70's speaker drivers and crossovers worth reusing? - 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 25th April 2008, 04:39 AM   #1
diyAudio Member
 
Join Date: Apr 2008
Default 70's speaker drivers and crossovers worth reusing?

I have some half way decent old 70's speakers (Sansui sp-5500x 4 way with 16" woofers, a couple 6"? mids, a horn tweeter and a super tweeter.)

They sound good, really good, and might sound even better with upgraded fresh caps in the crossovers and with better boxes with more internal volume to let the woofers really open up.

The drivers are in really good shape but the enclosures are ugly as sin, looked cheap when new with fake plastic wood veneer and much worse now that is't all peeling off. I think they may be beyond just veneering them or covering with laminate.

Reading and searching for info on them some suggest they are really pretty decent speakers and can flat out exceed the sq of more current speakers in the thousands of dollars range and higher. Not sure if this is really true or uninformed BS. Since I have not recapped the crossivers I probably can't really tell the full extent of what they may be capable of.

I am thinking of re-using the drivers in a tower configuration and building new high quality thick and massively heavy fully braced cabinets. (probably 200lbs plus ea when done due to a plan of partly covering them in some 1 foot by 2 foot granite tiles I have left over from the kitchen remodel. (I am thinking that all that heavy mass can only help with the sq) Designed properly I could have replaceable front panel so I could upgrade drivers later even in they are a different size or layout.

I have most of the materials already...

Anyone think it's a project worth doing or should I just hold off until I can afford better drivers?
I do plan to recap the crossovers if I use them.

Ideas? Thoughts? Better low budget alternatives?
Attached Images
File Type: jpg smaller.jpg (38.1 KB, 438 views)
  Reply With Quote
Old 25th April 2008, 07:20 AM   #2
Shaun is offline Shaun  South Africa
diyAudio Member
 
Shaun's Avatar
 
Join Date: Aug 2001
Location: Cape Town, South Africa
Way off in the future I intend to rebuild my Yamaha NS1000 speakers with a low diffraction cabinet and symmetrically mounted drivers. I expect to improve its imaging this way (how do you find the imaging of that speaker?). I think that carrying out your plan should yield the same benefits.
__________________
Shaun Onverwacht
|||||||||| DON'T PANIC ||||||||||
  Reply With Quote
Old 25th April 2008, 08:56 AM   #3
diyAudio Member
 
Join Date: Apr 2008
Imaging could be better. Honestly I don't have any really good amps yet. The best I have now is a Rotel rb-850 but it only pushes 50 watts per channel. It's a good 50 watts but these big suckers need more. Also I think the original caps in the crossovers are really holding them back too. I've read that they need to be re-capped with some panasonic (I think FC?) or better.

The layout of the drivers and size of cabinets is just not optimal.

Troy
  Reply With Quote
Old 25th April 2008, 01:58 PM   #4
diyAudio Member
 
gtforme00's Avatar
 
Join Date: Oct 2004
I have a pair of SP-1700's and have enjoyed them as rock speakers. The imaging, as you pointed out, is odd and there is obvious combing in the midrange due to the dual wide-spaced midranges. I think the best feature of these speakers is the woofer, the cabinets are aperiodically loaded and the bass is very natural sounding.

Your 5500's look like they have better midranges than my 1700's. I support your proposal to make a new cabinet for your speakers, paying attention to modern design knowledge like diffraction control. I think the best opportunity for improvement in your redesign will be with the midrange and tweeter placement, and possibly a new tweeter altogether.

You will almost certainly have to tweak the crossover for your new enclosures. A good start would be to diagram the old crossover to see what you have to work with.

I'm also not sure about the whole tileing the loudspeaker thing. Maybe it would work, but I would be worried that the vibrations would cause the tiles to eventually come loose. Just throw together some baltic birch plywood cabinets and use clever bracing, then stuff them with insulation to taste.

