Project: Build Awesome Mini Speakers - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Lounge For casual talk about things unrelated to General Motors. In other words, off-topic stuff. And anything else that does not fit Section Description.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-26-2011, 02:51 PM   #1
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default Project: Build Awesome Mini Speakers

Alright, so here'* the deal. I want to build a nice sound system in a very small package. Not looking to spend a fortune. I want to build a set of very compact bookshelf speakers with a great frequency response. This will be a gift for my father in law who'* birthday is coming up in a month, who also just finished a difficult and stressful treatment for lung cancer. He'* on his way to recovering now.

For those who don't know, the basement bedroom (which is easily over 500 sq ft) used to be his office, but with the lung cancer, he moved his office to his bedroom. He gave my wife and I the basement bedroom to renovate and live in as they asked us to stay with them for a while to help him with anything he might need since he'* an IT consultant and I'm an IT engineer. Down here he used to have a badass sound system using my two Polk RM40T'* (google them) and a 12" sub. He used to blast it all the time and play his classic rock for the whole house to hear. Well, he can't do that anymore, and I feel bad since warmer weather is coming and we'll probably be here a while longer.

So, given he doesn't have much space up in his bedroom office, I wanted to make him a set of speakers that will blow him away but be small enough to fit on his desk.

Here'* the plan.

Midbass Drivers
The heart of this system, two 4" midbass drivers that would be better classified as full range. Capable of reproducing 60hz-10k hz.

http://www.parts-express.com/pe/psho...number=290-212


This is a larger version of the Aura NS3 3" driver that packs an insane punch for a 3" speaker. People have built boxes and tuned them down to 40hz successfully. Very large excursion for a 4" driver, and good power handling. Best of all, cheap. I will be using 2 of these per cabinet.

Fast forward to 1:42 to see what these can do: http://www.youtube.com/watch?v=LUNsxdyPnyM


Tweeters
Since the midbass drivers aren't exactly full range all the way to 20khz, I opted for a "helper" tweeter to complement them.

http://www.parts-express.com/pe/psho...number=275-030

Don't let the price fool you, these sound quite amazing.



Binding Posts
'nuff said
http://www.parts-express.com/pe/psho...umber=091-1250



Capacitors
2x
http://www.parts-express.com/pe/psho...number=027-408

10x
http://www.parts-express.com/pe/psho...number=027-400


For making my own high pass crossovers for the tweeters. I will add the larger one first, then test while adding one of the smaller ones one at a time in parallel until the tweeter sounds too hot, then back off one. Simple.


Acoustic Foam
http://www.parts-express.com/pe/psho...number=260-516

Hope the thickness won't matter. I was supposed to get 1/2" but accidentally got 1-1/2".


Port will be built using 1" ID PCV at 113mm length.


Boxes will be 6 liters of volume each, which comes out to .21 cubic feet. I'm going to try for thinner, taller cabinets. Undecided on what material to build these out of. I still have a lot of 3/4" MDF remaining from a previous project, but that'* likely going to be too thick.
xtremerevolution is offline   Reply With Quote
Old 02-26-2011, 03:13 PM   #2
Senior Member
Posts like a Northstar
 
RobertISaar's Avatar
 
Join Date: Jul 2010
Location: Camden, MI
Posts: 615
Thanks: 0
Thanked 0 Times in 0 Posts
RobertISaar is on a distinguished road
Default

http://www.taydaelectronics.com/

andrei, you MAY want to check out tayda for a wider array of caps, and likely at a lower price, even though from the looks of it, they're only drops in the bucket already.
RobertISaar is offline   Reply With Quote
Old 02-26-2011, 03:17 PM   #3
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Quote:
Originally Posted by RobertISaar View Post
http://www.taydaelectronics.com/

andrei, you MAY want to check out tayda for a wider array of caps, and likely at a lower price, even though from the looks of it, they're only drops in the bucket already.
Yeah, the cost was pretty low, and I figured I'd order them from the same place as everything else to cut down on shipping cost.
xtremerevolution is offline   Reply With Quote
Old 02-26-2011, 03:23 PM   #4
Senior Member
Posts like a Northstar
 
RobertISaar's Avatar
 
Join Date: Jul 2010
Location: Camden, MI
Posts: 615
Thanks: 0
Thanked 0 Times in 0 Posts
RobertISaar is on a distinguished road
Default

i'll admit, i didn't check the prices of the woofer or the binding posts, but yeah, this looks to be a pretty low buck setup already.

i know i'll be watching for results...
RobertISaar is offline   Reply With Quote
Old 02-26-2011, 03:36 PM   #5
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Quote:
Originally Posted by RobertISaar View Post
i'll admit, i didn't check the prices of the woofer or the binding posts, but yeah, this looks to be a pretty low buck setup already.

