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4-8 Ohms ?

Cansoman

Cansoman

New Member
Hey everyone,

I just picked up a pair of CV D9s to run along side a pair of Wharfedale Mach 7s. My amp is a Pioneer SA-9500ll. When using both A and B speakers the amp states the speakers should be 8 ohms or more. The Warfs are 8 ohm but the CVs are 4-8 ohms. Is 4 to 8 the range? Are they okay to run with the amp? Thanks.
 
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The cerwin vega speakers should be 4 ohm speakers if i recall correctly. Your amp should run them just fine. they are fairly easy to drive.

I wouldn't run both sets at the same time though if that's what you are asking.
 
Yes, thats what I was asking. The two pairs sound so good together. The CVs say 4-8 ohms on the front of the speaker. Not sure if that means if you can treat them like 4 or 8 ohm, or either?
 
By running the two pairs simultaneously from A and B speaker outs, you are essentially running them in parallel. The impedance would be around 2.5 ohms. Pretty low. I'd run them one set at a time.
 
CV D9’s are actually 6 ohm speakers. They put 4-8 as an average range you can work with. An 8 ohm and a 6 ohm load in parallel should be around a 3 ohm load. Of course they will fluctuate somewhat depending on the speaker and the frequency range you’re working with.


Dennis
 
Without seeing the actual impedance v. frequency curves, you don't really know what the amp will see, but there's a good chance you'll get around 2.5Ω somewhere in the bass, as Sealy said, which is definitely pushing it for the amp.

Running two pairs of speakers at once in any non-engineered setup makes quite a mess of the output anyway. If you find it pleasing, you would probably be better off with either a better high-power high-efficiency speaker than the D9, or a good dipole/omni, depending on what it is about it that you're enjoying.

If you insist, though, get a power amp to run the second pair and run it off a Y-adapter from the pre-out of your pioneer.
 
Thanks everyone. I was reading some reviews on the 9s and others had added another set of speakers along side them for better sound. Im not going to do that if its going to damage the amp.
 
I would say if you are not happy with your speakers as they are to try a different model from the same brand or go with another speaker all together. Its hard enough trying to find gear synergy between an amp or receiver and one set of speakers. I would hate having to do it with 2 different sets of speakers running at the same time.

Just my .02
 
So the mentioned Pioneer amp simply parallels the A & B speakers???
That would be a very low load.
Newer equipment does it differently.
I bet my old (pictured in the avatar) Marantz 4300 did the same. No wonder I had the opportunity to replace it.
 
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Personally, I would go about finding the right amp/receiver for those Mach 7's (For those who don't know, the MACH series was introduced in the early '80's as the replacement for the "E" series ["E" stood for "Efficiency", if I remember correctly]). I think the MACH 7 may have even been the TOTL model in the MACH series. I've heard very-good things about ALL the large-sized Wharfedale models from all the preceding Wharfedale eras, including the "E" line. I'll bet the MACH 7 sold for quite a bit when it was new (The TOTL "E" model went for like $1200 in the late '70's, so you do the math).
 
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Tom Smith said:
So the mentioned Pioneer amp simply parallels the A & B speakers???
That would be a very low load.
Newer equipment does it differently.
I bet my old (pictured in the avatar) Marantz 4300 did the same. No wonder I had the opportunity to replace it.
Click to expand...
I am not aware of any change to the way this is done unless you're talking about 4+ channel amplifiers. Sometimes the A/B switch puts them in series, but normally that's on cheap and low-powered units. Parallel is the norm.
 
The D Series spec sheet I have says Nominal Imped. 8ohm.

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