Reply to thread

Message

<blockquote data-quote="Ivan Beaver" data-source="post: 137923" data-attributes="member: 30">Re: dB calculationsIt all depends on what your reference is.However the sad thing (I cannot speak on the sub in question as I have no experience with it), about many subs and the &quot;max SPL&quot; spec is that often times it is NOT in the actual intended operating range of the sub (say below 100hz)Since most subs have a louder output at some higher freq (some close to 2KHz), some manufacturers will use this number as their spec for &quot;peak output&quot;.But the actual SPL in the intended range can often be quite lower.So while the manufacturer is not &quot;lying&quot; in terms of SPL output (the sub can produce that SPL at SOME freq)-they are not &quot;telling the truth&quot; as you would expect the product to be producing.THAT is why it is IMPORTANT to be able to see where the actual numbers are coming from/based on etc. You have to be sure to compare apples to apples.Kind of like when Sony first came out with the &quot;pocket radio&quot;.&nbsp; It would not fit in normal sized pockets (like people would expect it to), so the sales men all wore shirts that had LARGER pockets on them, so they could demonstrate how it would fit in a &quot;pocket&quot;.Often what the consumer &quot;thinks they are getting&quot; is different than what they ARE getting-despite the numbers.Oh the power of marketing----------</blockquote>

[QUOTE="Ivan Beaver, post: 137923, member: 30"] Re: dB calculations It all depends on what your reference is. However the sad thing (I cannot speak on the sub in question as I have no experience with it), about many subs and the "max SPL" spec is that often times it is NOT in the actual intended operating range of the sub (say below 100hz) Since most subs have a louder output at some higher freq (some close to 2KHz), some manufacturers will use this number as their spec for "peak output". But the actual SPL in the intended range can often be quite lower. So while the manufacturer is not "lying" in terms of SPL output (the sub can produce that SPL at SOME freq)-they are not "telling the truth" as you would expect the product to be producing. THAT is why it is IMPORTANT to be able to see where the actual numbers are coming from/based on etc. You have to be sure to compare apples to apples. Kind of like when Sony first came out with the "pocket radio". It would not fit in normal sized pockets (like people would expect it to), so the sales men all wore shirts that had LARGER pockets on them, so they could demonstrate how it would fit in a "pocket". Often what the consumer "thinks they are getting" is different than what they ARE getting-despite the numbers. Oh the power of marketing---------- [/QUOTE]

Verification