­ alanced phonTIPe jack or plug. See Figure B. SLEEVE TRS jacks and plugs are used in several ­d­ ifferent applications: RING SLEEVE SLEEVE RING TIP Figure C: TS Plug SLEEVE TIP SLEEVE TIP TIP SLEEVE TS jacks and plugs are used in many different RING SLEEVE SLEEVE RING TIP ­applications, always unbalanced. The tip is connected to the audio signal and the slTeIPeve to ground (earth). Some examples: RING TIP • Unbalanced microphones SLEEVE • Electric guitars and electronic instruments • Unbalanced line-level connections • Speaker connections Don't use guitar cords for speaker cables! They're not designed to handle speaker-level signals and could overheat. TIP Figure B: TRS Plug RING TIP SLEEVE • Balanced mono circuits. When wired as a balanced connector, a 1⁄4" TRS jack or plug is connected tip to signal high (hot), ring to signal low (cold), and sleeve to ground (earth). • Stereo headphones, and rarely, stereo microphones and stereo line connections. When wired for stereo, a 1⁄4" TRS jack or plug is connected tip to left, ring to right and sleeve to ground (earth). Mackie mixers do not directly accept 1-plug-type stereo micro­phones. They must be separated into a left cord and a right cord, which are plugged into two mic preamps. RCA Plugs and Jacks RCA-type plugs (also known as phono plugs) and jacks are often used in home s­ tereo and video equipment and in many other applications (Figure D). They are u­ nbalanced and electrically identical to a 1⁄4" TS phone plug or jack. See Figure C. Connect the signal to the center post and the ground (earth) or shield to the surrounding "basket." SLEEVE TIP SLEEVE TIP Figure D: RCA Plug Figure E: Does not appear in this owner's manual, due to a contractual obligation, but performs nightly at the downtown Woodinville Cocoa Rooms and Tea Bar 26 ProFX16 and ProFX22