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Crossover Questions

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tah800

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Post Sat Jun 06, 2009 6:31 am

Crossover Questions

Just a few things I've noticed about the crossovers on my f----d up speakers I bought. First of all I should ask are the crossovers you're looking at are actual platinum models. I'm very familiar with the Originals but have not taken much notice of the Platinums. Secondly I noticed that one of the crossovers is upsidedown in relationship to the other. One of the speakers looks it was very professionally wired while the other(the one with the marettes between the crossover and ribbons seems to have been messed with. The upsidedown one probably does not affect the performance but it does explain some of the cockeyed wiring I think. If I'm doing the refit maybe I should flip the thing over. Just wondered what you thought of it.
New speaker Problems 010.jpg
New speaker Problems 010.jpg (837.08 KiB) Viewed 884 times
New speaker Problems 011.jpg
New speaker Problems 011.jpg (851.41 KiB) Viewed 894 times
P.S. The crossover in the second photo is on the speaker that looks like it was professionally done. Art
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BillD

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Post Sat Jun 06, 2009 9:02 am

Re: Crossover Questions

The crossovers look the same and appear to be for Plats. But I would have expected them to be somewhat different than real plat crossovers because of the Honeycomb woofers. I thought it would be a hybrid between original amazing crossovers on the woofers and platinum crossovers on the ribbons. The woofer part (down where the thing that looks like a transformer in true plats is an 85mH inductor and a 450µF 150v capacitor. Does that match?
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tah800

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Post Sat Jun 06, 2009 10:50 am

Re: Crossover Questions

Hard to answer that, As you can see by the numbers on the pictures there's nothing like that.
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BillD

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Post Sat Jun 06, 2009 11:35 am

Re: Crossover Questions

I wish someone would chime in here that has upgraded Originals -> Platinums to tell us what their crossovers look like.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
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Eddie

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Post Sat Jun 06, 2009 5:48 pm

Re: Crossover Questions

If you take the crossovers off and on the mounted side may have a part number on it the plat's crossover part number is
601-00528-00. Looking at the schematic for the originals and plats I would have to say those are plat crossovers!

Here is the tread with a pic of Skip's crossovers from his plats!

viewtopic.php?f=3&t=8615&p=89900#p89900
Last edited by Eddie on Sat Jun 06, 2009 7:02 pm, edited 1 time in total.
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TNRabbit

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Post Sat Jun 06, 2009 5:53 pm

Re: Crossover Questions

BillD wrote:I wish someone would chime in here that has upgraded Originals -> Platinums to tell us what their crossovers look like.


weitrhino has a pair...send him a PM.
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tah800

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Post Sat Jun 06, 2009 6:01 pm

Re: Crossover Questions

Anyone heard this theory about Originals converted to Platinums having a hybrid type crossover. I've never heard that one before. Art
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BillD

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Post Sat Jun 06, 2009 7:48 pm

Re: Crossover Questions

Well, sure, I'm speculating, but the woofers in your Originals didn't get swapped when you upgraded the ribbons, and the two types of woofers are very different.
OBI56 wrote:it wasn't the woofers that were harder to drive, it was the dual 30" ribbons that were a killer load for most amps. The honeycomb woofers are NOT interchangeable with the cone ones (different impedance, different wiring, different crossovers) and the swapping the dual 30" ribbons for the 60" ones also requires a different crossover. What you have there are upgraded originals, not anything oddball. What would be considered oddball would be 4 cone woofers with dual 30" ribbons; a combination that was never made.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
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weitrhino

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Post Sat Jun 06, 2009 10:32 pm

Re: Crossover Questions

TNRabbit wrote:
BillD wrote:I wish someone would chime in here that has upgraded Originals -> Platinums to tell us what their crossovers look like.


weitrhino has a pair...send him a PM.


Yes, mine are upgraded originals. It's late now and we have guests over for the night, but I will try to get pics of my crossovers up tomorrow.
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skip

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Post Mon Jun 08, 2009 6:58 am

Re: Crossover Questions

Those are Plat x-overs. I've never heard that updated originals used anything but the standard Plat x-over. Not positive, but I think the honeycomb woofers are the same 16 ohm as the Plat woofers and present the same 4 ohm load.
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BillD

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Post Mon Jun 08, 2009 9:12 am

Re: Crossover Questions

Skip, that in itself would dictate a different crossover.
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
Sunfire:Theater Grand III processor, Ultimate Receiver, Cinema Grand Signature 400 ~ seven, True Subwoofer Mk. II, D-10 Subwoofer
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docadillac

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Post Mon Jun 08, 2009 11:48 am

Re: Crossover Questions

I have seen schematics of the crossovers somewhere. I just can't remember where. I believe that the impedance of the woofers in the Originals is quite different from the Platinums. I know that the Dynavox woofers are different because it's stated in their specs. That would mean a change in the crossover is a necessity. I hope you get them back to a state where they sound their usual glorious selves.
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skip

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Post Mon Jun 08, 2009 12:16 pm

Re: Crossover Questions

I've always heard the upgrade kits were just 60" ribbons and Plat x-overs. Changing out the woofers wasn't necessary.
Sasquatch
TnRabbit's Assistant Official OCCD Enabler.

How long a minute is, depends on what side of the bathroom door you're on.
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skip

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Post Mon Jun 08, 2009 12:28 pm

Re: Crossover Questions

In looking at mine, those aren't exactly plat x-overs. Not sure which model they are. I'll have to check the schematics.
Sasquatch
TnRabbit's Assistant Official OCCD Enabler.

How long a minute is, depends on what side of the bathroom door you're on.
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BillD

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Post Mon Jun 08, 2009 1:21 pm

Re: Crossover Questions

Skip, if you have the schematics for the upgrades originals (60" ribbons and honeycomb woofers), I'd really like to have a look at them. Can you post them or give me a PM?
It should sound like it isn't there!
There is a difference between hearing and listening...
Making life enjoyable through expensive electronics.
_________________
Carver: C-4000 & C-1 preamps, PSC-60 preamp/tuner, TX-11a tuner, M-400 (2), C-500, M-500, M-500t, M-500t Mk.II, A-500x, AL-III loudspeakers (2 pr.)
Sunfire:Theater Grand III processor, Ultimate Receiver, Cinema Grand Signature 400 ~ seven, True Subwoofer Mk. II, D-10 Subwoofer
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