Pioneer qm 800 owners manual
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Extracted text from pioneer qm 800 owners manual (Ocr-read)
Page 1
First. let us thank you for the confidence you have shown us in purchasing the Pioneer quadraphonic power amplifier. model OM-800. This amplifier is designed to serve in a 4-channel stereo installation, together with a 4-channel preamplifier, 4 speaker systems and one or several program sources. Engineered for highest sound fidelity, it will open up a whole new world of "environmental sound." Please read the following instructions carefully to assure that all connections are made correctly and that the OM- 800 will reveal its true performance quality. FEATU RES DIRECT COUPLING OF ALL STAGES Direct coupling of all amplifier stages greatly improves phase characteristics and permits an extremely wide fre- quency response down to near-DC. A load-regulated power supply unit is employed, and output power is higher than will ever be required. LEVEL METERS FOR ALL FOUR CHANNELS To obtain optimum sound balance in a 4-channel system, four separate level meters are provided. Moreorrer, the meters'sensitivity can be adjusted in three stages (0, -10 and -20 dB) to permit accurate readings at all volume levels. ADJUSTABLE lNPUT SENSITIVITY As the power amplifier's input sensitivity can be adjusted in 6dB steps (at 0.5, 1 and 2 volts), it is easy to match with any preamplifier LINE VOLTAGE AND FUSE CHANGING LINE VOLTAGE AND FUSE To remove the fuse, turn the fuse cap located on the line voltage selector in the direction of the arrow. Then remove the fuse plug from the unit. Put the fuse plug back so that the proper line voltage marking can be seen through the cut in the edge of the plug. When- ever the position of the selector is changed, check the rating of the fuse. A 2-ampere is to be used for either 220V or 24OY operation and a 4-ampere fuse for 110V, I20V, 130V operation. If the rating of the fuse is conect, replace cap. FUSE REPLACEMENT If the fuse blows, remove the fuse cap and replace the fuse with a new one. SPECIAL HIGH-RANGE SPEAKER OUTPUTS ln addition to the four normal. full-range speaker terminals. a set of high-range speaker outputs are provided. The OM-800 can be used as an exclusive high-range amplifier in a multi-amplifier installation. PERFECT PROTECTION OF OUTPUT STAGE TRANSISTORS AND SPEAKERS The output transistors are protected from damage (in the case of overload or short-circuits in the speaker leads) by a dual system of relay and DC drift voltage detector circuits. The latter also guard against possible speaker damage by DC current. UNIOUE PIONEER EXTERIOR DESIGN The front panel is attractive as well as logically laid out. With its natural wooden cabinet, the OM-800 matches other Pioneer hi-f i components perfectly. cotN FUSE CAP FUSE FUSE PLUG SOCKET Take oft the fuse cap by turning it with a coin, etc. in the direction indicated by the arrow mark.
Page 2
r'IOI\IEER COMPOS ITION OF 4. CHANNEL STEREO SYSTEM 4 CHANNEL STEREO TAPE DECK To compose a 4-channel stereo system, the QM-800, a solid state Quadraphonic Power Amplifier, can be combined with a 4-channel tape deck, a 4-channel preamplifier, and four speaker systems as shown in Fig. 1. When the QM-800 is combined with a tape deck, AM/FM stereo tuner, a turntable, four speaker systems, and a quad- raphonic preamplifier equipped with a quadralizer circuit (Pioneer QC-800, for instance) as shown in Fig. 2, a 2- channel program source can be reproduced in a high degree of a 4-channel performance. If an electronic crossover net- work (separately available, Pioneer SF-500 or SF-700.) is installed as shown in Fig. 3, a 2-way multi-amplifier system can be set up. TAPE DECK AM/FMSTEREO TUNER TURNTABLE 4 CHANNEL STEREOPREAMPLI FI E (oc-800) ELECTRONICCROSSOVERNETWORK(sF-500) {sF-700} TURNTABLE Fis. 1 rroOO..--":^^o""?:OOo."rr??? SPEAKER SYSTEMS TAPE DECK PREAMPLI FIER (sc-700, sc-1001 FIIEIEE-rllttlO O? C O. OOOO o o O O ro FN FF OO FFI-Ir-lllttlt-tto or O r??OO.^.OO () r I O O r-o rrrr SPEAKER SYSTEMS Fis.2 Fis.3