Boombox/case build finished!! |
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WesleyK
Registered User Joined: 24 December 2012 Status: Offline Points: 90 |
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I imagine the only negative downside would be the decreased volume of the cabinet.
Which in this case, again, is very neat. That's how i'd like ti see custom builds. Well done! Are you using a 3Ah battery at the moment? Should be plenty for a whole day at moderate volume. |
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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Yeah, I know...it's not ideal but I was caught for space. It all sounds very nice though and I'm thinking that all that air being moved about through the ports will keep it well ventilated!!
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My Tinnitus is coming along nicely!!
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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Just a 2.2ah at the mo. They won't be unplugged that much and I can add another if needed.
Edited by Shortrope - 15 December 2013 at 10:14pm |
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My Tinnitus is coming along nicely!!
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Saturnus
Old Croc Joined: 13 July 2010 Location: Copenhagen Status: Offline Points: 2025 |
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Strong magnets close to output inductors in class D amps generally isn't a good idea, though. And naturally, the constant change in air pressure and humidity will shorten capacitors, especially electrolytic capacitors, lifetime. In this case, I don't think either has particular relevance or noticeable effect. |
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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Well these were a great success!!
The kids were properly delighted with them! We even had a full on Disco yesterday evening with the pair of them playing together off a splitter cable. Me and everyone else were knocked out by the sound volume and quality. It got me thinking though... I'd like to build a separate Sub in another case. These two could be run off it then as satellites with some kind of low pass filter to knock off a bit of the low end on them. Does this sound like a goer???
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My Tinnitus is coming along nicely!!
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lutkeveld
Young Croc Joined: 23 September 2013 Location: The Netherlands Status: Offline Points: 517 |
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Sounds nice. Build a two-way filter in the subwoofer. Low signal goes to the sub, high goes to your boombox.
Edited by lutkeveld - 26 December 2013 at 3:19pm |
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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That's what I was thinkin...might need a little assistance with the filter though!!??
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My Tinnitus is coming along nicely!!
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lutkeveld
Young Croc Joined: 23 September 2013 Location: The Netherlands Status: Offline Points: 517 |
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Can't really help you with that. I can give it a try though, and see if anybody can correct or confirm it. I would do all the filtering on line level. For crossing around 170hz using this calc: http://www.the12volt.com/caraudio/crosscalc.asp#ccc
It isn't precise, but I don't think it will matter much here. You could use dual voice coil sub to get the most out of your dual channel amplifier. The Dayton SD215 would be a nice option IMO.
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Saturnus
Old Croc Joined: 13 July 2010 Location: Copenhagen Status: Offline Points: 2025 |
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If it's on line level, ie. on the signal input side of the amp, then you have to remember that the input impedance of an amp is quite different than the (input) impedance of a speaker (typically by a factor of a couple of 1000). Edited by Saturnus - 29 December 2013 at 12:11am |
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Shortrope
Young Croc Joined: 08 July 2013 Location: Ireland Status: Offline Points: 1232 |
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Interesting lads...thanks!
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My Tinnitus is coming along nicely!!
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iboominate
New Member Joined: 29 September 2013 Location: Costa Rica Status: Offline Points: 9 |
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Hey shortrope i like your boomcase ! and i think its awsome , i want to make my own and repurpose really hq desktop speakers i have , KLIPSH ones but im having some problems getting the wiring right , your project is whats closest to my goal so could i get some help with a diagram? Here is where i stand: Since my desktop speakers were really HQ , ive decided to use the speakers own amp , so basically im turning 2 speakers into one 12v boomcase with bluetooth functionality so my goals are: -Both Bluetooth and Aux inputs(dont know how to have two inputs since only one 3.5 input one the amp ) - Battery powered recheargeable (12v sla) -Currently amp has (Line Input,low gain output for headphones and other output one i dont know ) -the amp powers itself from a huge & heavy square power supply (i want it just to be a normal cable with ps inside the boomcase) with these specs: INput:120V ~ 60hz 450mA Output:+- 18v = 834mA SO: i can solve the bluetooth problem with a module i have by just pluggin in the 3.5 to the amp and leaving it inside the box BUT (how could i also use that as a 3.5 input also ? ) -and power the bluetooth module thru the 12v wiring with a 12 to 5v stepdown but i wouldnt know where to wire it to! - As for power i have no idea how to power the board with a battery and ac mains (and switch between them) -how to dial in the 834Ma output in the Ps You used these are the specs fot the speakers im trying to convert: http://www.klipsch.com/promedia-ultra-2-0-computer-speaker-system/details - http://www.klipsch.com/promedia-ultra-2-0-computer... Thanks all help possible is appreciated |
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Edd Jordan
Young Croc Joined: 10 January 2008 Location: United Kingdom Status: Offline Points: 1364 |
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Awesome Build, super tidy and fantastic looking. like mini mad said you will be the dad of the year.
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I do a sideline in ply wood wheels.
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