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Fishman DUAL PARAMETRIC D.I. Manual

2-band eq / preamp / direct box
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DUAL
PARAMETRIC
D.I.
2-BAND EQ / PREAMP / DIRECT BOX

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Summary of Contents for Fishman DUAL PARAMETRIC D.I.

  • Page 1 ’ DUAL PARAMETRIC D.I. 2-BAND EQ / PREAMP / DIRECT BOX...

  • Page 2: Packing Information

    If you have any questions or problems, feel free to contact our PRODUCT INFOR- MATION LINE at 978-988-9665. The Fishman Dual Parametric D.I. is essentially three devices in one. It is a high-quality electrically balanced D.I. for use on stage. It is a high input impedance instrument preamp that can be used with piezo input signals as well as other types of input signals such as microphones and magnetic pickups.
  • Page 3 EQ / PREAMP / DIRECT BOX W H H A A T T I I S S A A P P A A R R A A M M E E T T R R I I C C E E Q Q U U A A L L I I Z Z E E R R ? ? An equalizer is a filter, or tone control, designed to shape sound- either to remove or de-emphasize unwanted frequencies, or to boost specific frequencies.
  • Page 4 There is, of course, a boost/cut knob, joined by an octave bandwidth knob and a center frequency knob (the Fishman Dual Parametric D.I. has a switch that works in conjunction with the frequency knob to select the center frequency). Here are the parameters you can control with a parametric equalizer such as the Fishman Dual Parametric D.I.

  • Page 5: Battery Operation

    POWER The Dual Parametric D.I. is powered at all times when using an AC adapter. Always be sure to use only the Fishman 910-R or Roland PSA Series AC adapters. BATTERY OPERATION The 1/4” Input jack is also the power switch for the Dual Parametric D.I. when using a 9 volt battery and a mono instrument cable.

  • Page 6: Top Panel

    DUAL PARAMETRIC D.I. TOP PANEL The front panel is divided into three sections: Band One, Band Two, and the input stage controls and indicator. Band One and Band Two operate identically, and the input section sets the level and phase of the incoming signal.
  • Page 7 EQ / PREAMP / DIRECT BOX VOLUME The Volume knob sets the level of the incoming signal. When an instrument is plugged into the Fishman Dual Parametric D.I., its signal may be too weak or too overpowering. If the signal is too weak, it needs boosting to overcome any noise inherent in downline equipment.
  • Page 8 DUAL PARAMETRIC D.I. PHASE When a signal is out of phase with another signal, it can cause cancellation, which (as its name implies) results in something missing. The opposite is true when two signals are in phase; the combined signals can be solid or absolutely overpowering, depending on the sounds and how "in phase"...
  • Page 9 B B O O O O S S T T / / C C U U T T K K N N O O B B The tone controls on many amps or stereos only boost or cut their assigned frequency band. Fishman's Dual Parametric D.I. Boost/Cut knob not only combines boosting and cutting...
  • Page 10 DUAL PARAMETRIC D.I. OCTAVE SELECTOR Equalizers generally express the range of their effect in terms of octaves instead of specific frequencies. An octave is the distance between one frequency and another that is twice as high (100 Hz and 200 Hz, for example).
  • Page 11 EQ / PREAMP / DIRECT BOX FREQUENCY RANGE MULTIPLIER SWITCH This switch operates in conjunction with the Frequency knob, selecting the range that the knob operates in. It allows the Frequency knob to provide finer resolution than if the knob had to cover the entire 20 Hz to 20kHz range in one revolution.

  • Page 12: Frequency Knob

    DUAL PARAMETRIC D.I. FREQUENCY KNOB This knob selects the frequency center for the Band. The EQ's greatest effect takes place at this frequency center, with decreased effect toward the outer reaches of the bandwidth.

