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#304575 - 05/03/10 11:50 AM Re: VP180 [Re: BlueJays1]
htnut
Unregistered


 Originally Posted By: Dr.House
What is the pricing going to be on the VP180 stand?


$240, and you get two stands, presumably one for each end.

forgot to mention pre-order for $200


Edited by htnut (05/03/10 11:51 AM)

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#304584 - 05/03/10 12:47 PM Re: VP180 [Re: JohnK]
michael_d Offline
connoisseur

Registered: 07/23/04
Posts: 3903
Loc: Up yonder
 Originally Posted By: JohnK
Micah, when two speakers are run in parallel the resulting impedance is such that its reciprocal is the sum of the reciprocals of the impedances of the two speakers. Using 6 and 4 ohms, this works out to 1/6+1/4=1/X, 2/12+3/12=1/X, 5/12=1/X, 5X=12, X=2.4ohms.

Keep in mind that the nominal impedance ratings of speakers don't represent their impedance over their entire range(the 4ohm rating on the M80s is a notable example)and that 2.4ohm result would only apply at a frequency where the speaker impedances were in fact 6 and 4 ohms. Also note that a low impedance doesn't necessarily cause a problem if the power used at the low impedance frequency wasn't high enough to require an excessively high current.


John –

What do you think about running the VP180 below the screen and a VP150 above the screen? I’m wondering if that would be a good idea or not. I’m thinking not, but curious nonetheless.
_________________________


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#304589 - 05/03/10 12:56 PM Re: VP180 [Re: michael_d]
alan Online   content
connoisseur

Registered: 01/29/02
Posts: 3187
Loc: Toronto/New York/Dwight
Hi michael_d,

I think not as well, although I did not do listening tests to that combination while I was up at Axiom.

One of my Axiom colleagues, JC (Jean-Claude), has a dedicated home theater room and will try that combo once he has a sample of the VP180. He currently uses two VP150s, one above and one below his projection screen.

Sadly, I don't have room for a VP180 in my apartment. I'll have to think about buying a house so I can accommodate a VP180!

Regards,
Alan
_________________________
Alan Lofft,
Axiom Resident Expert

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#304599 - 05/03/10 01:18 PM Re: VP180 [Re: alan]
davew Offline
buff

Registered: 02/25/08
Posts: 44
Loc: San Jose, CA
 Originally Posted By: alan
Sadly, I don't have room for a VP180 in my apartment. I'll have to think about buying a house so I can accommodate a VP180!


That makes the VP180 really expensive.

-Dave

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#304626 - 05/03/10 02:25 PM Re: VP180 [Re: davew]
SirQuack Offline
shareholder in the making

Registered: 01/29/04
Posts: 13333
Loc: Iowa
side ports might have been an option as well.
_________________________
M80s-VP180-QS8s-EP600-2xEP350 Denon3808 Outlaw7700
M22-OWM22-VP100-Denon2805
Audio Nirvana

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#304642 - 05/03/10 03:42 PM Re: VP180 [Re: alan]
michael_d Offline
connoisseur

Registered: 07/23/04
Posts: 3903
Loc: Up yonder
 Originally Posted By: alan
Hi michael_d,

I think not as well, although I did not do listening tests to that combination while I was up at Axiom.

One of my Axiom colleagues, JC (Jean-Claude), has a dedicated home theater room and will try that combo once he has a sample of the VP180. He currently uses two VP150s, one above and one below his projection screen.

Sadly, I don't have room for a VP180 in my apartment. I'll have to think about buying a house so I can accommodate a VP180!

Regards,
Alan


Please keep me informed after JC has a chance to try this combo.

I am very happy with my current center set up (lower twin M22's) and an upper VP150. I will not give up the upper / lower combination.
_________________________


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#304644 - 05/03/10 03:46 PM Re: VP180 [Re: SirQuack]
dakkon Offline
connoisseur

Registered: 02/08/04
Posts: 1846
The only way you could wire a VP-150 and VP-180 in series using the current hardware is to. Hook up the (+) from the amp to the first speakers (+) and use a jumper from the (-) of the first speaker to the (+) of the second speaker, then plug the (-) wire from the amp to the (-) of the second speaker.


it wouldn't be that complicated, but you would need your power wires to be 2 separate pieces of wire.


I have a EE background.

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#304647 - 05/03/10 04:04 PM Re: VP180 [Re: dakkon]
tomtuttle Offline
axiomite

Registered: 06/20/03
Posts: 8286
Loc: Tacoma
Right - 3 single wires instead of a pair.
_________________________
bibere usque ad hilaritatem

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#304648 - 05/03/10 04:11 PM Re: VP180 [Re: dakkon]
ClubNeon Offline
connoisseur

Registered: 02/06/09
Posts: 3448
Loc: Western Maryland, USA
The serial interaction of the impedance of two complex networks such as speaker systems is bad enough when they have the same curve. Two dissimilar speakers will have very unpredictable (well, very hard to compute) results.

When a cross-over network is being designed for a speaker, the sensitivity of each driver is taken into account, to achieve a linear response when everything is combined. It's fine to wire two fixed resisters in series, you just add up their resistance and the sum is also fixed. But that's not how a loud speaker system works. You'll end up with a non-linear response with areas of higher impedance stacking up higher than the lows.

It's then obvious how much worse it would be with two different speakers interacting with each other.
_________________________
Pioneer VSX-1018AH-K, PDP-5020FD, DV-79AVi
Axiom M22s, VP150, QS8s
Sony PS3, surround backs
-Chris

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#304652 - 05/03/10 04:35 PM Re: VP180 [Re: ClubNeon]
dakkon Offline
connoisseur

Registered: 02/08/04
Posts: 1846
neon, I'm not saying its a "great" idea, just that it "is" possible. and a way to do it without having a sub 2ohm load to the amp....

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