Manual - TOA Electronics
Contents
1. Note Use the optional PF 511 Perforated Panels to provide sufficient ventilation when mounting 2 or more units in an equipment rack 9 CONTROL SETTINGS Output levels are adjustable with individual volume controls For music play or announcements adjust the corresponding volume control so that the red indicator doesn t light Note that the sound quality is downgraded when the red indicator remains lit To prevent the accidental change of the settings of input volume and tone Bass and Treble controls remove their knobs after setting them to the desired position and attach the supplied or optional YA 920 Volume Control Covers instead Control knob 10 DIMENSIONAL DIAGRAM Applicable to all models Unit mm 420 18 326 5 ST O GO Xt s a la MUM IML i Ae AAR Le 4 DDD WUMD O This figure represents the A 724 11 BLOCK DIAGRAM YO IMS HIMOd q zH 09 OV A OGL 3 br amu lt 5 i AWNIOA ALOWSY pas ol ALOW3AY HIMOd att aai iomeciantee 3SN3S SLAW al asny JOMOd 10 JBMOd ol TOHINOO ALN AZL ld uono s opne 10 J9M0q Jajaw jana ols ajnpow O1 AP OZ 1ndino Salas 006 JINON O DOT o uun oA Josu s INANI rwy Ajuo pZz Y i Ka O OL AP OZ 8 LNdNI2. Volume control cover YA 920 900 series module Perforated panel PF 511 11 4 724 Power Source 120 V AC 60 Hz Rated Output 240W Power Current Consumption 565 W rated output 215 W based on UL60065 under 60 mA when power switch is OFF Frequency Response 50 20 000 Hz 3 dB Distortion Under 2 at 1 kHz rated power Input INPUT 1 6 70 to 50 dB 600 Q MIC 10 dB 600 Q LINE INPUT 1 Transformer balanced removable terminal block 3 pins INPUT 2 6 Electronically balanced removable terminal block 3 pins Note Each of INPUT 2 and 3 can be converted into transformer balanced type by using an optional transformer IT 455 INPUT 7 8 LINE 20 dB 10 kO unbalanced RCA jack MODULE 20 dB 10 kQ PWR AMP IN 0 dB 10 kQ unbalanced RCA jack An equalizer or other signal processor connectable between PRE AMP OUT and PWR AMP IN terminals Output REC OUT 0 dB 600 Q unbalanced RCA jack PRE AMP OUT O dB 600 O unbalanced RCA jack SPEAKER OUT 70 V line 21 Q 25 V line 2 6 O and 4 16 O removable terminal block 4 pins Phantom Power 23 V DC ON or OFF for each INPUT 1 6 MIC input with switch setting S N Ratio Band pass 20 20 000 Hz Over 55 dB INPUT 1 6 mic trim volume max 600 Q terminated Over 70 dB INPUT 1 6 mic trim volume min 600 Q terminated Over 76 dB Master volume max Over 90 dB Al
3. 20 000 Hz Over 55 dB INPUT 1 6 mic trim volume max 600 Q terminated Over 70 dB INPUT 1 6 mic trim volume min 600 Q terminated Over 76 dB Master volume max Over 90 dB All input volume min Tone Control Bass 10 dB at 100 Hz Treble 10 dB at 10 kHz Control Input REMOTE VOLUME Removable terminal block POWER REMOTE No voltage make contact input removable terminal block Open voltage Under 14 V DC Short circuit Under 0 5 mA No voltage make contact input removable terminal block Open voltage Under 17 V DC Short circuit Under 1 5 mA MUTE CONTROL Indicator 5 point LED output level meter Power indicator LED Operating Temperature 10 C to 40 C Finish Panel ABS resin black hair line Case Steel plate black Dimensions 420 w x 107 7 h x 351 5 d mm Weight OdB 1V 12 kg Note The design and specifications are subject to change without notice for improvement Accessories AC power cord 2 m Removable terminal plug 4 pins Removable terminal plug 6 pins Optional products Input transformer IT 455 Available as a service part with the Removable terminal plug 3 pins 6 Volume control cover YA 920 4 Rack mounting bracket MB 25B order code 114 03 120 40 Additionally needed is the insulating sheet also available as a service part with 131 27 700 90
