Overview: The Mackie ProFX4v2 is a professional
4-channel compact mixer with two mic preamps.
The Mackie ProFXv2 series mixers includes a new ReadyFX effects engine that
instantly delivers your choice of 16 effects. In addition, the ProFX4v2 offers
2-band equalization for each input, and a stereo 5-band Graphic EQ for the main or monitor mix. The mixer
features a solid steel chassis, with rugged ABS side panels. It is powered by a
12-volt power supply (supplied). Included with the mixer is easy-to-use Tracktion
recording software (via free download).
Main Inputs: The ProFX4v2 offers the following main inputs:
- Vita Mic Preamps (Ch. 1-2): Mackie's all-new Vita
microphone preamps are designed for live sound with higher fidelity and
tremendous headroom. Both channels 1 and 2 are equipped with female XLR
connectors that will accept balanced mics or line level inputs from almost
any type of source. Both mic inputs feature 48-volt phantom power from a
single 2-way switch.
- Mono Line Inputs (Ch. 1-2): In addition to female XLRs,
both channel 1 and 2 inputs have 1/4" jacks that will accept line level
signals from balanced or unbalanced sources. These 1/4" jacks share
circuitry, but not phantom power with the mic preamps.
- Line/Hi-Z Input (Ch. 1 only): The channel 1 1/4" input
features a Line/Hi-Z switch that allows you to connect a guitar to the input
without a DI box. With the switch pressed in, the input impedance is
optimized for direct connection. In the out position, channel 1's 1/4" input
becomes a line input like channel 2.
- Stereo Line Inputs (Ch. 3-4): This pair of 1/4" jacks may be
driven by stereo or mono balanced or unbalanced sources. They may be used with
just about any professional or semi-pro instrument, effect, or tape player. If
you are connecting a mono source, you should use the left (mono) input, and
the mono signals will appear on both sides of the main mix. The level for
the stereo line inputs is adjusted with a single potentiometer.
Setting Gain: Each input channel has a gain knob that lets
you adjust the input sensitivity. Nearly every level control on the mixer
features a "U" symbol to indicate "Unity Gain," or no change in the signal
level. For line-level signals, you can adjust the input sensitivity between
-20dB and +30dB. For mic signals (from the XLR connectors), the range of
adjustment is 0dB to +50dB. Level Set LEDs are provided to let you know if any
of the channels are distorting. A low-cut switch on the mono channels cuts bass
frequencies below 100 Hz at a slope of 18dB per octave. On the stereo channels
(3&4), the range of gain control is -20dB to +20dB, with no Level Set LEDs or
2-Band Equalization: Each of the inputs has 2-band
equalization, with "low shelving" at 80Hz and "high shelving" at 12kHz. Shelving
means the circuitry boosts or cuts all frequencies past the specified frequency.
EQ knobs are provided for Channel 1, Channel 2, and Channels 3/4 together, and
provide 15dB of boost or cut at 80Hz and 12kHz. The "U" symbol indicates the
center position (Unity Gain) where there is no change in the signal level.
Tape In/Out: The ProFX4v2 offers both Tape Inputs and
Outputs. The stereo unbalanced RCA inputs allows you to connect a CD or MP3
player or other line-level source. The level of the input signal can be
controlled with a separate Tape Level knob. The stereo unbalanced RCA outputs
let you record the main stereo mix onto a hard disk recorder or automatic CD
Main Meters: The mixer's main peak meters include two
columns of 12 LEDs, with three colors to indicate signal level ranges: green
(-30dB to +3dB), yellow (+6 to +15), and red (+20 OL).
Main & Headphone Outputs: The ProFX4v2 analog mixer is fitted with
1/4" main outputs, as well as a 1/4" headphone output:
- Main Outputs: Two 1/4" connectors provide stereo line-level
signals from the main mix for connecting to inputs of
your powered speakers or main power amplifier.
- Headphone Output: A single 1/4" TRS jack supplies the
output to a pair of stereo headphones. It is the same signal that is sent to
the main and tape outputs. A separate volume control knob is provided.
Internal Effects: The powerful new ReadyFX effects engine
uses a floating-point DSP to deliver 16 effects that can be used to enhance any
performance. A rotary dial and 2-digit numeric display let you choose between
the following effects:
|1. Bright Room ||5. Warm Hall ||9. Chorus ||13. Delay 1 (Fast) |
|2. Warm Lounge ||6. Concert Hall ||10. Chorus + Reverb ||14. Delay 2 (Medium) |
|3. Small Stage ||7. Plate Reverb ||11. Doubler ||15. Delay 3 (Slow) |
|4. Warm Theater ||8. Cathedral ||12. Echo ||16. Pan Delay |
Aux Monitor/FX Sends: The ProFX4v2 features Aux Monitor and
Aux FX Sends:
- Aux Monitor Send: Stage monitors allow the musician to hear themselves
clearly on stage. The monitor mix may be carefully adjusted in level using the
Aux Mon controls on Channels 1, 2, and 3/4. These tap a portion of each channel's signal to provide a 1/4"
TRS output to feed external stage monitors. The controls are off when fully
turned down, deliver unity gain (no change in level) at the center detent,
and provides up to 15dB of gain when fully turned up.
- FX Send: The Aux FX knobs tap a portion of each
channel's signal to provide a FX mix feeding the internal FX processor, and
to feed an external FX processor via the FX Send 1/4" connector. The
controls are off when fully turned down, deliver unity gain (no change in
level) at the center detent, and provides up to 15dB of gain when fully
turned up. Effects are added to the main mix by increasing the level of the
"FX to Main" knob. You can also add FX to the monitor mix by adjusting the
"FX to Mon" knob.
Graphic Equalizer: The ProFX4v2 offers a 5-Band Graphic EQ
for the left/right main mix or for the monitors. The EQ affects the line-level
outputs, but not the headphone or tape outputs. It can be bypassed at the press
of a button, if needed. Each slider lets you adjust the level of its frequency
band with up to 15dB of boost or cut. The center detent indicates no change in
level (0 dB). The frequency bands are: 80Hz, 250Hz, 800Hz, 2.5kHz, and 8kHz.
Applications: The Mackie ProFX4v2 is great for Live sound mixing, houses
of worship, clubs, gyms, banquet halls, conference and board rooms, studio and
field recording, video post-production, multimedia applications, broadcast, and