 Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: Apr 2007
Posts: 4,877
connoisseur
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connoisseur
Joined: Apr 2007
Posts: 4,877 |
The additional driver and larger amplifier power output let us bring the EP800's SPL up to 114 dB anechoic and 125 dB SPL in a room.  !
-David
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Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: May 2003
Posts: 18,044
shareholder in the making
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shareholder in the making
Joined: May 2003
Posts: 18,044 |
Eh, I think you need to go for the theoretical physical limit of loudness. Kick it up a notch!
I am the Doctor, and THIS... is my SPOON!
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Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: Dec 2007
Posts: 7,786
axiomite
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axiomite
Joined: Dec 2007
Posts: 7,786 |
The main advantage of a sealed subwoofer like the EP800 is that you can extend the deep bass response down to frequencies like 12 or 13 Hz without having to deal with issues of audible port noise. From what I understand you could also increase cabinet and port size, but then you end up with a monster that only it mother, or confirmed bachelors could love.  The "punch" that some listeners attribute to some subwoofers is simply a non-linearity Alan. How does that non-linearity show up in measurements. Would you start to see greater than expected distortion?
Fred
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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
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Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: Dec 2007
Posts: 7,786
axiomite
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axiomite
Joined: Dec 2007
Posts: 7,786 |
Well that put's it in perspective quite nicely, but aren't we then talking about spending nearly $5k to run 2 ep800s? Yikes! I truly am leaving my senses! Sad as it sounds, I had the same reaction to buying a single EP350 initially. I had a hard time getting my head around the idea of paying 1/2 again the price of my mains just for one more speaker. Now that I am enjoying a little 'subbage' with my movies, I see things a little differently. I do have to admit that 5k for good bass still seems a little much for me.
Fred
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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
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Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: Nov 2007
Posts: 868
aficionado
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aficionado
Joined: Nov 2007
Posts: 868 |
Indeed Fred, I felt the same way except my EP500 cost more than my mains M22s, But a good sub adds so much even with towers.
Dave
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Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: Sep 2004
Posts: 11,458
shareholder in the making
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shareholder in the making
Joined: Sep 2004
Posts: 11,458 |
I'd challenge anyone to consistently and reliably pick out a sealed or ported subwoofer in a double-blind controlled test.
OK, Alan.... I'm completely neutral on this, so I'd make a good juror. Send me both, and I'll do exhaustive tests over a few years and report back!
::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::
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Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: May 2003
Posts: 18,044
shareholder in the making
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shareholder in the making
Joined: May 2003
Posts: 18,044 |
My ported subwoofer is far superior to my old sealed subwoofer, so I think Alan's wrong.  Of course, my ported subwoofer is an EP350v3 (300 watt amp, 12" woofer), and my old sealed subwoofer was a Cambridge Soundworks Powered Subwoofer 1 (120 watt amp, 12" woofer).
I am the Doctor, and THIS... is my SPOON!
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Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: Jan 2002
Posts: 3,270
connoisseur
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connoisseur
Joined: Jan 2002
Posts: 3,270 |
Hi Fred,
If you graphed the frequency response, the non-linearity should show up as a gently rounded hump in the frequency response, likely starting around 100 Hz and reaching a peak that's perhaps 6 dB to 10 dB higher at 60 Hz, then gradually rolling off as you get to lower frequencies.
There might be increased harmonic distortion, but the reality is low-bass distortion is really hard to detect with music or effects until it rises to huge levels.
Regards,
Alan Lofft,
Axiom Resident Expert (Retired)
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Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: Feb 2008
Posts: 1,898
connoisseur
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connoisseur
Joined: Feb 2008
Posts: 1,898 |
Alan - thanks as always for the informative response. The more I hear about the 800, the more I like it. Please release it to the masses!  Jason
Epic 80-800: HG Cherry
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Re: Subwoofer design, ported vs closed, ep600 vs ep800
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Joined: Apr 2007
Posts: 4,877
connoisseur
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connoisseur
Joined: Apr 2007
Posts: 4,877 |
or at least feed us some more info! can we have a release date by quarter? by year? something!
-David
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