Tascam PA-30 User's Manual
Contents
1. Frequency Response 20 Hz to 20 kHz 0 1 dB at rated power output Damping Factor 80 minimum 8 ohm load 20 Hz to 20 kHz Input Impedance and Sensltivity 1OdBV 0 3 volt RMS for rated output 15 kohm unbalanced at RCA input 1 3 dBu 0 9 volts RMS for rated output 40 kohm balanced at XLR input Hum and Noise 85 dB below rated output Minimum Load Impedance 8 ohms per channel stereo mode 8 ohms BTL mode 10 TASCAM PA 30 Protection Circuits DC balance voltage protector electronic output power overload protector Semiconductor Complement 9 transistors 8 diodes 2 integrated circuits 3 LEDs Power Requimments 120 230 volts 50 60 Hz AC switchable 8 Watts at idle 130 Watts at rated output Weight 4 5 kg net 5 5 kg in shipping carton Physical Dimensions 2 1 54 mm high 19 482 mm wide 10 9 276 mm deep NOTES Specifications subject to change without notice 0 dBV is referenced to 1 volt RMS 0 dBu is referenced to 0 775 volt RMS TASCAM PA 30 11 i TASCAM TEAC Professional Division TEAC CORPORATION Phone 0422 52 5082 PA 30 3 7 3 Nakacho Musashino shi Tokyo 180 8550 Japan TEAC AMERICA INC Phone 323 726 0303 7733 Telegraph Road Montebello California 90640 TEAC CANADA LTD Phone 905 890 8008 Facsimile 905 890 9888 5939 Wallace Street Mississauga Ontario L4Z 1Z8 Canada TEAC MEXICO S A De C V Phone 5 851 5500 Campesi2. 0 3 volt RMS at the RCA inputs and 1 3 dBu 0 9 volt RMS at the XLR inputs for rated output with Input Level control at maximum Pin assignments are as follows RCA type Shell common Tip high XLR type Pin I common Pin 2 high Pin 3 Tow Virtually any line level source may be connected to these inputs Refer to the Connection and Installation section for further details 7 MODE switch A single two position slide switch on rear panel selects either monophonic BTL _ Balanced Transformerless also known as bridged with switch set to BTL or stereo operation with switch set to STEREO 6 TASCAM PA 30 If the MODE switch is not correctly set damage to the loudspeakers or to the PA 30 may result For a complete explanation of use of the MODE switch consult the section on BTL Operation on page 9 of this manual 8 SPEAKERS A amp B A pair of color coded locking terminals is provided for output connections to each channel of the PA 30 They will accommodate stripped bare wire or tinned wine ends The minimum allowable load impedance for each output is 8 ohms The actual output connection configuration will vary depending upon the mode of operation selected and the number and type of loudspeakers used Please refer to the sections on BTL Operation and Output Connections before making connections to the PA 30 outputs 9 Mains Power Cord The inlet for AC power
3. a few standard 4 dBm output types Refer From Source Equipment Tip Balanced to this figure when determining the types of cables and adapters to use in connecting to the PA 30 XLR inputs Take care to observe the polarity conventions indicated input polarity reversals may cause acoustical phase cancellation resulting in unnatural sound To PA 30 XLR Input Two Conductor Shielded Cable Oe HC EE Note if source is pin 3 hot reverse pins 2 amp 3 Connect to pin 1 if required by source output Unbalanced E Note if source is pin 3 hot reverse pins 2 amp 3 Single Conductor Shielded Cable Figure 6 Connections to the PA 30 4 dBm Input TASCAM PA 30 7 Connection and Installation Output Connections Each channel of the PA 30 will drive a minimum load impedance of 8 ohms Connecting a load of lower impedance will result in current limiting and may trigger the Protection circuits to shut down the amplifier Figure 7 shows a normal stereo mode connection of two individual speakers to the PA 30 outputs When making loudspeaker connections always be sure to maintain correct polarity if you wire the speakers out of phase with one another you will get acoustical phase cancellations There are two basic methods for connecting multiple speakers to a single amplifier output series connection and parallel connection Loudspeakers connected in series present a higher net impedance than any single un
4. 9409572800 TASCAM TEAC Professional Division PA 30 Dual Power Amplifier OWNER S MANUAL Introduction The TASCAM PA 30 is a high performance professional audio power amplifier for nearfield studio monitoring and low level sound reinforcement In stereo mode the PA 30 delivers 30 watts per channel continuously into an 8 ohm load with no more than 0 05 total harmonic distortion For applications requiring higher output power the unit may be operated in BTL Balanced Transformerless mode also known as bridged operation and will deliver a full 60 watts continuously into 8 ohms see the BTL Operation section of this manual on page 9 In either mode it exhibits a flat frequency response characteristic from 20 Hz to 20 kllz 0 1dB with very low residual hum and noise For maximum flexibility the PA 30 is equipped with both XLR type balanced and RCA type unbalanced input connectors These accommodate nominal input signal operating levels of 4 dBm and 10 dBV respectively essentially eliminating the necessity for external compensating pads or gain stages A single continuously variable INPUT LEVEL control attenuates input signals so the unit s sensitivity can be calibrated to the gain structure of the source equipment The PA 30 is designed and built to provide years of trouble free service with little or no maintenance Its well built power transformer easily handles continu
