User manual PEAVEY KB-A 30

[. . . ] Biamping greatly increases the sound output as the amplifiers work much more efficiently. The signal passes through a specially-designed electronic crossover which feeds the two amplifiers. a 40-watt amp powers the woofer , and a dedicated 10-watt amp powers the tweeter. Biamping greatly increases the available headroom and enables the KB/A 30 sound output to go beyond what you would expect. [. . . ] To utilize this system, a stereo plug (tip/ring/sleeve) to a "Y" cord must be used. The tip portion of the 1/4" stereo jack serves as the signal send (output) while the ring portion will return the processed signal to the system. Since this is a stereo jack configuration, the first click on the jack may be used as a pre power amp output with a mono 1/4" plug if desired. This first click will not disturb the signal flow to the remainder of the system as it is fed into the power amp section. NOTE: If the second click of the out/in jack is utilized without returning any signal to the system from an effects device the power amp will be disabled. MONITOR INPUT A 1/4" phone jack input is provided to be used as a monitor input. The red pilot light (LED) will illuminate indicating power is being supplied to the unit. (120V PRODUCTS ONLY) For your safety, we have incorporated a three-wire line (mains) cable with proper grounding facilities. If it is necessary to use the equipment without proper grounding facilities, suitable grounding adapters should be used. Less noise and greatly reduced shock hazard exists when the unit is operated with the proper grounded receptacles. PREAMP SECTION The following preamp specs are measured at 1 kHz with the master EQ set flat at 0 dB, all gain switches in the out position, nominal signal levels are with channel level controls set at five. CHANNEL ONE INPUTS Low-Z Input Impedance: 5k ohms Nominal input Level: -30 dBV, 32 mV RMS Minimum input Level: -40 dBV, 10 mV RMS High-Z Input Impedance: 5k ohms Nominal input level: -30 dBV, 32 mV RMS Minimum input level: -40 dBV, 10 mV RMS CHANNEL TWO and CHANNEL THREE INPUTS Input impedance: 22k ohms Nominal input level: -21 dBV, 90 mV RMS Minimum input level: -40 dBV, 10 mV RMS CHANNEL FOUR INPUT Input impedance: 10k ohms Nominal input level: 0 dBV, 1 V RMS Minimum input level: -25 dBV, 56 mV RMS EFFECTS PATCH : (STEREO JACK TIP) Function: Low level effects send Load impedance: 1k ohms or greater Nominal output: -10 dBV, 316 mV RMS PRE EQ PATCH: (STEREO JACK RING) Function: Low level effects return Impedance: High-Z, 10k ohms Input level: -10 dBV, 316 mV RMS (Switching stereo jack provides patch output to patch input connection when not used. ) The following specs measured at nominal setting, all phone jack inputs terminated with 47k ohms. FREQUENCY RESPONSE (Channel input/preamp output at 1 V RMS level) +0, -3 dB, 20 Hz to 20 kHz PREAMP DISTORTION (Channel in/preamp out, 20 Hz to 20 kHz at 1 V RMS) Less than . POWER AT CLIPPING (TYPICALLY) 40 W RMS into 8 ohms/low channel 10 W RMS into 8 ohms/high channel (Both channels driven, 5% THD, 3. 3%, 7 W RMS/high channel into 8 ohms, 5 kHz to 20 kHz (Typically below 0. 2%) FREQUENCY RESPONSE +0, -1 dB, @ 30 W RMS/low channel into 8 ohms, 50 Hz to 2 kHz +0, -1 dB, @ 7 W RMS/high channel into 8 ohms, 5 kHz to 20 kHz HUM and NOISE Greater than 90 dB below rated power POWER CONSUMPTION (DOMESTIC) 100 W at 120 V AC, 50/60 Hz CROSSOVER Fixed, 18 dB/octave, 3. CHANNEL ONE INPUTS Low-Z Input Impedance: 5k ohms Nominal input Level: -30 dBV, 32 mV RMS Minimum input Level: -40 dBV, 10 mV RMS High-Z Input Impedance: 5k ohms Nominal input level: -30 dBV, 32 mV RMS Minimum input level: -40 dBV, 10 mV RMS CHANNEL TWO and CHANNEL THREE INPUTS Input impedance: 22k ohms Nominal input level: -21 dBV, 90 mV RMS Minimum input level: -40 dBV, 10 mV RMS CHANNEL FOUR INPUT Input impedance: 10k ohms Nominal input level: 0 dBV, 1 V RMS Minimum input level: -25 dBV, 56 mV RMS EFFECTS PATCH : (STEREO JACK TIP) Function: Low level effects send Load impedance: 1k ohms or greater Nominal output: -10 dBV, 316 mV RMS PRE EQ PATCH: (STEREO JACK RING) Function: Low level effects return Impedance: High-Z, 10k ohms Input level: -10 dBV, 316 mV RMS (Switching stereo jack provides patch output to patch input connection when not used. ) The following specs measured at nominal setting, all phone jack inputs terminated with 47k ohms. FREQUENCY RESPONSE (Channel input/preamp output at 1 V RMS level) +0, -3 dB, 20 Hz to 20 kHz PREAMP DISTORTION (Channel in/preamp out, 20 Hz to 20 kHz at 1 V RMS) Less than . [. . . ] Care should be taken so that objects do not fall and liquids are not spilled into the unit through the ventilation holes or any other openings. This product should be used only with a cart or stand that is recommended by Peavey Electronics. Exposure to extremely high noise ]levels may cause a permanent hearing loss. Individuals vary considerably in susceptibility to noise induced hearing loss, but nearly everyone will lose some hearing if exposed to sufficiently intense noise for a sufficient time. [. . . ]