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Preamplifier

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140: 43: 480: 1214: 215:(when current is drawn from the output there is minimal change in the output voltage). It is used to boost the signal strength to drive the cable to the main instrument without significantly degrading the 1142: 1132: 722: 512: 547: 175:. Without this, the final signal would be noisy or distorted. They are typically used to amplify signals from analog sensors such as 370:
The circuit inside of a hard drive connected to the magnetic heads or the circuit inside of CD/DVD drive which connects to the
223:, when the gain of the preamplifier is high, the SNR of the final signal is determined by the SNR of the input signal and the 1193: 484: 107: 79: 167:
into an output signal strong enough to be noise-tolerant and strong enough for further processing, or for sending to a
742: 126: 86: 557: 727: 319:, which is then sent to the power amplifier. With instrument amplifiers, the preamp is often designed to produce 1238: 505: 64: 93: 912: 537: 60: 17: 1107: 932: 849: 773: 611: 192: 1127: 542: 417: 386: 75: 1243: 874: 783: 1097: 995: 975: 816: 641: 580: 498: 407: 280: 1218: 1188: 220: 391:
Due to its unique coloration, some preamplifiers can be emulated in software to be used in mixing.
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In an audio system, they are typically used to amplify signals from analog sensors to
927: 811: 788: 649: 164: 139: 1102: 1041: 1000: 907: 884: 854: 699: 659: 529: 521: 412: 364: 331: 268: 243: 212: 1076: 1051: 1036: 937: 922: 897: 626: 621: 457: 442: 260: 211:(requiring only a minimal amount of current to sense the input signal) and a low 208: 180: 168: 1112: 1071: 1066: 1061: 1021: 839: 834: 570: 288: 1232: 1199: 1168: 869: 803: 747: 717: 654: 631: 565: 338: 942: 902: 844: 737: 707: 664: 586: 224: 1183: 1178: 1137: 1122: 1046: 1031: 990: 947: 763: 342: 272: 271:
gain. The power amplifier provides the higher current necessary to drive
219:(SNR). The noise performance of a preamplifier is critical. According to 172: 30:"Preamp" redirects here. For the device used in professional audio, see 1173: 1163: 980: 768: 732: 601: 596: 371: 353: 327: 296: 284: 276: 256: 176: 793: 712: 361: 42: 985: 962: 952: 892: 679: 490: 292: 1081: 826: 264: 183:. Because of this, the preamplifier is often placed close to the 27:
Electronic amplifier that converts weak signal into strong signal
479: 184: 287:. Preamplifiers are often integrated into the audio inputs on 1147: 1117: 381:
circuit used to null the effects of mismatch offset in most
917: 382: 684: 1026: 67:. Unsourced material may be challenged and removed. 267:gain (e.g., from 10 mV to 1 V) but no significant 230:Three basic types of preamplifiers are available: 1230: 203:An ideal preamp will be linear (have a constant 506: 275:. For these systems, some common sensors are 1133:Professional Lighting and Sound Association 723:Comparison of analog and digital recording 513: 499: 450: 127:Learn how and when to remove this message 299:. They can also be stand-alone devices. 263:(power amp). The preamplifier provides 207:through its operating range), have high 138: 14: 1231: 308:The integrated preamplifier in a foil 259:. The second amplifier is typically a 1194:New Interfaces for Musical Expression 494: 341:or channel strip built into an audio 520: 65:adding citations to reliable sources 36: 24: 25: 1255: 743:Reel-to-reel audio tape recording 472: 143:An example of a typical high-end 1212: 478: 250: 41: 728:Experimental musical instrument 52:needs additional citations for 443:Merriam-Webster.com Dictionary 430: 326:A stand-alone unit for use in 234:current-sensitive preamplifier 198: 13: 1: 913:Electronic musical instrument 423: 244:charge-sensitive preamplifier 1219:Record production portal 1108:Institute of Broadcast Sound 387:analog-to-digital converters 7: 1128:Musical Electronics Library 418:Logarithmic resistor ladder 395: 302: 10: 1260: 875:Sound reinforcement system 784:Sound reinforcement system 29: 1208: 1156: 1098:Audio Engineering Society 1090: 1014: 996:Software effect processor 976:Digital audio workstation 961: 883: 825: 817:Digital signal processing 802: 756: 698: 640: 581:Digital audio workstation 556: 528: 408:Instrumentation amplifier 337:As part of a stand-alone 187:to reduce the effects of 1189:Professional audio store 1091:People and organizations 1077:Sound recording engineer 607:Microphone preamplifier 385:comparator-based flash 315:The first stages of an 32:Microphone preamplifier 548:Electronic and digital 458:"Definition of preamp" 323:or distortion effects. 