The MF-103 12 Stage Phaser is
all-analog, Bob Moog-designed. A phaser is a type of comb filter,
so-called because its frequency response has several dips and peaks,
like the teeth of a comb. As the phaser response sweeps back and forth
across the frequency spectrum, the harmonics of the audio input signal
are alternately increased and decreased. This produces the classic
phaser "whooshing" sound. Each of the four performance parameters may
be controlled smoothly and continuously by panel knob, expression
pedal, or external control voltage. Audio input and output signals may
be set to any instrument or line level.
Housed in a rugged steel and hardwood
enclosure, the MF-102, like other Moogerfooger instruments, has the
classic good looks, versatility, and high sound quality of the
well-known vintage Moog synthesizers.
Features
- Audio In: 1/4" phone jack - accepts any
instrument-level or line-level audio signal from -16 dBm to +4 dbm. .
Input impedance is one megohm.
- Audio Out: 1/4" phone jack -4 dBm nominal output level. Output impedance is 5,000 ohms.
- Aux Out: 1/4" phone jack - -4 dBm nominal output level. +8 dBm absolute maximum output level. Output impedance is 5,000 ohms.
- Rate: 1/4" TRS- accepts Moogerfooger or equivalent expression pedals or CV.
- Amount: 1/4" TRS- accepts Moogerfooger or equivalent expression pedals or CV.
- Sweep: 1/4" TRS- accepts Moogerfooger or equivalent expression pedals or CV.
- Resonance: 1/4" TRS- accepts Moogerfooger or equivalent expression pedals or CV.
- Sweep In: provides a means of applying an
external +/- 2.5 volt control signal to the second 6-section phasing
circuit, in place of the LFO. Input impedance is 50,000 ohms.
- LFO Out: 1/4" phone jack - delivers the LFO
waveform (triangular wave; +/- 2.8 volts) for use by other
voltage-controlled devices. Output impedance is 600 ohms.
- Rate: rotary control, which varies LFOâ??s frequency over a 250:1 range.
- Amount: rotary control, which adjusts the amount by which the LFO output varies the phaser sweep.
- Sweep: rotary control, which moves the phaser frequency response over a six-octave range.
- Resonance: rotary control, which adjusts the height and sharpness of the peaks of the phaser frequency response.
- Drive: rotary control, which adjusts the gain of the audio input.
- Output Level: rotary control, which balances the phaser signals with the bypassed signal.
- Lo-Hi: rocker switch, which chooses between the low LFO range (0.01 Hz to 2.5 Hz) and the high LFO range (1.0 Hz to 250 Hz).
- Level: a three-color LED that is used to set the drive control.
- LFO, a LED that indicates the LFO rate.
- Bypass: a two-color LED that tells whether the ring modulator is on or bypassed.
- On Bypass: a rugged, smooth-acting 'stomp switch.'
Other Features
- Power supply is included: order 110v for use in US or Canada
- 220v available by special order.
- Dimensions: 9" x 6" x 2-1/2"
Additional Notes
The MF-103 produces two comb-filter
responses. They are called 6-Stage and 12-Stage, because of the number
of phase-shifting circuits that are used internally. The 6-Stage mode
has three dips in its frequency response, while the 12-Stage mode has
six dips. These two modes have distinctly different sound qualities. In
addition, the MF-103 features a variable feedback circuit which
increases the resonance, or 'depth' of the phaser sound.
