McIntosh MA230 Especificaciones

STEREOPREAMP-AMPLIFIERMA230TABLE OF CONTENTS11335911111112121212142020GENERAL DESCRIPTIONTECHNICAL DESCRIPTIONMechanical SpecificationsElectrical Spec

LF (Low Frequency Filter)LOUDNESSUse the LF filter to reduce low frequencynoises created by a turntable, record changer,or vibration acoustically coup

INSTALLATIONThe MA230 can be installed in furniturecabinets, custom built installations or pro-fessional relay racks. If the unit is to be usedon a sh

4. Cut out the rectangular opening.5. Secure the mounting strips to the in-side of the panel.In the hardware package are 4 flat headscrews and 8 filli

CONNECTINGAC CONNECTIONSThere are three AC outlets on the backpanel of the MA230. The black receptacleshave a maximum power rating of 350 wattstotal.

gram source should be twisted together andthe ground wire from each source can bewound or twisted in with these cables. Toavoid hum, make sure the gro

DIRECTIONALFM ANTENNAROTATOR8 OHM SPEAKERS SHOWNTO 12OVAC OUTLET13GROUND

If a phono cartridge requires less than47,000 ohms load impedance, a resistor canbe added across the terminals of the car-tridge to achieve the correc

source of sound should appear to be directlyin front of you. Alternate the PHASE switchbetween 0° and 180°. If the sound is not di-rectly in front of

(See page 15 ADJUSTING FOR SPECIALEFFECTS.)5. Set the LF filter switch to FLAT. (Seepage 15 ADJUSTING FOR SPECIAL EF-FECTS.)6. Set the LOUDNESS switch

as for TAPE input.1. Set the TAPE MONITOR switch toMONITOR.2. Turn the MODE SELECTOR switch toMONO (L+R).3. Set the HF cutoff filter switch to FLAT.(S

RESPONSE IN DB20100-10-2020 100 1KC 10KC 20KC0-5-10-15-20-25-3018BASS AND TREBLE CONTROL RESPONSEFREQUENCYRUMBLE AND HIGH FREQUENCY FILTERSRESPONSE IN

LOUDNESS CONTROLFREQUENCYEQUALIZATION CURVES2520151050-5-10-15-20-2520 100 1KC 10 KC 20 KCFREQUENCY1920151050-5-10-15-20RESPONSE IN DBRESPONSE IN DB20

Your Mclntosh MA230 tuner will give you many years of pleasantand satisfactory performance. If you have any questions concern-ing the operation or mai

LABORATOR Y INC .2 CHAMBERS STREET, BINGHAMTON, N. Y.Mods in U.S.A.Phone-Area Code 607-723-5491AA133-183

MA230 PREAMP-AMPLIFIERGENERAL DESCRIPTIONThe new Mclntosh MA230 presents twooutstanding "FIRSTS" for your home stereolistening enjoyment.. .

each channel of the tone control section. Theentire preamplifier has low noise, low distor-tion, and is not affected by normal roomtemperature variati

couples the output tube cathodes into thetransformer. Six db of negative feedback isproduced in the output stage with this circuit.Twenty db of negati

Frequency RangeAt 30 watts output both channels.+ 0, -0.5db 20 cycles through 20,000cycles.+0, -3db 15 cycles through 70,000cycles.Output Impedance4 o

FRONT PANEL INFORMATIONINPUT SELECTORFigure 1. MA230 Front Panel.Select any of six program sources with theMA230 INPUT SELECTOR switch.1. AUX: Use the

Turn the MODE SELECTOR to:1. L TO L & R: connects the "left" input toboth loudspeakers.2. R TO L & R: connects the "right"

Figure 7. TREBLE Control.COMP (Compensation)Use the COMP switch to correct for phonoequalization introduced by the recordingprocess. The recording ind