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Old 4th February 2005, 05:42 PM   #31
qwad is offline qwad  Australia
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sorry I just cant seem to let go of this thread there are so many issues raised in this thread in regards to the ' time windows' reading some of the other posts ie; the recommended vifa replacement of the tweeters; this raise a question do dcm really know what they are talking about? the vifas fs is 17000 hz which even a noob KNOWS; the accepted convention is to keep the fs of the tweeter at least one octave below the x/over point! meaning at least 1k as we all know in regards to which the philips units at parts express which are an updated version of the originals in the dcms now sport a soft dome fit the bill much better the fs being almost exactly 1k] the vifas is too close to the 2k x/over , leaving only 300 hz lee way the result? a deep null at the xover reminiscent to an out of phase driver poorly intergrated with the x/ over but of course if you cant see it and dont know about it cant hurt you can it? most likely if like me you are cloth eared you wont even hear it like someone else reported in his post earlier on after replacing the original tweets with the vifas and then waxing lyrical at how much improved [ smoother and detailed they are with the vifa upgrade; yes of course smoother, it has to be; how can anything sound like anything else if there is nothing there to hear? cheers to all and sundry inc, the moderators who may take a very jaded view of some of my posts..... calling a spade a spade
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Old 3rd March 2005, 06:39 AM   #32
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Hi.
I have had a few pairs of timewindows, including 1's and 1a's.
The timewindows used the philips woofers and tweeters, whereas the 1a's used philips woofers and vifa tweeters. I have a stripped pair of 1's I kept for parts. I have the crossovers which I could photograph if you need and details. (let me know via email)
The 1a's are a lovely speaker, although I noticed a slight difference in level between one of my matching speakers. It was only on close inspection when I ran an impedance plot, I discovered DCM had serviced/replaced in the factory, one of the 8ohm woofers with a 4ohm (they have the orange chalk marks that DCM used in the factory on them). So, perhaps at some stage in the product life, they changed woofers from 8 to 4 ohm models. The philips type numbers confirm this, but the drivers have never been out of the cabinet after they left the factory.
John
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Old 3rd March 2005, 04:02 PM   #33
qwad is offline qwad  Australia
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Well that's interesting, the pair l worked on for a friend had some US sourced round basket paper cone woofers, come to think of it there was some orange chalk marks on the cones, l seem to recall, replaced the torn rubber surrounds from my stock which l was fortunate to have, very similar to the originals luckily, l still have some though l did not dig too deep into the enclosures as l treat a lot of yank speakers with disdain and the contempt they deserve unless they are a serious mfctr ie;altec vot or some of the classic jbl's or ev's the rest l would consign to a dumpster.... ps please post a pic of the x/overs if you can as my friend who owned them tried to upgrade the caps and dug around inside the enclosure removing tons of some sort of wadding in the process and eventually leaving it out for better sound quality'cause with it in they kinda sounded muffled cheers TC
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Old 19th September 2007, 02:46 AM   #34
esqjd is offline esqjd  United States
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I just picked up a set of Time Windows at a sale for $20 (serial numbers 41918 and 41919). I had never heard of them before, but the price seemed right. In reading about them on this thread and elsewhere, I am curious about two things.

First, how does one know the version (1, 1a, etc). I have no idea the age or series of the Time Windows I bought and would like to be able to place them in their historical context.

Second, in listening close to the woofers at low volume, i hear a slight flutter or buzz on bass frequencies. I have looked over the speakers carefully and do not see any tears or defects in the cones (paper) or the surrounds (rubber). In fact, both look very clean. I am wondering if this is just something these speakers did. Can i replace the woofers with something newer/better and avoid this flutter/buzz.