i know i'll be watching for results...
I'm playing with WinISD right now and I was previously recommended a 6 liter enclosure with a 1" port at 113mm length, but the frequency response isn't as great in the lower end as I would have hoped with those figures, so I might go up to 8 liters. I love this software.
xtremerevolution is offline   Reply With Quote
Old 02-26-2011, 05:50 PM   #6
Senior Member
True Car Nut
 
raptor660's Avatar
 
Join Date: Mar 2010
Location: Eaton Rapids MI
Posts: 2,964
Thanks: 0
Thanked 0 Times in 0 Posts
raptor660 is on a distinguished road
Default

Looks like youve been shopping at PartsExpress, looks like a sweet build, Dayton makes quality stuff
raptor660 is offline   Reply With Quote
Old 02-27-2011, 06:36 PM   #7
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Bit of a change of plans. After modeling these drivers in WinISD a bit more, I've discovered their potential. I've also been on diyforum and the partsexpress forum reading about these drivers and people are getting insanely good sound out of them. They're tuning their ports to 38hz. Apparently these have a 10mm peak Xmax and at 32hz they only it 8mm. Absolutely incredible amount of bass from 4" midbass drivers. A couple of guys on the forums had to check and double check their subs when testing these out to make sure they were off because of the amount of low end bass they produce.

In any case, the new plan is for slim floorstanding towers. Luckily for me, someone has already done it and I'm basically going to replicate this. I punched in the volume and port tuning numbers into WinISD and they will be nothing short of spectacular.



Furthermore, I'll be building some proper crossovers for these. Crossed at 3.3khz, these are said to have excellent staging and a very flat response.



Images compliments of partsexpress.com forums.
xtremerevolution is offline   Reply With Quote
Old 02-27-2011, 07:10 PM   #8
Senior Member
True Car Nut
 
raptor660's Avatar
 
Join Date: Mar 2010
Location: Eaton Rapids MI
Posts: 2,964
Thanks: 0
Thanked 0 Times in 0 Posts
raptor660 is on a distinguished road
Default

wow very interesting! I wish i could hear them in person!
raptor660 is offline   Reply With Quote
Old 03-01-2011, 04:19 PM   #9
Senior Member
True Car Nut
 
radomirthegreat's Avatar
 
Join Date: Sep 2006
Location: Indianapolis, IN
Posts: 4,606
Thanks: 0
Thanked 0 Times in 0 Posts
radomirthegreat is on a distinguished road
Default

Updates? Also, where can others learn to do such cool things?

Keep the awesomeness coming! Also, make sure that the speakers don't get so huge that they'll no longer fit into the bedroom.
radomirthegreat is offline   Reply With Quote
Old 03-01-2011, 10:52 PM   #10
Senior Member
True Car Nut
Thread Starter
 
xtremerevolution's Avatar
 
Join Date: Jun 2007
Location: New Lenox, IL
Posts: 2,478
Thanks: 0
Thanked 0 Times in 0 Posts
xtremerevolution is on a distinguished road
Default

Quote:
Originally Posted by radomirthegreat View Post
Updates? Also, where can others learn to do such cool things?

Keep the awesomeness coming! Also, make sure that the speakers don't get so huge that they'll no longer fit into the bedroom.
Just got the 2.5" drivers and the Lepai amp in. Apparently there were a lot of quality control issues with the previous versions of this amp, mostly due to an incorrect power adapter. I plugged this amp into one of my Polk Audio Montor 40'* (dual 5.25" drivers) and turned it up. Absolutely amazed at how much power, bass, and clarity comes out of one of these.

I then hooked up these drivers in free air. From a start, I'm they like to over-extend their excursion and start distorting, but part of that is the break in period. These will *require* sealed enclosures. I tested them quickly by placing them on the mouth of a similarly sized cup and pressing them down. Amazing bass response. These will make very nice cubes.

The rest of the crossover parts came in, but I'm still waiting on the new drivers themselves. Also got the 2" ID double flared ports for the floorstanding drivers. Very sexy. Pictures to come.
xtremerevolution is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1963 Pontiac Catalina massive project build thread Marks02bonneville Your Ride: GM Pictures & Videos 377 08-17-2017 02:32 AM
Getting stuff together for a mini build crunkfrunk Performance, Brainstorming & Tuning 10 04-28-2010 12:29 PM
To build up or not to build up. Bonnie99 Performance, Brainstorming & Tuning 4 02-08-2009 03:33 PM
NE Mini Mini meet impending Mortehl General GM Chat 8 05-04-2006 10:08 AM
Mini Meet in New England aka... Eastern Mini Meet BillBoost37 Your Ride: GM Pictures & Videos 7 07-17-2005 01:27 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 11:32 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.