DIY Active Home Theater Subwoofer - GRS 12SW-4 and Bash 300S Plate Amplifier

A custom made PVC pipe ported subwoofer enclosure to house a GRS 12SW-4 12 inch 4 Ohm poly cone subwoofer and to be powered by a Bash 300S 300w RMS digital subwoofer plate amplifier. Previous plate amplifier, O Audio, who manufactures the similar amplifier and also sold them on Parts Express as well. So don't be confused about Bash and O Audio subwoofer plate amplifiers.
A customer sent me the two main components. Tested the plate amplifier and seems only to output about 210w RMS, expecting to have a 300w RMS as it was advertised. But not bad. Since the GRS replacement subwoofer is only rated to accept about a 150w RMS musical power. Also extracted the T/S parameters of the GRS 12SW-4 12" subwoofer. Data is now archived and let me know if you need them.
And as usual if you need the enclosure dimension, just click this link - www.tinkercad.com/things/afPR... You need to create an account and login to TinkerCad before you can copy, edit and see the dimensions of the 3D schematic.
I flush mounted the subwoofer and installed rubber footing at the bottom of the box. Plate amplifier also seats on a routed MDF flush mount at the back as well for a cleaner and more professional look and feel.
If you are fond watching previous videos about me using T-nuts and machine head bolts, this time I used drywall screws to attach the woofer and Allen head wood screws on the plate amplifier. That is because my time is so limited as well as the customer's budget.
I used a roundover router bit to give the box edges a smooth finish. And pre-painted the enclosure a generous amount of lacquer sanding sealer to seal the MDF pores in order for a very smooth paint job later.
Wanting to achieve a piano-smooth wet sanded finish so I tried to bring the box to a nearby automotive body and paint shop to do the task. I don't know what you think how the project turn out so please let me know what you think by commenting down in the comment section.
Also, please consider subscribing to my channel if you want to see and hear the bass test video next week. I'll be testing the active subwoofer with bass-heavy movie trailers and music. So see you all in the next video!

[@laurenzspeakergm9979]

Wow that's a huge subwoofer, I can't wait to hear the sound!

[@chrclmnky]

You and me both!

[@peterorion651]

Ang ganda talaga ng mga gawa mo boss. Ang sarap talaga pag skilled ka... ang hirap ng walang talent.

[@chrclmnky]

Zero skills din ako sir sa simula. 🤭

[@anxiety1209]

Same even today i still have no skill for building speaker boxes but table saw makes the job way way easier than using a jig saw to cut the wood

[@JuanManuel123ify]

Magnífico trabajo mi querido amigo, como siempre nos deleita con una obra de arte.....También me he alegrado mucho de poder ver a sus hermosas mascotas y su familia....Gracias de corazón por su gran labor divulgativa y sus estupendas aportaciones a la comunidad y al canal.....Un gran abrazo fraternal y muchas bendiciones desde Las Islas Canarias (España)............................................

[@rgidayawan]

As always, a very nice build.

[@chrclmnky]

Thanks again!

[@KGrasso89]

Very nice job I bet it sounds excellent! I'm struggling to learn box design right now. I never realized how critical box design is to get good sound and output from a subwoofer until recently.

[@chrclmnky]

Thanks. A little more research and tests will get us there.

[@vincentgibson3049]

Awesome build. Proper!

[@chrclmnky]

Oh yeah!

[@user-oq1lv7ge2j]

Приятно смотреть на работу профи! Всё делается с расчётами и по канонам жанра! Слава богу, нет аудиофильских соплей и нытья про серебро в проводах 🤟👍

[@chrclmnky]

Thanks for the feedback. 🐵😎

[@black_flea]

Great job👍

[@rolandthebastard]

Love the prep and paint part. Just a bunch of bros hanging out helping their m8 get some bass.

[@chrclmnky]

Yeah they are so very helpful. 😂

[@edud8452]

Nice👍the paint job looks great😎

[@chrclmnky]

Thanks E Dud

[@mhnoni]

This looks beautiful.

[@chrclmnky]

@@mhnoni thanks

[@libin6127]

Master of all DIY work in
Philippines
💯💯💯💯👌👌👌👌
Hai from Qatar

[@chrclmnky]

Thanks Mat. 🙂 Cheers!

