DIY Soundbar Nrog Ua-hauv DSP: 6 Cov Kauj Ruam (nrog Duab)

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:28

Ua lub tsev saib lub suab nrov niaj hnub no los ntawm 1/2 tuab kerf-bent plywood. Lub suab nrov muaj 2 txoj hauv kev (tso suab), 2 lub tshuab ua suab nrov, 2 lub tweeter, 2 woofers, thiab 4 lub tshuab hluav taws xob passive los pab txhawb qis qis hauv lub txee me me no. cov amplifiers muaj cov programmable Digital Signal Processor (DSP) uas kuv siv los tsim 2-txoj kev hla, kev cai EQs, thiab ntxiv cov ntses bass thaj tsam kom txhawb zog. DSP amp siv ADAU1701 tus txheej txheem uas teeb tsa tau siv Analog Devices SigmaStudio (software dawb)). Sib cais USBi programmer xav tau los rub tawm SigmaStudio program mus rau tus txheej txheem. Nco ntsoov muab qhov tsis zoo li qub rau $ 20, txwv tsis pub siv cov khoom kim dua los ntawm Analog Devices tuaj yeem siv tau.

Cov npe tseem ceeb:

• Woofers (x2): Dayton Audio ND91-4
• Tweeters (x2): Dayton Audio ND20FB-4
• Passive Radiators (x4): Dayton Audio ND90-PR
• Amplifier 1 (pub tweeters): Dayton Audio Kab-215
• Amplifier 2 (pub woofers): Tseeb Electronics Jab3-250
• Cov ntaub ntawv: 1/2 "tuab plywood (Tsev Depot)
• Pem hauv ntej baffle: 1/2 "tuab MDF (Tsev Depot)

Kauj Ruam 1: Kerf Khoov Qhov Rooj

Kuv xav tau ib lub thawv tshwj xeeb uas tsis zoo li "boxy" yog li kuv txiav txim siab siv cov txheej txheem khoov kerf kom ua tiav cov ntug tsis sib luag thoob plaws ib puag ncig. Kuv tau ua ob peb (9 rau ib qho khoov) nyias-kerf tsis hla kev txiav uas txiav tawm txog ~ 2 hli deb ntawm qhov saum npoo ntawm daim ntawv plywood. Qhov no tau txais ib puag ncig puag ncig nrog lub vojvoog khoov ntawm kwv yees li 1 ". Tshem cov khoom los ntawm ib lub ntsej muag ntawm cov ntoo, tso cai rau cov plywood kom yooj yim khoov. Kev saib xyuas yuav tsum tau ua txawm li cas los xij vim qhov khoov no tsis yooj yim. Kerf dabtsi yog khoov xav tau kom paub qhov tuab (kerf) ntawm koj cov hniav, cov tuab ntawm koj cov khoom, thiab lub vojvoog uas xav tau., kerf khoov lub laij lej muaj nyob tab sis lawv muaj kev txwv tsis pub txav ntawm txoj kab nkhaus khoov. Ib qho piv txwv tuaj yeem pom ntawm no:

Kauj ruam 2: Gluing ua ke

Kuv tsim qhov sib xyaw ntawm ~ 1: 1 pom plua plav thiab ntoo nplaum thiab siv nws txhawm rau txhawm rau txhawm rau txiav txhua qhov khoov. Kuv sim siv cov kua nplaum sib tov ua siab dawb vim tias cov khoov no tsis muaj cov khoom seem ntau thiab khoov tsis tau. Txawm li cas los xij, thaum cov kua nplaum sib tov qhuav, khoov tau zoo heev (tsawg kawg muaj zog txaus rau tus hais lus). Kuv kuj tau tsim ib nrab-ceg tawv sib koom ua ke uas tau siv los koom ua ke rau sab saum toj mus rau hauv qab. Koj tuaj yeem xav tias muaj ib daim ntev uas tsis sib thooj uas yuav ze rau 90 ntev thiab nyuaj rau tuav.

Kauj Ruam 3: Ua MDF Pem Hauv Ntej Baffle

Kuv siv lub plunge router thiab lub voj voos txiav jig los txiav tawm lub qhov rau txhua lub woofer thiab lub tshuab hluav taws xob passive. Kuv siv tus loj forstner me ntsis thiab laum xovxwm rau qhov tweeter qhov. Kuv kuj tseem siv qhov hloov pauv me ntsis kom du tawm cov npoo ntawm txhua lub qhov ntxiv rau sab nrauv ntawm lub ntsej muag. Kuv tau teeb tsa lub tweeter kom deb sib nrug los ntawm ib leeg kom ua tau zoo dua tab sis kuv tsis paub meej tias muaj kev cuam tshuam ntau npaum li cas.

Kauj Ruam 4: Mounting Speakers thiab Fabric Wrap

Txhawm rau ua kom tiav cov baffle, kuv rov qab teeb tsa txhua lub woofers, lub tshuab hluav taws xob passive, thiab tweeters siv 1/2 ntoo ntsia hlau. tus qauv ntawm txhua lub gasket los laum kuv qhov ntsuas qhov ntsuas qhov ntsuas - tshem tawm kev kwv yees.

