Ohm Speaker
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 DC Gold 7 Reference Series Speaker N7R BLACK 8 OHM  US $405.88
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 2 JL AUDIO 12W3V3 4 NEW 12 SUBS 4 OHM 500W SUBWOOFERS US $399.99
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 2 JL AUDIO 10W3V3 2 SUBS NEW 10 SUBWOOFERS 10W3 2 OHM US $399.99
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Audio Av Receiver Electric Power Qualifications
Many simply relate loudness with amplifier power but few realize that the sound they hear is not just a function of the amplifier output power and the audio source, but also of the home theater speakers, and the room environment.
In other words, while amplifier power is the driving force behind your home theater speakers, the resultant sound you hear depends also on both speaker efficiency and your home theater room.
Audio Amplifier Basics
Before delving into how amplifier power, speaker efficiency and room environment influence the resultant sound quality and loudness, it is important to first have a better understanding of a few amplifier basics.
A very basic concept here is that no matter how one specifies power, as long as all other things are equal, having more amplifier power is better. The idea can make your system participate in even louder, seems much better, and fewer prone to lead to presenter inability on account of delivering the actual av receiver directly into clipping with your efforts to acquire far more energy from the underrated home theater amplifier or perhaps Audio-video phone.
This does not mean that you should go out and get the biggest amplifier you can afford. The power rating of your amplifier should be related to your speakers. Inasmuch as an audio amplifier with insufficient power can hurt your speakers, too much amplifier power may also lead to both thermal failure and mechanical failure.
So... how much av receiver power do you need?
In general, audio amplifier power needs to be larger than the speakers' rated power because an amplifier is capable of delivering its rated power only when driven by a sinusoidal, or sine wave signal.
As a general guideline, many professionals would advise to allow for a 30%, even 50% increase in amplifier power over the rated speakers' average, or 'RMS' power. Thus if your speakers are rated at 100W, the amplifier should be capable of delivering close to 150W when rated for a sine wave signal.
But there is more to audio amplifier power than allowing for the fact that amplifier ratings are based using a sine wave signal - which in itself is a far cry from what you will be throwing at it.
As we have stated in our introduction, both speaker efficiency and your room environment - in particular the room size - play a critical role in determining the actual amplifier power you need to achieve your desired level of loudness. Presenter proficiency is often a measure of any speaker's audio productivity inside decibels, tested at one particular meter clear of the presenter while give simply by 1 watt regarding energy (2.83 volts into an 8 Ohm speaker load) in a non-echoing test environment.
In practical terms...
For the typical average room, 50W average power per channel should generally be more than sufficient if your speakers have average efficiency and you have average listening habits; this amount will have to be doubled and even tripled in the case of a large room.
At the same time, keep in mind that your volume level is also a function of the source signal; not all system components outputs are set at the same level - so for the same audio amplifier setting, some audio sources may not sound as loud as others. Having enough amplifier power reserve will enable you to match the audio amplifier output to your desired listening level even with low level output system components.
Whatever is the case, always remember that having more power is better than insufficient power and that sufficient amplifier power is key to both a more enjoyable listening experience and a sure way to help protect your expensive audio gear.
Related website : www.amplifierhomeaudio.com/home-audio-amplifiers.html | Rachel Ryan's Stay Home System | Public Speaking Home Study Audio Course
What ohm speaker would go best with a infinity amp 611a 1800w manual?
Well it depends on how much power you want to get out of the amp. For instance, this amp offers 456watts rms @ 4ohms and 657watts rms @ 2ohms. So, would you like a 450watt sub or a 650 watts sub? If you are planning on hooking up one sub, here's what you do.
450watt sub: you will get a dual voice coil(DVC) 2ohm sub and wire it this way:
http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/1DVC_2-ohm_mono.jpg
For the more powerfull 650watt sub & to get the most out of your amp, Here's what you do, get a DVC 4ohm sub around 650watts rms and wire it this way
http://a248.e.akamai.net/pix.crutchfield.com/ca/learningcenter/car/subwoofer_wiring/1DVC_4-ohm_mono.jpg
comparing 8 Ohm speakers
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