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Infinity speakers

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Determining maximum sound pressure level is easy once you know what your efficiency is including gain of the listening environment. Express amplifier output in dB/W.

If your efficiency c weighted is 102 dB at 1W:

a 1W amp will give you 102dB (wow that was hard!)
a 10W amp will give you 112 dB
a 100 W amp will give you 122dB
a 1000W amp will give you 132dB (providing the speakers can handle this!) The 1kW is good for factoring transient handling, etc. Often we'll go as high as 44dBW in larger systems!

Since dB is equal to the product of ten times the logarithm of the quantity of I over I subzero, it's easy to calculate differing power amounts. A 200WPC amp is 23dBW, for example.

With inefficient speakers (Advent anyone?) of 87dB, the high figures are much lower. This is why you can get away with a nice 30WPC amp on a pair of Klipschorns yet you will need a 300WPC monster to have "big sound" on a pair of Snells.
 
Originally posted by: Cawchy87
Thanks for the link! This install manual looks better than the other ones, more explination!
Click to expand...

installdr is awesome. The speakers will be harder to do than the deck.
 
Assuming sensitivity is the same thing as efficiency 😕

Originally posted by: sharkeeper
Determining maximum sound pressure level is easy once you know what your efficiency is including gain of the listening environment. Express amplifier output in dB/W.

If your efficiency c weighted is 102 dB at 1W:

a 1W amp will give you 102dB (wow that was hard!)
a 10W amp will give you 112 dB
a 100 W amp will give you 122dB
a 1000W amp will give you 132dB (providing the speakers can handle this!) The 1kW is good for factoring transient handling, etc. Often we'll go as high as 44dBW in larger systems!

Since dB is equal to the product of ten times the logarithm of the quantity of I over I subzero, it's easy to calculate differing power amounts. A 200WPC amp is 23dBW, for example.

With inefficient speakers (Advent anyone?) of 87dB, the high figures are much lower. This is why you can get away with a nice 30WPC amp on a pair of Klipschorns yet you will need a 300WPC monster to have "big sound" on a pair of Snells.
Click to expand...

Hmmmm. So if the Sensitivity is 92dB...

A 1watt amp will give 92dB
A 10watt amp will give 102dB
A 20watt amp will give 104dB
(Max for my head unit) A 26watt amp will give 105dB? (my calculations show 135.2 which is clearly wrong)

Considering an orchistra gives out 98dB and a walkman on max gives out 100dB I am sure this would be fine assuming my calculations are correct.
 
Originally posted by: Cawchy87
Assuming sensitivity is the same thing as efficiency 😕

Originally posted by: sharkeeper
Determining maximum sound pressure level is easy once you know what your efficiency is including gain of the listening environment. Express amplifier output in dB/W.

If your efficiency c weighted is 102 dB at 1W:

a 1W amp will give you 102dB (wow that was hard!)
a 10W amp will give you 112 dB
a 100 W amp will give you 122dB
a 1000W amp will give you 132dB (providing the speakers can handle this!) The 1kW is good for factoring transient handling, etc. Often we'll go as high as 44dBW in larger systems!

Since dB is equal to the product of ten times the logarithm of the quantity of I over I subzero, it's easy to calculate differing power amounts. A 200WPC amp is 23dBW, for example.

With inefficient speakers (Advent anyone?) of 87dB, the high figures are much lower. This is why you can get away with a nice 30WPC amp on a pair of Klipschorns yet you will need a 300WPC monster to have "big sound" on a pair of Snells.
Click to expand...

Hmmmm. So if the Sensitivity is 92dB...

A 1watt amp will give 92dB
A 10watt amp will give 102dB
A 20watt amp will give 104dB
(Max for my head unit) A 26watt amp will give 105dB? (my calculations show 135.2 which is clearly wrong)

Considering an orchistra gives out 98dB and a walkman on max gives out 100dB I am sure this would be fine assuming my calculations are correct.
Click to expand...
Unfortunately, an orchestra can deliver over 115dB in the front row, but you don't need to worry about that.
 
Just remember in a car you have 90dB noise floor! You can never get the dynamic range of an orchestra in your car. POP3 music is ok because it has a crest factor of 15 dB.
 
Originally posted by: sharkeeper
Just remember in a car you have 90dB noise floor! You can never get the dynamic range of an orchestra in your car. POP3 music is ok because it has a crest factor of 15 dB.
Click to expand...

Your speaking jazz buddy 😛 . So... these speakers will be plenty loud?
 
Originally posted by: ribbon13
Great thing about cars is you have so much gain. Much easier to achieve 160db in a car than a house.
Click to expand...

I don't think I would want to... At that level I wouldnt' be able to enjoy the music even.

Also, over 80 posts a day is AMAZING! Not sure if it's good or bad, but it is quite the feat to keep up for a few months.
 
Great thing about cars is you have so much gain. Much easier to achieve 160db in a car than a house.
Click to expand...

But no quality at all.

I like to feel the waves pass by me and exit the room. Like waves at sea passing by. Truly orgasmic material.

In a car the air is compressed - you're sitting inside a speaker box! That is horrible.

Even at 160dB, you're only realising 60dB dynamic range. In the studio one can realise 90+ easy. 120+ with an esoteric setup. 🙂
 
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