Currently everyone is gaga over power
handling... i.e... major brand name drivers now claim to handle 500
/1000 plus watts. Problem is the price they paid for that was efficiency. Most of these are around 85 dB sensitivity.
That means they will create an SPL of 85dB with one watt of power.
Since you have to double your power every time you want a 3dB increase
in SPL, it doesn't take long for these high power drivers to be at
their thermal limit. For example there is a 10 inch woofer made by MT?
that handles 400 watts RMS and is 84.5 dB efficient. That means at 400
watts the SPL is at around 110 dB. This of course assumes you have the
money for a good 400 watt amplifier to run it.
Our DHM108B will hit the same 110 dB with
around 100 watts. And at it's thermal limit of 275 watts RMS it is
doing 114 dB. (Enclosure type and cabin gain adds considerable SPL to
the above figures. A pair of these woofers in our wicked one
enclosure won a 1999 Outlaw
SPL contest with an SPL of
161.8 dB with around 500 real watts.)
If all this is new to you, I recommend
reading part of car audio book "Secrets
Car Audio" - it may save
you from making costly and all too common mistakes.
- Steve Deckert,
DECWARE / High Fidelity Engineering Co