DCM Time Window Overhaul

Picked up a pair of early DCM Time WIndows a few months ago. Back in the late 70's I had wanted a pair, but went the Polk Monitor 10 route. Decided to bring them back to life. Refinish the end caps, rebuild the crossovers, and new "socks". Biggest challenge is that these were built with no regard to ever taking them apart or working on them. Spent a lot of time formulating a plan and put in lots of labor. But they are done and burning in. I will add some of the steps I went through in the next week or so, so if there are others that want to dig into a pair of TW's they will have a little info. Also will be burning in the c/o's and will report on that. Right now they have a nice wide sound stage compared to the Monitor 7's but the upper end is not as good as the 7's. Here are a couple of pics.









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Comments
I like the name of these speakers "Time Window(s)". It's up there with Totem's "Rainmaker(s)" in the great speaker name category.
I've owned 2 or 3 prs. of the Time Windows and hated selling each pair not knowing if I will ever get another pair.
I LOVE their sound and THAT BASS and sound-field too.
I always elevated them on flat 4 or 5 inch risers. It helped with those highs you say are a little less than the Polk 7's.
It was a clever design trope, later mimicked (e.g.) by Nelson Pass's epochal El Pipe-O subwoofers.
Speakers: Harbeth: 30.2, SHL5+; Usher: Be-10, T-515; Rosso Fiorentino: Elba, Pienza, Certaldo, Fiesole, Volterra; Polk: T50, Signature S15, RTA 15tl, RTi12; Sonner Audio Allegro Unum, Legato Unum, Legato Semis, Legato Duo; Emerald Physics CS-2.8; Klipsch KLF-20
Preamps: Shuguang S200MK, Dayens Ampino, Parasound P5
Amps: Shuguang S845MK, Dayens Ampino Monoblocks, Parasound A23
Integrateds: Triode Corporation TRV-88SER, MastersounD: BoX, Dueventi, Compact 845, Evolution 845; North Star Design Blue Diamond
Sources: AURALiC Aries, Denon HEOS Link, North Star Design: Magnifico, Supremo, Incanto, Intenso, Venti
Cabling: Wireworld
TV: Sony XBR-75X940C
Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer
Cables: Speaker: Furez 10/2 with GLS Locking Banana Plugs
Interconnect: Furez 10/2 with SpeakONs
ICs: Custom Furez by Douglas Connections
Den:
Bose 901 Series II Continentals Restored, Re-Built Equalizer with Elna Silmic IIs, Sonicaps, and Silver Mica Caps
Carver CT-3 Pre, Carver C-500
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"And keep her under 70, would you, huh? Betty likes a slow ride"
HT - Polk 703's * NAD T-758 * Adcom 5503 * Oppo 103 * Samsung 60" series 8 LCD
Next I pried the crossover off the top of the cabinet. They used so much adhesive the board was pretty much ruined. No worries, as I was going to use new boards and components and completely rebuild them.
Next step was to get the rest of the drivers out. Took some doing with a heat gun, needle nose pliers, putty knives etc and a bit of elbow grease. Once they were all removed I was able to pull the dampening material out and reach down to the wood screws that held the bottom end cap in place. Once the screws were out I was able to tap the end cap off off the bottom of the cabinet. The bottom was cut off using the jigsaw. There was a lot of time spent cleaning the Black Death off of the drivers and the cabinet. I also had to patch the driver openings a little here and there where they were damaged removing the drivers. After the cleanup was completed I spray painted outside of the cabinet with flat black paint.
Next up was to rebuild the crossover.
Next up, getting the top back together and re-installing the drivers.
I own the TF350's now and I re-foamed the surrounds myself. Easy to do once you figure how to remove the top board. I read to bang it off. Well, it didn't move up to the point I figured I need to feel under it. Sure enough, lag bolts holding it on.
But anyway, I also have owned the TF400's.
Both are superb sounding speakers!
They aren't up to the Time Windows but then again, they don't cost as much either. You get half the speaker but 5/8 of the sound. Those TF1000's are something else. here is one guys' opinion.
https://www.stereophile.com/content/dcm-time-frame-tf1000-loudspeaker
The TF600's are pretty powerful I've read. But they are directional.
Can't go wrong with any of them. Maybe the TF250 might be a starter pair.
5.1 - Definitive Technology ProMonitor 800 x 4 : ProCenter 1000 : Klipsch Sub-10 : Pioneer Elite SC-91: DIRECTV : LG OLED55B6P : Roku Premiere+
Garage Duty - polk Monitor 10s : Pioneer A-717 Integrated Amp : Squeezebox Classic
For the new socks I bought some 1/4 foam. It is not jet black, more of a dark charcoal but it works. I used a continuous strip of velcro instead of nails to attach the sock. It will be much easier to remove if need be.
Side note: After dismantling both speakers I discovered there was a dead 6 1/2" driver in each cabinet. I would be hard pressed to find those octagon drivers so I had them rebuilt.
Second TW overhaul went much quicker. They continue to burn in and I will report back after 200 - 300 hours of burn-in.