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Pi Theater Four and B&C compression drivers [message #52106]

Sat, 10 May 2008 04:59

peppennino
Messages: 40
Registered: May 2009

Baron

Hi Wayne! I have the intention to switch to B&C DE250 on my Th4 and use the PSD 2002 for rear channel speakers. In that speaker, wich are the most important differences between the Eminence and B&C drivers? What I have to change on Xovers?

Many thanks in advance,
Vincenzo

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Re: Pi Theater Four and B&C compression drivers [message #52107 is a reply to message #52106]

Sat, 10 May 2008 11:21

Wayne Parham
Messages: 18710
Registered: January 2001

Illuminati (33rd Degree)

The DE250 is a little smoother and a little louder. The crossover is a little different as a result. You'll need to change the value of R1 from 16Ω to 25Ω.

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Re: Pi Theater Four and B&C compression drivers [message #52108 is a reply to message #52107]

Sun, 11 May 2008 04:38

peppennino
Messages: 40
Registered: May 2009

Baron

Many thanks, Wayne! What about F.R. with the Eminence horn? Is it more extended on the top?

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Re: Pi Theater Four and B&C compression drivers [message #52109 is a reply to message #52108]

Mon, 12 May 2008 13:06

Wayne Parham
Messages: 18710
Registered: January 2001

Illuminati (33rd Degree)

There is a little bit more on the top end and it's a little smoother too. As you can see from the response curve below, the PSD2002 has +/- 2dB ripple and the DE250 is more like +/- 1.5dB. The signal is unequalized, so don't be concerned by the overall falling response. This is normal for a compression driver and is easy to compensate in the crossover.