4. NOO O or o A Gg o J O 009 dP 0S 0 02 DIN AOL lo seujduny O 009 9P 01 3NI1 10 ng Ino ds Smed awnjon NUN 9 7 LNdNI INANI OL AP O NI dNV YMd Oy T G 009 gp 0 LNO dV IHd oa PATEN Ionuoo O 009 9P 0S 0 02 OIW suo O 009 gp 0L INIT Z LNdNI REA WIH1 OIN AMENI JBWJO SUBI YIA 3A139384 ILAN IN 3NN O 009 gp 09 0 02 DIW K O 009 gD 0L INIT L INANI I uun oA OUIN OA WIYL IN L 7 009 gp 0 HILSVN INANI INO 034 l x DIIN ann jemod wiojueud 10 12 SPECIFICATIONS A 706 Power Source 120 V AC 60 Hz Rated Output 60 W Power Current Consumption 155 W rated output 68 W based on UL60065 under 250 mA when power switch is OFF Frequency Response 50 20 000 Hz 3 dB Distortion Under 2 at 1 kHz rated power Input INPUT 1 6 70 to 50 dB 600 Q MIC 10 dB 600 Q LINE INPUT 1 Transformer balanced removable terminal block 3 pins INPUT 2 6 Electronically balanced removable terminal block 3 pins Note Each of INPUT 2 and 3 can be converted into transformer balanced type by using an optional transformer IT 455 INPUT 7 8 LINE 20 dB 10 kQ unbalanced RCA jack MODULE 20 dB 10 kQ PWR AMP IN 0 dB 10 kO unbalanced RCA jack An equalizer or other signal processor connectable between PRE AMP OUT and PWR AMP IN terminals REC OUT 0 dB 600 Q unbalanced RCA jack
5. 40 Additionally needed is the insulating Removable terminal plug 3 pins Volume control cover YA 920 Rack mounting bracket MB 25B Volume control cover YA 920 900 series module Perforated panel PF 511 sheet also available as a service part with 131 27 700 90 4 712 Power Source 120 V AC 60 Hz Rated Output 120W Power Current Consumption 285 W rated output 110 W based on UL60065 under 400 mA when power switch is OFF Frequency Response 50 20 000 Hz 3 dB Distortion Under 2 at 1 kHz rated power Input INPUT 1 6 70 to 50 dB 600 Q MIC 10 dB 600 Q LINE INPUT 1 Transformer balanced removable terminal block 3 pins INPUT 2 6 Electronically balanced removable terminal block 3 pins Note Each of INPUT 2 and 3 can be converted into transformer balanced type by using an optional transformer IT 455 INPUT 7 8 LINE 20 dB 10 kO unbalanced RCA jack MODULE 20 dB 10 kQ PWR AMP IN 0 dB 10 kQ unbalanced RCA jack An equalizer or other signal processor connectable between PRE AMP OUT and PWR AMP IN terminals Output REC OUT 0 dB 600 Q unbalanced RCA jack PRE AMP OUT O dB 600 O unbalanced RCA jack SPEAKER OUT 70 V line 42 Q 25 V line 5 2 O and 4 16 O removable terminal block 4 pins Phantom Power 23 V DC ON or OFF for each INPUT 1 6 MIC input with switch setting S N Ratio Band pass 20
6. or in locations generating sooty smoke or steam as doing otherwise may result in fire or electric shock When the Unit is in Use e Do not place heavy objects on the unit as this may cause it to fall or break which may result in personal injury and or property damage In addition the object itself may fall off and cause injury and or damage Make sure that the volume control is set to minimum position before power is switched on Loud noise produced at high volume when power is switched on can impair hearing Do not operate the unit for an extended period of time with the sound distorting This is an indication of a malfunction which in turn can cause heat to generate and result in a fire Contact your TOA dealer as to the cleaning If dust is allowed to accumulate in the unit over a long period of time a fire or damage to the unit may result If dust accumulates on the power supply plug or in the wall AC outlet a fire may result Clean it periodically In addition insert the plug in the wall outlet securely Switch off the power and unplug the power supply plug from the AC outlet for safety purposes when cleaning or leaving the unit unused for 10 days or more Doing otherwise may cause a fire or electric shock An all pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in the electrical installation of the building A ATTENTION L appareil ne doit pas tre expos au
7. 44 OA J OPERATING INSTRUCTIONS 700 SERIES AMPLIFIERS A 706 A 712 A 724 a N Ka A TABLE OF CONTENTS 1 IMPORTANT SAFETY INSTRUCTIONS 2 2 SAFETY PRECAUTIONS Ban GAAN NAAN 2 3 GENERAL DESCRIPTION a l a T devs Ga sesvese28des vane asan a kasa sasa sasana thas vesdcusaasdennesadedan 4 AA AA usu T 4 5 NOMENCLATURE AND FUNCTIONS PONG AA NINA Aa aah 4 Rea aaa AA AA AN AA AA NA NA a 5 6 CONNECTIONS 6 1 Input COMMECTONS 2c aaa ana GANAN AN AA an 6 6 2 Speaker Connections maam ANDA malana 6 6 3 Remote Volume Control Connection a 6 6 4 Remote Power ON OFF Control Connection 1 aa 7 6 5 Mute Control Connection oo cece ccccccccececeeaeeeeeeeseeeeceeececececceccecececeeeeesaeaeaauauauaeaeaseeeseeeseseeseeees 7 6 6 External Equipment Connection to the PRE AMP OUT and PWR AMP IN Terminals 7 7 INSTALLATION nn An EE EEEEEEEEEEEEEEEEE PERAR ERREA Ennan EEEE 7 8 RACK MOUNTING 1101111111111 0a 8 9 CONTROL SETTINGS a a a 8 10 DIMENSIONAL DIAGRAN aaa 8 11 BLOCK DIAGRAM a n nn rra 9 12 SPECIFICATIONS a a 10 Thank y