Kauj Ruam 5: Rear Baffle + Electronics

Lub nraub qaum nraub qaum muaj cov mitered ntug uas yog siv los tsim cov dej ntws tawm kom zoo nrog lub ntim. Kuv siv lub chamfer me ntsis thiab lub rooj router los tsim 45 degree chamfer thiab siv tib lub npuas ua npuas ncauj rau tsim lub foob. Cov khoom siv hluav taws xob (2 lub tshuab hluav taws xob, DC lub zog tso rau lub mloog pob ntseg, lub tso suab tso rau hauv lub mloog pob ntseg, thiab 2 LEDs) tau teeb tsa nyob rau sab nraub qaum. Cov khoom siv hluav taws xob tau teeb tsa nyob rau hauv kab noj hniav kaw nyob hauv nruab nrab ntawm lub thaiv uas cais sab laug/sab xis.

Kauj Ruam 6: DSP Programming/tuning

Cov Txheej Txheem Digital Signal (DSPs) tau siv dav hauv feem ntau cov neeg siv khoom siv suab nrov. Lawv qhov txiaj ntsig zoo tshaj plaws yog tias lawv lees txais cov tswv yim digital thiab tuaj yeem siv rau ntau lub suab sorround suab. Txog qhov haujlwm no, Kuv tau siv cov tswv yim sib piv vim tias lawv yooj yim los tsim nyob ib puag ncig. The Sure Electronics Jab3-250 amplifier tau nruab nrog ADAU1701 tus txheej txheem uas muaj 2 lub tswv yim ADCs (analog-rau-digital hloov pauv) thiab 4 tso tawm DACs (digital-to-analog converters). Kuv siv ob lub DAC tso tawm los pub rau txhua tus tweeter thiab ob DACs los pub txhua lub woofer. Duab ntawm kuv qhov SigmaStudio cov duab kab ke tau txuas nrog thiab qee qhov kev thaiv tseem ceeb siv tau piav qhia hauv qab no:

Kev hloov kho cov tswv yim: siv los txo qhov ntim khoom nkag rau txhua qhov channel. Kuv pom tias qhov no yog cov kauj ruam tseem ceeb uas xav tau rau Dynamic Bass Boost feature kom ua haujlwm (piav qhia tom qab).

Parameteric EQ: Kuv tau siv lub xov tooj app hu ua "Advanced Spectrum Analyzer" txhawm rau sau qhov nrawm nrawm (20Hz - 20kHz) thiab kwv yees kwv yees ntsuas cov lus teb ntawm tus hais lus yam tsis muaj qhov sib npaug. Qhov no tsis yog txoj hauv kev raug tshaj plaws, txawm li cas los xij, nws nrawm thiab nws muab rau kuv pib qhov zoo yam tsis tau nqis peev ntau dua cov cuab yeej xws li ntsuas lub microphone thiab daim npav suab rau kuv lub laptop. Kuv npaj yuav ntsuas qhov zoo dua yav tom ntej thiab siv software ntxiv xws li Chav EQ Wizard (https://www.roomeqwizard.com) los pab kuv suav qhov EQ raug. Txog tam sim no, Kuv tsim qhov kev cai parametric EQ uas txo qis ntim ntawm 500hz thiab 4000hz. Kuv pob ntseg hnov qhov zaus no nrov dua li lwm tus. Tus hais lus tau hnov zoo dua (rau kuv) nrog lub ntim hauv qhov no tau qis dua. Ua ntej thiab tom qab zaus teb cov lus nkhaus tau txuas nrog. Cov no tsis yog ntsuas qhov tseeb ntawm tus hais lus cov lus teb thiab feem ntau yuav tsis raug tab sis kuv tau xaiv los suav nrog lawv kom kuv tuaj yeem hais meej tias DSP muaj txiaj ntsig zoo li cas thaum hloov suab. Hauv cov kab ntawv txuas, kab kab ntxwv sawv cev rau cov lus teb siab tshaj plaws sau tseg thiab kab dawb sawv cev rau lub sijhawm tiag (uas tuaj yeem tsis quav ntsej).

Crossover: Kuv siv qhov kev txiav txim zaum thib 4 Linkwitz-Riley lim teeb ntawm 3, 000 Hz rau qhov lim qis dhau ntawm woofers thiab lim siab lim ntawm lub tweeters. Ib ntawm cov txiaj ntsig loj ntawm DSP yog tias nws tuaj yeem tsim cov lim lim zoo li qhov no yooj yim. Ua qhov kev txiav txim siab thib plaub Linkwitz-Riley crossover xav tau cov khoom siv ntxiv uas tuaj yeem yooj yim ntxiv rau tus nqi ntawm DSP ($ 35).

Dynamic Bass Boost: Dynamic Bass Boost block muab kev txhawb zog uas txawv nrog qib-teeb liab theem: qib qis xav tau, thiab tau txais, ntau ntses bass thaj tsam ntau dua qib. Siv qhov hloov pauv -Q lim, qhov thaiv no hloov kho qhov nce ntawm qhov nce. Cov theem nkag yuav tsum raug txo kom thiaj li txhawb tau txoj haujlwm. Qhov no txhais tau tias tus neeg hais lus tsis nrov nrov ntxiv lawm, txawm li cas los xij kuv ntseeg tias kev lag luam tawm muaj nqis. Ntawm 50W / channel, muaj lub zog txaus.

Nov yog kuv thawj qhov haujlwm nrog DSP thiab SigmaStudio thiab kuv tseem tab tom kawm. Kuv tseem yuav hloov kho Cov Lus Qhia no ntxiv thaum kuv kho lub suab. Kuv vam tias koj nyiam qhov kev tsim!