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RARE! Time Windows squared! drawn-out story and pics inside!

post #1 of 45
Thread Starter 
Ok, so I've been asked to post these in the forum.

If you know of DCM speakers - the REAL DCM speakers of Ann Arbor, MI pre-MTX buyout - then you know they were known for killer soundstage and presence. Ive owned around 20 different models at one time or another, and the the (Time Frame) tf600's were the reason I even got into stereo and Hi-Fi.

A year ago my uncle passed away. While cleaning out his house I found a monstrous pair of speakers. Light wood veneer, black grill cloth nailed in place, separate speaker housings connected by jumpers. and HEAVY. As I approached them I noticed something oddly familiar despite never seeing anything like them before. The cabinet shape from the top down was an almost truncated and rounded pentagon. I frantically searched for a placard to reveal the identity of these mysterious behemoths.

There it was: DCM

But it said Time Windows. How can that be? I know Time windows. I'd owned the originals, the 1a's, and the 3's, and had seen/heard the 7's before...
But then, there... in superscript was a "2" not as in TW2 but ^2. squared.

I was floored.

How could these have been hidden from me?
How could I have never even heard of them after all my research into DCM speakers? Where is the nearest amp?!?!?!

So I immediately stopped all work and lugged the pieces down to my car. The suspense was killing me! The day dragged on, until finally we were done. In two seconds, I was slamming the door to my deville and peeling down the long driveway.

In no time i had them standing in my listening room where theire brothers, the original Time Windows were sitting minutes earlier. I pulled GFA-555 mk II forward and ran the lines to the back of the speakers.
I swtched on the source, the amp, the pre-amp...

ahhh! still silence - either a good sign or a very bad one.

i throw myself in the chair nervously...

I press play on the remote, then...

blah.
lifeless boring flabby music dumps into the room.

W. T. F...

ok so that was way more drawn out than it need to be but if youre still with me, i firstly apologize, but fear not!

I messed around with them for hours. and hours. changing sources, changing placement, changing components, and cables. I tried it all. They just sounded terrible. I was convinced it was the electronics, but not worth my time. I was set on putting them up for sale the next day.

When I woke up I had one last thought: what if I'm just not giving them enough power? I ran downstairs, pulled out the GFA-555 again which makes 205W x 2 into 8 ohms. but could be mono'ed for over 650W into 8 ohms. If this didn't work (or start them on fire) the were surely going to the curb. I use 4 of these amps in my HT so I grabbed another and set them up. I slumped into the chair and pressed play ready to be underwhelmed.

What happened next could only be described as "that moment"
Where you couldnt tear that stupid grin off your face if you wanted to.
Where the hairs on your neck stand up and you get a chill down your spine.
If you're addicted to audio, you nkow this feeling. it's your "fix" its what we're all chasing.These speakers made me feel it all over again as if you had lifted a steel box up from around them. powerful. refined. crystal clear. and OPEN. I mean montana open! I played albums for 8 hours straight rediscovering music all over again.

I'll stop the long-winded dramatics but I'm sure you understand what I'm describing. But to sum up my idea of these speakers, given POWER - ultra-clean, high current, unfettered POWER - these outshine any DCM product ive had the pleasure of listening to. And thats saying a lot.

Outside of DCM i own/have owned walsh ohm's, polk SDA SRS's of varying sorts, Mirage, NHT's, tannoys, vandersteens 2ce's, Dahlquist DQ-10's, and more of varying degrees of quality, and these DCM Time Windows Squared are my current favorite to listen to.

If you actually read all of that I thank you! But without further agonizing ado, the pics:











post #2 of 45
Thread Starter 
so my reason for posting this is because i'd really like to find out some information about these. I cant find specs/info anywhere. I'd really like to re-veneer these and get them back to/better than their original condition. If you know anything (AT ALL) please let me know or just drop a message and let me know what you think!

Thanks!!!!
post #3 of 45
Thread Starter 
Oh, also of great wonder to me is those six silver dots on the bottom of the top cabinet. you can see a dark black box with six silver dots in a row. these are actually what appear to be dials (pots?) recessed into the cab. for what? i have no idea.

additionally, id love to know what these look like under the grills but have not pried it off as of yet. but have seen a pic or two floating around of the large cabinets but not the woofer cab. im afraid ill never get the cloth back on and until im ready to redo these id rather leave the snagged cloth on...
post #4 of 45
Thread Starter 
oops! 5 dials not 6! haha!
i swear ill stop typing... eventually!
post #5 of 45
Those have to be god's speakers, plain and simple.
post #6 of 45
Those dials might need to be cleaned? if they control the crossover some how they may have dead spots and could be why they needed a little more power to sound good.

What if you mark them and rotate them all the way left then all the way right then back to the sweet spot.

They might get better.

They are a neat design
post #7 of 45
Another thing i thought of, if you havnt yet looked at any of the drivers how do you know they arnt damaged? If the suspension around the cone is rotten it may damage the coil using them.

If the foam is ripped or tore the cone could sag in the basket and drag against the magnet and damage the coils?

Just a thought
post #8 of 45
Thread Starter 
Quote:
Originally Posted by BowerR64 View Post

Those dials might need to be cleaned? if they control the crossover some how they may have dead spots and could be why they needed a little more power to sound good.

What if you mark them and rotate them all the way left then all the way right then back to the sweet spot.

They might get better.

They are a neat design

Yeah, I dont know. Especially considering there are the 3 dials on the back...
the 3 dials are covered by a piece of tape (?) that appears to never been tampered with. no loose corners/edges, no air bubbles... i dont know, but a good point. I'll have to think on that some more and see if anyone else agrees perhaps?
post #9 of 45
Thread Starter 
Quote:
Originally Posted by BowerR64 View Post

Another thing i thought of, if you havnt yet looked at any of the drivers how do you know they arnt damaged? If the suspension around the cone is rotten it may damage the coil using them.

If the foam is ripped or tore the cone could sag in the basket and drag against the magnet and damage the coils?

Just a thought

I had thought of this in my initial trials and gently pried back the top of the grills. With a flashlight I could inspect the surrounds. The woofers seem to be an 8 or 9 inch type and with polypropylene surrounds and in very good shape as youd expect from that type.

I just meant that id like to see the speaker as a whole with no grills it could be quite attractive and a new veneer.

also there is no discernible (to me) distortion that would indicate driver failure.

I havent ruled out components of the crossover, however...


thanks for the comments and consideration though! i really appreciate it!
post #10 of 45
Thread Starter 
Has anyone seen or even heard of these before???
post #11 of 45
Quote:
Originally Posted by newrival View Post

Has anyone seen or even heard of these before???

Doing a google search pulls up a few images there is a few with the grills off.

Yours looks to be a flag ship modle i think. I really like the design of the seperate bottom cabinet with the main drivers and the midrange and tweeters on the top like you could seperate them if you wanted to rearange the bass part.

Even the name of them is cool
post #12 of 45
Those for some reason look vaguely familiar, problem is I was probably about 10 when I saw them

I remember going to audio shows with my dad down at COBO Hall in detroit and then later out to the Light Guard Armory when I was a kid, late 70's and early 80's I still to this day remember some of that stuff and how cool it was. DCM was always there as they were local.

have you tried to research the original founders of the company and contact them?
post #13 of 45
Hmmm interesting design, I am wondering of the five dials are more of a built in EQ than a crossover concept. Years ago (when i used a tapedeck) my EQ was just five levelers and each leveler handled a certain range of frequency. As mentioned mark where they currently are setting and fiddle with them, you may like what you hear.
post #14 of 45
Thread Starter 
Quote:
Originally Posted by UofAZ1 View Post

Hmmm interesting design, I am wondering of the five dials are more of a built in EQ than a crossover concept. Years ago (when i used a tapedeck) my EQ was just five levelers and each leveler handled a certain range of frequency. As mentioned mark where they currently are setting and fiddle with them, you may like what you hear.

thats a good point. i just have this fear of breaking seals on things lol
but marking the original positions is a good idea, and the eq theory seems logical and perhaps the most parsimonious explanation.
post #15 of 45
Quote:
Originally Posted by UofAZ1 View Post

Hmmm interesting design, I am wondering of the five dials are more of a built in EQ than a crossover concept. Years ago (when i used a tapedeck) my EQ was just five levelers and each leveler handled a certain range of frequency. As mentioned mark where they currently are setting and fiddle with them, you may like what you hear.