Good luck with the project!
  Reply With Quote
Old 25th April 2008, 02:54 PM   #5
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Drivers look good...problems with imaging is probably due to messy front baffle layout...and the xo design
It may have helped if they had been mirror imaged...and maybe put on their sides...fore that you would only need a new front baffle design...yeah, I like this old style monitor look, and I am in the process of building such a thing
__________________
sometimes we know very little, and sometimes we know too much
  Reply With Quote
Old 26th April 2008, 10:02 AM   #6
diyAudio Member
 
Join Date: Apr 2008
A new tweeter is a good idea. suggestions on a nice smooth clear tweeter that doesn't cost too much? Also a new midrange shouldn't cost that much either right?

Would I then do away with the super tweeter if I got a new tweeter?

Troy
  Reply With Quote
Old 26th April 2008, 04:03 PM   #7
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
I've put many of these woofers aside for future use. As long as the surround hasn't gone stiff, these Atomix woofers are 1st rate. Efficiency is usually pretty good, so not a lot of power is needed, but the boxes are woefully small.

These are classic from the time when the Japanese speaker's arm race was predicated on the more was, the better. If you want to recycle the drivers, a 3-way, 3 driver with a new XO is the way to go.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 28th April 2008, 02:45 PM   #8
diyAudio Member
 
gtforme00's Avatar
 
Join Date: Oct 2004
Do your Sansui's have a switch that switches off one of the midranges? Mine do, and the imaging improves dramatically when just one midrange is playing.

I agree with Dave above, and also think that you could still see a positive change by just improving the driver layout with the existing drivers. I would put the midrange and tweeter drivers in a vertical array. Midrange, Supertweeter, Tweeter, Midrange in that order vertically. You could probably keep your existing crossover and still hear improvements over the old cabinets.

The next step up (and the one that I recommend) would be to find a good soft dome tweeter (maybe by looking at the comparisons at www.zaphaudio.com) and make a three way like Dave described. I like the Seas 27TDFC, but they are getting more expensive every quarter with the dollar going to cr@p. You might be able to reuse the midrange section of the crossover if it has the option to switch out one of the midranges, but you would need to find out what the upper crossover frequency is and design a tweeter crossover to match.

A further upgrade would be to replace the midrange and the tweeter and rework the whole crossover. This would also require that you invest in at least a basic level of measurement capability (about $40-80 worth of equipment and a good bit of time to learn how to use it).

A different path would be to keep the woofer for the bottom end and go with a full range driver for the top end. This is not my forte and I would defer to folks like planet10 to guide you through that.

Ultimately, your preferences will shape the outcome of this project and the best we can do is give you advice from our respective positions of expertise. This means we need to know what those preferences are, as well as what tools you are interested in learning to use (such as measurement equipment or woodworking tools). Let us know and we will be here to help.

Regards,
David
  Reply With Quote
Old 29th April 2008, 03:37 AM   #9
diyAudio Member
 
Moondog55's Avatar
 
Join Date: Jun 2007
Location: Norlane; Geelong: Victoria: Australia
I would rebuild the baffle, use MTM with the Vifa neo tweeter for the closest possible spacing and make sure they are mirror image pairs, if you use the Vifa neo you should not need a super tweeter.
Alternatively build a new box for the mids and set them on top of the old box in their own smallish enclosure.
How big is that mid-range?? I ask as they look similar to some I had in an old Tandy speaker and they happened to be Coral's and very nice.
__________________
QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"
  Reply With Quote
Old 29th April 2008, 04:20 AM   #10
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally posted by Moondog55
How big is that mid-range?? I ask as they look similar to some I had in an old Tandy speaker and they happened to be Coral's and very nice.
Sansui drivers were usuall made by Atomix. Some of the Atomix drivers do get categorized as Coral because many are similar and Atomix is not that well known.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  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
For Sale: Marantz HD880 Speaker Drivers/Crossovers & All Trim Pieces dtm1962 Swap Meet 4 26th March 2010 10:37 PM
Hi-end drivers and crossovers-near Toronto mclsound Swap Meet 2 9th January 2009 01:04 AM
Reusing old speaker cabinets. Good or bad choice? maurycy Multi-Way 2 4th January 2006 11:38 PM
Reusing speaker cabinet for fe167 MPM Full Range 5 5th October 2005 10:08 AM


New To Site? Need Help?

All times are GMT. The time now is 07:58 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