DIY Subwoofer Risers

[Big Daddy]

Originally Posted by crazyBLUE

Thats what they say Now Big Daddy is the KING OF CRAZY !!

As soon as my wife finds out about my little secret, I may be a dead crazy.

[crazyBLUE]

Originally Posted by Big Daddy

As soon as my wife finds out about my little secret, I may be a dead crazy.

How comfy is the couch in the HT I am sure she will take it well , A nice spendy gift would probably help .

[Big Daddy]

Originally Posted by crazyBLUE

How comfy is the couch in the HT I am sure she will take it well , A nice spendy gift would probably help .

I am working on a gift. However, God is on my side. Currently, the driver is in a bad box. The other night she told me that she heard distortion from the subwoofer. Immediately, I jumped in and said that the cabinet is faulty and I have plans to build a better and larger cabinet.

Somebody up there is on my side and doesn't want me dead.

[Aerodude73]

Originally Posted by Big Daddy

I am working on a gift. However, God is on my side. Currently, the driver is in a bad box. The other night she told me that she heard distortion from the subwoofer. Immediately, I jumped in and said that the cabinet is faulty and I have plans to build a better and larger cabinet. - Somebody up there is on my side and doesn't want me dead.

Lol - Even BD has the Mrs. "tuned in" to faulty audio!

[erict]

Originally Posted by Big Daddy

I am working on a gift. However, God is on my side. Currently, the driver is in a bad box. The other night she told me that she heard distortion from the subwoofer. Immediately, I jumped in and said that the cabinet is faulty and I have plans to build a better and larger cabinet.

Somebody up there is on my side and doesn't want me dead.

How do you sleep at night

[crazyBLUE]

Originally Posted by Big Daddy

I am working on a gift. However, God is on my side. Currently, the driver is in a bad box. The other night she told me that she heard distortion from the subwoofer. Immediately, I jumped in and said that the cabinet is faulty and I have plans to build a better and larger cabinet.

Somebody up there is on my side and doesn't want me dead.

& down here too Just make sure when they deliver it she is not home ! Or you might want to run &

[Big Daddy]

Originally Posted by crazyBLUE

& down here too Just make sure when they deliver it she is not home ! Or you might want to run &

I am building one of these just in case. I need to sleep somewhere.

I don't think she will allow me to have a more luxurious dog house.

[Icecoldblue]

Wonder if that thing has a dedicated HT room in the basement

[crazyBLUE]

Originally Posted by Big Daddy

I am building one of these just in case. I need to sleep somewhere.

I don't think she will allow me to have a more luxurious dog house.

Maybe she will go for one that is at least Patriotic

[Big Daddy]

Originally Posted by crazyBLUE

Maybe she will go for one that is at least Patriotic

Unfortunately, it is not 4th of July.

[Icecoldblue]

Could just use your HUGE subwoofer box as a "Doghouse"

[Big Daddy]

On a more serious note, I am actually building a riser for this subwoofer. It is more a dolly than a riser. I have already ordered 4 casters with brakes. The diameter of the wheels are 5". I need to go to Home Depot and buy some wood. I believe a very strong 5 layered plywood will work better than MDF wood. I will put carpet on top and lots of foam underneath it. The advantage of the dolly is that I won't have to carry the heavy monster around and it should raise the subwoofer around 6".

[crazyBLUE]

Originally Posted by Big Daddy

On a more serious note, I am actually building a riser for this subwoofer. It is more a dolly than a riser. I have already ordered 4 casters with brakes. The diameter of the wheels are 5". I need to go to Home Depot and buy some wood. I believe a very strong 5 layered plywood will work better than MDF wood. I will put carpet on top and lots of foam underneath it. The advantage of the dolly is that I won't have to carry the heavy monster around and it should raise the subwoofer around 6".

I totally agree on the thick plywood , Much stronger & will hold up much better to the load & weight ! Best place for the casters is directly under the subs legs but I know you know that BD & I hope they have good locks on them or that thing will be rolling around all over

[Icecoldblue]

Let us know how that turns out BD. This will give me some ideas on what to do when I have enough funds to do what I want.

[Big Daddy]

Originally Posted by Icecoldblue

Let us know how that turns out BD. This will give me some ideas on what to do when I have enough funds to do what I want.

The subwoofer box will be delivered in 3-4 weeks. I will wait until it is here before I completely commit to a riser.

These are the casters I ordered. It is the cheapest price I have ever found for 5" casters. Normally, they are around $20 each. The weight capacity of each caster is 150 lbs. With 4 of them, it should be more than enough to support the subwoofer.

https://www.sescasters.com/scripts/i...=85&keywords=&

I ordered the middle casters. They are swivel kind with brakes and $4.90 each.

[crazyBLUE]

Originally Posted by Big Daddy

The subwoofer box will be delivered in 3-4 weeks. I will wait until it is here before I completely commit to a riser.

These are the casters I ordered. It is the cheapest price I have ever found for 5" casters. Normally, they are around $20 each. The weight capacity of each caster is 150 lbs. With 4 of them, it should be more than enough to support the subwoofer.

https://www.sescasters.com/scripts/i...=85&keywords=&

I ordered the middle casters. They are swivel kind with brakes and $4.90 each.

so is the idea for plcement on #5 in the middle of the room with the driver pointed at the sweet spot ?

[Big Daddy]

Originally Posted by crazyBLUE

so is the idea for plcement on #5 in the middle of the room with the driver pointed at the sweet spot ?

I am not sure I get this.

[crazyBLUE]

Originally Posted by Big Daddy

I am not sure I get this.

are you putting the new sub in the the middle of the room for the fifth sub , Or are you replacing A sub & only having 4 !

[Icecoldblue]

I think he's asking where you are going to put it in the HT room.

Edit: beat by a few seconds :P

[Big Daddy]

Originally Posted by crazyBLUE

are you putting the new sub in the the middle of the room for the fifth sub , Or are you replacing A sub & only having 4 !

No, there will still be 4 subwoofers and they will be placed in the middle of the 4 walls. I will take the Titanic driver out of the current cabinet and put it in the new box. The older cabinet is not a bad one. It is smaller and tuned around 35Hz. It is more appropriate for a car subwoofer than a home theater sub.

In car audio, the low frequency rarely goes below 30Hz. Therefore, subwoofer boxes are tuned 30Hz-40Hz. Since human hearing is more sensitive to upper bass frequencies and car audio fanatics are bass freaks, that works perfectly for them. You can hear the bass sound from 10 blocks away.

In home theater applications, the low frequency of some recennt movies go down to 20Hz or below. When a driver is put in a box that is tuned around 35Hz, a significant portion of the sound will be below this tuning. The driver will receive no support from the back waves in the box under the tuned frequency and will unload and can extend beyond its capability and fail. That is why HT subwoofer boxes are tuned in the low 20's or below. One of the advantages of polyfill is that it slightly lowers the tuning frequency of the box. Not only will the subwoofer sound better and tighter, the driver will also receive more support and last longer.

To make a box tuned lower, you need to make it larger and make the length of the port longer.

If you have a subwoofer box that is tuned too high, you should add a subsonic filter to it to block very low frequency waves.

I paid $100 for this box, including shipping. It is a 15" box and can be used by anyone who needs it. I am willing to give it away. Unfortunately, shipping will probably cost around $30 or more.

That was your lesson for today. There will be a quiz tomorrow.