User manual TOA KD-1

[. . . ] The pin 1 is ground (shield), the pin 2 cold (low, minus), the pin 3 hot (high, plus). Phantom Power Supply The phantom power switch on channel 1 input permits the user to supply 48V DC through the input connector to a condenser microphone. If phantom power is not required, the switch must be in the "off" position. Description of components and functions of the KD-1 Various descriptions are applied, depending on each manufacturer. [. . . ] The nominal level of the input level control is at the "0" dB position. System Level Control [SYSTEM LEVEL] This control determines the overall volume level of the KD-1 system. Headphone Jack [PHONES] The headphone jack will accept any stereo headphone with 8 ohms impedance, or higher. This jack provides the same signal as the speaker output. When a plug is inserted into the jack, the speaker output is automatically switched off. Power Amp Compression Indicator [COMP] The Comp LED lights when the internal compressor is activated. The compressor is provided to protect the speaker system by compressing the input signal level of the power amplifier when clipping occurs in the output stage. Frequent flashing of the LED is not reason for alarm. However, a constant or steady light indicates that the KD-1 is being overdriven and that the internal power amplifier is possibly "under powered" for that application. The output level of the KD-1 should be decreased until the LED only flashes intermittently. 3 Rear Panel Effect Return Jack [EFF RET] This 1/4" phone jack is used in conjunction with the Effect Send jack to connect an outboard effects device (i. e, delay or reverb) to the KD-1. The Effect Return jack should be connected to the output of the effect. Nominal input level is -20dB with an impedance of 10k ohms. Effect Send Jack [EFF SEND] This 1/4" phonejack is used in conjunction with the Effect Return jack to connect an outboard effects device (i. e, delay or reverb) to the KD-1. The Effect Send jack should be connected to the input of the Effect. Nominal output level is -l0dB with an impedance of 1k ohms. RCA Channel Input [INPUT] The RCA pin input jack is unbalanced, with a nominal level of -- 30dB and an impedance of 100k ohms. Aux Input Jack [AUX IN] The unbalanced 1/4" phone jack have a nominal input level of -20dB and an impedance of 10k ohms. 1/4" Phone Channel Input [INPUT] Phantom Power On/Off switch [PHANTOM] This jack is a standard, unbalanced 1/4" phone jack, with a nominal level of -30dB and an impedance of 100k ohms. When a plug is inserted into the 1/4" input jack, the corresponding RCA pin jack is automatically switched out of the input circuitry. This switch alternately turns "on" and "off the phantom power (48V DC) for the XLR connector assigned to Channel 1. The switch should remain in the off position when a condenser type mic is not in use. Power Switch [POWER] The power switch is a threeposition type with the middle position being the "off' position. The KD-1 should be operated in the switch position which produces the lowest amount of system hum. Balanced XLR Microphone Input [MIC] The XLR-type microphone input connector (channel 1 only) is electronically balanced with a nominal level of -60dB and an input impedance of 1k ohms. Phantom powering is provided for use with condenser-type microphones (see PHANTOM). The microphone input is automatical- AC Power Cord The power cord is of the threewire type with proper grounding facilities built-in. (6ft. ) Caution -- The ground pin should not be removed under any circumstances. If the KD-1 must be used without proper grounding facilities, a suitable grounding adapter should be utilized. [. . . ] Caution -- The KD-1 should never be operated into less than an 8ohm speaker load. 4 Block and Level Diagrams Specifications MIXER SECTION Frequency Response +0, -3dB 20Hz to 20kHz (INPUT to REC OUT) Total Harmonic Distortion Less than 0. 05% at 50 watts into 8-ohm at 1kHz Hum and Noise -80dB below rated output (IHF-A weighted) Total Harmonic Distortion Less than 0. 05% -10dB* 1kHz (REC OUT) Hum and Noise (REC OUT: Open 20Hz to 20kHz) All Level Control Minimum One INPUT Level Control Maximum Equalization --85dB --80dB SPEAKER SECTION Speaker 12"(30cm) two-way speaker Sensitivity 96dB (1 watt/1 meter) Frequency Response 70Hz to 14kHz LOW ±15dB 20Hz Shelving HIGH ±15dB 20kHz Shelving POWER AMPLIFIER SECTION Power Output 50 watts minimum sine wave continuous average power output monaural driving 8-ohm over a power band from 20Hz to 50kHz. The maximum Total Harmonic Distortion (THD) at any power level from 250 milliwatts to 50 watts shall be no more than 0. 5%. 50 watts continuous average sine wave power into 8-ohm will less than 0. 05% THD at 1kHz. Frequency Response +0dB, -2dB 20Hz to 20kHz GENERAL SPECIFICATIONS Power Consumption 105 watts maximum Dimensions (W×H×D) 390mm×523mm×281mm 15 3/8"×20 5/8"×11" Weight 16kg (35 1bs) 5 Specifications INPUT SPECIFICATIONS Actual Input Load Impedance For Use With Nominal Input Level Nominal -30dB (24mV) -60dB (0. 78mV) -20dB (78mV) -20dB (78mV) MAX. [. . . ]