The Shure FP33 3-Channel Stereo Mixer is a field mixer rugged enough to handle the elements and flexible enough for professional working environments. It is suitable for electronic news gathering (ENG), field production (EFP), film, television and recording for sound design. The FP33 features 3 XLR inputs and left/right XLR outputs. The inputs and outputs can be switched between mic and line level signal. There are additional 3.5mm Monitor and Tape connections as well as both 1/4" and 3.5mm headphone outputs.
The FP33 has panning and level controls on channels 1-3, and the headphone monitor dial provides monitoring of either left or right, dual mono, or stereo signal. Both 48V and 12V phantom power are available and two 9 volt batteries provide up to 8 hours of use. The FP33 can also use AC power from a Shure PS20 or PS20E power supply.
The FP33's Mix Bus output jack allows users to cascade multiple FP33 mixers for simultaneous use, and the professional analog VU meters have proven much more durable against the elements than LED, LCD, or fluorescent meters. The VU meters feature timed or toggled backlighting and are multifunctional. There's also a built-in tone oscillator for calibration needs, and the Monitor In and modified Slate Mic/Tape Out jacks can be used for 2-way isolated talk back.
| Connectivity | |
|---|---|
| Inputs | 3 x Balanced XLR inputs |
| Output | 2 x Balanced XLR outputs (1 x L/R) |
| Headphone Outputs |
1 x 1/4" TRS stereo 1 x 3.5mm TRS stereo mini |
| ALT I/O |
1 x 3.5 mm TRS stereo mini - Monitor In 1 x 3.5 mm TRS stereo mini - Tape Out |
| Link Input/Output | "MIX BUS" connection: 3-Pin mini-XLR connector |
| Performance | |
|---|---|
| Input Impedance |
Mic: 1kΩ internal; use with 19 to 600Ω source; -10 dBV clip level Line: 50kΩ internal; use with ≤ 10kΩ source; +36 dBV clip level Monitor: 10kΩ internal; use with ≤ 1kΩ source; +21 dBV clip level |
| Output Impedance |
Mic: 1Ω internal; use with Low-Z source; -31 dBV clip level Line: 150Ω internal; use with 600Ω source; +18 dBm clip level Tape: 2.2kΩ internal; use with >10kΩ source; +3 dBV clip level Headphones: 300Ω internal; use with 8 to 200Ω source; +11 dBV clip level |
| Gain |
Low-Z Mic Input: Line 78 dB, Mic 28 dB, Headphone 89 dB, Tape 66 dB Line: Line 28 dB, Mic -22 dB, Headphone 39 dB, Tape 16 dB Monitor: Headphone 11 dB |
| Frequency Response | 20 to 20,000 Hz ± 2.0 dB (channel controls centered) |
| THD | 0.25% THD @ +4dBm output, 50 to 20,000 Hz |
| Equivalent Input Noise | -127 dBV with 150Ω source, 20 to 20,000 Hz |
| Output Noise |
Master level fully CCW: ≤ -100 dBV, 20 to 20,000 Hz Master level fully CW: ≤ -80 dBV, 20 to 20,000 Hz |
| Common Mode Rejection Ratio | 65 dB @ 100 Hz, -20 dBV input |
| Polarity |
Mic/Line to Mix Bus: inverting all other signal paths are non-inverting |
| Overload Protection | Shorted outputs, even for prolonged periods, cause no damage. Microphone inputs of up to 3 Vrms cause no damage. The Line and monitor inputs can withstand signals of up to 30 Vrms. |
| Output Clipping Level | ≥ -18 dBm @ line output into 600Ω |
| Oscillators |
Tone Oscillator: 1 kHz ±10% Slate Tone Oscillator: 400 Hz ±10% |
| Limiter |
Threshold: adjustable; 0 dBm to +15 dBm Attack time: 1 mS Release time constant: selectable; 100 mS or 1 second Indicator: green when limiting by 1 dB or more |
| Microphone Power |
12V Phantom through matched 680Ω 48V Phantom: through matched 6.8kΩ 12V T (A-B): through matched 180Ω |
| General | |
|---|---|
| LED Indicators |
Input Channel Bi-Color LEDs: Green: Signal presence; visual indication of mix level Red: 6 dB below clipping level Output Peak/Limiter Bi-Color LEDs: Green: Output being limited by 1 dB or more Red: Output peak threshold reached; factory set at +17 dBm; user adjustable from 0 to 17 dBm |
| VU Meter | VU Left/Right Channel Output Level Meters: 0 VU preset at +4 dBm output level |
| Operating Temperature |
Operating: 0 to 60° C (32 to 140° F) Storage: -40 to 85° C (-40 to 185° F) |
| Power |
Internal: two 9V alkaline batteries External: 12-30 VDC to DC In jack; non-polarized |
| Current Drain | Approximately 41 mA (idle) at 18V |
| Battery Life | 8 hours minimum, typical |
| Dimensions (H x W x D) | 2.26 x 7.24 x 6.33" (58 x 184 x 161 mm) |
| Weight | 3.5 lb (1.6 kg) |