Activating Wilmslow Audio Allegro / Volt/Morel - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 26th March 2015, 08:21 PM   #1
diyAudio Member
 
Join Date: Mar 2015
Default Activating Wilmslow Audio Allegro / Volt/Morel

Currently have the Volt 2202/Morel Caw/538 ,MD32 tweeter in a passive cabinet .Driven by home built White noise 125 watt stereo amplifier.All vishay and high quality parts.
I would like to go active due to needing better quality louder sound in a much larger room.
Need help and advice as I have seen some half decent active crossover kit both 2 way and 3 way. K M Tech design Burnley UK.
I have enormous amounts of bits left over from previous projects including cabinets heatsinks etc the lot.
My source is now just a modified Denon 3910 player plus an unmodded version.
Passive all vishay Volume pot. (Passion?) All sacd/fi rez as I can still hear the difference.

My thinking was either Use a plate amp ready made for the Volt 2202
and the White noise for mids and also make/purchase a half decent amp for the tweeters.
Possibly 50ish plus watt for tweeters.
Alternative is build another.
Probably want to use the existing xover points 450 and 3500? However plate amps Ive seen usually adjustable only up to 200 hz point .
I gather that the Morel mid will go down that deep and is in enclosed portion of speaker cabinet.
Any suggestions thoughts (Volunteers?)

thanks in advance
  Reply With Quote
Old 27th March 2015, 09:24 AM   #2
C37 is offline C37  Belgium
diyAudio Member
 
Join Date: Mar 2003
Location: Brussels
Hi, Since you already have the passive filter components, you could start with a part active set-up from bass to mid and keep the mid/tweet passive. You'd still get most of the active improvements with two (good) amps and can get the 3rd one funds allowing.
( Get a 3 way xo to cover future needs)

Eventually upgrade some components in the passive xo.

Just my 2c
__________________
Ohm sweet ohm
  Reply With Quote
Old 27th March 2015, 09:40 AM   #3
diyAudio Member
 
Join Date: Mar 2015
Hi and many thanks
Yes I had considered this as an option and it would in deed be the easiest
way. Probably looking for someone who has played around with either of the two bottom units.Cost is not really a problem.
A plate amplifier exist for 200 hz xover..Makes it even easier.
Must admit I have been playing around with speaker design for over 30 years but never really achieved what I want to hear except with a rather simple second order xover with the Volt 2202 and similar for the tweeter in a two way set up.However volume levels became a problem in upper range of bass/mid.
This would be a bigger problem in the bigger room.
I added the mid range to the otiginal studio monitors and then bought Allegro cabinets to try and resolve the problem and gave up after the Wilmslow audio design didnt sound right and I varied the components but eventually was happier with a first order / 2 order on the three way as I suspect the mid range is slightly under sensitive at 85/86 db level..

Going active was the only way I could see around it.
Quality of parts not really an issue.Have numerous high end caps (even the odd teflon)
  Reply With Quote
Old 27th March 2015, 10:08 AM   #4
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Either build a big amp (I'd say 400W +) or buy a module from BK Electronics. Or a pro amp.

The filters in amps will probably not give the acoustic response required.

Have a look at the thread designing crossovers without measurements, as it sounds like you need to do some reading up.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote
Old 28th March 2015, 01:27 PM   #5
diyAudio Member
 
Join Date: Mar 2015
Hi many thanks for the link to a very very good thread.Only wish I had all that information posted 45 years ago I would have ignored several if not lots of technical advice .Explanations went a long way to refresh these old grey cells.
Also think Allen B deserves a medal for his efforts.Way beyond the normal call of duty. It was really helpful even though it is mainly passive crossovering...their was enough info re active units to encourage me to carry on.
After page thirty one semi exhausted ,I thought I could ask a few questions not covered which have occured to me over the many years which might help someone.
Meanwhile due to lack of enough energy ie medical reasons I will probably go for the simplest way of getting the system running as per c37 suggestion and to that end I will go active for bass and risk using the Boston XS plate amplifiers for the two Volt 2202 and see how they intergrate with the Morel (boxed in CAW538).
Just have to decide where put them. Room 28ft x 15 x 10ft)
If this gets close then I will then fine tune the crossover point when I go active..2nd or 4th order
Will have to use some test tones for now and also use the existing tweeters 2nd order xovers for mid upper and tweeter. (MD32S)
Historically I have always preferred less parts in a crossover from a sonic point of view and 3d imagery is a major factor in my enjoyment a long with tonal accuracy.
Once again many thanks.
  Reply With Quote
Old 28th March 2015, 08:29 PM   #6
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Glad you found the information useful.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote
Old 29th March 2015, 11:56 AM   #7
C37 is offline C37  Belgium
diyAudio Member
 