148: 1239:Electronic amplifiers 238:parasitic-capacitance 227:of the preamplifier. 217:signal-to-noise ratio 163:that converts a weak 142: 1006:Software synthesizer 971:Digital audio editor 757:Playback transducers 617:Multitrack recording 487:at Wikimedia Commons 352:amplifier used with 317:instrument amplifier 161:electronic amplifier 61:improve this article 485:Audio preamplifiers 402:Low-noise amplifier 310:electret microphone 1057:Re-recording mixer 860:Keyboard amplifier 576:Binaural recording 446:. Merriam-Webster. 379:switched capacitor 281:instrument pickups 155:, also known as a 149: 1244:Audio engineering 1226: 1225: 1032:Guitar technician 928:Music workstation 812:Digital recording 789:Speaker enclosure 708:8-track cartridge 650:Phonograph record 483:Media related to 165:electrical signal 137: 136: 129: 111: 16:(Redirected from 1251: 1217: 1216: 1215: 1103:Goji Electronics 1042:Monitor engineer 1001:Software sampler 908:Electronic drums 885:Electronic music 855:Guitar amplifier 700:Analog recording 660:Compact cassette 622:Music production 530:Music technology 522:Music technology 515: 508: 501: 492: 491: 482: 466: 465: 454: 448: 447: 434: 413:Buffer amplifier 332:recording studio 213:output impedance 132: 125: 121: 118: 112: 110: 69: 45: 37: 21: 1259: 1258: 1254: 1253: 1252: 1250: 1249: 1248: 1229: 1228: 1227: 1222: 1213: 1211: 1204: 1152: 1086: 1052:Record producer 1037:Mixing engineer 1010: 957: 923:MIDI controller 898:Circuit bending 879: 821: 798: 774:Monitor speaker 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50:This article 48: 44: 39: 38: 33: 19: 18:Pre-amplifier 1210: 943:Sound module 903:Drum machine 845:Effects unit 738:Player piano 665:Compact disc 587:Effects unit 461: 452: 441: 432: 273:loudspeakers 254: 240:preamplifier 229: 225:noise figure 202: 193:interference 156: 153:preamplifier 152: 150: 123: 114: 104: 97: 90: 83: 71: 59:Please help 54:verification 51: 1184:Music store 1179:Home cinema 1138:Robert Moog 1123:Max Mathews 1047:Piano tuner 1015:Professions 991:Scorewriter 948:Synthesizer 764:Loudspeaker 372:photodiodes 343:mixing desk 297:sound cards 285:phonographs 277:microphones 199:Description 177:microphones 173:loudspeaker 1233:Categories 1174:Home audio 1164:Audiophile 981:GarageBand 827:Live music 769:Headphones 733:Phonograph 602:Microphone 597:Headphones 543:Electrical 538:Mechanical 424:References 354:television 328:live music 257:line level 87:newspapers 938:Sequencer 865:PA system 794:Subwoofer 779:PA system 713:Amplifier 675:Hard disk 592:Equalizer 362:satellite 356:receiver 321:overdrive 293:DJ mixers 159:, is an 986:ProTools 963:Software 953:Theremin 893:Chiptune 850:Foldback 680:MiniDisc 396:See also 365:receiver 350:masthead 303:Examples 1082:Tape op 933:Sampler 358:antenna 269:current 265:voltage 181:pickups 101:scholar 1196:(NIME) 870:Reverb 295:, and 283:, and 185:sensor 171:and a 157:preamp 145:stereo 103:  96:  89:  82:  74:  1148:STEIM 1143:SMPTE 1118:IRCAM 583:(DAW) 462:PCMAG 404:(LNA) 367:dish. 360:or a 189:noise 108:JSTOR 94:books 918:MIDI 690:Opus 383:CMOS 330:and 205:gain 191:and 179:and 80:news 685:MP3 670:DAT 63:by 1235:: 1027:DJ 460:. 440:. 377:A 348:A 291:, 279:, 195:. 151:A 514:e 507:t 500:v 464:. 374:. 345:. 312:. 246:. 130:) 124:( 119:) 115:( 105:· 98:· 91:· 84:· 57:. 34:. 20:)

Index

Pre-amplifier
Microphone preamplifier

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"Preamplifier"
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stereo
electronic amplifier
electrical signal
power amplifier
loudspeaker
microphones
pickups
sensor
noise
interference
gain
input impedance
output impedance
signal-to-noise ratio
Friis's formula
noise figure

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