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A 23 Amplifier

Owner’s Guide

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Содержание Halo A 23

Страница 1: ...A 23 Amplifier Owner s Guide ...

Страница 2: ...unpacking your new amplifier inspect it thoroughly for possible shipping damage If you see any contact your Parasound dealer right away Be sure to save and store both the inner and outer cartons and the packing inserts for possible future transport To save room for storage you can cut the seams on the bottom of the cartons and flatten them Keeping Records for Future Reference Record the serial num...

Страница 3: ...ERNAL DC SOURCE FOR AUTOMATIC ON OFF _________________________________________________________________________________ CONNECTING THE A 23 TO TRIGGER ANOTHER COMPONENT _________________________________________________________________________________ UNDERSTANDING THE INDICATORS ON THE A 23 _________________________________________________________________________________ CONNECTING THE AC POWER COR...

Страница 4: ...ring use Do not stack the A 23 with other components inside a cabinet unless you use a fan to circulate and exhaust the warm air that builds up between them Rack Mounting Your Parasound A 23 If you plan to mount the A 23 into a standard 19 wide equipment rack you will need to purchase the optional Parasound HRA 2 Rack Mount Adapter With its four feet removed the A 23 chassis and front panel height...

Страница 5: ...to the Balanced and Unbalanced Lines in the Technically Speaking section for additional information about why we recommend using balanced lines What You ll Need One pair of balanced interconnect cables with XLR connectors A preamplifier or surround controller with balanced connectors Before Connecting Leave the A 23 s AC cord disconnected until you have made all other connections to prevent any su...

Страница 6: ...that all your cables are long enough so they are not strained or stretched once they are connected Make sure the Balanced Unbalanced switch on the A 23 is in its Unbalanced down position To Connect Plug one end of the cable into the Unbalanced Right Channel Input jack on the A 23 Plug the other end of this cable into the unbalanced right channel output jack on your preamplifier or a channel from y...

Страница 7: ...ned or stretched once they are connected To Connect Plug one end of the cable to the right channel Loop Out jack on the A 23 Plug the other end of this cable to the right channel input jack on the other power amplifier Repeat steps 1 and 2 for the left channel CONNECTING THE LOOP OUT JACKS ON THE A 23 TO ANOTHER POWER AMPLIFIER S INPUTS 4 1 2 YOU SHOULD KNOW These jacks eliminate the need for two ...

Страница 8: ...a plugs 1 4 spade lugs or bare wire Refer to Bare Wire Speaker Termination in the Technically Speaking section for information about bare wire termination What You ll Need Two lengths of speaker wire AWG 16 or thicker with banana plugs spade lugs or bare wire Loudspeakers or a speaker selector box Before Connecting Remove power to all the components in your audio system To Connect Insert one wire ...

Страница 9: ...his cable into the desired output channel on the preamplifier or surround controller Do not make any connection to either Left Channel Input jack on the A 23 To Connect To the Speaker Insert the wire with the ridge or other marking into the red Right positive speaker terminal on the A 23 This is the positive speaker terminal in bridged mono Insert the wire without the ridge or other marking into t...

Страница 10: ...witch to its upper Audio position What You ll Need An active audio source connected to the left or right Input jack on the A 23 Before Connecting Remove power to all the components in your audio system Make sure the Auto Turn On switch on the A 23 is in its Audio up position Set the Audio triggering Sensitivity adjustment knob on the rear panel to the desired level Start with the 12 o clock positi...

Страница 11: ...ower to all the components in your audio system Make sure the AutoTurn On switch on the a 23 rear panel is in it 12V down position To Connect Plug one end of the trigger wire into the 12V Input jack on the A 23 Plug the other end of this wire into the external DC source 8 1 2 YOU SHOULD KNOW If the device you want to use to control your A 23 doesn t have a 2 5 mm trigger output connector you can c...

