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back pack boom box help

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Saturnus View Drop Down
Old Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Saturnus Quote  Post ReplyReply Direct Link To This Post Posted: 11 December 2013 at 9:28pm
I suggest you ask on the facebook page for the users impressions. I promise to stay out of the discussion.
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Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Shortrope Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 8:19am
I've a Boominator and it's outstanding!
My mate just finished his Boominator and it's outstanding too!!
My Tinnitus is coming along nicely!!
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tcourtneyvincent View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tcourtneyvincent Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 9:19am
Originally posted by Saturnus Saturnus wrote:

The minirig and the boominator is not really comparable in that sense. The bass response is vastly better, and sounds as deep as if not deeper than the minirig + sub. And let's not go into the fact that it plays much much much louder.

I very much suggest you start with a tested and confirmed good design. And that you start with an inexpensive 12V amp. Because it's better to get it right the first time around, and I am confident that you will be amazed by the result, like everyone else.




OK i think you have swayed me haha. I will go for a half boominator, but, can i just increase the length a bit to give a lower cutt off? I know i cant increase the withe because that will change how the back of the magnet increase the efficiance of eachother but surely increasing the length will just increase the chamber size and mean it drops a bit lower. Oh which brings me onto my second question, do you use a hi pass filter anywhere? i cant see one...
Also since im using only 2 speakers are there 4ohm versions of the drivers you recomend? or are there other 4ohm alternatives to get the most out of the amp?


Edited by tcourtneyvincent - 12 December 2013 at 9:26am
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Old Croc
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Saturnus Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 10:10am
The piezo tweeters in the pack do not require a high pass filter beyond a single 47ohm series resistor on each.

There are no 4 ohm version of HP10W available. But that means you can use cheap as dirt amps that are only good at 8 ohms instead like the below. Note that neither of these should be used with 4 ohm speakers:

For 12V: http://www.ebay.com/itm/MKll-TA2024-Fully-Finished-Tested-PCB-Power-Digital-Amplifier-Board-2x15W-12V-/360626685157?pt=AU_Electronics_Audio_Amplifiers&hash=item53f70684e5 

For 24V: http://www.ebay.com/itm/TK2050-50W-50W-2x50W-Class-T-HIFI-Stereo-Audio-Amplifier-Board-/181232868690?pt=US_Amplifier_Parts_Components&hash=item2a32521d52

If it were just that simple. No, I strongly recommend not changing any measurements of the speaker compartment or the port/handle. If it sounded better going lower with a small change in cabinet volume I would have designed it so. As any other ultra-resonant system, the Boominator works because it's the perfect storm of doing many things wrong in order for the outcome to be right. Changing one parameter makes the whole systems strengths collapse and you're left with something that will not only not play deeper bass but won't sound like it does either. That's the trick here, it sounds like it plays really deep bass, while in fact it doesn't. And that's the whole point. 

Edited by Saturnus - 12 December 2013 at 10:13am
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tcourtneyvincent View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tcourtneyvincent Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 10:15am
Originally posted by Saturnus Saturnus wrote:

The piezo tweeters in the pack do not require a high pass filter beyond a single 47ohm series resistor on each.

There are no 4 ohm version of HP10W available. But that means you can use cheap as dirt amps that are only good at 8 ohms instead like the below. Note that neither of these should be used with 4 ohm speakers:

For 12V: http://www.ebay.com/itm/MKll-TA2024-Fully-Finished-Tested-PCB-Power-Digital-Amplifier-Board-2x15W-12V-/360626685157?pt=AU_Electronics_Audio_Amplifiers&hash=item53f70684e5 

For 24V: http://www.ebay.com/itm/TK2050-50W-50W-2x50W-Class-T-HIFI-Stereo-Audio-Amplifier-Board-/181232868690?pt=US_Amplifier_Parts_Components&hash=item2a32521d52

If it were just that simple. No, I strongly recommend not changing any measurements of the speaker compartment or the port/handle. If it sounded better going lower with a small change in cabinet volume I would have designed it so. As any other ultra-resonant system, the Boominator works because it's the perfect storm of doing many things wrong in order for the outcome to be right. Changing one parameter makes the whole systems strengths collapse and you're left with something that will not only not play deeper bass but won't sound like it does either. That's the trick here, it sounds like it plays really deep bass, while in fact it doesn't. And that's the whole point. 


OK i understand, u mention a Qubinator instead of a halfinator. Do you still stand by this as you havnt mentioned it in this thread yet. Thanks for the help btw :)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Saturnus Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 10:18am
The Qubinator is an alternative if absolute portability is the main concern. It has Boominator-like sound but it is not as good in any area. Less bass, less treble, less detail, not as loud. 

Edited by Saturnus - 12 December 2013 at 10:19am
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tcourtneyvincent View Drop Down
Young Croc
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tcourtneyvincent Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 10:22am
Originally posted by Saturnus Saturnus wrote:

The Qubinator is an alternative if absolute portability is the main concern. It has Boominator-like sound but it is not as good in any area. Less bass, less treble, less detail, not as loud. 


Im sure that is the case when compairing it to the boominator, but what about the halfinator?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote slaz Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 10:26am
Just curious - I know the Boominator is designed for use in "open space" ... but what happens if you DO place it against a wall ? (Lets assume on the pavement/sidewalk against a brick wall)  How does it behave ?


REMEMBER....POLITICIANS AND DIAPERS SHOULD BE CHANGED OFTEN AND FOR THE SAME REASON
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Saturnus Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 10:29am
In effect you can compare a Boominator with a bandpass sub in the way it works. A bandpass sub is also a ultra-resonant system where if you change one of the internal volumes, the ports, or the driver for one with different parameters the whole system collapses and it will not play anything well. And like a bandpass sub there is almost only one specific combination of internal volumes and ports that works for a specific driver. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Saturnus Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 10:30am
Originally posted by tcourtneyvincent tcourtneyvincent wrote:

Originally posted by Saturnus Saturnus wrote:

The Qubinator is an alternative if absolute portability is the main concern. It has Boominator-like sound but it is not as good in any area. Less bass, less treble, less detail, not as loud. 


Im sure that is the case when compairing it to the boominator, but what about the halfinator?

That was compared to a halfinator.



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Saturnus Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 10:33am

Originally posted by slaz slaz wrote:

Just curious - I know the Boominator is designed for use in "open space" ... but what happens if you DO place it against a wall ? (Lets assume on the pavement/sidewalk against a brick wall)  How does it behave ?

As you'd expect, increased bass output. It's only when brought indoors in something less than gym sized building (ie, four walls, a floor and a roof), you'd have a decidedly negative effect.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote tcourtneyvincent Quote  Post ReplyReply Direct Link To This Post Posted: 12 December 2013 at 10:35am
Originally posted by Saturnus Saturnus wrote:

Originally posted by slaz slaz wrote:

Just curious - I know the Boominator is designed for use in "open space" ... but what happens if you DO place it against a wall ? (Lets assume on the pavement/sidewalk against a brick wall)  How does it behave ?

As you'd expect, increased bass output. It's only when brought indoors in something less than gym sized building (ie, four walls, a floor and a roof), you'd have a decidedly negative effect.



Hmm what do you mean by negative effect?
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