Harman Kardon A401 Owners Manual - Page 10

Other Controls Fuses By far the most frequently used controls are the FUNCTION, VOLUME, and POWER controls, but each of the controls we haven't yet mentioned has a specific purpose and value. Listen to their effect as we describe them. TREBLE Raises (clockwise) or lowers (counterclockwise) high frequency content in program material on both channels simultaneously. Neutral position is 12 o'clock. BASS Same effect as TREBLE control, except works on low frequencies. CONTOUR Works in conjunction with VOLUME control to increase bass energy at low volume settings. Progressively less effect as volume level is increased. The CONTOUR control has no effect at VOLUME control settings beyond 12 o'clock. TAPE-MON Admits program from any "high level" source (usually tape recorder) connected to TAPE MONITOR receptacles. It does not affect signal appearing at the TAPE OUTPUT receptacles. Thus, the use of the TAPE MONITOR switch does not disturb the recording process of whatever source the FUNCTION switch is set to. (Note: If the rear panel TAPE MONITOR inputs are unoccupied and the TAPE MONITOR switch is depressed, no sound will be heard regardless of the position of the FUNCTION switch. The same will be true if the equipment connected to the TAPE MONITOR inputs is off). TAPE MONITOR also allows for connection of signal processing devices. LO CUT A filter to reduce low frequency content of any program material. Rumble from your turntable (if present) or other low frequency problems can be effectively reduced. PHONES Two receptacles for headphones for private listening. Does not automatically defeat speaker systems. Headphones can be used whether your speakers are "on" or "off". FUNCTION Selects program for playback through system. Same signal appears at TAPE OUT. SPKRS-1, SPKRS-2 Permits either or both of two speaker systems to be driven. To permit private listening, these controls are independent of the signal appearing at the PHONES receptacles. SPEAKER FUSES [ - LEFT RIGHT1 2 5A 3AG 2 5A 3AG FUSE 2A 3AG Se A-401 Specifications Power Output: Power Bandwidth: Frequency Response: Square Wave Rise Time: Square Wave Tilt: Total Harmonic Distortion: Intermodulation Distortion: Noise: Sensitivity: Damping Factor: Input Impedance: Tone Control: Dimensions: Weight: Three fuses are provided to protect the A-401. Two of these are the speaker fuses and labeled as such. They work to protect the amplifier circuitry from external short circuits or other conditions which would cause excessive current to be drawn through the amplifiers. If one of your speakers stops reproducing sound, first check the connections for that speaker, then check the speaker fuse for that channel. Replace the fuse after correcting any short circuit conditions (wire strands touching the wrong terminals are the usual cause). The remaining fuse protects the entire amplifier from excessive currents through the AC power line. Should any fuse blow: THE REPLACEMENT FUSES MUST BE OF PRECISELY THE SAME TYPE AS THAT SPECIFIED ON THE REAR PANEL. USING ANY OTHER FUSES WILL NOT PROTECT THE A-401. SERIOUS DAMAGE TO ITS CIRCUITRY MAY RESULT. 20 WATTS MIN. RMS PER CHANNEL. Both channels driven into 8 ohms from 20 Hz to 20 kHz, with less than 0.5% THD. From less than 10 Hz to greater than 35 kHz at less than 0.5% THD into 8 ohms, both channels driven simultaneously at 10 watts per channel. From less than 10 Hz to greater than 80 kHz at less than 0.5% THD into 8 ohms, both channels driven simultaneously at 1 watt per channel with electrically flat tone controls. Less than 2 microseconds. Less than 5% at 20 Hz. Less than 0.3% from 250 milliwatts to 20 watts RMS, both channels driven simultaneously into 8 ohms from 20 Hz to 20 kHz. Less than 0.2% at rated power. Less than 52 dB residual (unweighted). 120-150 millivolts, AUX, TAPE MON; 2.5 -3 millivolts, PHONO. Greater than 30. Greater than 20k ohms AUX. Greater than 10k ohms TAPE MON 47k ohms PHONO. Plus and minus 12 dB at 50 Hz; Plus and minus 14 dB at 10 kHz. 13"W x 103/4" D x 514/ " H. 33 cm. W x 27.5 cm. D x 13.4 cm. H. 131/2 lbs./6.2 kg.