Shure SM98A User's Manual
Contents
1. CUT 16V BLK W103 C109 150pF R112 7 i lt C114 A i i i NZ M1 M2 90B4339C 3 O _ C mt NOTES 1 UNLESS OTHERWISE SPECIFIED ALL RESISTORS ARE 1 8 WATT 5 2 UNLESS OTHERWISE SPECIFIED ALL CAPACITORS IN uF 10 50 VOR GREATER ELECTROLYTIC CAPACITORS SHOWN IN uF X VOLTS 20 3 THE FOLLOWING SYMBOLS DENOTE ait PC BOARD GROUND GROUND CIRCUIT DIAGRAM SM98A PREAMPLIFIER FIGURE 13 SHURE SHURE Incorporated Web Address http www shure com 222 Hartrey Avenue Evanston IL 60202 3696 U S A Phone 847 866 2200 Fax 847 866 2279 In Europe Phone 49 7131 72140 Fax 49 7131 721414 In Asia Phone 852 2893 4290 Fax 852 2893 4055 Elsewhere Phone 847 866 2200 Fax 847 866 25852. Models WM98 and SM98A User Guide MODEL WM98 AND SM98A MINIATURE CONDENSER MICROPHONES MICROPHONE POLAR MODIFIER SWIVEL ADAPTER PREAMPLIFIER GENERAL Shure Models WM98 and SM98A are miniature electret con denser microphones with a unidirectional cardioid pickup pattern A smooth wide frequency response from 40 to 20 000 Hz makes the microphones well suited for musical instrument pickup The WM98 is for wireless use the SM98A is for wired applications Both models feature the 98 microphone element The cardioid polar response of the 98 discriminates against sounds coming from the rear permitting higher gain before feed back in sound reinforcement applications With its true cardioid pat tern extending to 20 000 Hz the microphone can often be used for pickup of a particular instrument in an ensemble or orchestra When still stronger rejection of off axis pickup is required the A98SPM Supercardioid Polar Modifier should be used This device changes the pickup pattern from cardioid to supercardioid with minimal change of on axis microphone frequency response With the A98SPM the 98 becomes the smallest multi pattern micro phone available eliminating the need for costly multiple capsules The A98SPM is supplied with the SM98A A very high maximum sound pressure level allows use of the 98 with all acoustic instruments including drum kits and other percus sion as well as brass reed wind string and keyboa
3. At the XLR connector end of the preamplifier turn the slotted head setscrew fully inward counterclockwise and use a long nose pliers to carefully withdraw the connector from the case 2 Unsolder the three lead wires securing the XLR connector to the XLR board 3 Remove all four Phillips head screws from the preamplifier case three on the switch side one on the back 4 Grasp the end cap and withdraw the cap assembly pc board assembly and connecting wires and jacks from the case REASSEMBLING THE PREAMPLIFIER SM98A 1 Make sure the pc board is seated in the slot of the end cap and that no wires are pinched 2 Insert the end cap board assembly into the case XLR connect ing wires first Again take care not to pinch the wires connect ing the board to the end cap 3 Rotate the assembly inside the case until the four holes for Phil lips screws line up with the holes in the case 4 Replace the four Phillips screws 5 Resolder the three lead wires to the back of the XLR board as shown in Figure 11 RED WIRING TO XLR PC BOARD TERMINALS FIGURE 11 6 Replace the XLR board connector assembly in the case lining up the key in the connector with the slot in the case Take care not to engage the butterfly shaped ground contact in the key slot as it will prevent seating the connector properly 7 Insert the connector fully in the case until the slotted setscrew can be seen in the case hole tighten the setscrew
4. K PLASTIC PROTRUDING BUTTON SILVER METAL MICROPHONE SWIVEL ADAPTER SWIVEL ADAPTER MOUNTING FIGURE 7 4 Slide the cable through the slot in the cable guide and make a large loop see Figure 8 Then route the cable away from the stand to prevent transmission of noise and vibration through the cable 3 CABLE RETAINED IN GUIDE FIGURE 8 5 Tilt the adapter to aim the microphone as desired 6 To remove the microphone without disturbing the swivel adapt er and cable reach into the open slot of the adapter and press the cable lock button while disengaging the microphone PREAMPLIFIER PERMANENT MOUNTING SM98A The supplied mounting clamps are intended to hold the pre amplifier in place in permanent installations see Figure 9 Use either one or two clamps depending on location and application MOUNTING CLAMPS SM98A PREAMPLIFIER FIGURE 9 PREAMPLIFIER SWITCHES The preamplifier case contains two miniature recessed slide switches In the Lo Cut position the Flat Lo Cut switch provides a 12 dB rolloff below 80 Hz see Figure 1 The effects of the 0 10 dB Gain switch are described in the Preamplifier Output Clipping Level specifications INSTALLING THE A98SPM The A98SPM Supercardioid Polar Modifier is supplied with the SM98A To mount the microphone in an A98SPM Polar Modi fier proceed as follows IMPORTANT The white internal element of the A98SPM is essential to maintaining the supercardioid po
