Denon 2312 with 4ohm speakers

[efernand1]

Hi All,

11 years I have used different TOP brands of Home Theatres with a variety of speakers which are local or branded and although most of the posts here are true in terms of AVR overheating and not matching due to impedance issues etc...it is advisable to have an AVR outputting the power at the same impedance as the speaker which should be matched well.

Here is a link on amplifiers and their power ratings as on today...I am sure there will be more deeper links available to research further...

AV Receiver and Amplifier Power Ratings Trends: How and Why Wattage Ratings are Manipulated | Audioholics

Hope this helps...

 

[jain1980]

I have also got the MS-100 speaker set which is rated at 4 ohms impedance. Donno much about these technical issues.

What receiver should I get then? A high power receiver or a low power budget receiver? Please help.

 

[jndvm02]

I have a similar question. I have an AVR 2808ci and was looking at getting a set of Magnepan MMG's which are rated at 4 ohms. They support being bi-wired and i was wondering if using the surround back/assignable amp posts to bi-wire with the fronts would be beneficial?

 

[jndvm02]

I have a related question. I have a Denon 2808ci, runs at 110w at 8ohms. I was looking at Magnepan MMG's which run at 4ohms. Both the speakers and the amp can run bi-wire/amp. I was wondering if using the assignable surround back with the fronts in a bi-amp manner would work. If I'm not understanding the concept correctly, please let me know.

 

[jndvm02]

I found this on Denon's forum: 4 Ohm Speakers with A/V Receivers or Power Amps

Though I'm not certain if this is the manufacturer simply saying it can handle without a problem or if they're being forthright.

 

[Vinod.R]

I would run such an AVR with low volume. Just imagine, due to bad luck the AVR gets fried? Then what? Run around for service?

I agree with most FMs here. Just routing the sub frequencies will not work. There is an impedance limit for a reason, the amount of load that an AVR can take safely. It falls to reason that the lower the impedance, the more load there is on an AVR/amp. So a 4 ohms speaker has a higher load than an 8 ohms speaker and so on, provided all other parameters are the same. There is also one more factor in deciding the load to an AVR, that is the sensitivity of a speaker. For example a 91db sensitivity speaker presents an easier load than an 88db speaker, again assuming all other parameters are the same.

To give you an example my AVR Denon 3803 is rated at 110 RMS per channel, 8 Ohms (20-20) all 7 channels driven. My KEFs are rated at 175 RMS at 8 ohms each. An expert from Denon/Pro Fx had told me in clear terms not to exceed -13 decibels on the volume counter so as I do not blow the amp out of the water! I bought this AVR in 2005 and still follow this dictum to this day, thank god everything is going good.

I stand corrected if any of the above information is incorrect.