Hi all, I've had a pair of Pageants since 1981 and always liked the openness and easy driving of the speakers, however, the bass was always papery and after owning some Spendor A6 speakers and some Q acoustics concept 20's, I feel the cabinet design could use an update.
I've been hoarding DSB208 units and spare Pageants sourced on Ebay and want to build a much dampened set of cabinets for them based on the new style of narrow and long instead of wide (as was favoured in the seventies).
I would also like to replace the tweeters if appropriate to improve on the sound, and perhaps the XO but the speakers are very much based around the DSB208 bass/mid unit.
I'm not electronically aware, but have built a chipamp and a 40hz T class amp (the most powerful one , I think it's the SP15x) so I can follow a wiring diagram, but not design circuitsmyself.
If there are any off the shelf answers to the above, please let me know.
I will be checking the woofers for scrape, so am aware of issues there, but have a pool of six DSB208's to choose from so I should be good to go.
Please offer any suggestions.
Thanking you all in advance. Julian
I've been hoarding DSB208 units and spare Pageants sourced on Ebay and want to build a much dampened set of cabinets for them based on the new style of narrow and long instead of wide (as was favoured in the seventies).
I would also like to replace the tweeters if appropriate to improve on the sound, and perhaps the XO but the speakers are very much based around the DSB208 bass/mid unit.
I'm not electronically aware, but have built a chipamp and a 40hz T class amp (the most powerful one , I think it's the SP15x) so I can follow a wiring diagram, but not design circuitsmyself.
If there are any off the shelf answers to the above, please let me know.
I will be checking the woofers for scrape, so am aware of issues there, but have a pool of six DSB208's to choose from so I should be good to go.
Please offer any suggestions.
Thanking you all in advance. Julian
Don't.
Or at least not from where you are now.
Go read lots more.
Then read even more still.
Especially all the threads here from people that want to 'redesign' their speakers into something better by replacing things as it can't be that hard.
Or at least not from where you are now.
Go read lots more.
Then read even more still.
Especially all the threads here from people that want to 'redesign' their speakers into something better by replacing things as it can't be that hard.
Starting point - learn to measure the TSPs & impedance plot of the DSB208s
You can download ARTA & make a simple jig to do that:
http://zobsky.blogspot.com.au/2008/01/simple-loudspeaker-measurement-jig-for.html
You can download ARTA & make a simple jig to do that:
http://zobsky.blogspot.com.au/2008/01/simple-loudspeaker-measurement-jig-for.html
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Thanks gents, all sound advice there. PeteMck, I'll give that a try although my pc skills are also not up to scratch, but such a simple circuit could tell me volumes about the drivers-I agree.
Mr (I-suspect-you're-not-as-cranky-as-you-make-out), I hear where you're coming from, and will read up more. Though I like the idea of the thought that I don't know what the outcome will be, except that i've found through experience that cabinets are rarely braced adequately due to cost in manufacture. On that plus side, I build a lot of furniture, and so will be able to navigate that end of it.
Regards, Julian
Mr (I-suspect-you're-not-as-cranky-as-you-make-out), I hear where you're coming from, and will read up more. Though I like the idea of the thought that I don't know what the outcome will be, except that i've found through experience that cabinets are rarely braced adequately due to cost in manufacture. On that plus side, I build a lot of furniture, and so will be able to navigate that end of it.
Regards, Julian
I suppose most people start with the idea of bracing and damping a cabinet. It's not as easy as it looks. Bracing can raise resonances into audibility. The braces themselves resonate! Rubbery damping pads on the cabinet sides are easy enough, and a good thing.
http://www.diyaudio.com/forums/multi-way/223174-interesting-read-i-found-lossy-cabinet-designs-harbeth.html#post3234256
Crossovers are two a penny really. There are probably half a dozen ways to build a two-way, the best of which is the old BBC ideas IMO:
Rogers Loudspeakers › LS5/9
It's based on impedance correction and passive bafflestep giving an easy amplifier load:
mh-audio.nl - Home
You then need to build something:
What you seem to have is a 7-8" paper bass, probably about 0.9mH inductance, and the famous old polycarbonate Isophon KK10-8 tweeter.
I think you must start by tracing the crossover circuit to have any idea what you are doing. Most people give up at this point, IME. 😀
http://www.diyaudio.com/forums/multi-way/223174-interesting-read-i-found-lossy-cabinet-designs-harbeth.html#post3234256
Crossovers are two a penny really. There are probably half a dozen ways to build a two-way, the best of which is the old BBC ideas IMO:
Rogers Loudspeakers › LS5/9
It's based on impedance correction and passive bafflestep giving an easy amplifier load:
mh-audio.nl - Home
You then need to build something:
What you seem to have is a 7-8" paper bass, probably about 0.9mH inductance, and the famous old polycarbonate Isophon KK10-8 tweeter.
I think you must start by tracing the crossover circuit to have any idea what you are doing. Most people give up at this point, IME. 😀
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