8. H 5 HOT COLD EARTH HOT COLD EARTH This figure represents the A 724 2 Mute Send assignment switches MUTE SEND INPUT CH Allow the inputs 1 3 and Module input to be assigned to Mute Send function Notes e Avoid assigning both functions to the same input e The audio signal level to activate muting is independent of input volume settings So the Mute Receive input is muted if a signal enters the Mute Send input even when the input volume is turned down To avoid unwanted muting caused by unintentional inputs such as background noise and noise sound it is recommended to cut the audio signal at the input equipment such as a microphone with talk switch 14 Function switches 1 Phantom power ON OFF switch PHANTOM ON OFF Turns on or off the phantom power for the corresponding input This switch is valid only when the LINE MIC selector switch is set to the MIC position 2 LINE MIC selector switch LINE MIC Selects the input sensitivity of LINE or MIC as follows LINE 10 dB MIC 70 to 50 dB adjustable with the Microphone gain trimmer 15 15 Microphone gain trims MIC TRIM Adjust the microphone input gain for the inputs set to MIC 16 Input 1 6 connectors INPUT 1 6 10 dB LINE or 70 to 50 dB MIC selectable 600 Q balanced removable terminal blocks Either LINE or MIC level can be selected by the Function switch 14 When MIC level is selected the input sensitivi
9. PRE AMP OUT O dB 600 O unbalanced RCA jack SPEAKER OUT 70 V line 83 Q 25 V line 10 Q and 4 16 O removable terminal block 4 pins Phantom Power 23 V DC ON or OFF for each INPUT 1 6 MIC input with switch setting S N Ratio Band pass 20 20 000 Hz Over 55 dB INPUT 1 6 mic trim volume max 600 Q terminated Over 70 dB INPUT 1 6 mic trim volume min 600 Q terminated Over 76 dB Master volume max Over 90 dB All input volume min Tone Control Bass 10 dB at 100 Hz Treble 10 dB at 10 kHz Control Input REMOTE VOLUME Removable terminal block POWER REMOTE No voltage make contact input removable terminal block Open voltage Under 14 V DC Short circuit Under 0 5 mA No voltage make contact input removable terminal block Open voltage Under 17 V DC Short circuit Under 1 5 mA MUTE CONTROL Indicator 5 point LED output level meter Power indicator LED Operating Temperature 10 C to 40 C Finish Panel ABS resin black hair line Case Steel plate black Dimensions 420 w x 107 7 h x 351 5 d mm Weight 0dB 1V 9 5 kg Note The design and specifications are subject to change without notice for improvement e Accessories AC power cord 2 m Removable terminal plug 4 pins Removable terminal plug 6 pins Optional products Input transformer IT 455 Available as a service part with the order code 114 03 120
10. he core disconnection etc If it is malfunctioning no tone sounds To prevent a fire or electric shock never open nor remove the unit case as there are high voltage components inside the unit Refer all servicing to your nearest TOA dealer No objects filled with liquids such as vases shall be placed on the unit If they accidentally spill into the unit this may cause a fire or electric shock Do not insert nor drop metallic objects or flammable materials in the ventilation slots of the unit s cover as this may result in fire or electric shock A CAUTION Indicates a potentially hazardous situation which if mishandled could result in moderate or minor personal injury and or property damage When Installing the Unit e Never plug in nor remove the power supply plug with wet hands as doing so may cause electric shock e When unplugging the power supply cord be sure to grasp the power supply plug never pull on the cord itself Operating the unit with a damaged power supply cord may cause a fire or electric shock When moving the unit be sure to remove its power supply cord from the wall outlet Moving the unit with the power cord connected to the outlet may cause damage to the power cord resulting in fire or electric shock When removing the power cord be sure to hold its plug to pull Avoid installing the unit in humid or dusty locations in locations exposed to the direct sunlight near the heaters
