Jump to content


Photo

Boomboxery Boombox!?


  • Please log in to reply
44 replies to this topic

#1 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 02 December 2016 - 04:46 PM

Hi Guys,

With all the recent hype around the awesome Bumpboxx Freestyle, my enthusiasm for starting another build is building!

This time around, I thought it would be super cool if we, as a community could design and build our own, unique 'Boomboxery' spec box. :-)

Whilst the target audience for the Bumpboxx is outdoor performers and people wanting a 'loud as hell' box, I think there is a gap in the market for a box that is one size down and has an intense focus on sound quality.

Think of this box as something a roadie would build for his/her own use - the same heavy duty plywood construction used in concert speaker cabinets!!

The C100F size is the sweet spot IMHO. This size allows the use of 10 inch drivers for solid bass and also allows for easier transportation.

Ira''s awesome RC550 stereo build confirms the use of 10 inch drivers in a C100F sized cabinet:

Now, this new box won't quite compete with the Bumpboxx for shear loudness. Don't worry, it will crank HARD but the sweetness of the sound will be maxed out!!!

HiFi spec speakers traditionally don't offer PA style sensitivity levels. What they DO offer is vastly superior sound quality which is very important for indoor use. I estimate this new Boomboxery box will have a 70/30 indoor/outdoor usage which is about my usage pattern for my DIY boxes.

These are the basic specs I think are required for this new box:

Conion C100F size cabinet
50 watts RMS per channel.
24 volt D class Tri Path Stereo amplifier.
Bass & treble controls
10 inch drivers (95dB+)!!!!!!!! :-)
Silk dome tweeters (95dB+)
2 way passive crossovers (Hi fi spec)
Monster style cabling
Plywood reinforced cabinet for lightweight and durability against the elements
Bass reflex cabinets - tuned for 40 htz
Bluetooth 4.0 stereo receiver
Two inputs (RCA or 3.5mm jack)
Twin SLA batteries (24 volt) or Lithium Ion pack (if the budget allows)
Vinyl wrap covering is optional
LED light bar is optional (proper spectrum analyser displaying input level - not output level)

Collectively, I know we can design the ultimate Bluetooth speaker - shiat, we all know what works and what doesn't - sound quality and build quality will be off the charts!!

With so many people on this site giving input, I'm sure this box will be the king of boxes!!!!!

Anyone interested??? :-)

#2 trippy1313

trippy1313
  • Members
  • 1,682 posts
  • LocationSeattle-Tacoma, WA

Posted 02 December 2016 - 05:12 PM

Norm (SuperDuper) started a thread about an idea very similar to this.

#3 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 02 December 2016 - 05:14 PM

Norm (SuperDuper) started a thread about an idea very similar to this.

Yes, I remember Norms thread - he was talking about a custom amp etc for his cool design.

I'm thinking the use of off the shelf components will allow for a quicker project completion - there are literally thousands of amps, crossovers, battery charging circuits etc out there ready to go.

#4 Reli

Reli
  • Boomus Fidelis
  • 4,448 posts
  • LocationUSA

Posted 02 December 2016 - 05:16 PM

Aren't class A amps better for ultimate sound quality?



#5 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 02 December 2016 - 05:22 PM

Aren't class A amps better for ultimate sound quality?

Class A won't work for portable applications - they make AB amps look efficient. Class A amps use maximum power regardless of the volume level.

#6 redbenjoe

redbenjoe

    I Am Legend

  • Eternal Order of Boom
  • 17,884 posts
  • Locationflorida

Posted 02 December 2016 - 05:23 PM

we can fit TEN inch woofs in a c100f size box --

really - already did in in my twin jvc550 design



#7 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 02 December 2016 - 05:24 PM

we can fit TEN inch woofs in a c100f size box --
really - already did in in my twin jvc550 design

Now you're talking!!! 10 inch drivers would be cool!!!

See?? Valuable input from people in the know - this thing will be awesome!! :-)

#8 redbenjoe

redbenjoe

    I Am Legend

  • Eternal Order of Boom
  • 17,884 posts
  • Locationflorida

Posted 02 December 2016 - 05:26 PM

like this 

Attached Files



#9 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 02 December 2016 - 05:32 PM

like this

Great box Ira - always loved that build!!! If we could build something that looks that cool, I know I'd be a happy camper!! :-)

#10 Reli

Reli
  • Boomus Fidelis
  • 4,448 posts
  • LocationUSA

Posted 02 December 2016 - 05:34 PM

Yeah C100 woofers look too small for the box, IMO.

