I have seen suitcase boomboxes, ammo can boomboxes, cardboard boomboxes, PVC pipe boomboxes, and Pelican case boomboxes. How about a dinning room table boombox build?
The $30 CraigsList dinning room table:
Strip off the extra pieces:
Trim off the rounded over edges:
The other end:
This is roughly what I am thinking of for the subwoofer layout. The 6" subwoofer facing forwards and the two 7" passive radiators facing backwards:
I believe the lines in the table are groves that they cut into the bottom to keep the table from warping. Since they are on the inside I can fill them in with epoxy for strength if I need to.
The plan is to have the sub in the left half of the box and the electronics in the right half of the box. The actual speakers are some bookshelf speakers I REALLY like. Rather than trying to build my own imperfectly tuned speakers I am going to go with professionally built speakers and just do the sub/electronics box then hang the speakers on the sides so they are removable.
So now I have a rough cut front and rear:
The pieces are 3/4" thick supposedly maple. If it is maple it is a soft maple. I usually work in hard maple. I think it is another wood... Alder? Beech?
They look they are going to make the boombox pretty tall. Some alternate driver and passive layouts:
The board is a piece of Ipe I plan on using to enclose the box. It will pretty much set the depth of the box:
Maybe I will rearrange the drivers a bit:
The $30 CraigsList dinning room table:
Strip off the extra pieces:
Trim off the rounded over edges:
The other end:
This is roughly what I am thinking of for the subwoofer layout. The 6" subwoofer facing forwards and the two 7" passive radiators facing backwards:
I believe the lines in the table are groves that they cut into the bottom to keep the table from warping. Since they are on the inside I can fill them in with epoxy for strength if I need to.
The plan is to have the sub in the left half of the box and the electronics in the right half of the box. The actual speakers are some bookshelf speakers I REALLY like. Rather than trying to build my own imperfectly tuned speakers I am going to go with professionally built speakers and just do the sub/electronics box then hang the speakers on the sides so they are removable.
So now I have a rough cut front and rear:
The pieces are 3/4" thick supposedly maple. If it is maple it is a soft maple. I usually work in hard maple. I think it is another wood... Alder? Beech?
They look they are going to make the boombox pretty tall. Some alternate driver and passive layouts:
The board is a piece of Ipe I plan on using to enclose the box. It will pretty much set the depth of the box:
Maybe I will rearrange the drivers a bit:
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Here are the electronics. I am using a Sure / Womdon JAB5 (Dayton Audio KABD-4100 ) 4 x 100W amp with DSP in a 2 x 100w + 200w (bridged) configuration: https://store.sure-electronics.com/product/756
The power supply is a 36v 8a generic.
The 18650 batteries are expensive somethings that I bought a couple years ago. They are in this generic battery powerbank configured to put out 29vdc: https://www.aliexpress.us/item/3256...st_main.5.4e781802ljhTqc&gatewayAdapt=glo2usa
The sub is a Tang Band W5-1138SMF 5-1/4" Paper Cone Subwoofer Speaker: https://www.parts-express.com/Dayton-Audio-DSA175-PR-6-1-2-Designer-Series-Aluminum-Cone-Passive-Radiator-295-548?quantity=1&custcol1=Dayton Audio DSA175-PR 6-1/2" Designer Series Aluminum Cone Passive Radiator&custcol_ava_item=295-548&custcol_ava_incomeaccount=General&custcol_ava_upccode=848791005053&custcol_ava_pickup=F&custcol_disableshopping=F&undefined=28.99&fragment=purchases#purchases
The passive radiators are Dayton Audio DSA175-PR 6-1/2" Designer Series Aluminum Cone Passive Radiator: https://www.parts-express.com/Dayton-Audio-DSA175-PR-6-1-2-Designer-Series-Aluminum-Cone-Passive-Radiator-295-548?quantity=1&custcol1=Dayton Audio DSA175-PR 6-1/2" Designer Series Aluminum Cone Passive Radiator&custcol_ava_item=295-548&custcol_ava_incomeaccount=General&custcol_ava_upccode=848791005053&custcol_ava_pickup=F&custcol_disableshopping=F&undefined=28.99&fragment=purchases#purchases
The Speakers are made by SLS (Superior Listening Systems). SLS isn't well known in the home audio market but they are well known for their church, stadium, event, etc. systems. I love the detail of the ribbon drivers and they are well balanced with the woofers through the most elaborate passive crossover I have seen.
