The Boominator - another stab at the ultimate party machine

Is it possible in any way to test or describe how loud / clear a properly built boominator plays?

I know I have some small measurement errors that are not visible or left any air holes, but I would like to know if my boominator plays its full potential.
Not that Im dissatisfied, Im just curious!

Well, a good test would be to try to have a conversation a distance of a few meters. Just try to ;). You should have a hard time doing so ^^.
 
First of all; I worship your audioness, Saturnus, for creating such an awesome speaker and being so responsive and helpful!


I am a total newbie, and after having read a hundred different pages (with joy!) and having seen a ton of different schematics, i just want to make sure, that i've got it right:

7WlO7Yi.jpg


Does this work out, or will i and the nearest happy families be destroyed in the blast from either my short-circuit or the wretched sounds from hellishly bad configured speakers?

I am also a bit dumbfounded on the best way to recharge your batteries - was wondering if there was a nice easy solution with a socket in your Boominator? :)

Thanks in advance, you are great!
 
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Boominator upgrade.......
Inspired by shortropes Tham15 system I thought that I'd put one of my HD15s to good use....... I've wanted a battery system to run inverters for decks, laptop chargers etc for a while now......
So, two 110ah deep cycle batteries, one running a 300w inverter and the other running a bassface db1.2 mono class D subwoofer amp, connected to a HD15.....

Not fully tested yet but I'm a little disappointed already. Great to have a power plant all built into a single integrated unit, I knew it would be heavy but jeez, it is so heavy, it kinda defeats the object of portability..... I may as well cart a generator about.....
I may have to split it into separate units....

Will be using it in anger at the weekend so I'll report back....



BJ

Whoa!...not surprised it's heavy with two Batteries and an Inverter!!
My rig is super heavy with just the one Battery but fine once it's on wheels.
More importantly...what does it sound like????
 
Is it possible in any way to test or describe how loud / clear a properly built boominator plays?

I know I have some small measurement errors that are not visible or left any air holes, but I would like to know if my boominator plays its full potential.
Not that Im dissatisfied, Im just curious!

It so depends on how good the input signal is.
Like they all say when it's right you can't hold a conversation next to it without shouting.
My 3rd Gen iPod touch is not very loud, my iPhone 4s is significantly louder and my Macbook is best.
If you have a Bluetooth receiver or a Headphone Amplifier that makes it even louder!!
 
About a year back I read through most of this thread and decided this was the beast I want to build.

I was wondering if people have a recommended reading list for electronics and audio noobs that could get me up to a stage where I can confidently build this.

Also, is the Wiki an alright source of info specific for this project?

I seem to be having trouble finding a good battery, any good UK suppliers for LiFeSO4's?
 
First of all; I worship your audioness, Saturnus, for creating such an awesome speaker and being so responsive and helpful!

The diagram is *not* appropriate for the drivers listed shown on the drawing.

The use of tweeters requires a proper cross over. The SN2-10MB requires a DSP. The resistor works only for the peizo horn
 
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Yes, it should be stuffed.

Another sort of related question: how to make sure that the phase of the speaker and the tweeter is the same? The tweeter has a "positive" and "negative" lead, but there are no such indications on the SP60 speakers. Or is this just a matter of trying it out, switching it over and deciding what sounds best?
 
Maxamp20 idle current

Hello fellow builders!

A long time reader of the thread here.

I am about to build a halfinator and have recieved the maxamp20. I have just tested it with my home stereo speakers (8 Ohm) and i was pleased by the sound with my android phone, but not with my work phone (iphone).

On to the point: When i measure the current consumption i am a bit disappointed. I measured 100mA from no sound, all the way up to 3/4 volume. I read somewhere that it should be around 55mA. When i disconnected the speaker wires, the idle current is 45mA.

My question is: Is it normal to have the same current consumption no matter how high the volume is up to 3/4 of the volume?

Thanks!
 

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Micro filter...not sure if it's sounding right.

Could you guys cast your eyes over my Micro filter and confirm if it's correct?
The choke is in there but soldered directly to the Tweeter.
I'm not sure if it's all sounding correct.
At the moment the ported reflex Boomcases I've made already are sounding better than it.
 
Me and my friend are planning on building a Boominator. The normal 90cm length is a bit too long to our liking so we are looking to flip the speaker cabinets 90 degrees. Somebody has already done that on this forum, but which (negative) effects does it have on the sound? Otherwise we maybe have to settle on a Halfinator.
 
We prefer something around 50-60cm max. If flipping the speaker compartiments degrades the sound too much we'll build it to spec. Or a (24v) Halfinator.

And another question: how do you calculate the proper resistor for your piezo. We plan on using piezo and we want to buy the proper value resistors instead of going with the general value.
 
Hello fellow builders!

On to the point: When i measure the current consumption i am a bit disappointed. I measured 100mA from no sound, all the way up to 3/4 volume. I read somewhere that it should be around 55mA. When i disconnected the speaker wires, the idle current is 45mA.

My question is: Is it normal to have the same current consumption no matter how high the volume is up to 3/4 of the volume?

My MAX9709 amp modules consume around 20mA with no load connected. (3mA are for the LED)

Thanks!

This might belong to your speaker-internal x-over or too long wires. Have you tried with a single chassis? Is the IC getting warm without signal?

Regards,

doc
 
I'm not sure if it's all sounding correct.
At the moment the ported reflex Boomcases I've made already are sounding better than it

Filter looks OK.

My Micro can't really compare to most speakers' bass and loudness. Other speakers can't compare to the compactness. I guess one has to make compromises to get to such a small form factor.

Note that my Micro isn't fully to spec.
 
Filter looks OK.

My Micro can't really compare to most speakers' bass and loudness. Other speakers can't compare to the compactness. I guess one has to make compromises to get to such a small form factor.

Note that my Micro isn't fully to spec.

Yeah you're right!
I've been using my full size Boominator so much I've got used to it's savage output.
On reflection the Micro is very impressive for it's size.
I played it to my Wife this morning and she was blown away with it.
Also, it sounds way better on the floor than when testing on the bench.
 
...and here it is, my Micro.

Here's a shot of my Micro just finished.

It's Maxamp powered with tweeters.
I managed to squeeze a PSU, charger, 3.2ah SLA and a battery protection module into the electronics compartment.
I've incorporated vent holes for all that behind the Speaker cloth.
I got nearly all the gear from Kistradio en Kratradio Specialist - Home
who are an absolute delight to deal with, many thanks Wesley.

At first I wasn't sure wether I liked it but after a lot of listening it really does punch above it's weight (mine's a rather large 6kg!)
Like the full size Boominator it's deceptively loud.