Join Date: Mar 2003
Location: Brussels
In case you need it, online signal generator: Sine Waveform | Online Sine Tone Wave File Generator

You can download them as .wav
Best,
__________________
Ohm sweet ohm
  Reply With Quote
Old 29th March 2015, 09:24 PM   #8
diyAudio Member
 
Join Date: Mar 2015
Once again a big thank you and these and a few of the other tests will prove useful on top of the stuff I have already.
Of interest I found the Boston XO plate amplifiers a re 24db slops with a 180hz xover (and phase reversal switch.) Also thay are going to have to be in a seperate box as Im using a passive preamp (Short interconnects needed here) and also I am not prepared to mess about with the Allegro cabinets .
So i am not exactly sure what I will gain or prove testing with a natural roll off at ???? hz . I Just hope its lower than 180hz.or I am going to have a hole between the two lower units when I go active..
This has made me rethink the possible end game ie I will have to go 24 bit 3 way crossover (LinkRiley)
The spec sheets from each of the units show a rising impedence to 12 ish ohms at approx 86db sensitivity. mid and tweeter 90db I can get away with around about 50 watt amp or less for the tweeter.(active) unless anyone tells me different.

Alternative is for me to design some gain into the active xovers...Starts getting into a bit of a brain herz sitaution. Meanwhile I am going to have to get all my housework finished as the wife has got wind of the changes...
  Reply With Quote
Old 30th March 2015, 01:41 AM   #9
system7 is offline system7  United Kingdom
diyAudio Member
 
system7's Avatar
 
Join Date: Aug 2008
Location: Portsmouth UK
raffajaffa, I think you dropped a brick in going for that Morel CAW 538 midwoofer. Morel CAW 538 5" Cast Frame Woofer. It's only 85dB sensitivity and not matched to the Volt BM 220.8 if I am guessing the right Volt polypropylene Model.

The Allegro looks pretty good to me: ALLEGRO

A 5" Scanspeak or SEAS 90dB paper mid looks much better. I think you'd just have a better 3 way there, even on a passive crossover.

Then reuse the Morel CAW 538, and even the Morel MDT 32 tweeter for a nice little two-way.
__________________
Best Regards from Steve in Portsmouth, UK.

Last edited by system7; 30th March 2015 at 01:44 AM.
  Reply With Quote
Old 30th March 2015, 12:13 PM   #10
diyAudio Member
 
Join Date: Mar 2015
Hi Steve and thanks for comments and you may be correct as I have probably already given that impression.I will try to provide a longer details explanation of this long drawn out saga soon.Includes visits to WA (150 miles round trip and disappointment at demo using mundane cd/Sony amp)
I had in fact heard the Morel 2 way earlier demo with Audiosynthesis amp which I was familair.
BTW. These Morel units were in the first version WA version of the Allegro .Im also convinced the xover was theoretical. It works for the bookshelf speaker.
  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
allegro 300 questions (allegro 3000 vs polk s10) jqprill Multi-Way 8 6th June 2013 10:14 PM
WANTED atc & volt drivers or wilmslow k100 or prestige kits ed68 Swap Meet 0 23rd April 2013 04:32 PM
Help with Wilmslow Audio Forte RogerLancaster Multi-Way 12 22nd June 2011 08:34 PM
Wilmslow Audio still in business? jheoaustin Multi-Way 19 7th May 2004 08:30 PM
Wilmslow Audio chris haberland Multi-Way 1 6th February 2003 04:21 PM


New To Site? Need Help?

All times are GMT. The time now is 08:48 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki