: .:~ ..... • . . ~~R.~ Model 4300 Stereo 2+Quadradial4 Receiver MARANTZ CO., INC. ·P.O. BOX 99'SUN VALLEY, CALIFORNIA·91352 A WHOLLY-OWNED SUBSIDIARY OF SUPERSCOPE INC.
I I I I I I I I I I I I I I I TABLE OF CONTENTS Connecting the 4300 Source Device Remote Speakers Speaker Phasing Speaker Placement 2 4 4 Front Panel Features Mode Switch Dimension SO Decoder Balance Controls Selector Switch Bass, Mid and Treble Controls Monitor Switch Main and Remote Spkr Switches Power Switch Front and Rear Phones Jacks Loudness Switch Low Filter Switch Hi Filter Switch Meters Tuning FM Muting Switch Volume Dolby Switch Record Level (Ll (R) Play Cal.
LIST OF ILLUSTRATIONS 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
I I I I I I I I I I I I I I I I I I I Figure 1. Rear Panel Connection Facilities and Adjustments CONNECTING THE 4300 RIGHT REAR SPEAKER - or GND or NEG or COMM orO The 4300 can be used as a stereo or 4-channel Receiver. When using the 4300 as a stereo unit, the POWER MODE Switch on the rear panel should be placed in the 100W x 2 mode. The instructions contained in this manual are to be followed for both stereo or 4-channel operation; however, for stereo operation, the front channels alone will apply. 1.
MAil SI(AI(8l SYSTEM Ilff'£AT WIIHG AS FOR FfOIIY ~ SYSTtM Figure 2. 5.
I I I I I I I I I I 11. If phono is selected, put on a stereo record. If FM is selected, tune to a stereo broadcast. 4-ehannel Discrete 4-channel playback devices (0-8 cartridge player, 4-channel reel-to-reel player, CD-4 discrete disc demoduiator, etc.) may be connected to the CD4!AUX, TAPE MONITOR 1 or TAPE MONI· TOR 2 input jacks. 12. Increase the VOLUME control to a comfort~ able listening level.
SPEAKER PHASING To assure the best 4-channel or Stereo separation and frequency response, the following tests will verify that all four speakers are correctly phased. 1. After the speakers are connected to the 4300, place all four speakers in the center of the room. 2. Set MODE Switch at MONO. Play a record (or radio or tape) with strong bass tones, at a low volume level. Center the FRONT L-R and REAR L-R BALANCE controls. Set FRONT-REAR BALANCE control at extreme FRONT position. 3.
R~ • • • LR RR RR RR • RR • RF Figure 4.
FRONT PANEL FEATURES rear channel signals are varied by the DIMENSION control. Speakers are driven as shown in Figure 8. MODE SWITCH MONO When the MODE Switch is in the MONO position, all input signals are summed. Speakers are driven as shown in Figure 5. Use the MONO position for A) phasing speakers and B) playing a monaural source, such as TV audio, AM radio or monaural records through all four channels, C) setting up BALANCE controls.
Figure 9. Front Panel Controls and Jacks DIMENSION SELECTOR SWITCH The DIMENSION control is operative only when the MODE Switch is set to the VARI-MATRIX position. This control optimizes the 4-channel VARI-MATRIX effect. The SELECTOR Switch selects the program source for listening or recording. The switch can select any of six sources: AM, FM, PHONO, CD-4/AUX, TAPE 1 and TAPE 2.
MONITOR Switch in the TAPE 2 position. During recording, the MODE Switch should be in DECODER DISCRETE, VARI-MATRIX or positions. This applies the source signal, unchanged, directly to the tape outputs. sa To record a discrete 4-channel source on a 2channel recorder, put the MODE Switch in the 2 CH position. Leave the MONITOR Switch in the SOURCE position while recording.
desired station. Then, rock the TUNING knob slightly back and forth until the maximum reading is obtained on the SIGNAL-STRENGTH Meter. The FM TUNING Meter is not used for AM. produced after the record and playback Dolby process has been completed. FM: Set the SELECTOR Switch to "FM" and tune to the desired station. Then, slowly rock the TUNING knob back and forth until the FM TUNING Meter points to the center scale po istion.
REAR PANEL FEATURES PHONO JACKS These two jacks are intended for use with magnetic cartridges requiring a standard 47000 Ohm resistive load. If a hum is heard ~hen playing a record, try reversing the polarity of the turntable power plug. If this is ineffective, connect a separate ground wire from the turntable or record changer to the CHASSIS GROUND binding post of the 4300. CD-4/AUX JACKS These jacks are for connection of any 4-channel high level equipment source.
I I I I I I I I I I I I I I I I I I l i I However, an outdoor antenna will provide better reception. Two single wires are required to make an AM outdoor antenna. First, connect one end of a single wire to the AM ANTENNA terminal on the rear panel, and the other end at a very high position outdoors. Next, connect the other single wire between the "G" terminal and an earth ground (such as a water pipe). (Refer to Figure 11.
Terminals work as shown in Figure 13. 1) Press terminal in 2) Insert speaker wire Release terminal 3) TAPE RECORDING Instructions for connecting a recorder and playing back a tape are given in "SOURCE DEVICES", page 4. CONNECTION TO AC OUTLET With the front panel POWER pushswitch "OUT" plug the line cord into an electrical outlet supplying the proper voltage. CAUTION: DO NOT PLUG YOUR MODEL 4300 INTO A DC OUTLET, AS SERIOUS DAMAGE WILL OCCUR. To record, se.
BASIC DOLBY PROCESS circuit with the recorder. 6. Switch off the 400Hz TONE. The Dolby system increases the level of low-level, mid- and high-frequency signals during recording and reduces the level of these signals by an identical amount during playback. As a result, the playback signal is identical to the original soUrce signal, but the level of background noise generated by the tape recorder is greatly reduced.
Since the calibration is extremely stable and should not have to be repeated (except to periodically check it), we suggest that you mark the settings of your recorder's output level controls with a felt-tipped pen. Doing so will enable you to easily reset the controls if they are inadvertantly moved. 4. Commence recording. 5. Adjust the recorder's record level controls to deflect the recorder's meters to OVU. 6. Record the tone for approximately 30 seconds. PROCEDURE FOR RECORD CALIBRATION 7.
Mark the calibration positions on the recorder's record and playback level controls to avoid the necessity of re-calibrating after making a nonDolby recording. ratio may be obtained by putting the DOLBY Switch in the "DOLBY FM" position. The rear panel DOLBY FM PRESET LEVEL controls are factory-adjusted. Do not change the position of these controls. IMPORTANT: It will be necessary to re-calibrate the Dolby levels when a change in tape speed has been made or when a different brand or type of tape is used.
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TECHNICAL DESCRIPTION GENERAL Figure 14 is a block diagram of the model 4300 Stereo 2 + Quadradial 4 Receiver showing main functional elements and input and output signal routing. PHONO INPUT jacks are provided for the front pair of channels. FUNCTIONAL DESCRIPTION FRONT END FM antenna signals are applied through a balun transformer to the antenna coil which drives a field-effect transistor RF amplifier.
Following the AM I F amplifier, the AM detector recovers the audio modulation and provides this signal to the SELECTOR Switch. main amplifier section. The driving impedance to the balance high filter section is satisfactorily reduced by NFB. The AM tuner and I F amplifier incorporates an automatic gain control circuit which maintains a constant level of all stations in the AM band. POWER AMPLIFIER These amplifiers permit phono signals of up to 100 millivolts to be handled without overloading.
INSTALLATION OF WALNUT CABINET The optional walnut cabinet may be installed in the following manner. If you have an optional plug-in decoder, un-plug it from the chassis. If you do not have an optional plug-in decoder, remove the cover plate from the bottom of the chassis by removing the four screws. Place the rear end of the Marantz unit into the front end of the walnut cabinet and slide it into place.