FWIW, my woofers also have the orange chalk markings described by an earlier poster.
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Old 29th November 2007, 02:15 PM   #35
luismm is offline luismm  Spain
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Hi!
First of all, sorry for my english, Iīm from Argentina ...
I bought (really, when I heard them at J&R, the speakers bought me (o: ) a pair of Time Window speakers about 1980 in New York, and carried them to Argentina. After a lot or years and a lot of happiness, something was broken and an independent technician in Argentina tried to repair the speakers. They worked for some time, and problems again ..... Now Iīm living in Spain, and of course the speakers are with me (travelling speakers, yes), but they are not working, and I want to repair and leave them with their original great sound as possible.
I donīt know what the technician in Argentina did with the speakers. I know the tweeters are Philips AD 0140 T8 and seems to works fine.The woofers have no information at all in the back, so I donīt know if they are original parts or they arenīt. I donīt know if the crossovers are original or not, but I have a couple of photographs, If I can, Iīll put them with this message; if not, I can send them anywhere.
Ok, thatīs the story .... now, letīs go with the questions ....
First of all ... how can I know if they are TW1 or TW1a? The serial numbers are 26102 and 26103
I would like to know which woffers can I use in case the ones that are in the speakers are not Ok.
Also, I need all the possible information about the crossovers, same as woofers.
If my english is so bad you donīt understand something, let me know, please ...
Waiting for some response, thanks a lot!!!!!
Enjoy your DCMīs, as I hope to enjoy mines soon (o:
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Old 19th October 2010, 02:08 AM   #36
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Default Time Window 8-in driver repair/replace

hi Steven

You have a lot of technical info for the Time Window.

I need to repair or replace the 8-inch Philips drivers. The rubber seal around the edge was cracked in 1 place. Also the glue between the cone's edge and the rubber seal dried out and detahced.

What are some good replacements?

Thanks

Quote:
Originally Posted by Steven View Post
The original Time Windows come from around 1977, developed by Steve Eberbach and Bob Waterstripe. I have versions from around 1980, these use Philips tweeters, made in Dendermonde, Belgium. As far as I know the typenumber is AD0140/T. They were made in a 4 Ohm version (AD0140/T4) and an 8 Ohm version (AD0140/T8). I don't know which impedance was used in the original Time Window. The tweeters are both in parallel, so I guess it is the 8 Ohm version. Also the woofers are in parallel.
These tweeters are 1" high power dome tweeters. They are round (94.2mm diam.) with three screw mounting. They look different from the ones on your picture. From the Philips datasheet, they have a sensitivity of 94dB (1W, 1m).

I once blew the woofers of one speaker (DC on the amplifier output) and had to replace them, but at that time, around 1985, I was able to get replacement speakers, via the German distributor. The cones have a rubber sorrounding, no foam (no problem).

These are very nice loudspeakers. Later versions have a more rectangular shape, but are also called Time Windows, only with a higher number. The one you have are the Time Window 1, with the rounded top and bottom and cardboard like rear. You cannot remove the top and bottom, you have to remove the speakers from the front. This takes some effort because of the kit that is used.

Crossover frequency is 2kHz.

Steven
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Old 25th January 2011, 12:01 PM   #37
ElRoi is offline ElRoi  United States
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Over the weekend I was in Athens, GA and while perusing one of the many Antique/Salvage/Junk stores thereof, I was indoctrinated into the the Time Window cult for the reasonable price of $100. They are fully functioning and appear to be completely original. The speaker cover "socks" are in pretty damn good shape considering the their age.

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Old 25th January 2011, 03:19 PM   #38
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That's the 3rd different driver complement i've seen in Time Windows...

dave
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Old 25th January 2011, 07:03 PM   #39
ElRoi is offline ElRoi  United States
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From what I have gathered that is the original factory configuration for the 1A.

"The pic is the time window 1 with the round philips tweeter. The 1a has a square tweeter screen over the tweeter that can be felt through the grille. The 1a also has fabric covered 'eyelids' over the top of the woofer and only one port at the bottom. The 1 has two ports, one on each front face. The 1a has oak end pieces with a nut in the center of the bottom piece, the 1 has walnut? with glued on ends."
~Blue Shadow~

This is the "1" to which he is referring. He mentions that the 1 has "round tweeters" and so do the 1A's. They just look odd because DCM used some of the same fabric that they use for the "eyelid" on the woofer to, I assume, dampen the tweeters plastic surrounding:

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Old 26th January 2011, 04:47 PM   #40
ElRoi is offline ElRoi  United States
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