Go Back   Home > Forums > >

series/parallel wiring for a n=5 line array
series/parallel wiring for a n=5 line array
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
Old 20th June 2021, 11:50 AM   #1
muxelles is offline muxelles  Belgium
diyAudio Member
 
Join Date: May 2021
Default series/parallel wiring for a n=5 line array

Hello,

I want to wire up a 5-element line array of full range speakers with the following amplitudes [1/2, -1, 1, 1, 1/2].

Using Dayton ND65-8 drivers for this example: Re = 7.4Ω, Le = 1.04mH @1K

Is this correct? and do I need a Zobel Network for the 2x1/2 amplitude speakers?

Click the image to open in full size.
  Reply With Quote
Old 20th June 2021, 05:55 PM   #2
planet10 is offline planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
series/parallel wiring for a n=5 line array
Zobels are for the amplifier not the speaker.

Like this:

series/parallel wiring for a n=5 line array-5-drivers-wiring-png

The wiring i figure is more accurately [1,-⅔,⅔.⅔,1]

dave
Attached Images
File Type: png 5-drivers-wiring.png (10.5 KB, 242 views)
__________________
Stay safe. Stay home. Respect the 2m bubble.
  Reply With Quote
Old 21st June 2021, 08:29 AM   #3
muxelles is offline muxelles  Belgium
diyAudio Member
 
Join Date: May 2021
I see how you get [1,-⅔,⅔.⅔,1] from the diagram.

But how do I wire up [1/2, -1, 1, 1, 1/2]?

Also, is there an easy too to draw up these diagrams?
  Reply With Quote
Old 21st June 2021, 02:22 PM   #4
wesayso is offline wesayso  Netherlands
diyAudio Member
 
wesayso's Avatar
 
Join Date: Jul 2007
Looks like you're trying to get a Bessel array, see:
A Paul Kemble web page - speaker bessel arrays.

series/parallel wiring for a n=5 line array-bessel1-gif

And:
https://www.pearl-hifi.com/06_Lit_Archive/15_Mfrs_Publications/Harman_Int'l/AES-Other_Publications/Effective_Performance_of_Bessel_Arrays.pdf
Attached Images
File Type: gif bessel1.gif (4.0 KB, 97 views)
__________________
Use Science to design your speakers and they will sound like a piece of Art...

Last edited by wesayso; 21st June 2021 at 02:25 PM.
  Reply With Quote
Old 21st June 2021, 06:17 PM   #5
muxelles is offline muxelles  Belgium
diyAudio Member
 
Join Date: May 2021
That’s perfect. Generally speaking, what’s the trade off between choosing the series vs parallel configuration? Is the critical issue if the amp can drive a 2.8ohm load?
  Reply With Quote
Old 22nd June 2021, 04:30 PM   #6
TMM is offline TMM  Australia
diyAudio Member
 
Join Date: Sep 2007
Location: Australia
Send a message via AIM to TMM
yes. 2.8ohm may damage your amp or cause elevated distortion from the amp. At 28ohm it may not go loud enough before the amp clips.

I actually like your original idea the best, as it has the potential to give a near 8ohm impedance. The resistor and capacitor should be a resistor and inductor instead. The resistor/inductor act as two series dummy drivers that have an impedance that looks like a driver but makes no sound. Therefore, they should equal the Re and Le of two drivers so R=14.8ohm and L=2.08mH.

It will not be perfect as the Re and Le T/S parameters are a simplified approximation. They do not take into account the mechanical resonance and the fact that the voice coil inductance is lossy, however I think the effects will be minor. The -1 driver will likely drive a little louder in the bass and treble than it should because of this. If you're keen you can experiment in software like Xsim and add more components to try to make the dummy circuit more closely approximate the real impedance.

Last edited by TMM; 22nd June 2021 at 04:37 PM.
  Reply to this post

Reply


series/parallel wiring for a n=5 line arrayHide this!Advertise here!
Thread Tools

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Line array Open Baffle using Line array wavegudes juliopr Multi-Way 28 30th March 2019 03:58 PM
Wiring a line array: altering wiring schemes for matching levels w/woofer dave251 Multi-Way 6 5th February 2014 01:21 AM
Series or Parallel / Bridge or Parallel? Tenson Chip Amps 2 3rd October 2011 12:53 AM
winISD calcs: parallel vs series-parallel sadams Multi-Way 1 20th February 2011 07:45 PM
Series-Parallel Or Parallel-Series shaan Full Range 43 13th December 2009 04:10 AM


New To Site? Need Help?

All times are GMT. The time now is 11:35 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 13.64%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki