User manual FISHMAN DUAL PARAMETRIC D.I.

[. . . ] O W N E R ' S M A N U A L DUAL PARAMETRIC D. I. 2-BAND EQ / PREAMP / DIRECT BOX DUAL PARAMETRIC D. I. Thank you for your purchase of a Fishman Product. Please read these instructions carefully. If you have any questions or problems, feel free to contact our PRODUCT INFORMATION LINE at 978-988-9665. It is a high-quality electrically balanced D. I. [. . . ] Even at 20kHzapproximately the top limit of human hearing-a bandwidth of . 015 octaves translates to only 300 Hz. Narrow bandwidths are great for selectively chopping out feedback frequencies, 60 Hz hum, etc. Wider bandwidths mean that the equalizer affects a wider range of frequencies. 10 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. Here are the multiplier switch's three settings and the Frequency knob's corresponding ranges: X1 20 Hz to 200 Hz X 10 200 Hz to 2kHz X 100 2kHz to 20kHz 11 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. 12 EQ / PREAMP / DIRECT BOX BAND TWO Band Two is configured identically to Band One. All controls operate in the same manner as the corresponding 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. is used with other signal processors, mixers, amplifier effects loops, or as a direct box. 1) 1/4" Input 2) 1/4" Output 3) Ground Lift Switch 4) XLR Output Jack 5) AC Adapter Jack 1/4" INPUT This 1/4" unbalanced input jack accepts the signal from guitars, basses, keyboards, acoustic pickups, microphones, and any other amplifiable instrument. In addition, it accepts signals from other audio gear, such as the send from an amplifier's effects loop, a compressor/limiter's side-chain output, or a mixer's effects buss. 1/4" OUTPUT This 1/4" unbalanced output jack sends the output from the Dual Parametric D. I. to other gear or amplification or further processing. Its signal is identical to that found at the XLR output. 13 DUAL PARAMETRIC D. I. GROUND LIFT SWITCH When connecting the XLR Output to other gear, it's possible that it can create a secondary path to ground, introducing hum to the sound. Using the GND LIFT (Ground Lift) switch disconnects the secondary ground path, removing the ground loop and the hum that comes from it. XLR OUTPUT This balanced XLR output provides a low-impedance, high-level output that's ideal for sending to a mixing console or pro-level audio processors. Its signal is identical to that found at the 1/4" output. 9V POWER INPUT 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. BATTERY ACCESS The battery access door, located on the underside of the Dual Parametric D. I. , opens with a fingernail, guitar pick, or screwdriver. The cover lifts off, exposing the battery compartment. Always use a 9-volt alkaline battery (Duracell MN1604, Eveready No. 522, or equivalent) for best power; carbon batteries do not provide reliable enough power and can leak, damaging the Dual Parametric D. I. When installing a battery, make sure the connectors are aligned correctly in reference to the "+" and "-" indications shown inside the Dual Parametric D. I. After installing the battery, replace the cover plate. without its cover plate in place. 14 EQ / PREAMP / DIRECT BOX APPLICATIONS ELIMINATING FEEDBACK Feedback is usually one frequency or a narrow frequency band that recirculates from a microphone (or pickup) through the P. A. [. . . ] NOTE: Never plug a speaker output from an amplifier into the Dual Parametric D. I. The high level will damage the Dual Parametric D. I. 's circuitry and may also result in damage to the amplifier. 18 EQ / PREAMP / DIRECT BOX COMBINATION EQs COMBINATION USING BOTH BANDS EQ USING BOTH BANDS Sometimes it's necessary to treat a couple of frequency bands simultaneously. In some cases, the bands may be very close together, requiring fairly narrow bandwidths (setting the Octave control to less than . 5). [. . . ]