11. ing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped 2 SAFETY PRECAUTIONS The lightning flash with arrowhead The exclamation point within an symbol within an equilateral triangle is equilateral triangle is intended to alert intended to alert the user to the presence the user to the presence of important of uninsulated dangerous voltage within operating and maintenance servicing the product s enclosure that may be of instructions in the literature sufficient magnitude to constitute a risk accompanying the appliance of electric shock to persons e Before installation or use be sure to carefully read all the instructions in this section for correct and safe operation e Be sure to follow all the precautionary instructions in this section which contain important warnings and or cautions regarding safety After reading keep this manual handy for future reference Safety Symbol and Message Conventions Safety symbols and messages described below are used in this manual to prevent bodily injury and property damage which could result from mishandling Before operating your product read this manual first and understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards e U
12. l input volume min Tone Control Bass 10 dB at 100 Hz Treble 10 dB at 10 kHz Control Input REMOTE VOLUME Removable terminal block POWER REMOTE No voltage make contact input removable terminal block Open voltage Under 14 V DC Short circuit Under 0 5 mA No voltage make contact input removable terminal block Open voltage Under 17 V DC Short circuit Under 1 5 mA MUTE CONTROL Indicator 5 point LED output level meter Power indicator LED Operating Temperature 10 C to 40 C Finish Panel ABS resin black hair line Case Steel plate black Dimensions 420 w x 107 7 h x 351 5 d mm Weight OdB 1V 13 5 kg Note The design and specifications are subject to change without notice for improvement Accessories AC power cord 2 m Removable terminal plug 4 pins Removable terminal plug 6 pins Optional products Input transformer IT 455 Available as a service part with the order code 114 03 120 40 Additionally needed is the insulating Removable terminal plug 3 pins 6 Volume control cover YA 920 4 Rack mounting bracket MB 25B Volume control cover YA 920 900 series module Perforated panel PF 511 sheet also available as a service part with 131 27 700 90 URL http Awww toa jp 133 12 920 9E A TOA Corporation
13. llows remote control of the unit s power ON OFF No voltage make contact input 3 Mute control terminals MUTE CONTROL Shorting these terminals mutes the Mute Receive inputs the inputs set to be muted The mute control works regardless of whether or not there is a signal to a Mute Send input the input set to activate muting 11 Mute sensitivity control MUTE SENSE Adjusts the threshold level in a range of 36 dB for the Mute Send inputs to activate the mute function Turn clockwise to increase the threshold level lower sensitivity and counterclockwise to decrease the level higher sensitivity 12 Preamplifier output jack PRE AMP OUT 0 dB 600 Q unbalanced RCA jack Outputs all input signals Connects to a signal processor such as a limiter or equalizer Refer to p 7 13 Mute assignment switches MUTE ASSIGNMENT Assign the individual inputs to Mute Receive inputs to be muted or Mute Send inputs to activate muting function When a signal enters a Mute Send input Mute Receive inputs are all muted 1 Mute Receive assignment switches MUTE RECEIVE INPUT CH Allow all inputs INPUT 1 8 and Module to be assigned to Mute Receive function MUTE SEND PUT Flor Ele paa ORA 9 l HOT COLD EARTH if il HOT COLD EARTH NPUTI D INPUT 4 HOT COLD EARTH L nu D INPUT 6 INPUT 2 INPUT 5 r rron x O Puan NG euanron MC OAS wa O wa O HOT COLD EARTH
