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#299749 - 03/31/10 07:14 PM Center channel VP-150 impedance
gulf979cb Offline
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Registered: 09/15/09
Posts: 13
Hi all...
Just a quick question that i'm sure someone has an answer for.
I currently have the awesome Axiom M22v2 speakers powered by a newer Pioneer receiver at 8-ohms.
I am interested in buying a Center VP-150v2 but i noticed that it is rated at 6-ohms?? Is this correct and if yes what if any damage can i do running different rated speakers by this receiver.
I have the capability of running the speakers at either 6 or 8 ohms from the receiver. All speakers i currently have are 8-ohm speakers. Can i run the VP-150 at 8 ohms?

oh-toil and trouble... what to do...what to do??

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#299750 - 03/31/10 07:17 PM Re: Center channel VP-150 impedance [Re: gulf979cb]
RickF Offline
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Registered: 02/26/05
Posts: 5210
Loc: Vero Beach, Florida
Yep, it's rated @ 6 ohms and no you won't have any problems.

I'm running 8 and 6 ohm speakers through my AVR, and have been doing so for quite a long time without any problems whatsoever ... as long as you have the AVR setting to 8 ohm you'll be fine.
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Rick
Our Room

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#299751 - 03/31/10 07:21 PM Re: Center channel VP-150 impedance [Re: RickF]
gulf979cb Offline
frequent flier

Registered: 09/15/09
Posts: 13
Will i notice a performance difference running this speaker at 8 ohms instead of the rated 6?
Are there limitations to running it at a higher impedance then recommended?
The receiver will have no harm done to it by running this 6 ohm speaker and the other 8 0hms together?

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#299752 - 03/31/10 07:25 PM Re: Center channel VP-150 impedance [Re: gulf979cb]
RickF Offline
axiomite

Registered: 02/26/05
Posts: 5210
Loc: Vero Beach, Florida
Nope.

I run an 8ohm VP100 and a 6ohm VP150 wired in parallel and have not had any issues at all. You'll be perfectly fine.
_________________________
Rick
Our Room

smile

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#299753 - 03/31/10 07:35 PM Re: Center channel VP-150 impedance [Re: RickF]
gulf979cb Offline
frequent flier

Registered: 09/15/09
Posts: 13
What is your receiver set to?? 6 or 8 ohms?
I just searched the manual for my Receiver which is a
Pioneer VSX-1018AH-K and it says it recommends using 8 ohm speakers and if you want to run 6 ohm you have to set the receiver to 6 ohms.

I trust your advice RickF...no offense -- but i would love to hear from more people before i place my order.

The VP-150 is a very efficient speaker and if i run it at a 8 ohms instead of 6 will this affect the characteristics of this speaker?

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#299754 - 03/31/10 07:44 PM Re: Center channel VP-150 impedance [Re: gulf979cb]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6789
Loc: The Peoples Republic of Il.

Rick is correct, leave it set to 8 ohm.
_________________________
Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud


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#299759 - 03/31/10 07:57 PM Re: Center channel VP-150 impedance [Re: Wid]
gulf979cb Offline
frequent flier

Registered: 09/15/09
Posts: 13
I am reading various things on different forums about setting the receiver to 6 ohms and driving all speakers with that..including the 8 ohms i already have?? thoughts on that? perhaps an Axiom engineer can chime in and give me an official answer as to what to do.
I don't want to cause harm to my wonderful Axiom speakers i already have ....or my receiver for that matter.

why is this particular speaker rated at 6 ohms? Is it due to the number of drivers in each one??

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#299760 - 03/31/10 08:03 PM Re: Center channel VP-150 impedance [Re: gulf979cb]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6789
Loc: The Peoples Republic of Il.

You will not harm speaker nor receiver. The very worst thing that can happen is the receiver will shut down, but it shouldn't.

From an article at Audioholics.:

"Impedance Selector Switches
This so called feature, used by some manufacturers, is designed to prevent overheating of the receiver or damage to its output transistors because of excessive current flow. The manufacturer accomplishes this in one of 2 ways: 1) Stepping down rail voltage supplied to the power amp or 2) feeding half the signal strength to a voltage divider of power resistors. Both of these methods severely limit dynamics and current capability of the power amp. This results in an audible decrease in bass capability and dynamics transient sound because the 4 ohm setting effectively increases the receiver's output impedance. Unfortunately many manufacturers put these features on their products to ease customer concerns with driving low impedance loads and for safety reasons when getting UL approvals. Note: In order to meet UL requirements, a receiver cannot be rated down to 4 ohms without having this switch onboard. Receivers without this switch are usually rated down to 6 ohms. In most cases, well designed receivers can easily handle 4 ohm loads safely and efficiently. It is highly recommend to keep the impedance switch set to 8 ohms regardless of your speakers impedance and make sure your receiver has plenty of ventilation."
_________________________
Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud


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#299764 - 03/31/10 08:08 PM Re: Center channel VP-150 impedance [Re: Wid]
gulf979cb Offline
frequent flier

Registered: 09/15/09
Posts: 13
See....it's the word "shouldn't" that causes me great distress.

I don't have an unlimited amount of money to just try things out and see what happens. "IF" i have a problem then what do i do?? Other then perhaps sell my stuff to some of you fine people??

Unless i get an "official" answer from an Axiom tech rep...i might have to shop somewhere else for an 8 ohm rated quality center speaker. Not a threat at all...just very worried....

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#299768 - 03/31/10 08:14 PM Re: Center channel VP-150 impedance [Re: gulf979cb]
Wid Offline
axiomite

Registered: 06/22/03
Posts: 6789
Loc: The Peoples Republic of Il.

If you are worried about your receiver and the VP 150 you should take a look at the M22s impedance curve. It dips down to 3 ohm in the 4KHZ range. I'm telling ya you will be fine running the 150 with that Pioneer.
_________________________
Rick


"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud


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