Страница 12: ...urrent Before Connecting Remove power to all the components in your audio system To Connect Plug one end of the trigger wire into the 12V Out jack on the A 23 Plug the other end of this wire into the component that you want the A 23 to trigger CONNECTING THE A 23 TO TRIGGER ANOTHER COMPONENT 9 1 2 YOU SHOULD KNOW If the device you want to use to control your A 23 doesn t have a 2 5 mm trigger outp...

Страница 13: ...lumination of Channel Status Indicators A blue channel indicator will stop glowing if there is a fault in its corresponding amplifier channel If this occurs for either channel the halo glow behind the On Off button will also change from blue to red High Temp Indicator This indicator is near the right side of the panel recess It will glow red if either channel overheats Level Controls We recommend ...

Страница 14: ...peration When you purchased your A 23 its rear panel Voltage Selector switch was already set for the proper voltage in your area Nevertheless it s wise to double check it before plugging into an AC outlet If you move to a location with a different line voltage you can easily convert the A 23 For 110 120 Vac Operation Remove the lock out bracket with a phillips screwdriver Next slide the switch sid...

Страница 15: ...eable parts inside To avoid the risk of electric shock do not remove its top cover The amplifier s exterior can easily be cleaned with a soft cloth pre moistened only with a few drops of water or glass cleaner Main Power Fuse If this fuse blows please contact Parasound Technical Service for further advice 12 Notes ...

Страница 16: ...ate ventilation Move switch to its Stereo position Mono Bridge switch is in the Mono bridged position Damaged speaker Move to the correct position for the jack in use Balanced Unbalanced switch is in the incorrect position Not enough ventilation Make sure Auto On selector switch is in its 12V position A 23 is overheating No power A 23 will not turn on with DC voltage A 23 will not turn on with aud...

Страница 17: ...ccept any of the following Units with collect shipping charges Units without a valid RA number Units without a suitable shipping carton Units for which we see or hear evidence of improper packing For a non warranty repair contact us for an estimate of the repair charges before you ship the unit to us The same packing and Return Authorization number procedures apply Important Notice Shipping the A ...

Страница 18: ... signals For example when a 1 Volt signal arrives at a balanced input stage the differential input sees a positive 1 Volt minus a negative 1 Volt or 2 Volts total External hum and noise that somehow gets into a TECHNICALLY SPEAKING 15 balanced line is common to both its positive and negative conductors with respect to ground Therefore it is canceled or rejected by the differential input circuit Th...

Страница 19: ...tch on the A 23 to eliminate most ground loops This separates the A 23 s signal input ground from its chassis ground to isolate unwanted voltage in the ground shields of the unbalanced RCA interconnect cables Be sure your system installation is finished before you try moving the Ground Lift switch from its Normal to its Lift position Loop Out Jacks The Right and Left Loop Out jacks are convenient ...

Страница 20: ...harshness and brittle sound so often found in other amplifiers Circuit designed by John Curl Parasound design consultant John Curl has been a legend among audiophiles and electronic engineers for decades He pioneered measurements to correlate musical accuracy with the materials used in parts worked with world class touring companies has designed highly coveted audio classics including the original...

Страница 21: ...ge is to deliver the enormous current and voltage from its power supply to the speakers Bipolar output transistors are better than MOSFETS in the output stage because of their higher safe operating area SOA and inherent ruggedness Each channel s output stage employs three pairs of high current 15 ampere bipolar transistors to insure long term reliability even with continuous high power operation a...

Страница 22: ...tivity Balanced 1 V for 28 28 V output into 8 Ω Unbalanced 1 V per leg for 28 28 V output into 8 Ω Features and specifications subject to change without notice Loop Output Level Same as input level S N Ratio 112 dB input shorted IHF A weighted Damping Factor 800 at 20 Hz DC Trigger Requirements 9 Vdc to 12 Vdc 2 mA Audio Trigger Requirements 50 mV AC 200 mV AC DC Trigger Output Capacity Requiremen...

Страница 23: ...Parasound Products Inc 950 Battery Street San Francisco CA 94111 415 397 7100 Fax 415 397 0144 www parasound com ...

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