Design GIGAAMP SubWoofer.

[myanmar]

Thanks for advice.

Where can I buy that woofertester ?
Can I get in singapore ?


Here is my subwoofer.
U can see in photo.

Rumbling sound of that woofer is good.
But need a lot of power.

I think dipole is more efficient than my woofer.
Can dipole woofer get rumbling sound ?

If I used paper

 

[myanmar]

another picture

 

[myanmar]

next one

 

[jwatts]

Order It

You can order it here.

http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=390-802

It takes just a few minuites it will give you about all your subs parameters.

 

[myanmar]

Hello jwatts,

I am very interested that woofertester.

Can that woofertester test accurate ?

I want to order.
But That will be very difficult to order from our country.

Which country can buy easily & cheapest ?

USA or Singapore

And then ship to myanmar.

Pls, advice me.

Thanks.

 

[jwatts]

Comparison Study

Here is a the values of a 10 inch, 12 inch, and a 15 inch subwoofers that I measured with the woofertester compared against the same subwoofers I had measured at a independent sound lab. They are close.

 

[myanmar]

Hello jwatts

Thanks for yuor help.

I will buy that tester.

I think I will wait one or two months to get that tester.

 

[myanmar]

Hello jwatts,

I already order that tester.

I think, I must wait a few weeks.

Continue help me when I use that.

Bye.

 

[myanmar]

Hello Friend,

I got woofer tester today.
So, I will test my spk tonight.

 

[myanmar]

Hello Friend,

How can I calculat Power Handling & other parameters with that woofer tester?

I think woofer tester cannot test all parameter of speaker.
Is it true ?

Where can I learn speaker's parameter ?

Pls, help me.


Thanks.

 

[myanmar]

Hello Friends,

Pls, help me.
how can i use my woofertester?

I already asked woofertester.com.
They advice me buy speaker design cookbook.


Is there any other way?
I don't want to buy book.
Pls, give me web links or documents which explain about SPK parameters.

 

[myanmar]

hello friends,

Now, I tested new woofer which is upgrade from my old woofer.

http://www.diyaudio.com/forums/attachment.php?postid=845270&stamp=1139919766&

I delete AMP section, replaced passive radiator in the AMP section & closed the port.

I like that woofer sound very much.
But there is something wrong.
sometime I heard coil knock sound. ( very seldom not always ).
Is that Resonance ?
How can I tuning that woofer?
I already tunning with weight which is on passive radiator.



I think somebody will help me.
I will post that woofer photo.

Pls, help me.
Sorry for my poor english.

Regards,
Myanmar.

 

[myanmar]

I found the problem.

That will happen when I use UPS power. ( always no electricity in our country ).

So, How can I repair that problem.

Pls, continue help me.

Regards,
Myanmar.

 

[myanmar]

Here is my new sub woofer.

That produce a lot of resonance.
So, I tune with the upper & lower chamber & pipe.

Now, good for me.
I notice that upper chamber size is more important than other.

 

[myanmar]

top view

What is my woofer type ?
6th order ?

 

[myanmar]

under view

How can I post with many attachments ?

I can't post with many attachments.
I can post only one attachment.

Pls, help me.

 

[Nordic]

You are maybe not far off with the bent pipe... I bleieve the Logitech subwoofers (PC speakers) have a spiral or curved port...

 

[myanmar]

Here is my spk specification.

Open air & With Box.


How can I know my woofer is good or bad when I see that graph.

Pls explain me.

Regards.

 

[myanmar]

I tested with woofertester.

 

[myanmar]

That SPK placed in my woofer.
And then test again.