User manual FENDER 400 PEDAL STEEL GUITAR

[. . . ] To conserve the battery, remove the instrument cable from the endpin jack when the unit is not being used. NOTE: Plug an instrument cable into the endpin jack before you plug into the sound equipment. Doing so will prevent loudspeaker damage. BATTERY LOW INDICATOR When plugging into the endpin jack, the LOW BATTERY light will flash momentarily, indicating that the power is on. [. . . ] The affected frequency is variable from 40 to 500 Hz. The NOTCH FILTER is effectively off in the full counter-clockwise position. 3 FISHMAN PREFIXTM PLUS VOLUME CONTROL Controls the overall gain of the 400 PEDAL STEEL GUITARTM. BASS CONTROL This is a boost/cut shelving tone control. The center detent yields a flat response. CONTOUR This is a Wide-range semi-parametric filter. It is used to selectively shape the instrument's tone. The CONTOUR Level slider controls the amount of boost or cut applied to the selected Contour FREQUENCY. The center detent yields a flat response. The Contour FREQUENCY slider determines the frequency band that is boosted or cut by the CONTOUR LEVEL control. The frequency is variable from 250 to 10 kHz. TREBLE CONTROL This is a boost/cut shelving tone control. The center detent yields a flat response. BRILLIANCE CONTROL This is a resonant style boost/cut filter. This "cavity resonance" feedback can be dealt with by putting the instrument and speaker out of phase or by adding equalization. USING THE PHASE SWITCH TO REDUCE FEEDBACK. Inverting the PHASE switch will put the instrument and speaker out of phase with each other, cancelling the low frequency feedback. If you move from your position on stage more than a few feet, you may have to invert the PHASE switch again to maintain an out of phase relationship between the mic'ed instrument and speaker. Continued . . . 9 FISHMAN PREFIXTM PLUS PHASE, Continued from Page 9 Here's why: A typical guitar has a cavity resonance of about 100 Hz. This is the frequency that generally feeds back when the guitar and speaker are in phase. 100 Hz has a wavelength of about 11 feet. Phase inverts 180° for every 1/2 a frequency's wavelength. In this case, 1/2 the wavelength is about 5 1/2 feet. If you set your PHASE switch to eliminate cavity resonance (out of phase) and then move 5 1/2 feet towards or away from the speaker, you will effectively put the mic'ed guitar/speaker relationship at 100 Hz back in phase; in the line of fire for low frequency feedback. The PHASE switch on the ONBOARD BLENDERTM in effect electronically "moves" your instrument's position relative to the speaker by inverting the phase 180° every time you flip it. B. USING THE NOTCH FILTER TO REDUCE FEEDBACK Notching out instrument cavity resonance will eliminate the low frequency feedback problem completely. The advantages to using notching equalization are: · The physical distance from the speaker will no longer be a factor for potential low frequency feedback. [. . . ] · The mic'ed instrument/speaker can remain in phase, maintaining a more natural and balanced response. 10 ONBOARD ACOUSTIC GUITAR SYSTEM SPECIFICATIONS Nominal Input Level: Input Overload: Input Impedance: Output Impedance: Nominal Output Level: THD: Signal to Noise Ratio: -20 dBV (20 Hz - 20 kHz)-2 dBV 20 M Ohms Less than 3. 5 k Ohms -12 dBV Less than . 04 %, -20 dBV input 77 dB (A weighted referred to nominal -20 dBV input) Less than 3. 5 mA 9V Alkaline battery (estimated 160 hours continuous use with low battery indicator at 6. 5V) 40Hz - 500 Hz (-15 dB) ± 12 dB at 60 Hz ± 3 dB at 350 Hz ± 12 dB at 10 kHz ± 3 dB at 2. 4 kHz ± 12dB (adjustable from 250 Hz to 10 kHz) Q = 0. 5 ± 9 dB at 10 kHz ± 3 dB Bandwidth 7 kHz Current Drain: Power Supply: Notch Filter Range: Bass Control Range: Treble Control Range: Contour Control Range: Brilliance Control Range: All specifications subject to change without notice. 11 LIMITED WARRANTY INSTALLATION BY A QUALIFIED PROFESSIONAL REPAIRMAN IS STRONGLY RECOMMENDED. FISHMAN TRANSDUCERS WILL NOT BE RESPONSIBLE FOR ANY DAMAGES THAT MAY RESULT FROM IMPROPER INSTALLATION. The FISHMAN PREFIXTM PLUS ACOUSTIC GUITAR SYSTEM is warranted to function for a period of One (1) 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. [. . . ]