  • Page 13: Side Panel

    EQ / PREAMP / DIRECT BOX BAND TWO Band Two is configured identically to Band One. All controls operate in the same manner as the corre- sponding controls of Band One. SIDE PANEL Inputs and outputs are conveniently located on the side panel, making them easily accessible, whether the Dual Parametric D.I.

  • Page 14: Ground Lift Switch

    The Dual Parametric D.I. is designed to be powered by a 9-volt alkaline battery or an AC adapter. This jack accepts an AC adapter such as Fishman's 910-R or Roland's PSA Series. Note that using an AC adapter does not recharge a battery inside the Dual Parametric D.I.

  • Page 15: Eliminating Feedback

    P.A. or monitors and then back through the microphone again. The result is a high- pitched ringing or squealing sound. Here's a way to eliminate it, using the Fishman Dual Parametric D.I.: Plug your pickup-equipped instrument or microphone into the Dual Parametric D.I., and the D.I.into your mixer.
  • Page 16 DUAL PARAMETRIC D.I. SUPPRESSING AC POWER HUM Sometimes low-frequency hum caused by AC power, poorly grounded pickups, or a multitude of other reasons creeps into your system. (In the U.S., this is at 60 Hz, but elsewhere in the world it may be at 50 Hz.) If you can't eliminate the hum by using ground lifts, switching polarity, or any of the other means recommended by the manufacturer of your electrical equipment, then try this: If your instrument's pickup is introducing low hum, then plug it into the Dual Parametric D.I.
  • Page 17 EQ / PREAMP / DIRECT BOX Increasing Intelligibility In Speech And Vocals. Recording or amplifying vocals through a P.A. system can present a variety of challenges. A common one is rumble from vibrations reaching the micro- phone through the mic stand. Others include the overbearing booms produced when a person sounds the letters "B"...
  • Page 18 USING THE DUAL PARAMETRIC D.I. AS A DIRECT BOX Because the Fishman Dual Parametric D.I. has an impedance buffer and a Volume control, it can be used as a direct box between high-impedance signals (such as those from electric basses, electric guitars, microphones, etc.) and low-impedance inputs such as those found on many mixers.
  • Page 19 EQ / PREAMP / DIRECT BOX COMBINATION EQs COMBINATION EQ USING BOTH BANDS USING BOTH BANDS Sometimes it's necessary to treat a couple of frequency bands simultane- ously. The Dual Parametric D.I. is per- fect for this. In some cases, the bands may be very close together, requiring fairly narrow bandwidths (setting the Octave control to less than .5).
  • Page 20 DUAL PARAMETRIC D.I. If you want to boost the low-end response for a bass drum while de- emphasizing any ringing, you can sep- arately boost and cut using Band One and Band Two as follows (the frequen- cies are merely examples-experiment with your own combinations):...
  • Page 21 EQ / PREAMP / DIRECT BOX Similarly, if you want to cut thump out of the low end and deeply reduce an offensive, though narrow, band of highs, you can do so. Note that the bandwidth of one Band can be razor- sharp while the other is wide.
  • Page 22 DUAL PARAMETRIC D.I. Sometimes you want to boost a broad range, but at the same time you want to de-emphasize a band somewhere within that range. This can be done by setting each Band separately and then combining them. Notice how this combination of overlapping boosting and cutting creates a broad boost with a notch cut out of the middle.

  • Page 23: Specifications

    EQ / PREAMP / DIRECT BOX SPECIFICATIONS Nominal Input Level -20 dBV Input Overload (20 Hz to 20 kHz) 8 dBV Input Stage Impedance 10 MOhm Output Type Electronically balanced XLR and unbalanced 1/4” Output Impedance 220 Ohm Nominal Output Level -20 dBV Gain Control Range -Infinity to +6dB...

  • Page 24: Limited Warranty

    Year from the date of purchase. If the unit fails to function properly within the warranty period, free repair and the option of replacement or refund in the event that FISHMAN is unable to make repair are FISHMAN’s only obligations. This warranty does not cover any consequential damages or damage to the unit due to misuse, accident, or neglect.

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