DIY 10 Inch Subwoofer

[sadik]

This is light density foam which is used in furniture. No specifications available. This was purchased locally.

 

[Naveenbnc]

no further updates since last month???
This is not acceptable bro ??? Its like powercut while watching movie climax

 

[sadik]

no further updates since last month???
This is not acceptable bro ??? Its like powercut while watching movie climax

Lol... Yes This Project is on Hold. I will get on the Track as soon as I complete my Amplifier. JH Super 30

 

[sadik]

I will not leave my project uncompleted. So Back to work now. and below is the update almost after 2 Months.

I have changed the Plate Amplifier design, The new module has everything on single pcb right from PS to speaker protection (PCB Supplied by my Friend @Aniket ) It has some smd components and hence compact in size and fits very well in small size. The PCB dimensions are 150 x 100 mm

Below is the earlier PCB & Plate which i had thought to use for this Subwoofer. (Plate size is 300 x 300 mm)

Amplifier Plate (Aluminium 5mm thick ) with Heat sink. Plate dimensions are 300 x 200 mm

This is how it will look after final assembly (outer side which will be on back side of Enclosure)

Inside Assembly (The Extra socket you see attached to transformer was only for testing purpose)

Checking the fitment on Enclosure back side and its a perfect fit.

The Testing of Amplifier is done and it was successful. So its time to get the enclosure finished as soon as possible.

Sadik

 

[Naveenbnc]

I will not leave my project uncompleted. So Back to work now. and below is the update almost after 2 Months.

I have changed the Plate Amplifier design, The new module has everything on single pcb right from PS to speaker protection (PCB Supplied by my Friend @Aniket ) It has some smd components and hence compact in size and fits very well in small size. The PCB dimensions are 150 x 100 mm

Below is the earlier PCB & Plate which i had thought to use for this Subwoofer. (Plate size is 300 x 300 mm)

Amplifier Plate (Aluminium 5mm thick ) with Heat sink. Plate dimensions are 300 x 200 mm

This is how it will look after final assembly (outer side which will be on back side of Enclosure)

Inside Assembly (The Extra socket you see attached to transformer was only for testing purpose)

Checking the fitment on Enclosure back side and its a perfect fit.

The Testing of Amplifier is done and it was successful. So its time to get the enclosure finished as soon as possible.

Sadik

Hey Sadik, you came back with a great improvement bro !!!! And the size is nearly half now !! I'm sure Aniket's magic is also there in this. And the way you assembled it is very nice. Good going Bro

 

[Krishroy2004]

Hi Sadik,
I am interested in SUB plate amp, how much this one cost?

 

[sadik]

A little update, Since the Plate was 5 mm thick, i was unable to mount the nut of volume control, so i have to do some extra slotting work. I think it also will serve as an aesthetic improvement on looks.

Testing Done, and the Sub is doing it's job as desired.

Now ready to work on the looks of the Enclosure and Plate Amplifier.

Sadik

 

[prateekatasniya]

A little update, Since the Plate was 5 mm thick, i was unable to mount the nut of volume control, so i have to do some extra slotting work. I think it also will serve as an aesthetic improvement on looks.

Testing Done, and the Sub is doing it's job as desired.

Now ready to work on the looks of the Enclosure and Plate Amplifier.

Sadik

Waiting for the finished look...
Your finished stuff looks cool..

 

[sunder]

Sadik, you could do blunt (smooth curve) the sharp corners of the fins of heat sink for safety and for good looking also. IMHO.

And I wish your effort & all projects get every success.

Cheers.

 

[Naveenbnc]

A little update, Since the Plate was 5 mm thick, i was unable to mount the nut of volume control, so i have to do some extra slotting work. I think it also will serve as an aesthetic improvement on looks.

Testing Done, and the Sub is doing it's job as desired.

Now ready to work on the looks of the Enclosure and Plate Amplifier.

Sadik

Ooh...you did the slot cut ?!!
Every little rework kills a lot of time. Needs lot of patience !!!

I may sound dumb here, but a small question.... Except the heat sink, can we not replace the metal plate with a wooden sheet??

(In case of any sparks or short-circuit wood may catch fire though ....)

 

[sadik]

Sadik, you could do blunt (smooth curve) the sharp corners of the fins of heat sink for safety and for good looking also. IMHO.

And I wish your effort & all projects get every success.

Cheers.

To give a radius to the sharp edges, it will need a tool which can give radius to the straight cut, the radius tool was not available with the shop owner. & Thanks for your wishes

 

[sadik]

Ooh...you did the slot cut ?!!
Every little rework kills a lot of time. Needs lot of patience !!!

No i didnt did it myself, I can do it but i dont have the machine to do it.

I may sound dumb here, but a small question.... Except the heat sink, can we not replace the metal plate with a wooden sheet??

(In case of any sparks or short-circuit wood may catch fire though ....)

I am also a bit confused to answer your question. In my case I cannot use a wooden sheet, as i need some solid base to mount all the parts like PCB's Cross Over, Transformer and switches.

I will not advise to use wooden sheet instead of plate. & I think many of them will agree with same. Although you can stick a veneer sheet on metal sheet in case you want to give a wood finish.

 

[saikatbiswas82]

Looks very nice. Congratulations!

 

[sadik]

Looks very nice. Congratulations!

Thankyou Bro

 

[drgb]

Amazing work sadik bhai!
Especially the custom plate amp build is diy perfection!
Kudos!

 

[Hari Iyer]

Below are some curves of this Enclosure

Sadik Bhatkar

The FR shows the response is a bit under damped due to increased Q in the low end. Curious to know if you are getting boom or thumping bass at the low end. If yes you can try simulation in Basta and check if you can critically damp the enclosure. Also vent velocity indicate under damped enclosure.
Thanks,

 

[sadik]

The FR shows the response is a bit under damped due to increased Q in the low end. Curious to know if you are getting boom or thumping bass at the low end. If yes you can try simulation in Basta and check if you can critically damp the enclosure. Also vent velocity indicate under damped enclosure.
Thanks,

Thank you Mr Hari for looking on my graphs. I have dampen the Enclosure with medium density Foam. The Low ends are Boom & not like thump. Is this good? A suggession from senior Guru will be of great help for me.

Sadik

 

[sadik]

Today's Update. Getting the Enclosure ready for Painting & Final touch.

PU Putty allied on all Faces of Enclosure. Sanding will be done after drying.

This will be fitted on Vent (On Inside circle cutiut radius will be given after fitment)

Speaker Grill

Sadik

 

[Hari Iyer]

Thank you Mr Hari for looking on my graphs. I have dampen the Enclosure with medium density Foam. The Low ends are Boom & not like thump. Is this good? A suggession from senior Guru will be of great help for me.

Sadik

If you have REW and have an impedance Jig, then you should measure the impedance while adjusting stuffing. Stuff till you manage to get both the impedance peak equal ( one is of woofer and second is of box).. Try some Recron polyfill and adjust stuffing.

 

[sadik]

If you have REW and have an impedance Jig, then you should measure the impedance while adjusting stuffing. Stuff till you manage to get both the impedance peak equal ( one is of woofer and second is of box).. Try some Recron polyfill and adjust stuffing.

I dont have any of the above instrument to measure impedance. Secondly what do you think about a normal cotton, Can we use it for damping?