Abra AK-30 User manual
DIY Mini Amplifed Speaker KitDIY Mini Amplifed Speaker Kit
AK-30
1
DIY Mini Amplifed Speaker Kit Assembly Instrucons
1. Locate the two PCB’s and the enclosed component set for each.
LocatethenysurfacemountamplierIC’sinthecomponentsetthataretobemountedtotheboomofthe
PCB’s.
SoldertheICamplierstotheboomICpadsmakingsurethatthedotontheICisatpin1.
(SeeFig.1)
2. RefertotheenclosedPCBcomponentlayoutdiagramfortheresistorvalueplacementandthecorrectorientaon
fortheelectrolyccapacitorsonthePCBandsoldertheminplace.
Useanohmmetertomeasuretheresistorvaluesifnotsurewhichiswhich.
Notethatthereisa50KpotenometerinRP1anda10KpotenometerinRP2posion.
TheVUmeterLED’sD1,D2,D3aregreenD4isyellowandD5isred.
(SeeFig.2)
3. Locatethetwolengthsofredandblackwires.
SoldertheredtoV0+andtheblacktoV0-onP3ofbothPCB’s.
Thesearespeakeroutputsthatwillbeconnectedtothespeakers.
(SeeFig.2)
Fig.1
Fig.2
2
4. Locatethethreeconductorandfourconductorwirelengths.
Selectthethreeconductorwire(red,yellow,black)andcutitinhalf(twoequalparts).
Thiswillbeusedforthe5Vpowerconnecon.
Stripbothendstoexposethewires.
Cutotheyellowwiresonbothendsofbothwires.
Solderaredwiretothe+5VandablackwiretotheGNDconnectorP1oneachoftheboards.
5. Selectthefourconductorwire(red,green,yellow,black)andcutitinhalf(twoequalparts).
Thesewillbeusedfortheaudioinputandwillbeconnectedtothe3.5mmstereoconnector.
Stripbothendstoexposethewires.
Cutotheredwiresonbothendsofbothwires.
Ononeofthecablescutotheyellowoneachendleavingblackandgreenwires.
Ontheothercablecutothegreenoneachendleavingblackandyellowwires.
ConnecttheyellowwiretoIN+andtheblackwiretoIN-onP2ofoneoftheboards
ConnectthegreenwiretoIN+andtheblackwiretoIN-onP2oftheotherboard.
(SeeFig3)
6. Peelotheprotecvepapercoangsontheacrylicspeakerenclosurepanels.
Mountthespeakerstotheirfaceplatesusingthelargerdiameterscrewsandnuts.
SoldertheredVO+andtheblackVO-wiresonthePCB’stothespeakerterminals.
7. Installfourbrassstandoswithnutstoeachofthetworearpanels.
MountthePCB’stothestandoswiththelargerscrewswiththewiresfacingtheexitcutout.
8. Insert4oftheM2screwsintotheopeningsonthespeakerfaceplate.
AachanM2nuttoteachofthescrews.
Proceedtoinstalleachofthefoursidetopandboompanelstothespeakerpanellockinginthescrewsand
nutsintothecut-outsonthepanels.
9. Takethetwored+5VandblackGND(P1)powerwiresfrombothPCB’sandtwistthetworedwiresandthetwo
blackwirestogether.
Solderthetwored+5Vwirestothecenterpinofthe2.1mmDCpowerconnectorprovidedandthetwoGND
wirestotheoutsidegroundconnecon.
Fig.3
3
10. Takethetwoaudioinputwiresandtwisttheblackgroundleadstogether.
Solderthegreenandyellowwirestothetwoinside3.5mmstereoconnectorpinsrespecvely.
Soldertheblackwirestotheoutsidegroundconnecon.
(SeeFig.4)
11. Connectthe3.5mmtoanaudiosource.
ConnecttheUSBconnectortoacomputerportorUSBadapterandplugitintothe2.1mmDCpowerconnector
justwiredtopowerup.
Setthe50KRP1potenometertofullclockwiseposionformaximumvolume.
Withpoweronandthespeakersplaying,adjustthe10KRP2potenometersothattheredtopmostLEDVU
indicatorjustcomesonatmaximumvolume.
12. Runthepowerandaudioinputwiresthroughthecutoutontherearpanelandinstallthe
rearpanelusingtheremainingM2screwsandnuts.
(SeeFig.5)
13. Enjoythesound.
Fig.4
Fig.5
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