5. firmly by turning it clockwise OPTIONAL ACCESSORIES Drum Mounting Kit A98MKS Horm Clamp anera aE A98KCS Windscreen for A9Q8SPM 49A82 Supplied with SM98A Supplied with A98SPM REPLACEMENT PARTS LIST Reference Part Commercial Designation Number Description Alternate Preamplifier SM98A At 90B4220 ILP 1 Preamplifier Assembly None Al 80A476 Mounting Clamp 95A8077 Plug Assembly Male Miniature 3 Pin 90HV2600 XLR 3M Connector and Pc Board Assembly Microphone All States 3 4 HNB TB3M 1 R134 Microphone Cartridge Housing 49 Windscreen Microphone RK282 Swivel Adapter 95A8077 Plug Assembly Male Miniature 3 W Part of W1 WA330 Connector Female Miniature 4 Pin WM98 1 SM98A 90B3832 Cable connector assembly 4 6 m 15 ft two conductor shielded 3 pin female miniature connectors W1 WM98 90A4039 Cable connector assembly 1 52 m 5 ft two conductor shielded 3 and 4 pin miniature connectors TA4F 3 MINIATURE CONDENSER IMPEDANCE CONNECTOR CARTRIDGE CONVERTER TB3M RED DOT e 98 MICROPHONE MODEL WM98 CABLE MODEL SM98A CABLE MICROPHONE WIRING DIAGRAMS FIGURE 12 ee R101 a eet nc oul Roes gR103 a i Q103 RED R104 6108 033 5 033 5 c108 102
6. lar pattern Do not remove it 1 Unscrew the rear support from the front support by turning the rear support counterclockwise from bottom See Figure 10 2 Insert the microphone cable not connected into the rear sup port with its connector end contacting the support 3 Attach the front and rear supports together by turning the rear support clockwise from bottom Tighten sufficiently to prevent rattling CAUTION Do not overtighten Damage to the internal element may result A l FRONT MICROPHONE R SUPPORT SUPPORT A98SPM ASSEMBLY FIGURE 10 EAR CABLE AND CONNECTOR 4 Mount the swivel adapter on the microphone stand 5 Attach the microphone cable to the 98 A98SPM 6 Mount the Microphone Polar Modifier combination in the adapter as in steps 3 through 5 of the nstallation section 7 To remove the microphone assembly from the swivel adapter without disturbing the adapter and cable reach into the open slot of the adapter and press the cable lock button while disen gaging the microphone NOTE The Microphone Polar Modifier assembly can be used with or without its supplied acoustic foam windscreen When mounted on the SM98A A98SPM the windscreen not only pro vides excellent wind and pop protection but helps protect the A98SPM internal element from contamination DISASSEMBLING THE PREAMPLIFIER SM98A 1
7. ntom supply from sound reinforcement recording or broadcast equipment Optional accessories designed exclusively for use with the WM98 and SM98A are available These include the following e A98MK Drum Kit with gooseneck holder and clamp for mount ing the microphone directly on most drums e A98KCS Horn Mount a shock mounted clamp designed espe cially for securely mounting the 98 on a horn wind or reed in strument Microphone Features Smooth wide frequency response for accurate sound repro duction across the entire audio spectrum Symmetrical cardioid pattern uniform with frequency to 20 kHz Very high sound pressure level capability Very low distortion and high output clipping level Low susceptibility to RFI electrostatic and electromagnetic hum Smallest multi pattern microphone available without the need for multiple capsules e Rugged construction for outstanding reliability Cable detachable at both microphone and transmitter WM98 or preamplifier SM98A e Usable over very wide range of temperature and humidity Supplied with unique shock mount swivel adapter for mounting on conventional microphone stands or goosenecks Optional accessories to increase microphone versatility RELATIVE RESPONSE IN dB 1 FREQUENCY IN Hz TYPICAL FREQUENCY RESPONSE SM98A WITH A98SPM POLAR MODIFIER INSTALLED FIGURE 2 C Printed in U S A SPECIFICATIONS WM98 MICROPHONE circuit Figu
8. rd instruments The 98 can also be used with amplified guitars and keyboards The WM98 can be connected directly to a Shure wireless trans mitter using the supplied cable other transmitters must be checked for proper pin configuration condenser microphone power supply and connector type jot TT Th RELATIVE REGPONSE dB 2 50 100 506 2 000 5 000 10 000 20 000 TYPICAL FREQUENCY RESPONSE FIGURE 1 2002 Shure Incorporated 27A2738 BA The WM98 is supplied with a versatile shock mount swivel adapter for mounting on a standard 5 8 27 thread 8 1 47 m 5 ft cable with miniature 3 and 4 pin connectors and an acoustic foam windscreen to minimize wind noise in outdoor applications and from air moving equipment The Shure ILP 1 low distortion high clipping level phantom powered preamplifier is furnished with the SM98A microphone Additional included accessories are a windscreen for use with the microphone alone and a windscreen for use with the A98SPM a shock mount swivel adapter and a detachable 4 6 m 15 ft cable with miniature 3 pin connectors TASF type The ILP 1 preamplifier provides switchable gain of 0 or 10 dB and switch selectable Flat or Low Cut response to suit pickup for various instruments The Low Cut position is also useful to filter out low frequency noise from such sources as wind noise or air condi tioner or heater fans The ILP 1 can be powered by any 11 to 52 volt dc pha
9. re 6 with standard test SM98A MICROPHONE Type Condenser electret bias Frequency Response Figs 1 2 40 to 20 000 Hz Polar Pattern Figs 3 4 Unidirectional cardioid or supercardioid with A98SPM Supercardioid Polar Modifier Output Impedance 1200 Q Rated at 150 90 Q actual Recommended minimum load impedance 800 May be used with loads as low as 150 with reduced clip ping level Output Level 0 dB 1 volt per ubar Open Circuit Voltage 74 dB 0 2 mV Open Circuit Voltage 80 dB 0 10 mV Output Clipping Level 3 dBV 0 70 V 800 Q Load ILP 1 gain OdB dBV 1 0 V at 1 000 Hz 800 Q Load ILP 1 gain 10dB 7 dBV 0 45 V 150 Q Load ILP 1 gain OdB 13 dBV 0 22 V 150 Q Load 1 gain 10dB 21 dBV 0 09 V Total Harmonic Distortion Less than 1 134 dB SPL at 1 000 Hz Less than 1 132 dB SPL at 1 000 Hz Maximum SPL 145 dB 800 Q Load ILP 1 gainatOdB 155 dB 800 Load ILP 1 gain at 10dB 138 dB 150 Q Load ILP 1 gainatOdB 145 dB 150 Q Load ILP 1 gain at 10 dB 127 dB Dynamic Range maximum SPL 111 dB 121 dB 800 Q load ILP 1 gain at 0 dB to A weighted noise level Output Noise equivalent SPL 34 dB typical A weighted 40 dB typical C weighted 37 dB weighted per DIN 45 405 Hum Pickup electromagne
10. rille Amplifier Steel construction with matte black enamel finish Net Weight Microphone 12 g 0 4 oz Microphone 12 g 0 42 oz Amplifier 170 g 6 0 oz Certifications Conforms to European Union directives eligible to bear CE marking meets European Union EMC Immunity Requirements 50 082 1 1992 100 HZ 400 HZ 000 HZ e 5000 HZ 0000 HZ 15000 HZ TYPICAL POLAR PATTERNS FIGURE 3 tOO Hz me 400 Hz m 000 Hz 5000 Hz 10000 Hz 15 000 Hz TYPICAL POLAR PATTERNS SM98A WITH A98SPM INSTALLED FIGURE 4 Dimensions See Figure 5 l 31 8 mm 98 MICROPHONE 1 1 4 in 11 9 mm 4 L 15 32 in 138 mm a 5 7 16 in 20 mm 2 13 16 in ILP 1 PREAMPLIFIER SM98A WM98 1 52 m 5 ft SM98A 4 6 m 15 ft OVERALL DIMENSIONS FIGURE 5 WM98 STANDARD TEST CIRCUIT FIGURE 6 INSTALLATION To mount the 98 in the supplied swivel adapter h Mount the adapter on a microphone stand 2 Attach the microphone to the connector 3 Slip the cable through the slot in the adapter Slide the connec tor back through the hole until the protruding black cable lock button is in the open slot and the back of the microphone itself stops flush with the front of the holder Only the silver metal seg ment of the connector is held by the holder see Figure 7 BLAC
11. tic 5 dB equivalent SPL in a 1 mOe field 60 Hz Signal to Noise Ratio 60 dB at 94 dB SPL IEC 651 60 dB at 94 dB SPL IEC 651 Response Shaping N A Flat Lo Cut Preamp switch Lo Cut 12 dB rolloff below 80 Hz Phasing Positive pressure on microphone diaphragm pro duces positive voltage on pins 3 and 4 with re spect to pin 1 ground Positive pressure on microphone diaphragm produces posi tive voltage on pin 2 relative to pin 3 of preamplifier output connector Recommended Operating Volt age 1 5 to 6 V pin 2 to pins 3 and 4 11 to 52 Vdc Phantom operational down to 9 Vdc with re duced clipping level Current Drain 60 to 180 uA 2 2 mA current drain at 52 1 8 mA at 11 Vdc Environmental Conditions Operating Temperatures 18 to 57 C 0 to 135 F Storage Temperatures Relative Humidity 29 to 74 C 20 to 165 F 0 to 95 operating or storage Cable Microphone 1 12 m 3 ft 8 in attached two con Microphone 4 6 m 15 ft two conductor shielded with minia ductor shielded with miniature 3 and 4 pin con ture 3 pin female connector Switchcraft TA4F type on each nectors Switchcraft Tini Q Q type end to mate with microphone output and preamplifier input Case Microphone Brass construction with matte black Microphone Brass construction with matte black finish and finish and black stainless steel mesh grille black stainless steel mesh g
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