Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th March 2008, 03:18 AM   #1
diyAudio Member
 
Join Date: Feb 2008
Send a message via MSN to cyberspyder
Default Beginning of some DIY speakers

For my wood shop summative, I've decided to make some DIY bookshelf speakers. Normally, MDF would be use, but to cut that during class time would require having respirators and goggles for all 24 guys. So no MDF. BUT I have scrounged up some 3/4" Baltic Birch/Russian Plywood as a substitute, which will get here on Monday. I plan to duplicate a set of Zaph's Bargain Mini's, although with a few tweaks of my own.

1) Recess the baffle into the 4 sides
2) Do a 3/4" roundover on the front of the sides
3) Have a recessed back

Preliminary side sketch:

Click the image to open in full size.

Front drawing (from Zaph's page):

Click the image to open in full size.

Baffle detail (also from Zaph's page):

Click the image to open in full size.

Dimensions are 9 1/4" deep, 10" tall, and 6 1/4" wide

Crossover Components:
-2x Bennic wirewound 4ohm resistors
-2x Bennic wirewound 5ohm resistors
-2x 10uF Solen/SCR/Bennic/Clarity Caps Poly capacitors
-2x 2.7uF Solen/SCR/Bennic/Clarity Caps Poly capacitors
-2x 3.3uF Solen/SCR/Bennic/Clarity Caps Poly capacitors
-2x 1.5mH Solen/other brand 18-20ga inductors
-2x 0.25mH (or close to) Solen/other brand 18-20ga inductors
-2x 0.1mH Solen/other brand 18-20ga inductors
-Speaker wire as ICs between the Xover & woofers/tweeters/binding posts
-63/37 0.20-0.32" dia. solder

Vendors: Solen, Madisound, PartsExpress, any other reliable DIY place

Cabinet Parts:
-5' x 5' 3/4" Baltic Birch/Russian Plywood (this is the size it comes in, you only need half of that for a pair, with lots to spare)
-1" dia. x 4" Port tube (I couldn't find any 1" dia. PVC tubing at Home Depot or Rona, so I had to buy special port tubes)
-2x MCM 4'' Shielded Aluminum Cone Woofer (Part #: 55-1853)
***Remember to get the source code on the flyer (here), as it'll get you a discount (only if the woofer is on sale)***
-2x Aurasound NT1-204-8D 3/4" Titanium Dome Tweeter
***DO NOT TOUCH THE DOME***
It is out of stock with a lead time of at least 4 weeks, a substitute (same size & mounting method), BUT IT IS NOT RECOMMENDED, is below
-2x Dayton ND20FB-4 Rear-Mount 3/4" Neodymium Dome Tweeter
-1/2" Sonic Barrier Dampening
-1 1/4" Sonic Barrier Dampening
OR
-1/2" Chopped foam carpet padding doubled (or tripled) up
***To judge whether chopped foam is good or not, hold it up to the light. There shouldn't be many pinpricks of light shining through. This type of material is pretty much the only cost-effective damping material for speakers. It's really not that bad.***
-5/16" OR 1/4", 1 1/2" long socket cap screws (black)
-5/16" OR 1/4" Tee nuts
-4x Binding posts
-Various sizes of heatshrink

LOG

March 10, 2008
-Ordered parts

March 15, 2008
-Some parts arrived :rock::

Click the image to open in full size.

Click the image to open in full size.

March 17, 2008
-My plywood arrived, except it was the wrong thickness...

March 18, 2008
-Some crappy pics of my workspace:

Click the image to open in full size.

Click the image to open in full size.

Brendan
  Reply With Quote
Old 28th March 2008, 03:19 AM   #2
diyAudio Member
 
Join Date: Feb 2008
Send a message via MSN to cyberspyder
March 19, 2008
-PE order arrived, along with my wood!

Click the image to open in full size.
Hmmm, whats in the PE box?...

Click the image to open in full size.
Some books and...

Click the image to open in full size.
MY TWEETERS...

Click the image to open in full size.
Close-up of the protective cap & tweeter

Click the image to open in full size.
Along with my 18mm (sigh...they don't make it exactly 3/4") Baltic Birch

Click the image to open in full size.
Dramatic angle shot showing all 13 plies

Click the image to open in full size.

