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VPR Alliance standards dictate voltage at +/- 16 volts, with +48 volts for phantom power, with maximum current draw of 130, 130 and 5 mA respectively per slot. Each module has three input and output pins, for +4db, -2dB and negative balanced signals. The physical dimensions are
85:
In the mid-1970s, some recording engineers began removing individual processor modules from API mixing consoles and installing them into homemade mounting systems. In 1978, Datatronix licensed the rights to API from the owners and manufactured a 10-slot 500-series chassis.
93:. In response to increasing demand, Wolff introduced the API Lunchbox, a portable chassis for housing 500-series modules in 2-slot, 6-slot, and 10-slot configurations. Later, API would establish ownership of the Lunchbox trademark.
38:
chain, with individual modules added or changed as budget allows. Many 500-series chassis also offer portability, allowing a recording engineer to bring their desired signal processing chain to any recording session.
26:
system consisting of a combination of 500-series modules installed within a 500-series chassis (or rack), with the chassis providing power and audio connections for the individual modules. Originally invented by
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Popularity in the 500-series format surged in the mid-2000s, and by 2020, there were over five hundred different 500-series modules on the market from API and numerous third-party manufacturers, including
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63:, the first 12-track recording studio in New York City. The console's modular design, invented by Walker, became the 500-series format, and Walker and Lindauer co-founded
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In 2006 API established the VPR Alliance, which established 500-series specification standards to ensure compatibility with API 500-series rack systems.
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500-6B 500-series
Lunchbox System with 512C Mic/Line Preamp (×2), 550B 4-band EQ (×2), and 525 Compressor (×2)
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The modular nature of the 500-series format allows individual modules to be combined to create a customized
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129:(5.25") and multiples of 1.5" wide, with 15-pin edge-connector pin configuration of 500-series modules.
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co-founder Saul Walker, today numerous companies manufacture 500-series format products.
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78:, the 527 compressor, the 550A and 550B semi-parametric
266:"The Twist of Fate That Led to the Audio "Lunchbox""
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55:In 1967, Lou Lindauer and Saul Walker designed a
380:
89:In 1985, the assets of API were purchased by
8:
148:
146:
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142:
1320:
859:
408:
387:
373:
365:
70:API's 500-series modules include the 512C
182:"Remembering Audio Pioneer Saul Walker"
138:
22:is a standardized format for a modular
7:
1614:Global Recording Artist of the Year
1582:Highest-grossing live music artists
14:
319:"500 Module Series Specification"
180:Fortune, Evan (21 October 2016).
82:, and the 560 graphic equalizer.
1743:
1742:
1729:
759:Artists and repertoire (A&R)
490:Universal Music Publishing Group
291:Houghton, Matt (November 2020).
264:Beacham, Frank (14 April 2017).
207:Alexander, Dan (13 March 2012).
153:Houghton, Matt (November 2020).
1180:Entertainment Monitoring Africa
155:"Choosing A 500-series Chassis"
1680:Largest recorded music markets
1587:Highest-grossing concert tours
1:
293:"Choosing 500-series Modules"
239:"2017 TECnology Hall of Fame"
1736:Record production portal
552:Independent UK record labels
360:NAMM Oral History Collection
1770:Sound production technology
1604:Most-attended concert tours
1801:
1619:Wealthiest musical artists
1472:Best-selling music artists
61:Apostolic Recording Studio
1723:
1190:New Zealand singles chart
65:Automated Processes, Inc.
29:Automated Processes, Inc.
1660:Christian music industry
1175:GfK Entertainment charts
819:Professional audio store
299:. SOS Publications Group
209:"A Brief History of API"
1067:Music streaming service
500:Disney Music Publishing
245:. NAMM Foundation. 2017
213:danalalexanderaudio.com
1609:Most-attended concerts
1577:Highest-paid musicians
272:. The Broadcast Bridge
270:thebroadcastbridge.com
52:
1690:Most valuable records
1685:Most expensive albums
1640:Album-equivalent unit
1170:Italian singles chart
1027:Promotional recording
495:Warner Chappell Music
485:Sony Music Publishing
480:BMG Rights Management
356:Saul Walker Interview
50:
1785:Mechanical standards
1665:Environmental impact
1565:Best-selling singles
578:Digital music stores
1695:Music certification
1675:Largest music deals
1553:Best-selling albums
1386:The Country Network
1165:Irish Singles Chart
814:Musical instruments
1208:SNEP singles chart
983:Extended play (EP)
754:Album cover design
53:
1757:
1756:
1700:Parental Advisory
1655:Bootleg recording
1645:A-side and B-side
1502:
1455:
1454:
1371:The Music Factory
1213:Sverigetopplistan
1137:Argentina Hot 100
1103:Music competition
1093:Concert residency
1032:Phonograph record
1002:
962:
961:
789:Music and fashion
774:Entertainment law
642:
641:
603:Virgin Megastores
405:and organizations
243:www.tecawards.org
103:Solid State Logic
36:signal processing
20:500-series format
1792:
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1500:
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1218:UK singles chart
1150:Canadian Hot 100
1042:Compact cassette
980:
927:Session musician
902:Hip hop producer
860:
794:Music journalism
726:Rhythm and blues
444:IFPI (worldwide)
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349:Official website
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219:on 13 March 2012
215:. Archived from
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24:signal processor
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1305:Top of the Pops
1270:Musica e dischi
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991:Cassette single
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912:Record producer
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829:Radio promotion
799:Music publisher
784:Music executive
779:Music education
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67:(API) in 1969.
