great replies by all & looks like that helped mental.
one thing I’d like to point out is that the Jade5 is a 6 Ohms speaker (as mentioned in the spec).
So, if it’s 87dB @ 1m for 2.83V then doing the math gives
2.83V^2/6 Ohms = 1.33Watts.
Usually, the industry standard is 2.83V into 8 Ohms & then record the output SPL. With 8 Ohms & 2.83V you get 1W input power.
So, if you want to normalize the Jade5’s sensitivity to 8 Ohms so that you can do an apples-apples comparison with other speakers in the market, we need to do 10*log(1.33W/1W) = 1.24dB & then subtract this from the Jade5’s sensitivity of 87dB. We get 85.76dB = sensitivity of Jade5 normalized to an 8 Ohms speaker.
I DISAGREE with the Jade5 spec in that i disagree that it is a 6 Ohms speaker. I think it’s a 4 Ohms speaker (more about this later on in this post where I reference the Stereophile review & measurements). Keeping this in mind, I would simply subtract 3dB from the spec & say that the Jade5 is 84dB sensitivity normalized to 8 Ohms.
You can take this number & compare it to other 8 Ohms speakers & get a feel for the difference amongst various speakers.
i found a manual to you i-3 SE integrated amp here:
http://www.manualslib.com/manual/576290/Simaudio-Moon-I-3-Se.html?page=11#manual
you can see the output power rating into various speaker loads.
I did some rough calculations & what i’m calculating is that max current at 100W/ch into 8 Ohms is somewhere in the 2.5A region per channel. it is somewhere in the 5A per channel region for 160W/ch into 4 Ohms. Your mighty inefficient Jade5 lie somewhere in between these 2 current numbers.
i also found a stereophile review of your Jade5 here:
http://www.stereophile.com/content/wharfedale-jade-7-loudspeaker-measurements#wXE475EjpBqwa3gf.97
your speaker looks more like a 4 Ohms speaker than a 6 Ohms speaker (like I wrote above). In light of this I’m not 100% sure that your Sim Audio i-3 SE is adequate to drive this speaker to its best ability. i think that the output current is a bit on the low side. I’m sure you’ll get decent sonics from the i-3 SE-Jade5 combination. FWIW.
one thing I’d like to point out is that the Jade5 is a 6 Ohms speaker (as mentioned in the spec).
So, if it’s 87dB @ 1m for 2.83V then doing the math gives
2.83V^2/6 Ohms = 1.33Watts.
Usually, the industry standard is 2.83V into 8 Ohms & then record the output SPL. With 8 Ohms & 2.83V you get 1W input power.
So, if you want to normalize the Jade5’s sensitivity to 8 Ohms so that you can do an apples-apples comparison with other speakers in the market, we need to do 10*log(1.33W/1W) = 1.24dB & then subtract this from the Jade5’s sensitivity of 87dB. We get 85.76dB = sensitivity of Jade5 normalized to an 8 Ohms speaker.
I DISAGREE with the Jade5 spec in that i disagree that it is a 6 Ohms speaker. I think it’s a 4 Ohms speaker (more about this later on in this post where I reference the Stereophile review & measurements). Keeping this in mind, I would simply subtract 3dB from the spec & say that the Jade5 is 84dB sensitivity normalized to 8 Ohms.
You can take this number & compare it to other 8 Ohms speakers & get a feel for the difference amongst various speakers.
i found a manual to you i-3 SE integrated amp here:
http://www.manualslib.com/manual/576290/Simaudio-Moon-I-3-Se.html?page=11#manual
you can see the output power rating into various speaker loads.
I did some rough calculations & what i’m calculating is that max current at 100W/ch into 8 Ohms is somewhere in the 2.5A region per channel. it is somewhere in the 5A per channel region for 160W/ch into 4 Ohms. Your mighty inefficient Jade5 lie somewhere in between these 2 current numbers.
i also found a stereophile review of your Jade5 here:
http://www.stereophile.com/content/wharfedale-jade-7-loudspeaker-measurements#wXE475EjpBqwa3gf.97
your speaker looks more like a 4 Ohms speaker than a 6 Ohms speaker (like I wrote above). In light of this I’m not 100% sure that your Sim Audio i-3 SE is adequate to drive this speaker to its best ability. i think that the output current is a bit on the low side. I’m sure you’ll get decent sonics from the i-3 SE-Jade5 combination. FWIW.