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kersley View Drop Down
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Joined: 18 September 2004
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Points: 21 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kersley Quote  Post ReplyReply Direct Link To This Post Topic: PD 1850
    Posted: 18 September 2004 at 12:04pm

Hi.

I a few weeks back i built the 1850 folded horn(speakerplans.com) laoded with the PD 1850, only 2 days ago I built the second cabinet, But this time I loaded it with P audio's 18" LF driver.

The difference is incredible, The P Audio out play the PD by far.I used an 900 watts per channel RMS @ 8 OHMS.. I found that the PD needed much more power to give the same output as the P audio.

To be sure I was not hearing things, i swap them around in position and in channel, Same outcome. By this point i was been laught at by my friends, I just purchased 6 x PD'S and 8 x P audio's.

even worse the PD 1850 was a cooked after 6 hours of extreme testing.

Can someone tell me what is going on ?? Are you guy's bias because the PD's cost more and British ?? are you guy's getting paid by PD ??

Help.

thanks
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biotec View Drop Down
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Points: 2932 		Post Options Post Options   Thanks (0) Thanks(0)   Quote biotec Quote  Post ReplyReply Direct Link To This Post Posted: 18 September 2004 at 12:51pm

Firstly if the PD was cooked after 6 hours use there's probably something wrong with it. I know a crew who use 6 of them (in scoops) and have reconed one of them in about 5 years.

I think you'll find that if you put 1.2 -1.4k into both of the drivers, the PD would sound much better. But I think you're right in that one of the worst things about the PD driver in the 1850 horn is that it needs soooo much power to bring it to life.
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Andrew View Drop Down
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Points: 669 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Andrew Quote  Post ReplyReply Direct Link To This Post Posted: 18 September 2004 at 1:32pm

Many of the driver recomendations are now revised, often to P Audio, but the plans have not been updated with the new details.

P Audio are often the driver of choice in the new Rog designs, apart from specialist Void drivers for the very low end.
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JD01 View Drop Down
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Points: 819 		Post Options Post Options   Thanks (0) Thanks(0)   Quote JD01 Quote  Post ReplyReply Direct Link To This Post Posted: 18 September 2004 at 4:34pm
I hope you let those drivers play for one, two days at mediocre power before you gave 'em the full blast. Those drivers NEED to work a bit to get their final parameters they are speced with. If you power them up for a long time without doing that, the drivers is kinda 'misfit' in the box and it's no wonder they can fry....
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kersley View Drop Down
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Points: 21 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kersley Quote  Post ReplyReply Direct Link To This Post Posted: 29 September 2004 at 11:36pm

Hi.

Thanking you all for the feedback.

After making 3 folded horn bin's I have decided to buy the looney bins.

the only problem is i have the 1850 drivers (8 of them ) where can i get them from ??

i sent emails asking this same question many times.please help

thanks

kersley (kersleyv@ntlworld.com) or kersley2004@aol.com
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Rog View Drop Down
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Points: 2166 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rog Quote  Post ReplyReply Direct Link To This Post Posted: 30 September 2004 at 10:10am

I just don't understand what you are saying.

You say I have 8 PD 1850 drivers, where can I get them from.

Sounds like you have them aready so why are you asking.

Rog.
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loophole View Drop Down
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Points: 469 		Post Options Post Options   Thanks (0) Thanks(0)   Quote loophole Quote  Post ReplyReply Direct Link To This Post Posted: 30 September 2004 at 12:38pm
if you're hoping to sell them, i reckon biotech might be interested
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tb_mike View Drop Down
Old Croc
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Joined: 01 October 2004
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Points: 2744 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tb_mike Quote  Post ReplyReply Direct Link To This Post Posted: 01 October 2004 at 9:08am
Originally posted by kersley kersley wrote:

Hi.


I found that the PD needed much more power to give the same output as the P audio.



even worse the PD 1850 was a cooked after 6 hours of extreme testing.


thanks



Sounds like the Paudio driver is more optimal on that single horn that the PD.
Notice you did say 'extreme' does this involve sinewaves at or below horn cutoff? or-sinewave testing at ABOVE the drivers rms rating for an extended period?

excursion is sealed box level here no horn loading at all.(considering a front loaded horn with sealed rear chamber of the right volume)

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tb_mike View Drop Down
Old Croc
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Joined: 01 October 2004
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Points: 2744 		Post Options Post Options   Thanks (0) Thanks(0)   Quote tb_mike Quote  Post ReplyReply Direct Link To This Post Posted: 01 October 2004 at 9:11am
Originally posted by kersley kersley wrote:

Hi.


loaded it with P audio's 18" LF driver.



Out of interest,what model? they have a huge range of different woofers.

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