5. acoustical cancellations at low frequencies resulting in poor sound quality In rare cases it can even cause a woofer to blow out Connections Before changing the position of the MODE switch or making any input and output connections turn OFF the PA 30 To select BTL operation move the MODE switch to the BTL MONO position Figure 9 illustrates the connections for BTL mode The input signal is connected to the Channel A input using either the 10 dBV RCA or the 4 dBm XLR connector The Channel B input is left unconnected The load is connected across the two output hot red terminals and the black terminals are left unconnected Be sure to observe correct output polarity Channel A is positive and Channel B is negative Note that the minimum permissible load impedanoe in BTL mode is 8 ohms Connecting loads with a lower impedance will result in current limiting and may trigger the Protection circuits to shut down the amplifier Figure 9 BTL Mode Connection TASCAM PA 30 9 Specifications Output power at 8 ohms 1 kHz 30 Watts minimum RMS per channel in stereo mode both channels driven 0 05 THD 60 Watts minimum RMS in BTL monophonic mode 0 08 THD Total Harmonic Distortion 1 kHz 0 05 30 Watts 8 ohms STEREO 0 08 60 Watts 8 ohm BTL Intermodulation Distortion Less than 0 2 70Hz 7kHz 4 1
6. e Protection indicator lights Once the PA 30 is turned off and the fault condition is cleared the Protection circuit will automatically reset and normal operation can be resumed provided that the fault has not damaged the unit If the Protection indicator lights when the PA 30 is first switched on turn the Power switch OFF and recheck all of your connections before resetting power 3 BTL Indicator The orange LED BTL indicator will light whenever the MODE switch on rear panel is in the BTL MONO position 4 INPUT LEVEL Control A single rotary variable attenuator sets the input sensitivity of the PA 30 Amplifier The degree of attenuation varies from zero loss maximum sensitivity at the MAX position to infinite loss at the MIN position 5 PHONES Jack This Tip Ring Sleeve 1 4 phone jack accommodates 8 ohms or higher impedance stereo headphones TASCAM PA 30 5 Features Figure 4 PA 30 REAR PANEL 6 INPUTS A amp B XLR amp RCA Type Two input connectors are provided for each channel one RCA phono jack and one XLR type female connector Either connector may be used on a given channel but both connectors for a single channel should not be used simultaneously Both inputs present a high impedance and cause no appreciable loading to source outputs Input sensitivity is 10 dBV
7. eries Parallel 4 OHMS 2 OHMS 1 33 OHMS 1 OHM 4 OHMS 8 OHMS 4 OHMS 2 66 OHMS 2 OHMS 8 OHMS 16 OHMS 8 OHMS 5 33 OHMS 4 OHMS 16 OHMS Note Impedances shown in brackets are too low for the amplifier Do not use three loudspeaker configurations Figure 8 Connecting Multiple Loudspeakers 8 TASCAM PA 30 The PA 30 rear panel includes a switch that selects either normal stereo mode or a special mode termed BTL Balanced Transformerless The setting of this switch determines the maximum power available to the load from the PA 30 and also decisively affects how the load is connected to the amplifier This section explains the BTL mode and describes how to use it Theory of Operation BTL mode also called bridged mode uses both channels of the PA 30 to form a single monophonic amplifier with significantly higher power capability If your loudspeakers can handle the increased power BTL mode will give you more headroom resulting in undistorted reproduction of program peaks and significantly greater punch from your system When the MODE switch is in the BTL MONO position only the Channel A input is active the Channel B input is disabled and signals present at either of the Channel B input connectors are ignored by the amplifier The signal at the Channel A input is amplified and sent to both outputs of the PA 30 but the polarly of Channel B is reversed with respect to Channel A In other words the two chan
8. it alone Parallel connection by contrast lowers the net load impedance Sometimes the two methods are combined to obtain an optimum load impedance Figure 8 shows what happens to the net load impedance when multiple loudspeakers are connected in various ways In all cases 1t is assumed that all speakers in a given system have the same impedance Generally only parallel connection is used in professional audio for two fundamental reasons First if one of the speakers in a parallel system fails the others will still function Remember those old Christmas lights that all went out the minute one bulb failed They were connected in series Second parallel connection results in a lower net impedance The closer the load impedance gets to the allowable minimum for the amplifier the more efficiently is the amplifier s power capability used since the lower load impedance draws more current from the output stage i ws PA 3O DUAL POWER AMPLIFIER 120 230V AC 50 60Hz 80W TEAC CORPORATION wao w cn CAUTION K RISK Figure 7 Typical Stereo Output Connection Each Unit Two In Series Three In Series Four In Series 4 OHMS 8 OHMS 12 OHMS 16 OHMS 8 OHMS 16 OHMS 24 OHMS 32 OHMS 16 OHMS 32 OHMS 48 OHMS 64 OHMS Each Unit Two In Parallel Three In Parallel Four In Parallel Four In S
9. nels are intentionally out of phase The single load remember BTL is a monophonic or single channel mode is wired across the two channel output hot red terminals and the black output terminals are left unconnected The minimum allowable load impedance is 8 ohms not 4 ohms as is the case in stereo mode and the available power to the load is 50 watts continuous at 8 ohms BTL mode is electrically identical to push pull transmission at line level the signal level is simply much higher the two channel outputs deliver the same absolute signal voltage but with opposite polarities So when the Channel A output is at 10 volts for example the Channel B output is at 10 volts The difference between the two which is the total voltage across the load is then 20 volts BTL operation The voltage across the load is thus effectively doubled which doubles the power Notice there is a crucial difference between BTL mode and what is normally termed mono in the HiFi world When we select mono on a HiFi preamp or integrated amplifier what we intend and what we get is the same signal from both speakers with the same polarity It is very important to understand the distinction between this and BTL mode because if two speakers are connected to the PA 30 in a normal stereo configuration and the MODE switch is set to BTL the system still works but the two speakers are out of phase This will cause
10. ng connections Simple plug in testers are available from a variety of electronics and hardware stores 4 TASCAM PA 30 If an outlet appears to require repairs consult a qualified electrician and don t use it An improperly wired outlet may present a serious shock hazard For reference Figure 1 shows the characteristics of a properly wired US standard three prong wall outlet 120 VAC 0 Volts 0 Volts 120 VAC Figure 1 Standard wall Receptacle Voltage Conversion Be sure to unplug the power cord from the AC outlet before repositioning the voltage converter switch 1 Locate the voltage selector on the rear panel 2 Using a flat bladed screwdriver set to the appropriate 120 V or 230 V position according to your area o N Figure 2 Voltage Selector Features Figure 3 PA 30 FRONT PANEL 1 POWER Switch and Indicator A two position rocker type switch controls power to the unit Depressing the upper surface of the switch turns the amplifier on depressing the lower surface turns it off The green LED Power indicator will light whenever the unit is on and is connected to a properly functioning source of power 2 PROTECTION Indicator The red LED Protection indicator remains off whenever the PA 30 is turned on and is operating normally If an overload short circuit DC offset or other problem triggers the internal electronic protection circuitry the unit shuts down and th
11. nos 184 Col Granjes Esmeralda CP 09810 Mexico DF TEAC UK LIMITED Phone 01923 819699 5 Marlin House Croxley Business Park Watford Hertfordshire WD1 8TE U K TEAC DEUTSCHLAND GmbH Phone 0611 71580 Bahnstrasse 12 65205 Wiesbaden Erbenheim Germany TEAC FRANCE S A Phone 01 42 37 01 02 17 Rue Alexis de Tocqueville CE 005 92182 Antony Cedex France TEAC BELGIUM NV SA Phone 0031 162 510210 TEAC NEDERLAND BV Phone 0162 510210 Oeverkruid 15 NL 4941 VV Raamsdonksveer Netherlands Oeverkruid 15 NL 4941 VV Raamsdonksveer Netherlands TEAC AUSTRALIA PTY LTD A B N 80 005 408 462 Phone 03 9644 2442 106 Bay Street Port Melbourne Victoria 3207 Australia TEAC ITALIANA S p A Phone 02 66010500 Via C Cantu 11 20092 Cinisello Balsamo Milano Italy Printed in China MA 0761
12. olete outlet 10 Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 12 Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over 13 Unplug this apparatus during lightning storms or when unused for long periods of time 14 Refer all servicing to qualified service personnel Servicing 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 Do not expose this apparatus to drips or splashes Do not place any objects filled with liquids such as vases on the apparatus Do not install this apparatus in a confined space such as a book case or similar unit The apparatus draws nominal non operating power from the AC outlet with its POWER switch in the off position TASCAM PA 30 3 Summary of Operating Precautions Do not use the PA 30 if the power cord appears frayed or broken Do not spill liquids into or on the PA 30 chassis If the chassis becomes wet allow it to dry tho