I made the middle box to test the sub and see how everything would sound together. I am extremely pleased. I thought of using this sub cabinet and building a separate box for the electronics. But I think everything will be much easier to take places with the sub/electronics in one cabinet.
My first amp was a generic TPA3116 that sounded excellent with the SLS speakers but fell very short on power when I added the sub.
In the first picture I am working on the configuration for the power supply. When the 36v supply is on I want the battery supply to shut off automatically hence the 36vdc relay. I would like to also incorporate a DC in receptacle for an external battery that would also shut off the batteries. This might be a future enhancement.
I also have a smaller set of SLS speakers that are designed for high quality background music in office buildings, restraints, etc. They also have a very clear detailed treble and of course don't go down as low. I am pretty happy with them matched with the sub. They are much lighter which will make them much easier to take camping.
This will most likely be a kind of slow build but I will try to keep it updated if there is any interest.
The power supply is a 36v 8a generic.
The 18650 batteries are expensive somethings that I bought a couple years ago. They are in this generic battery powerbank configured to put out 29vdc: https://www.aliexpress.us/item/3256...st_main.5.4e781802ljhTqc&gatewayAdapt=glo2usa
The sub is a Tang Band W5-1138SMF 5-1/4" Paper Cone Subwoofer Speaker: https://www.parts-express.com/Dayton-Audio-DSA175-PR-6-1-2-Designer-Series-Aluminum-Cone-Passive-Radiator-295-548?quantity=1&custcol1=Dayton Audio DSA175-PR 6-1/2" Designer Series Aluminum Cone Passive Radiator&custcol_ava_item=295-548&custcol_ava_incomeaccount=General&custcol_ava_upccode=848791005053&custcol_ava_pickup=F&custcol_disableshopping=F&undefined=28.99&fragment=purchases#purchases
The passive radiators are Dayton Audio DSA175-PR 6-1/2" Designer Series Aluminum Cone Passive Radiator: https://www.parts-express.com/Dayton-Audio-DSA175-PR-6-1-2-Designer-Series-Aluminum-Cone-Passive-Radiator-295-548?quantity=1&custcol1=Dayton Audio DSA175-PR 6-1/2" Designer Series Aluminum Cone Passive Radiator&custcol_ava_item=295-548&custcol_ava_incomeaccount=General&custcol_ava_upccode=848791005053&custcol_ava_pickup=F&custcol_disableshopping=F&undefined=28.99&fragment=purchases#purchases
The Speakers are made by SLS (Superior Listening Systems). SLS isn't well known in the home audio market but they are well known for their church, stadium, event, etc. systems. I love the detail of the ribbon drivers and they are well balanced with the woofers through the most elaborate passive crossover I have seen.
I made the middle box to test the sub and see how everything would sound together. I am extremely pleased. I thought of using this sub cabinet and building a separate box for the electronics. But I think everything will be much easier to take places with the sub/electronics in one cabinet.
My first amp was a generic TPA3116 that sounded excellent with the SLS speakers but fell very short on power when I added the sub.
In the first picture I am working on the configuration for the power supply. When the 36v supply is on I want the battery supply to shut off automatically hence the 36vdc relay. I would like to also incorporate a DC in receptacle for an external battery that would also shut off the batteries. This might be a future enhancement.
I also have a smaller set of SLS speakers that are designed for high quality background music in office buildings, restraints, etc. They also have a very clear detailed treble and of course don't go down as low. I am pretty happy with them matched with the sub. They are much lighter which will make them much easier to take camping.
This will most likely be a kind of slow build but I will try to keep it updated if there is any interest.
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