Mackie ProFX8v2 Owners Manual - Page 9

Owner's Manual Phantom Power Most modern professional condenser mics require 48V phantom power, which lets the mixer send low-current DC voltage to the mic's electronics 5 through the same wires that carry audio. (Semi-pro condenser mics often have batteries to accomplish the same thing.) "Phantom" owes its name to an ability to be "unseen" by dynamic mics (Shure SM57/SM58, for instance), which don't need ­external power and aren't affected by it anyway. 7 The ProFX mixer's phantom power is globally c­ ontrolled by the phantom power 9 8 26 switch (meaning that phantom power for all mic inputs is turned on and off together.) Never plug ­s­ ingle-ended (unbalanced) 10 micro­phones or ribbon microphones into the mic input jacks if phantom power is on. 12 27 Do not plug instrument outputs into the mic input jacks with phantom power on ­unless you know for certain it 13 is safe to do so. 14 15 16 6. Line / Hi-Z Switch [ProFX8v2 / ProFX12v2] 17 To connect a guitar directly to the mixer without using a DI Box, press this switch in first; then connect the output from the guitar to channel 1's 1⁄4" TRS input. The input impedance is optimized for direct 18 connection and high-frequency fidelity is assured. In the out position, channel 1's 1⁄4" TRS input becomes a line input just like the other mono line inputs. 19 To use guitars or other instruments on other channels, you will need to use an external DI box first. Without the DI box - or if this switch is not pressed in - guitars may sound dull and muddy. 20 21 22 7. Line Inputs Hi-Z Input (Channel 1 Only) [ProFX8v2 / ProFX12v2] In addition to accepting balanced mic or line-level signals using an XLR connector, ProFXv2 Series mixers may also accept 1/4" line-level signals driven by balanced or unbalanced sources. These 1/4" jacks share circuitry (but not phantom power) with the mic preamps. To connect balanced lines to these inputs, use a 1/4" Tip-Ring-Sleeve (TRS) plug. "TRS" stands for Tip-Ring-Sleeve, the three connection points available on a stereo 1/4" or balanced phone jack or plug. 25 23 23 23 24 Mono Channels Stereo Channels Channels 1-2 on ProFX8v2 Channels 1-4 on ProFX12v2 Channels 1-8 on ProFX16v2 Channels 1-14 on ProFX22v2 Channels 1-22 on ProFX30v2 Channels 3-8 on ProFX8v2 Channels 5-12 on ProFX12v2 Channels 9-16 on ProFX16v2 Channels 15-22 on ProFX22v2 Channels 23-30 on ProFX30v2 Owner's Manual 9