The skinny trim rings don't help. That's why TC999 and C126 look better IMO.



#11 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 02 December 2016 - 05:37 PM

Driver size specs upgraded from 8 inch to 10 inch!!

Original thread post updated. :-)

#12 Reli

Reli
  • Boomus Fidelis
  • 4,448 posts
  • LocationUSA

Posted 02 December 2016 - 05:50 PM

Hydro-dipping is possible if the wood is varnished.  You could dip it a carbon fiber or a nice brushed metal pattern.  That would add a couple hundred to the price, though.

 

Attached File  IMG_0865.JPG   196.97K   8 downloads

 

Attached File  IMG_1033.png   927.25K   1 downloads



#13 mellymelsr

mellymelsr
  • Members
  • 2,096 posts
  • LocationNorthern Cali

Posted 02 December 2016 - 07:56 PM

If overall sound quality is the ultimate goal wouldn't a 3 way speaker design offer better sound quality. The Telefunken and Sony FH 3 way offer the best sound in portables. If we're gonna do it let's go all the way. Power source for 100 watt rms should be 12 to 15ah for extended use. Those choices should easily garner 8-10 hours of high volume use. Maybe 10" woofers, 5" mids, and 2" silk tweeters with an active crossover. Multi amp unit would be most efficient for optimum sound...but more expensive.

#14 redbenjoe

redbenjoe

    I Am Legend

  • Eternal Order of Boom
  • 17,884 posts
  • Locationflorida

Posted 02 December 2016 - 08:24 PM

the big spender advice is :

if its a once-in-a-lifetime high end build --that will be kept forever -

then the extra $$ for the BEST components will be worthwhile



#15 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 02 December 2016 - 10:01 PM

On most of my past builds, I've steered clear of 3 way setups to minimise the frontal area required to house 3 speakers. I also didn't want to have the hassle of finding or building custom crossovers that were setup specifically to work right with 3 speakers that may not all come from the same vendor.

A two way is a lot easier in comparison - if 3 way is the way people want to go, then a bigger cabinet may be required. Maybe moving the bass port from the front to the rear panel would be one way of fitting more speakers into the frontal area.

Salvaging a set of used 3 way HiFi speakers with factory 3 way crossovers would be one easier method to overcome this issue - unfortunately, this wouldn't be a 'repeatable' way of doing this project.

The selection of speakers and crossovers is one of THE most important aspects of this project.

This the sort of amp I had in mind. 'Sure' brand gear is good quality stuff. It has a handy 4-position adjustable gain:
https://www.ebay.com...tm/321407746198

#16 Superduper

Superduper
  • Boomus Fidelis
  • 6,078 posts
  • LocationSomewhere over the rainbow, USA

Posted 02 December 2016 - 10:22 PM

Salvaging a set of used 3 way HiFi speakers with factory 3 way crossovers would be one easier method to overcome this issue - unfortunately, this wouldn't be a 'repeatable' way of doing this project.

 

Jimmy,

 

I agree with what you are saying as well as the "problem" of selecting products that would be "repeatable" and also the reason why I advocated for selecting modules that everyone can buy, and using off the shelf products.  Also, the too many chefs in the kitchen scenario where everyone has a different set of suggestions and or wants or needs.  It's not that getting input is not valuable.  It's just that I've discovered that finding consensus is virtually impossible so really, you just need to take charge, do your product, publish the specs and parts used, and show people what can be done.  Then everyone can follow or modify to their hearts content.  Heck we modify M70's and M90's.  The temptation to customize a custom box a little further would simply be too much to resist.  If you read my thread again, you'll see that there are a lot of similarities between what you are saying here, and also the suggestions....  it should be small, it should be big, it should be 2-way or 3-way or 4-amps with subs.  It should have touch screen controls, it should be wood, or not.  

 

Anyway, I know that I haven't updated my own thread in what seems like forever, but I've been slowly accumulating parts.  I finally got my transformers here.  Much of the parts come from China so there is a delay each time I buy more or if they didn't work out.  As well, gathering the parts is slow because it's been a difficult year for me with lots of medical and other unexpected expenses causing us to pinch pennies so I only buy parts when I have a bit of play money which is few and far between nowadays.  Anyhow aside from the transformer, I also got a few switching regulators to supply power to the non-amp modules but now thinking that maybe I might want to go with linear regulators instead.  Anyhow, I probably should stop and just piece them all together and see what happens.



