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DEQX pdc 2.6p
DEQX pdc 2.6p
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Old 14th February 2009, 12:28 PM   #1
exurbia is offline exurbia  Australia
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Join Date: Jul 2002
Location: Perth
Question DEQX pdc 2.6p

Are there many users of this wonderful device on DIY ?

I have had mine for just on a year now, but have only started using it since december. I had to build the speakers and get the amps out of storage to do so.

After living with it for two months i took it out of the system and reinstalled the passive x/o's and pre amp (proceed pre).
This was to judge the difference, i have found that my speakers which were fabulous now sound like crud. We will go back to the DEQX and active speakers.
I have only one real issue with the pdc and that is lack of inputs the poor ergonomics don't help either.

Any opinions or questions are invited.
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Old 14th February 2009, 07:22 PM   #2
Sheldon is offline Sheldon  United States
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Join Date: Dec 2003
Location: San Diego
It's an excellent tool. It's easy to get started and get very good results. This is especially true with common box type speakers. It requires some trial and error to incorporate other designs, such as dipoles, and other speakers that generate lots of reflections or have complex polar patterns. Have to learn when to intervene and when not to. In general, fix peaks but leave dips alone.

Try measuring your passive system and see what it looks like.

Would be nice if it had a couple more switchable inputs.

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Old 14th February 2009, 10:51 PM   #3
exurbia is offline exurbia  Australia
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Hi Sheldon,
So, you have one as well. My passives were measured using LMS and they are nice and flat, I used LEAP to design them and the X/O.
I think the biggest difference is in the correction filter applied by the DEQX. The room correction is also a huge boon if like me you have a front room that measures 5.5x6 metres.
My speakers use an ATC 9" woofer, Morel 3" MDM75 dome and a Morel MDT 30s dome. The passive X/O is 3rd and 4th order linear phase.
Running through the DEQX i x/o at 600 and 5500 48dB on the lower and 48dB dB on the top.
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