injured & need help w/ spkr/rcvr compatability

P

Paulie

Audiophyte
Hello,

First some backround- I was seriously injured may 9th of this year after being hit by a sleeping driver's car and have been out of the hospital only a month. I was paralyzed waist down in the incident, and my father who was with me lost his whole right leg. I've got limited recources for rides (to the hi-fi store) and cannot move heavy items (i.e. speakers) myself due to a broken backbone still healing.

I purchased a Marantz SR 4320 STEREO reciever yesterday, rated at 80w. My other considerations were the Onkyo TX8511 and Denon DRA 395 and 685. I needed something with the ability to control the unit via an extensive remote (I'm often bedridden now) and with the ability to run some AV items through it as well as my phonograph, ipod and computer. My budget was $300-$500.

I feel I may have bought the wrong receiver in haste- here's the issue...

I'll be running JBL 60w bookshelf speakers for now, and later either or both a pair of vintage panasonics and HED Cerwin Vegas (both mid-70's to early 80's). I checked the panasonics today and they have a 6 ohm rating, are 100w, The cerwin vegas I think listed at 100w or higher but no ohm rating (I've seen similiar rated as a range of "from 4 to 8 ohms"). My receiver states use min. 8 ohms for speakers. Is this Marantz going to fry on me? The other brands(Onkyo and Denon) are either 80w or 100w each and claim they can easily handle speakers down to 4 ohms. Is Marantz being extra cautious or is it missing a key interior component that will allow this receiver to cook itself? Hindsight I should have checked before buying, but I had limited time to shop and get a ride back home. I've got a few days to return it (my next and only ride is this sunday. Should I return it for the Onkyo or Denon that state they can run down to 4 ohms? I really like the features and number of imputs of this receiver and it's control via the remote but it won't do me any good if I bake it. Thanks in advance for any/all help. Oh, and if this matters, I ran a vintage Technics and vintage Pioneer Receiver to power these before, but they have no remote and are in storeage now, so i'm unable to check what power/ohm ratings they claimed to push. I never had either above half way volume, ever. It was deafening...
 
Shinerman

Shinerman

Senior Audioholic
Well first, sorry to hear about your accident. That's rough but it sounds like your moving on.

You will be fine with the Marantz. I have not seen any of the 20 series models yet but prior models were good receivers. Don't worry another second about it.

Shinerman.
 
R

rectifier

Audiophyte
To an ohmmeter set to measure DC resistance an "8 ohm" speaker will measure around 6.5 ohms. A "4 ohm" speaker will measure around 3.5 ohms. So you can measure for yourself (basic digital multimeters are very cheap these days). Loudspeaker impedance (resistance to AC) ratings are nominal figures which actually vary slightly with frequency. Strictly-speaking the Panasonics are too low-impedance but as hawke and Shinerman say it'll be OK, perhaps with trouble only at sustained high volumes. However, if you were to connect the Panasonics and CVs at the same time the amp will "see" them in parallel, which reduces the load impedance on the amplifier. That could get interesting...
 

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