#17 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 02 December 2016 - 10:25 PM

For example, maybe a set of these Jamo 3 ways speakers would work!? - 10 inch drivers, 4 inch mids and 1.5 inch tweeters:

#18 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 02 December 2016 - 10:39 PM

Jimmy,

I agree with what you are saying as well as the "problem" of selecting products that would be "repeatable" and also the reason why I advocated for selecting modules that everyone can buy, and using off the shelf products. Also, the too many chefs in the kitchen scenario where everyone has a different set of suggestions and or wants or needs. It's not that getting input is not valuable. It's just that I've discovered that finding consensus is virtually impossible so really, you just need to take charge, do your product, publish the specs and parts used, and show people what can be done. Then everyone can follow or modify to their hearts content. Heck we modify M70's and M90's. The temptation to customize a custom box a little further would simply be too much to resist. If you read my thread again, you'll see that there are a lot of similarities between what you are saying here, and also the suggestions.... it should be small, it should be big, it should be 2-way or 3-way or 4-amps with subs. It should have touch screen controls, it should be wood, or not.

Anyway, I know that I haven't updated my own thread in what seems like forever, but I've been slowly accumulating parts. I finally got my transformers here. Much of the parts come from China so there is a delay each time I buy more or if they didn't work out. As well, gathering the parts is slow because it's been a difficult year for me with lots of medical and other unexpected expenses causing us to pinch pennies so I only buy parts when I have a bit of play money which is few and far between nowadays. Anyhow aside from the transformer, I also got a few switching regulators to supply power to the non-amp modules but now thinking that maybe I might want to go with linear regulators instead. Anyhow, I probably should stop and just piece them all together and see what happens.

Hi Norm,

It's great to hear your mega build is still in the works. I'm really looking forward to seeing what you come up with. This new thread is really an ideas fest. I know there will never be complete consensus on what each and every person wants.

I'm going to build another box anyway. I just thought it would be fun to come up with a box that most people would love to own if they could buy one off the shelf. It might even inspire some members to build their own box. As this isn't a retail box where profit making is the name of the game, we can afford to throw more money at quality components to truly make a box to last a lifetime (well, the life us old farts have left anyway). :-)

#19 Reli

Reli
  • Boomus Fidelis
  • 4,448 posts
  • LocationUSA

Posted 03 December 2016 - 01:35 AM

I think 10" woofers is more of a style thing than a sound improvement.  I would be perfectly happy with 8", and I bet they would be easier to find than 10".  Heck the DJ Tech boombox only has 5" drivers, and they sound great.

 

As for 2-way versus 3-way, maybe coaxial mid/tweets could give you a 3-way while saving space?

 

I would also recommend pushing the mids/tweets out as far as possible for best separation.  It's just a minor detail, but it works.  Separation is important for indoor use.



#20 samovar

samovar
  • Members
  • 99 posts
  • LocationItaly

Posted 03 December 2016 - 05:24 AM

Wonderful project and wonderful thread. A box must be beautiful, not ony loud. I'm sure yours will certainly knock off a lot of heralded units in terms of sound. And it will be quality sound too. So I humbly suggest not to forget the design -- Ira certainly didn't with his stunning creation.

 

I also love the way all members with the right know-how and experience are contributing ideas and suggestions. This thread is already a sticker in my book :-)



#21 hardmen

hardmen
  • Members
  • 1,486 posts
  • LocationItapevi - São Paulo - Brasil

Posted 03 December 2016 - 09:41 PM

Nice idea Jimmy.

Just for info, i'm working on another custom wooden box.

In portuguese, Wood means "Madeira" or, as simply to say, PAU.

I give you, the PAUSONIC.

Attached File  WhatsApp Image 2016-12-02 at 22.10.29.jpeg   75.46K   2 downloads

Cheers.

#22 caution

caution
  • Members
  • 1,229 posts
  • LocationHillsboro, Oregon

Posted 07 December 2016 - 10:01 PM

This new thread is really an ideas fest.

 

Being as I love looking at a box as much as listening to it, most of my time and effort would go into the exterior. My dream box would be one that from a distance could convince any of us that it was a long lost prototype the likes of an 880, RX7000, C-100F, M90, S90, M-X920, etc. that surfaced after being mothballed back in the early '80s because of bad planning, went over budget, and couldn't couldn't get the time to cost-reduce it. Get closer to it and you'll see the labeling is for more modern uses and the tape door opens to access modern controls and so on.