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1498:United Kingdom
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1145:Brasil Hot 100
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954:Sound engineer
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917:Rhythm section
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849:Talent manager
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666:Easy listening
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324:. VPR Alliance
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297:Sound On Sound
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159:Sound On Sound
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1506:United States
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1291:Rolling Stone
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1160:G-Music chart
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932:Backup singer
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127:3U vertically
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21:
16:
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1727:
1705:Record sales
1670:Hidden track
1460:Achievements
1444:
1439:The X Factor
1437:
1430:
1423:
1418:Star Academy
1416:
1409:
1402:
1303:
1296:
1289:
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1275:
1268:
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1240:
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1227:Publications
1195:
1155:Circle Chart
1142:
1134:
1126:
1088:Concert tour
1011:Double album
937:Ghost singer
922:Orchestrator
907:Horn section
834:Record label
769:Distribution
676:Experimental
648:Major genres
634:Ticketmaster
582:iTunes Store
539:
538:
516:
515:
434:Music Canada
326:. Retrieved
313:
301:. Retrieved
296:
286:
274:. Retrieved
269:
259:
247:. Retrieved
242:
233:
221:. Retrieved
217:the original
212:
202:
190:. Retrieved
188:. Future plc
185:
175:
163:. Retrieved
161:. Future plc
158:
123:
120:
117:VPR Alliance
95:
88:
84:
72:preamplifier
69:
54:
33:
19:
17:
15:
1715:White label
1650:Backmasking
1467:Music award
1446:Rising Star
1242:HitQuarters
1121:ARIA Charts
1037:Eight-track
1022:Music video
999:Maxi single
947:Ghostwriter
942:Vocal coach
897:Disc jockey
870:Arrangement
839:Record shop
809:Music venue
804:Music store
764:Disc jockey
624:Live Nation
619:CTS Eventim
541:Independent
1764:Categories
1570:by country
1558:by country
1316:Television
1298:Smash Hits
1203:Sino Chart
1076:Live shows
987:12" single
875:Songwriter
863:Production
671:Electronic
612:Live music
473:Publishers
454:PROMUSICAE
186:MIX Online
133:References
91:Paul Wolff
80:equalizers
76:compressor
74:, the 525
1635:Album era
1529:Brazilian
1501:(Females)
1432:The Voice
1405:franchise
1366:MuchMusic
1331:Channel V
1249:Hot Press
1235:Billboard
1143:Billboard
1135:Billboard
1127:Billboard
995:CD single
892:Conductor
844:Road crew
824:Promotion
747:and roles
629:LiveStyle
566:Retailers
529:Universal
1748:Category
1592:by women
1425:The Four
1411:Popstars
1324:Channels
1256:Kerrang!
885:Lyricist
880:Composer
1544:Swedish
1539:Italian
1534:British
1524:Belgian
1510:Genre:
1488:Germany
1483:Finland
1198:Top 100
1129:Hot 100
1083:Concert
1057:Airplay
1015:Mixtape
970:formats
968:Release
745:Sectors
711:New Age
691:Hip hop
661:Country
598:Kaspien
547:Concord
328:25 June
43:History
1478:Brazil
1395:Series
1113:Charts
978:Single
721:Reggae
686:Gospel
573:Amazon
534:Warner
303:8 July
276:8 July
249:8 July
223:8 July
192:8 July
165:8 July
1628:Other
1597:Latin
1514:Latin
1493:Japan
1006:Album
736:World
706:Metal
701:Latin
656:Blues
518:Major
322:(PDF)
107:Aphex
1476:In:
1403:Idol
1376:Viva
1361:Tr3s
1356:MTV2
1346:Mnet
1341:Fuse
1263:Mojo
731:Rock
696:Jazz
681:Folk
588:Fnac
557:AAMG
524:Sony
464:SNEP
459:RIAA
439:FIMI
424:BVMI
419:ARIA
330:2023
305:2022
278:2022
251:2022
225:2022
194:2022
167:2022
99:Neve
59:for
18:The
1381:VH1
1351:MTV
1336:CMT
1277:NME
1052:DVD
716:Pop
593:HMV
449:PMB
429:BPI
358:at
111:dbx
1766::
1047:CD
1013:,
997:,
993:,
989:,
985:,
545::
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295:.
268:.
241:.
211:.
184:.
157:.
141:^
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332:.
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280:.
253:.
227:.
196:.
169:.
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