14. ou for purchasing TOA s 700 Series Amplifiers Please carefully follow the instructions in this manual to ensure long trouble free use of your equipment TOA Corporation 1 IMPORTANT SAFETY INSTRUCTIONS e Read these instructions e Keep these instructions e Heed all warnings e Follow all instructions e Do not use this apparatus near water e Clean only with dry cloth Do not block any ventilation openings Install in accordance with the manufacture s instructions e Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat e Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electrician for replacement of the obsolete outlet e Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus e Only use attachments accessories specified by the manufacturer e Use only with the bracket specified by the manufacturer or sold with the apparatus e Unplug this apparatus during lightning storms or when unused for long periods of time e Refer all servicing to qualified service personnel Servic
15. pment AUX MIC H Input source source E 4 CHE UM pon source LLY HOT COLD EARTH HOT COLD EARTH 6 2 Speaker Connections COM 49 25 V 70 V COM 49 25V 70 V COM 49 25 V 70 V 25 V LINE 70 V LINE Total impedance Total impedance 10 Q A 706 83 Q A 706 5 2 Q A 712 42 Q A 712 2 6 Q A 724 21 Q A 724 25 V Line 70 V Line Notes Do not use both the 4 Q 25 V and 70 V terminals at the same time Impedances indicated in the figures represent the total speaker system load impedances 6 3 Remote Volume Control Connection The external volume control can remotely adjust the signal level at post master volume control When performing the remote volume control adjust the master volume control in advance noting that its setting limits the maximum signal level adjustable with the volume control Be sure to avoid turning fully down the master volume control MUTE CONTROL REMOTE VOLUME REMOTE Volume control 10 kQ linear taper L J L J C H POWER 6 4 Remote Power ON OFF Control Connection To perform this control be sure to turn the power switch OFF Shorting the power remote control terminals turns the power on and opening them turns the power off With the power switch ON the power on off cannot be remotely controlled LJ L J C H REMOTE POWER VOLUME REMOTE 6 5 Mute Cont
16. rol Connection pra CONTROL Shorting the mute control terminals mutes the Mute Receive inputs the Mai inputs set to be muted Note The mute control works regardless of whether or not there is a signal to eau a a Mute Send input the input set to activate muting REMOTE POWER VOLUME REMOTE 6 6 External Equipment Connection to the PRE AMP OUT and PWR AMP IN Terminals By connecting a signal processor such as an i i equalizer or limiter between the preamplifier section iy al AOO Sa PRE AMP OUT and the power amplifier section PWR AMP IN of the A 700 series signals can be tailored for desired sound output AA AG a ca Note a Basas Baa ah ee Gn Inserting an RCA plug into the PWR AMP IN Equalizer limiter etc terminal disconnects the internal power amplifier section from the preamplifier section 7 INSTALLATION To prevent the internal temperature rise keep the unit at least 10 cm away from objects that may obstruct air flow Z E NG Over 10 cm Over 10 cm Over 10 cm 8 RACK MOUNTING To mount the unit in a standard 19 equipment rack use the optional MB 25B Rack Mounting Bracket Attach the MB 25B to the unit using the supplied 4 screws When using other screws each screw must be shorter than 16 mm M4 x 16 Machine screw included in MB 25B Amplifiers MB 25B PF 511 optional
17. s green when the power is switched on 7 Treble control TREBLE Adjusts treble response Turn clockwise to Input 1 8 volume controls INPUT 1 8 Adjust the corresponding input signal levels Turn each control clockwise to increase and counterclockwise to decrease the level Master volume control MASTER Adjusts the overall signal level Turn the control clockwise to increase and counterclockwise to decrease the level LED level meter Indicates an output level increase treble output and counterclockwise to decrease it The center position provides flat characteristics Module input volume control MODULE Adjusts the signal level of the module input on the rear panel Turn the control clockwise to increase and counterclockwise to decrease the level Rear O NC MUTE A 120V o 60Hz 215W E MUTE RECEIVE PUT CH D PHANTOM MC PHANTOM MC soe hy o7654 M321eeee OT LNE TRH OFF LNE TRM LJ L t COUT PRE AMP OUT GRE kaa D OO O PWR AMP IN INPUT 8 INPUT 7 SP OUT cass 2 wRNG O DD 9 AC inlet Connect the supplied power cord 10 Remote control connector Removable terminal block 1 Remote volume control terminals REMOTE VOLUME Connecting a 10 kQ linear taper volume control across these terminals will allow remote control of preamplifier output and speaker output levels 2 Power remote control terminals POWER REMOTE A
