Questions on how to set up Wharfedale Jade Series speakers - AVS Forum
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post #1 of 10 Old 07-21-2013, 12:15 AM - Thread Starter
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Hi folks, I have just acquired some Jade 7’s towers, C2 center, and SR’s surrounds. I have not set up the system as of yet, but have a few questions before doing so. Bass will be handled by an SVS subwoofer. On the Manual, it states to set the 7’s to large? Isn’t this contrary to what most believe that all speakers should be set to Small, when running a separate subwoofer in a 5.1 configuration? The sound processor will be a Denon 4311 and power will come from an Emotiva XPA-5. This amplifier puts out 200 watts x 5 channels into 8 ohms, and 300 watts per channel into 4 ohms. Since the Jade’s are rated at 6 ohms, is it best to configure them at a 4 ohm impedance, versus 8? Below are a few measurements from some professional reviews, demonstrating that some of the Jade's dip below 4 ohms. Also, the C2 center channel is supposed to be of an aperiodic bass loading, which is Wharfedale's design to combine the benefits of a sealed and vented enclosure. However, the C2 comes with two removable port plugs in the rear. Other manufacturers send these port plugs to either run the speakers in sealed mode or to remove them to run in a ported enclosure mode. What gives with the C2? Should I leave these on?

http://www.stereophile.com/content/wharfedale-jade-7-loudspeaker-measurements

http://www.hometheater.com/content/wharfedale-jade-7-speaker-system-ht-labs-measures
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post #2 of 10 Old 07-21-2013, 12:24 AM
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The plugs will be made out of open cell foam, that is what makes the cabinet aperiodic. Do not remove them, Wharfedale should not have even made it possible to do so...

Those speakers are most definitely 4 ohm, regardless of the manufacturers rating. I would still set them to small, but you can play with a crossover lower then 80hz.

Nice speakers! One of the most well engineered, reasonably priced, very high end sets of speakers around.
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post #3 of 10 Old 07-21-2013, 12:39 AM - Thread Starter
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^^^ Jay, with the Jade 7 towers, the Aperiodic design is really well engineered. You can feel the foam at the bottom, but it is non-removable. There are some small slots in the base of the speaker as well. However, for the C2 center, there are two conventional ports in the back with the two "removable" foam plugs. These are the type of plugs that are included with some speakers from other manufacturers where you can run them either in sealed or ported mode. You are correct, since the C2 is designed with the Aperiodic loading, they should have not designed it with the removable port plugs.
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post #4 of 10 Old 07-21-2013, 12:57 AM
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Nice speakers! It won't matter what you set the impedance to in the receiver because you are using a separate amp. Just set them to small. This will give both the speakers and amp an easier workload and you won't miss out on anything since the beastly svs will be handling the lows anyway

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post #5 of 10 Old 07-21-2013, 01:06 AM - Thread Starter
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Thanks Danny. So there is no way to set the impedance in the Emotiva XPA-5 for the speakers?
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post #6 of 10 Old 07-21-2013, 01:19 AM
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The amp automatically reacts to the speakers load. Dont worry about it, just hook it up already smile.gif
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post #7 of 10 Old 07-21-2013, 01:33 AM - Thread Starter
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Quote:
Originally Posted by Jay1 View Post

The amp automatically reacts to the speakers load. Dont worry about it, just hook it up already smile.gif

I am having an installer coming in for installation/programming. So if the Emotiva automatically detects impedance, then there is not need to set impedance in the Denon 4311, when used as a processor, versus power source?
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post #8 of 10 Old 07-21-2013, 01:35 AM - Thread Starter
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Jay, have you ever seen the Jade's in person? Still curious about those two foam plug ports in the rear of the C2? They look odd, just kind of sticking out from the back.
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post #9 of 10 Old 07-21-2013, 01:48 AM
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Unfortunately I have not, just an admirer of the design.
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post #10 of 10 Old 07-22-2013, 12:07 PM
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Here's the impedance plot for your speakers:



It dips below 4 ohms (3.2ohms) in a very small part of the spectrum. This isn't out of the ordinary. Its nothing to worry about if you have a separate amp. The Emotiva will handle those speakers without a problem.

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