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PD.186 / 186.2

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levyte357- View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2014 at 5:27pm
Originally posted by ArthurG ArthurG wrote:

Original 186 and V2 are the same, only chassis change. From the start, this driver had a high qts (>0.45). Datasheet was wrong. 

Excellent.

Any chance you could list the measured parameters of the V1 & V2 parameters side by side ?
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MarjanM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2014 at 5:31pm
Originally posted by ArthurG ArthurG wrote:

The day you will truly measure parameters in real life, instead of believing on manufacturers marketing sheets, you will have an heart attack LOL

Amen to than! :-)
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Pasi Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2014 at 8:12pm
Originally posted by MarjanM MarjanM wrote:

Originally posted by ArthurG ArthurG wrote:

The day you will truly measure parameters in real life, instead of believing on manufacturers marketing sheets, you will have an heart attack LOL

Amen to than! :-)


Indeed.

And when you measure them under large signal behavior you'll be even more baffled :)
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bee View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bee Quote  Post ReplyReply Direct Link To This Post Posted: 28 April 2014 at 9:39pm
Originally posted by MarjanM MarjanM wrote:

Originally posted by ArthurG ArthurG wrote:

The day you will truly measure parameters in real life, instead of believing on manufacturers marketing sheets, you will have an heart attack LOL

Amen to than! :-)
 
2nd that, I even got shot down in another thread for saying the 186 is not a horn driver....
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MarjanM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 29 April 2014 at 12:38am
The moment when you get exited about the fact you got a pair of sparkling new 12 inches you want to test for the first time. Priceless.
Then you measure them. One has a Fs of 77Hz the other one is 115Hz.
Ooops.
Marjan Milosevic
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levyte357- View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 29 April 2014 at 12:44am
Originally posted by MarjanM MarjanM wrote:

The moment when you get exited about the fact you got a pair of sparkling new 12 inches you want to test for the first time. Priceless.
Then you measure them. One has a Fs of 77Hz the other one is 115Hz.
Ooops.



Surely legal action can be taken if manufacturer specifications wildly differ from actual ?

Do large audio firms tolerate this?
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MarjanM View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote MarjanM Quote  Post ReplyReply Direct Link To This Post Posted: 29 April 2014 at 12:47am
That was P-audio SN12MB. Still have those two somewhere in some boxes. My first and last encounter with P-audio.
Marjan Milosevic
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Post Options Post Options   Thanks (0) Thanks(0)   Quote QSS Quote  Post ReplyReply Direct Link To This Post Posted: 29 April 2014 at 1:33pm
Get both drivers in question and measure them yourself, or get someone with the right equipment to do it for you. Even it's just to satisfy your curiousity, Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote fourway hornloaded Quote  Post ReplyReply Direct Link To This Post Posted: 02 May 2014 at 4:28pm
A speaker store in Praque measured the T/S:

good-old PD186: http://www.prodance.cz/files/dl/1/1979/TS_PD186.pdf
PD 186 MARK II: http://www.prodance.cz/files/dl/8/15605/PD186_2.pdf

Interesting site, they also have measurements of RCF LF18P400 and 'G400.

I'm not sure if I'm yet ready to accept that the reincarnation of what I thought to be the greatest mid-BL 18" driver available has a Qts between 0,52 (published) and 0,67 (measured).






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levyte357- View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote levyte357- Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2014 at 1:05pm
Originally posted by fourway hornloaded fourway hornloaded wrote:


I'm not sure if I'm yet ready to accept that the reincarnation of what I thought to be the greatest mid-BL 18" driver available has a Qts between 0,52 (published) and 0,67 (measured).


Once you can accept, that "some" manufacturers (and distributors), will lie through their teeth, to get your hard earned into their pocket, you can accept most things in the sound world.

At least Celestion,  B&C,  RCF, Beyma, 18sound, still make decent 18" reflex drivers.

Waiting to see how long it takes for this thread to be locked or deleted.LOL


Edited by levyte357- - 05 May 2014 at 1:06pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote PauliePaul Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2014 at 10:46am
LOL
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tweeter_Box Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2014 at 10:46am
Originally posted by fourway hornloaded fourway hornloaded wrote:

A speaker store in Praque measured the T/S:

good-old PD186: http://www.prodance.cz/files/dl/1/1979/TS_PD186.pdf
PD 186 MARK II: http://www.prodance.cz/files/dl/8/15605/PD186_2.pdf

Interesting site, they also have measurements of RCF LF18P400 and 'G400.

I'm not sure if I'm yet ready to accept that the reincarnation of what I thought to be the greatest mid-BL 18" driver available has a Qts between 0,52 (published) and 0,67 (measured).








need to get these guys to measure old chassis pd1850 alongside new chassis Wink
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