18. se the unit only with the voltage specified on the AN WARNING unit Using a voltage higher than that which is specified may result in fire or electric shock Indicates a potentially hazardous situation which if mishandled could result in death or serious Do not cut kink otherwise damage nor modify the personal injury power supply cord In addition avoid using the power cord in close proximity to heaters and never place heavy objects including the unit itself on When Installing the Unit the power cord as doing so may result in fire or electric shock e The unit shall not be exposed to dripping or splashing To reduce the risk of fire or electric Avoid installing or mounting the unit in unstable shock do not expose this unit to rain or moisture locations such as on a rickety table or a slanted surface Doing so may result in the unit falling down causing personal injury and or property damage When the Unit is in Use Should the following irregularity be found during use immediately switch off the power disconnect the power supply plug from the AC outlet and contact your nearest TOA dealer Make no further attempt to operate the unit in this condition as this may cause fire or electric shock If you detect smoke or a strange smell coming from the unit If water or any metallic object gets into the unit If the unit falls or the unit case breaks If the power supply cord is damaged exposure of t
19. ty can be adjusted from 70 to 50 dB with the Microphone gain trim 15 The inputs 2 and 3 which are electronically 17 18 19 6 balanced can be converted into transformer balanced type by using optional transformers IT 455 Module input slot Accepts TOA s 900 series module Functional ground terminal Hum noise may be generated when external equipment is connected to the unit Connecting this terminal to the functional ground terminal of the external equipment may reduce the hum noise Note This terminal is not for protective earth Speaker output terminals SP OUT 4 Q 25 V and 70 V outputs removable terminal block Connects to speakers CONNECTIONS 6 1 Input Connections MIC LINE 20 21 22 C Input Recording output jacks REC OUT 0 dB 600 Q unbalanced RCA jacks Output all input signals before they enter the master volume control Connect a cassette deck etc when recording the broadcast contents Power amplifier input jack PWR AMP IN 0 dB 600 O unbalanced RCA jack Accepts output signals from the signal processor connected to the Preamplifier output jack 12 Refer to p 7 Inserting an RCA plug disconnects the internal power amplifier section from the preamplifier section Input 7 and 8 jacks INPUT 7 8 20 dB 10 kQ unbalanced RCA jacks Accept output signals from external equi
20. x claboussures ou coulements et tous objets remplis de liquide tels que vases ne doivent pas tre sur l appareil 3 GENERAL DESCRIPTION Equipped with 6 LINE MIC selectable inputs 2 LINE inputs and 1 MODULE input the A 706 A 712 and A 724 PA amplifiers are designed to suit PA system applications such as announcements BGM and broadcasting in churches large rooms and factories 4 FEATURES Power output of 60 W A 706 120 W A 712 and 240 W A 724 e Mute Receive function assignable to all inputs and Mute Send function assignable to Inputs 1 3 and Mute input An equalizer or other signal processor connectable between PWR AMP IN and PRE AMP OUT terminals to make fine adjustment of sound Tone controls bass and treble Output level meter e Master volume control for adjusting overall input signal level e Microphone gain trims for adjusting MIC level on Inputs 1 6 5 NOMENCLATURE AND FUNCTIONS Front INPUT 6 o MASTER vil a O 6 O od o 0 2 0 8 O 24 oN BoF Ed TOA 700 SERIES AMPLIFIER model A 724 This figure represents the A 724 1 Power switch POWER Press to turn ON the power Press again to turn the power OFF 6 Bass control BASS Adjusts bass response Turn clockwise to increase bass output and counterclockwise to decrease it The center position provides flat characteristics 2 Power indicator Light
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