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#356980 - 10/18/11 09:32 PM Re: Sneak Peak: VP160 Prototype [Re: Sarang]
JohnK Offline
shareholder in the making

Registered: 05/11/02
Posts: 10307
Sarang, Ian pointed out the major reason why subs, for the most part, don't make use of non-parallel sides for the enclosure. The small "room" that the inside of the enclosure forms follows the same room mode rules as do our listening rooms. If the modes that would exist in that "room" are well above the frequencies that the sub actually plays, then reducing or spreading them out wouldn't be of benefit. For example, calculate the modes for a room say 1.2'x1.5'x1.8', or more conveniently, use a calculator such as this one . Note that the resulting standing waves inside the subwoofer "room" are all in the mid-range and far above what frequencies are actually played.
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#356982 - 10/18/11 10:29 PM Re: Sneak Peak: VP160 Prototype [Re: JohnK]
BlueJays1 Offline
connoisseur

Registered: 09/19/08
Posts: 4059
Loc: Porch,enjoying Bombay Sapphire
For loudspeakers though you would want to avoid resonance frequencies in the mid-range at the very least. For subwoofers though how can it be a bad thing to raise the resonant frequency?

That said some of the best possible performing loudspeakers like the Revel Salon 2 have very, very inert cabinets, on the opposite spectrum, the Infinity Primus are basically hallow cabinets but still offer very good performance. Controlling cabinet resonance I think would depend on a lot of factors and not one that is a matter of being absolute. Its like a lot of tradeoffs in loudspeaker design.
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#356993 - 10/19/11 01:27 AM Re: Sneak Peak: VP160 Prototype [Re: BlueJays1]
SBrown Offline
aficionado

Registered: 11/16/10
Posts: 804
Loc: Victoria,BC
That is awesome, I want one! When do you think it will be available Ian?

That really dwarfs the 150, which will work out great using the 160 above the TV screen and 150 below, can't wait!
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#356996 - 10/19/11 02:55 AM Re: Sneak Peak: VP160 Prototype [Re: BlueJays1]
Ian Offline
President
aficionado

Registered: 03/13/01
Posts: 772
BlueJays1,

The points you are making are exactly what I am going to cover in my upcoming newsletter piece on bracing. It seems like it is going to be a very timely article given the current discussion.
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#357034 - 10/19/11 09:44 AM Re: Sneak Peak: VP160 Prototype [Re: JohnK]
Murph Offline
axiomite

Registered: 10/05/06
Posts: 6614
Loc: PEI, Canada
Originally Posted By: JohnK
Sarang, Ian pointed out the major reason why subs, for the most part, don't make use of non-parallel sides for the enclosure.


Hey, I explained it first. Ian just didn't use the Bran Muffin analogy. I guess I lost points for not being staff or not being the slightest bit eloquent.

Ian is, admittedly, much more knowledgeable than I and he has Shania Twain's Summer Home on the other side of his lake. I can't compete with that.
I humbly concede.
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#357035 - 10/19/11 09:45 AM Re: Sneak Peak: VP160 Prototype [Re: Ian]
BlueJays1 Offline
connoisseur

Registered: 09/19/08
Posts: 4059
Loc: Porch,enjoying Bombay Sapphire
Here is an AES publication on this very topic. JohnK probably already has it in his collection smile .

http://www.aes.org/e-lib/browse.cfm?elib=5163
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#357065 - 10/19/11 05:27 PM Re: Sneak Peak: VP160 Prototype [Re: Amie]
michael_d Offline
connoisseur

Registered: 07/23/04
Posts: 3822
Loc: Up yonder
Originally Posted By: Amie
I'm just the picture transfer girl today, Mark - I'll leave it for the boys to weigh in with measurements (but not likely until tomorrow because everyone is in transit somewhere today it seems!)

Next pic with the VP180 is ready:



Oh yeah....now we're talking! Much mo betta..
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#357093 - 10/20/11 01:07 AM Re: Sneak Peak: VP160 Prototype [Re: michael_d]
jakewash Offline
shareholder in the making

Registered: 12/26/03
Posts: 10394
Loc: Calgary, Alberta
Loving it, I can't wait to get a chance to hear/buy this speaker.
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#357975 - 11/03/11 11:24 AM Re: Sneak Peak: VP160 Prototype [Re: jakewash]
DSR7997 Offline
newbie

Registered: 01/25/11
Posts: 3
Loc: Houston, Tx
All of a sudden My wife Tina is getting agitated and she doesn't even know why. She must feel the "disturbance in the force". Looks real good so far!

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#359223 - 11/23/11 11:00 PM Re: Sneak Peak: VP160 Prototype [Re: DSR7997]
jakewash Offline
shareholder in the making

Registered: 12/26/03
Posts: 10394
Loc: Calgary, Alberta
Still waiting patiently for more on this, hoping it will be ready for purchasing soon; Santa could use one.
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Jason
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My HT

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