Well i dont know much about crossovers but ive seen a few speakers that have a dial on the back for the high end. I think i had a set ov D5 vegas that have a control pot on the back that did somthing to the tweeter maybe it just dialed out the tweeter?

Could they be level controls for each driver? like a controlable pad or somthing? like i said i dont know enough about crossovers maybe this wouldnt work but if they look like control pots they could need moved to some what clean them out if they have been sitting in one spot for years they may have developed a bad spot.

I dont see many speakers any more with any kind of pot in them maybe because they found out they develope problems over time. Ive seen some with say a midrange 0 -3 -5db setting and similar with the tweeters but nothing like a pot.
post #16 of 45
Thread Starter 
yeah these have 3 dials on the back "tweeter level," "midrange level," and "dispersion"
the 5 on the bottom are label-less unfortunately.
post #17 of 45
Thread Starter 
an interesting sidenote:

on the placard it says "for the audiophile who would rather listen to music than equipment"
post #18 of 45
New Arrival. where you at? I grew up just 30 min north of Ann Arbor. There was a stereo shop on the east side of Flint, called Todays Audio. Not to far from the ghetto. They used to carry all sorts of DCM gear. I saw some pretty wild things there, and remember TW7's quite well, although I was a teenager. Nowadays I see occasionally some oddball dcm stuff that is pretty rare. I saw for sale on CL some TW bookshelf models once! I just wonder if DCM made some experimental speakers, sent only to certian shops in certain markets? I just see so many pieces that are rare, odd and cool.
post #19 of 45
Thread Starter 
So i pulled the patent listed on the speakers placard and it offers some interesting insight into what those dials could possibly be! it states:

"a separate electrical circuit is inductively coupled to the filter network and is conveniently adjustable during assembly to vary the quality factor (Q-factor) of the filter. The inductively coupled circuits may be used with either the high-pass, low-pass, or both filter networks of the crossover. The physical configuration of the seperate circuit can be easily adjusted to counter variations in individual speaker or driver performance parameters."

heres a link to the patent: http://www.google.com/patents?id=GpI...page&q&f=false
post #20 of 45
Thread Starter 
they also could have nothing to do with that at all. haha!
post #21 of 45
Thread Starter 
dcmlover, im in chicago.
thats great that youre right "where the magic happens" as it were. i bet there were some awesome concepts. ive heard mention of time window fans with some 30 driver array, and have heard mention of a bookshelf tw version. crazy!
post #22 of 45
I am in denver now, there is a lot of DCM's here.... Just a lot of run of the mill tw's and tf's.

Check your pm I sent you about the b&k.
post #23 of 45
Thread Starter 
Quote:
Originally Posted by DCMlover View Post

I am in denver now, there is a lot of DCM's here.... Just a lot of run of the mill tw's and tf's.

Check your pm I sent you about the b&k.

no pm yet... maybe it takes a little while?
post #24 of 45
Heck If I know. How much do you want for it?
post #25 of 45
A black walnut veneer would look great. Very easy to do. PM me if you need to know how.
post #26 of 45
Thread Starter 
hmmmm well id like $1 million, but i think im going to have to settle for around $400. and ill even ship it to you. or maybe even hand deliver it to you (my sis is having a baby and lives out your way). it was around $1400 new in the 90's and even th 5 channel versions go for upwards of 500 used and this one is in excellent physical and operational condition. ill pm you my email address and you can tell me what you think.
post #27 of 45
you will be out in denver?
post #28 of 45
Thread Starter 
yeah shes in CO springs but have family and friends in denver and will be staying for a little while. just dont have the exact date nailed down yet...
post #29 of 45
Thread Starter 
AN UPDATE!!!!!
I uncovered a picture of the internals!

post #30 of 45
Thread Starter 
addaitonally ive read that others have had problems producing any quality sound out of them with low wattage. actually on every forum that theyre mentioned, that comment is made and then speculated they are underpowered.

one thread mentions the bottom cabinet as a "bass unit"

there are 2 - 6.5" drivers and 2 - 3" (?) tweeters in each top piece according to one thread. i will do all the confirming i can.

some places say 1999 some say 1983. judging on conditions of these and others, 99 seems highly unlikely
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