March 26, 2008
-My Mini-RCA IC parts arrived (Canare Star-Quad, Switchcraft connectors)

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Brendan
  Reply With Quote
Old 28th March 2008, 03:21 AM   #3
diyAudio Member
 
Join Date: Feb 2008
Send a message via MSN to cyberspyder
March 27, 2008
-IC done (Canare StarQuad, Switchcraft connectors), Mini-RCA:

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Brendan
  Reply With Quote
Old 28th March 2008, 08:35 PM   #4
diyAudio Member
 
Join Date: Feb 2008
Send a message via MSN to cyberspyder
March 28, 2008
-My woofers arrived and I began cutting the wood to width:

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Brendan
  Reply With Quote
Old 28th March 2008, 08:59 PM   #5
badman is offline badman  United States
diyAudio Member
 
badman's Avatar
 
Join Date: Sep 2003
Location: Sunny Tustin, SoCal
Looks good so far

But that I had a proper woodshop! I'm working with battery powered (augh) Ryobi at the moment.
__________________
I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!
  Reply With Quote
Old 29th March 2008, 04:17 AM   #6
diyAudio Member
 
Join Date: Feb 2008
Send a message via MSN to cyberspyder
Ouch...
  Reply With Quote
Old 29th March 2008, 05:53 AM   #7
ttan98 is online now ttan98  Australia
diyAudio Member
 
Join Date: Apr 2006
Location: Melb
Default Wood working skills

Looks like you are pretty handy with the woodwork and will produce an outstanding cabinet. I can't

If I were you I will spend more money on buying better drivers that way you will produce a pair of outstanding speakers better than any commercial pair at certain price point specified by the price of the drivers the company uses, ie the better the drivers the better the sound quality.

There are so many designs to pick(so very high quality ones as well) from on the net, just take your pick.

cheers, happy building.
  Reply With Quote
Old 30th March 2008, 04:32 AM   #8
diyAudio Member
 
Join Date: Feb 2008
Send a message via MSN to cyberspyder
The last of my parts arrived, some perfect lay inductors and wirewound resistors from Solen, and I did all the soldering to the speakers, which will make it easier in the long run when it comes time to assemble it.

Click the image to open in full size.
OOOH A BOX! What's inside it????

Click the image to open in full size.
Parts

Click the image to open in full size.
More parts...

Click the image to open in full size.
More parts....

Click the image to open in full size.

Click the image to open in full size.
Speaker and tweeter tabs are a b!tch to solder and thread stranded wire through...I HATE THEM ALL.

Some pics of my home workshop (ie, the dining room table and kitchen counter):

Click the image to open in full size.

Click the image to open in full size.

Brendan

BTW, someone hinted to me that I should be careful when soldering tweeters, something to do with the voice coils. Are they easily damaged?
  Reply With Quote
Old 30th March 2008, 05:07 AM   #9
Account disabled at member's request
 
MJL21193's Avatar
 
Join Date: Mar 2007
Just like Christmas morning! I love getting new things, especially when it's delivered to the door.

The order from PE, don't they ship UPS? Get dinged with the "customs brokerage fee"?

Nice project.
  Reply With Quote
Old 30th March 2008, 05:20 AM   #10
TheMG is offline TheMG  Canada
diyAudio Member
 
Join Date: Jan 2008
You don't normally solder to speaker connector tabs (well, I never do, and most speakers I've looked at don't either).

They are made to accept Faston connectors, you know, these guys:

Click the image to open in full size.

Of course, they are also available in the gold plated variety.

What's this about respirators to cut MDF? Never have I seen anyone wear a respirator when working with MDF. I didn't either...
  Reply With Quote

Reply


Hide this!Advertise here!
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
beginning of a car amp rwaudio Car Audio 8 27th March 2007 10:10 AM
Beginning my aleph 30 bobsinclar Pass Labs 85 4th November 2006 10:01 AM
beginning dome406 Solid State 0 2nd November 2004 05:12 PM
In the beginning ..... gpsmithii Pass Labs 15 24th November 2003 04:34 PM
beginning with class a Opie Pass Labs 3 10th May 2002 07:39 PM


New To Site? Need Help?

All times are GMT. The time now is 11:42 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2