[@28dens]

Ang ganda ng pagkakagawa pulidong pulido

[@manyuvihan3899]

“Again Great Video” 👍🏻 Bro

[@chrclmnky]

Thanks again! 😎😍

[@jaime4i]

thank you for sharing sir. time to change the enclosure of my box

[@chrclmnky]

😎

[@ajithmanda395]

Superb work

[@chrclmnky]

Thank you Ajith

[@_Thale_]

Already liking this one👌🏿

[@chrclmnky]

Thanks brother

[@mr.elturo1252]

THE BEST ka talaga IDOL Gumawa Sobrang linis🤗🤗

[@chrclmnky]

Matsalams po

[@francistordiy223]

Quality talaga sir mga gawa mo. yung 10'' dual ported na ginawa ko na design mo ganda parin, daming nagagandahan sa bass ang linis ng buga kahit direct source lang 😃

[@chrclmnky]

Matsalams po sir. Keep building and enjoy. 😎🤓👌

[@MartinTeerly]

I have Kenwood sw501 from 90s looks same as this. Very good sub. Banging the whole house

[@chrclmnky]

😎😎🤩🤩

[@Matthew_T24]

amazing Work😍

[@chrclmnky]

Thanks Matt

[@markschumacher6676]

Very nice video 👏

[@chrclmnky]

Thanks Mark

[@MacMilli]

this is incredible good job bruh

[@chrclmnky]

Thanks a many MacMilli

[@cbonner1964]

Really nice u got skills 🔥

[@chrclmnky]

@@cbonner1964 thanks Carl

[@jettrudeseansoriano7525]

Ganda talaga mga gawa mo bro

[@chrclmnky]

Thanks po

[@UncleBlue_11]

I think audio companies should send their engineers to you for some training why lie😅😅.i love the perfection you bring out to every single project you undertake...from the specs, till the end product is just satisfying to watch😍.

[@chrclmnky]

Thank you Uncle Blue. 😁

[@the_barboza]

Como sempre mandando super bem, parabéns pelo otimo projeto.
As always doing very well, congratulations on the great project. :)

[@chrclmnky]

Thank you Edu

[@joharyakisa3282]

Gaganda Ng mga gawa mo idol😊❤️

[@chrclmnky]

Thanks

[@sangamstudio3049]

Wow 👌 nice.

[@scarhole]

Nice dogs!!👍

[@chrclmnky]

Yes they are. 🐶🐕‍🦺

[@JorgeLaranLipata]

Watta awesome project Lods😍

[@chrclmnky]

Thanks sir

[@lokeshmounish2865]

Good job

[@chrclmnky]

Thanks

[@juanjoseavilabardales7968]

te quedó bien bacan .

[@louvineapigo3879]

galing ganda ng gawa

[@chrclmnky]

Thanks 🧨🧯😎

[@rkmrajmeena5281]

Sound LOVER 🇮🇳⚡

[@chrclmnky]

hello from the philippines

[@pauloricardocorreafialho1965]

Admiro muito o seu trabalho, tens habilidades e faz um excelente trabalho. Parabéns!

[@chrclmnky]

Thank you Paulo.

[@tinasharma620]

Superb 👌 sir

[@chrclmnky]

Thanks again

[@NSMusicTech0720]

Super Sir 👌👌👌

[@chrclmnky]

Many thanks, Narasimha. 😁😀

[@nandakumaarans]

Hi brother, Good presentation and nice work... 💚

[@chrclmnky]

Thank you so much 🙂

[@nandakumaarans]

@@chrclmnky 😎😎

[@maheshdhodi6321]

Nice sir

[@chrclmnky]

Thanks Mahesh

[@jessiebutcon9805]

Sinawa kaau boss oi nindot pa jod pagkahimo👍

[@chrclmnky]

Matsalams sir

[@civenegarevir4215]

Nalingaw ko SA mga doggie cute KAAYO from CDO.

[@cortessarge5399]

wow.nindota ana sir oi.if dool.pata diri sa cebu nindota kaha sa akong box subwoofer kay mag pahimo jud ko nimo hehe tnx for sharing with us

[@civenegarevir4215]

I love to watch those cute charcoal doggies.

[@chrclmnky]

Yes they're cute. ☺️🐶

[@74midwestbass74]

Nice

[@chrclmnky]

Thanks brother

[@marcossoto9639]

What program do you use to design the boxes or to figure out dimensions?

[@chrclmnky]

Bass Box 6 Pro as usual

[@maxmustermann19203]

very professional work it looks like it is store bought tska ung amplifier po ng sub kinuha nyo lang po sa ibang system o out of the factory ganyan na po?

[@chrclmnky]

Thanks. Amp was purchased from Parts Express few years ago by the customer.

[@fernandomagnaye2556]

Good day sir...can you send me the description of your subwoofer amplfier board...

[@AshishKumar-sl2rd]

Sir can you share me the box size of 10 inch dual magnet suboofer 300 watt rms aeroport enclosure

[@alphaomega8373]

Pretty girl she make me think of an apple :D
Oh and perfect work as always!

[@chrclmnky]

👱‍♀️

[@sibusisojele8805]

Thanks for the video. Is there a difference between a home theater sub and the car subwoofer?

[@chrclmnky]

Box design and appearance.

[@brokeyhub4482]

hellow friend....
It's nice 👍💪

[@chrclmnky]

Thank you! Cheers!

[@Apocalypse_30]

Which sounds better for home the JBL powered subwoofer that you made or this subwoofer?

[@chrclmnky]

Same

[@Apocalypse_30]

@@chrclmnky and what cabinet size you used in JBL speaker. Is it according to JBL manual of custom

[@chrclmnky]

@@Apocalypse_30 i did my own computation.

[@Apocalypse_30]

@@chrclmnky ohh✌🏻👍🏻

[@danielcortez5092]

CM boss, you mentioned Parts Express. They ship to our lovely RP? For example, loudspeakers, amps, your little measuring box (model# ?). Thx. 🙏🏾

[@chrclmnky]

I think they ship stuff to all over the world.

[@danielcortez5092]

@@chrclmnky I am waiting for reply from them. Maybe you got your little loudspeaker measurement from Dayton? Hang in there!

[@chrclmnky]

@@danielcortez5092 DATS v3, yes purchased from Parts-Express.

[@PBasschannel]

it seems to be it is tuned pretty low (big box + long port)...I have a 6.5 inch tuned to 22 Hz (videos on my channel)

[@chrclmnky]

Yeah that's what home theater subwoofers must be.

[@varaniyaketan245]

Sir uska bord kahase kharide ham kuch karva do

[@Archy332]

Просто Идеально!

[@chrclmnky]

Many thanks! 😃😋🤩

[@mostafaalicom]

Link to purchase the products used in the video

[@nellight5397]

Lupit neto boss! Yung design pang branded sub na. Gumagawa ka ba ng enclosure lang boss?

[@chrclmnky]

Thanks po sir. Yes sir but not for the meantime. Too busy on local installs po.

[@randylocus6532]

A work of art indeed. Sa Raon po kayo namimili ng parts like the amplifier and speaker? If yes alin po na store?

[@chrclmnky]

Thanks. Customer bought everything from Parts Express.

[@bypass2998]

Só faltou ligar pra nois ouvir !! A parte mais importante deixou passar

[@chrclmnky]

Watch out for the test video next year.

[@anxiety1209]

Try to paint the orenge port black so when somebody desides to have a peek in the port it would be black like the front port

[@chrclmnky]

They can't see anything there. Home theater subs are usually placed in the dark corners of the house.

[@anxiety1209]

@@chrclmnky well what you said is true but sometimes you gotta put it in the living room where other people do their own thing and they turn on the ligths

[@chrclmnky]

@@anxiety1209 no monkey business in customer's house 😆

[@Techdiscussed]

What was the total cost?
And when do you use stuffing in a box?

[@chrclmnky]

Hello Norman, the sub and amp were sent by the customer and they were purchased from Parts Express. Material and labor cost on building the box was about $250 and that includes shipping to the customer here in the Philippines.

[@Stan_the_Belgian]

That is very cheap!

[@noithugian494]

What is each stage of creating that speaker box?

[@chrclmnky]

Stage 1 - Build, Stage 2 - Showcase

[@noithugian494]

@@chrclmnky What I mean about the painting process.

[@aleksondiy]

well done sir, pwede mkipag sabayan sa branded

[@chrclmnky]

Many thanks po sir. 😎😅

[@RahulKashyap-ug2ko]

But isme powersupply koun si lge gi sir

[@kashifSiddiqui1122]

Hindi nhi janta woh

[@noobsgames3899]

which is the paint

[@dmahmedhunterali840]

How you can make subwoofer box Very clean

[@chrclmnky]

Thanks

[@dmahmedhunterali840]

@@chrclmnky 🥰

[@francisjhan7518]

Wow ganda nman boss saan ka bumibili ng Amplifier Board?

[@chrclmnky]

Sa customer po yung mga parts.

