2 way crossover design help - Page 12 - diyAudio
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 16th July 2012, 12:33 AM   #111
AllenB is offline AllenB  Australia
diyAudio Member
 
Join Date: Oct 2008
Quote:
Originally Posted by tvrgeek View Post
I would be concerned with the above picture that you will get wind noises by the relative small opening on the box end compared to the mass of air in the port.
The slot port reminds me of those pedestal room fans with the narrow ring slot but no blades. It seems like an opportunity to optimise the flow which was done with an aerofoil at the opening. The small conventional fan in the base of these with its narrow diameter can be quite noisy.
  Reply With Quote
Old 16th July 2012, 03:13 AM   #112
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
I think I'm going to try a few shapes for the "strips" - 1st is going to be flares at front and back, something like: ) (

With the 4 rectangle strips - (2 center openings) strips the bass is stating to sound throaty. So far no wind noise with these thicker strips.
  Reply With Quote
Old 30th September 2012, 02:36 PM   #113
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
Default Looking for a tweeter for this box

We had a little listening get together yesterday. The small dark wood covered boxes (pic in post #1) were holding their own. Lots of solid bass, imaging is very good (which I always thought) but it was good to hear it from somebody else. We tried several pairs of speakers; this was the runner up

So the second part of this post. Looking for a tweeter for this box, it sounds pretty good for a full range, lacking top end crack, e.g. can't hear wood hitting cymbals. The imaging is impressive, just no high end I was thinking about a small tweeter to handle 4,000 >

Vifa XT25SC90-04 1" Dual Ring Radiator Tweeter 264-1014

This is the woofer in the box:

Tang Band W5-1611SAF 5" Full Range Speaker 264-918

btw, getting some really nice lows out of this box, really low.
Attached Images
File Type: jpg Tweeter I.jpg (44.8 KB, 93 views)

Last edited by ODougbo; 30th September 2012 at 02:39 PM.
  Reply With Quote
Old 8th December 2012, 08:11 AM   #114
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
Default Finished Product

Here's a pic of the TV/speakers. I tried to make it easy for the wife to use so using the TV's mini 1/8" R/L out, right into a amplifier, however losing a lot of the high end.

I guess I could bypass the 0.1 with a clip lead and see if there is significant increase in the treble.

Again - Thanks for the help!

[need to make mini stands for the speakers]


Quote:
Originally Posted by system7 View Post
I'd GUESS looking at Thomas Akerlund's circuit there, that the 4 ohm peerless has Le of 0.55mH...

So this looks reasonable to me as a start:

Click the image to open in full size.

The 0.1 ohm resistor is adjustable for tweeter level. The 0.55mH coil will mean there isn't much bafflestep correction, so these are best placed by a wall. Think that agrees with Jerome69's ideas too. Really can't say how bad the woofer peaks are going to sound, or exactly how to tame them. But this circuit is non-critical and has good phase alignment from 2kHz to 10kHz.
Attached Images
File Type: jpg Temp 12.jpg (80.8 KB, 73 views)
  Reply With Quote
Old 9th December 2012, 08:34 AM   #115
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
Default Try Everything!

I spent most of the day on this yesterday -

There was one mistake I found early, the set-top-box was set to "heavy" which is like a "loud" button; turned that off.

I gave up on the digital (HDMI) hook up (for sound), I was going thru the TV's D/A converter for a preamp, it was adding color to the sound.

The better hook up: was Analog - Set-Top-Box to amp (only). The STB has a variable out, so can adjust level from easy chair - but there is no switching.

The tweeter needed a little help, added small caps until the tweeter sounded balanced (I didn't think the middle was a issue) I went from a 3.9uf to 5.9uf (as shown).

The xo circuit works very well, the imaging is very good, with a stereophonic sound.

Attached Images
File Type: jpg Temp14.jpg (28.0 KB, 61 views)

Last edited by ODougbo; 9th December 2012 at 08:37 AM. Reason: :
  Reply With Quote
Old 23rd December 2012, 10:14 AM   #116
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
I hope I get one pair together today.

Attached Images
File Type: jpg DSCN1022.JPG (501.9 KB, 56 views)
  Reply With Quote
Old 23rd December 2012, 11:18 AM   #117
system7 is offline system7  United Kingdom
diyAudio Member
 
system7's Avatar
 
Join Date: Aug 2008
This is all great stuff, ODougbo! I have in mind a similar project with some small 4ohm polycones I have lying about.

I get in terrible trouble for saying this stuff is all quite straightforward, but it's interesting that you have ended up with something not a million miles from the Epos ELS-3 design. Naturally, 2nd order tweeter is better with time-alignment, 3rd order on flat baffles. We don't find tweeter phase reversal and time-alignment too difficult either, eh?

Up the diy-ers for MUSICAL speakers!
Attached Images
File Type: jpg Epos_ELS-3_Loudspeaker.JPG (23.6 KB, 26 views)
File Type: jpg Epos ELS-3 Crossover.JPG (15.8 KB, 25 views)
File Type: jpg Epos_ELS-3_FR.JPG (25.8 KB, 20 views)
File Type: jpg Epos_4ohm_130mm.JPG (17.2 KB, 19 views)
__________________
Well, there it is! Best regards from Steve in Portsmouth, UK.

Last edited by system7; 23rd December 2012 at 11:41 AM.
  Reply With Quote
Old 23rd December 2012, 08:46 PM   #118
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
I'm really enjoying them (been on for hours now)....They never sounded better.

The plywood/angled/sand boxes may be helping

btw, only using 1.5oz of speaker wool.

Over the last several weeks, been trying different caps for tweeter:

3.9uf - Highs were a bit hard to hear
6.0uf - Too large (but some songs sounded great!)
4.7uf - Seems to be in the right range - a nice balance
  Reply With Quote
Old 23rd December 2012, 10:30 PM   #119
system7 is offline system7  United Kingdom
diyAudio Member
 
system7's Avatar
 
Join Date: Aug 2008
Did you ever find a PDF with frequency response for the Peerless 832591 4 ohm driver, ODougbo?

Reason I ask is the Peerless 832592 8 ohm version is just crying out for a notch filter at 4kHz.

15uF and about 0.1 mH and 1.5 ohm in series on the bass shunt for a 4 ohm speaker...

It's just nagging away at me. Haven't calculated the coil exactly, but it's in the right ballpark.
Attached Images
File Type: png Peerless_832592.PNG (74.2 KB, 15 views)
__________________
Well, there it is! Best regards from Steve in Portsmouth, UK.
  Reply With Quote
Old 24th December 2012, 08:41 AM   #120
ODougbo is offline ODougbo  United States
diyAudio Member
 
Join Date: Aug 2011
Location: Maryland USA
Never found the PDF - there must be one out there. I'll email Madisound; this was a popular woofer years ago, there must be documentation.

My speaker buddy is set up with ARTA, I'll see if I can twist his arm and see if he'll measure them.

[btw, the woofers have layer of silicon and dust caps were removed]

[btw II, I had some the 8ohm (832592) didn't have the same punch as the 4ohm]

Last edited by ODougbo; 24th December 2012 at 08:52 AM.
  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
5 Way Crossover design *HELP!* beeferer Multi-Way 18 21st June 2011 01:39 PM
Crossover design hybridfiat Multi-Way 27 20th July 2008 01:07 PM
need help with this crossover design Xristo Multi-Way 2 14th January 2005 05:39 AM
Crossover Design ! postman Multi-Way 21 15th April 2003 07:36 PM
Crossover design Bose(o) Multi-Way 23 11th February 2002 07:22 AM


New To Site? Need Help?

All times are GMT. The time now is 04:06 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