13. ous full power operation and all power semiconductor circuits are mounted on a large convection cooled heatsink CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN Multiple resettable electronic protection circuits guard against destructive turn on transients output overload DC offsets and output shorts While the PA 30 is almost indestructible it has been engineered to be easy to service Like all TASCAM professional products it is backed by a worldwide network of TASCAM dealers and TEAC authorized TASCAM service centers Connection and operation of the PA 30 is simple and straightforward This manual presents a detailed description of the unit s features along with basic connection instructions and specifications Please take a few moments to study it before connecting and operating your PA 30 Power Amplifier TABLE OF CONTENTS Inttod ction 54i ett ertet 2 Important Safety Instructions sess 3 Summary of Operating Precautions 4 A A OOO 5 Connection amp Installation esee 7 BTE Operation oce a Rs 9 NAAA e tte ree ttd 10 CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT REMOVE COVER OR BACK NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the user to the presence of uninsulated dangerous voltage within the prod
14. roughly before reconnecting the unit Allow sufficient space at the top and bottom of the PA 30 to permit a flow of cooling air Keep the unit away from radiators or others that produce heat Never connect the PA 30 outputs to a battery power supply or other voltage source Do not short the output hot terminals together The minimum allowable load impedance on each PA 30 output is 8 ohms in stereo mode or BTL mode Connecting loads of lower impedance will result in current limiting and or activation of the protection circuits Before operating the PA 30 be certain that the MODE switch is set in accordance with the desired Operational mode and output connection configuration see the BTL Operation section of this manual page 9 Any unauthorized internal modification to the PA 30 will invalidate the warranty and may result in hazardous conditions Refer all servicing to a TEAC authorized TASCAM service center Connect the PA 30 only to properly wired AC outlets Make certain that the voltage is correct for the version of the unit that you are using 110 to 120 volts at 60 Hz for domestic USA AC Power Connection The PA 30 requires a reliable source of single phase power at 110 to 120 volts AC 60 Hz domestic US version It has a two prong ungrounded AC cord and may be connected to either two prong or three prong outlets If you have any doubt about the wiring of the outlet that you wish to use it is wise to test it before maki
15. to the PA 30 is a two prong ungrounded plug rear panel mounted The PA 30 requires 120 230 volts AC at 50 60 Hz It draws 8 watts at idle and 130 watts at full rated output Input Connections Before making connections to the PA 30 signal inputs find the nominal output level of your signal source this information is usually given in the Specifications section of the instruction manual Equipment operating at 10 dBV should be connected to the RCA phono inputs while 4 dBm equipment will operate best if connected to the XLR type inputs Low level signal such as an electric guitar or phonograph cartridge will require an external preamplifier From Source Equipment Connection and Installation Components that operate at 10 dBV normally feature either RCA or 1 4 inch phone output connectors presenting an unbalanced two connection drive Standard connecting cables and adapters may be used with such equipment If you are making your own cables refer to Figure 5 for wiring details To PA 30 RCA Input eae Ae ajk A Ube Figure 5 Connections to the PA 30 10 dBV Input Professional 4 dBm components on the other hand may feature either 1 4 inch phone or XLR type output connectors presenting either an unbalanced or a balanced drive In some cases standard microphone cables may be used for such equipment in others special cables or adapters may be required Figure 6 shows the recommended wiring configu rations for
16. uct s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons A accompanying the appliance The exclamation point within an equilateral triangle is intended to alert the user to the pres ence of important operating and maintenance servicing instructions in the literature This appliance has a serial number located on the rear panel Please record the model number and serial number and retain them for your records Model number Serial number WARNING TO PREVENT FIRE OR SHOCK HAZARD DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE 2 TASCAM PA 30 IMPORTANT SAFETY INSTRUCTIONS 1 Read these instructions 2 Keep these instructions 3 Heed all warnings 4 Follow all instructions 5 Do not use this apparatus near water 6 Clean only with dry cloth 7 Do not block any ventilation openings Install in accordance with the manufacturer s instructions 8 Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat 9 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 obs
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