[@themanwithIBS]

Nice
How did you make the flares?

[@chrclmnky]

Watch this video czcams.com/video/nJRR1O5zvKg/video.html at about 1 min 52 seconds to see how i did the flares

[@themanwithIBS]

@@chrclmnky thanks

[@neverseenbefore9375]

Sir please tell me how much rms is PA 80d amplifier? 😭😭

[@chrclmnky]

No idea

[@pradipkumarkar5106]

We expect a little sound demo at last sir.

[@chrclmnky]

Next week

[@jayweb702]

I have 2 of the 8 ohm versions of this driver still in the box.

[@chrclmnky]

cool

[@jayweb702]

I really like them actually, just need to put them in something lol.@@chrclmnky

[@91945punx]

Hi Friend, why the panel in the center of the box (with the circle and rectangle cut out of it)? Just to hold the tube?

[@chrclmnky]

Yes, just to hold the tube.

[@ahalyalechu3131]

Bro i wond infinity 1270 sub woofer box mesharmend plese help

[@chrclmnky]

Ok.

[@agusramdani6141]

I want to have it...

[@nandakumaarans]

Brother Just small request to you, To make video about 31HZ frequency tuned subwoofer box for Sony Xplod subwoofer speaker

[@IDontExist14]

I'm from India and make custom speakers for people, I'll help u out for free u can email me

[@Choppari_Srinivas]

How to buy

[@sravi2003]

hight…...........???
Width.............???
Deep..............???
Port ...............???
Plz send me size i have Kenwood 3010 subwoofer plz bro give me correct measurements box plz help me

[@wishtone885]

Anggaling nang gawa boss saan ka po sa pinas balak ko gumawa ng subwoofer na 100watts lang po

[@chrclmnky]

Thanks. 👍😎

[@kadiskarti7172]

Parinig naman po ng tunog nyan sir salamat ✌️😊

[@JohnBoxWagen]

Gusto ko magpagawa😍

[@chrclmnky]

Pwede.

[@JohnBoxWagen]

@@chrclmnky pm ako sa FB sir

[@sainathdumbre6631]

Bhai iska sound test video banao

[@carlotheatheist]

kaya din ng amplifier na yan ang konzert kw3000m?

[@chrclmnky]

This is a powered subwoofer. What are you talking about?

[@destroyred5691]

Sir magkano po ang ganyan design? Kasama na lahat peyesa salamat po

[@soundtechlightssounds4082]

Ano sir yung pintura bago mo siya pinamasilyahan?

[@chrclmnky]

Lacquer sanding sealer

[@gabrielesaitta6138]

Hi, i need t/s parameters, thanks man.

[@chrclmnky]

GRS 12SW-4 - www.parts-express.com/GRS-12SW-4-12-Poly-Cone-Subwoofer-4-Ohm-292-484

[@shyamparavai1986]

Subwoofer demo video bro. Uploaded

[@chrclmnky]

Ok coming up soon.

[@wayronk6380]

So nice and so awesome..please for giveaway.

[@chrclmnky]

Sure why not

[@mohammadnaveed5234]

Box measurements tell me plz bro rply me

[@chrclmnky]

Check description

[@sushilpal2243]

Ek hamare liye bhejo bana ke havy bass sound system 🙏🙏🙏

[@gows5765]

Total cost

[@chrclmnky]

just a few $$$

[@TRIPLEAAA2077]

Hey bro can I buy this subwoofer i like it very much please 🙏

[@chrclmnky]

Thanks but sorry already delivered to the customer.

[@sahalrasheed6721]

this amp i need . where getting

[@chrclmnky]

At Parts Express

[@braveheart03tv]

sir pila ning ingon ani na pang 12inches na subwoofer box only?salamat sir gensan area lng ko sir

[@chrclmnky]

ikaw to ni inquire sa page nga naay Autobahn subwoofer?

[@maxblade01]

Sound test please 🙋‍♂️

[@chrclmnky]

yes, very soon

[@fredo-v5357]

I want your fabrications in my room

[@chrclmnky]

Sure. 🙂😎

[@edwardaguilar298]

Y la prueba q paso

[@edlibago98]

Idol magkano aabutin kung magpagawa sau ng ganyang subwoofer?

[@chrclmnky]

Bili nalang po kayo ng mga readily available, mas mapalaki po yung gastos ninyo.

[@concretegaming4154]

I want to buy this how much money can I take

[@chrclmnky]

Just a few