 

It looks clean, factory-manufactured, the design is busy but balanced, and has classic era styling -- any combination of chrome, brushed metal, plexiglass, black grilles, chrome dust caps, plastic case, lots of vents, ridges, angles, detailed labeling. The case would be plastic and would have to be 3D printed or injection molded I guess, I'm not very knowledgeable on what's available in the maker space there nowadays, but something might be possible. I've even seen some 3D models out there of people just playing around drawing replicas of classic boxes, so spending a bit more time getting it to be something buildable might be possible, who knows. Just dreaming big here :-P

 

I can design and manufacture all the trim and labeling, but would have to design a lot of smaller pieces and figure out a way to modify off-the-shelf components to work for what I'm trying to do, but with a little magic here and there, maybe someday.



#23 jimmyjimmy19702010

jimmyjimmy19702010
  • Members
  • 2,995 posts
  • LocationSunny Brisbane, Australia

Posted 08 December 2016 - 01:53 AM

Being as I love looking at a box as much as listening to it, most of my time and effort would go into the exterior. My dream box would be one that from a distance could convince any of us that it was a long lost prototype the likes of an 880, RX7000, C-100F, M90, S90, M-X920, etc. that surfaced after being mothballed back in the early '80s because of bad planning, went over budget, and couldn't couldn't get the time to cost-reduce it. Get closer to it and you'll see the labeling is for more modern uses and the tape door opens to access modern controls and so on.

It looks clean, factory-manufactured, the design is busy but balanced, and has classic era styling -- any combination of chrome, brushed metal, plexiglass, black grilles, chrome dust caps, plastic case, lots of vents, ridges, angles, detailed labeling. The case would be plastic and would have to be 3D printed or injection molded I guess, I'm not very knowledgeable on what's available in the maker space there nowadays, but something might be possible. I've even seen some 3D models out there of people just playing around drawing replicas of classic boxes, so spending a bit more time getting it to be something buildable might be possible, who knows. Just dreaming big here :-P

I can design and manufacture all the trim and labeling, but would have to design a lot of smaller pieces and figure out a way to modify off-the-shelf components to work for what I'm trying to do, but with a little magic here and there, maybe someday.

I think all project builders would like their creations to look just like a vintage box - that would be the ultimate!! Imagine an M90 MK II?!? :-)

I mentioned in a similar thread a while back about building an acoustically correct box that would sit inside an outer plastic case. You really do need to have a solid box to allow high quality sound but there is definately nothing stopping us from having a 'street worthy' outer case to give it that 'authentic look'.

#24 caution

caution
  • Members
  • 1,229 posts
  • LocationHillsboro, Oregon

Posted 08 December 2016 - 02:28 PM

That's a really good idea! Best of both worlds, I like it.



#25 Reli

Reli
  • Boomus Fidelis
  • 4,448 posts
  • LocationUSA

Posted 08 December 2016 - 02:32 PM

Or just do what DJ Tech did.  The front is plastic but the rest is wood.



#26 caution

caution
  • Members
  • 1,229 posts
  • LocationHillsboro, Oregon

Posted 13 December 2016 - 11:44 AM

I like. Makes the build simpler, and they'll be stackable.

A lot would have to be decided on features and layout, and I'll have to teach myself a 3D design tool, but doable.



#27 Barb Bush

Barb Bush
  • Members
  • 44 posts
  • LocationSoCal

Posted 20 April 2017 - 12:22 PM

I know this is an old thread, and I'm sorry for bringing it back up.  You guys are awesome thinking this stuff up!  Did this ever come to fruition? 

 

An old guy like me can only dream of this.



#28 Reli

Reli
  • Boomus Fidelis
  • 4,448 posts
  • LocationUSA

Posted 20 April 2017 - 01:21 PM

I like. Makes the build simpler, and they'll be stackable.

A lot would have to be decided on features and layout, and I'll have to teach myself a 3D design tool, but doable.

 

The other idea is to simply recycle trim pieces from vintage boxes, like Hardmen does.  Grills and knobs especially. 



#29 hardmen

hardmen
  • Members
  • 1,486 posts
  • LocationItapevi - São Paulo - Brasil

Posted 20 April 2017 - 03:00 PM

Just sharing some videos of my DIY Boxes.

Pausonic.


Custom RC1100.


Red and Denim.


Cheers.

#30 Reli

Reli
  • Boomus Fidelis
  • 4,448 posts
  • LocationUSA

Posted 20 April 2017 - 03:29 PM

Love the LED meter on the first one. Is it straight from a Lasonic?