I figured since this is a forum I would expand a bit on why 8 small audiophile quality woofers are far better & louder than the 2 woofer/2 passive system of the early 80's or even 2 large 8" woofers. If you have an A5, you owe it to yourself to try to do this. I turned this impressive looking but whimpy sounding pig into a powerhouse without touching anything but the woofers & their wiring & replaced the electrolytic with an equal poly-film cap. Same 4.7uF but a smoother response compared to the brassy sound of electrolytics & you can hear it in the sound too, quite plainly. The rest of my time was spent coping with the power that was pounding the poor cabinets into the dust...
Basically the 4 woofers working in unison are like a 9" diameter woofer with an impossibly light & efficient diaphragm/suspension, a 10lb extremely strong magnet & a 4" voice coil that can also go easily from 40Hz to 10000Hz & have a 94db sensitivity rating....Also, it's good to remember that the sensitivity of smaller speakers is higher across a larger range than large woofers too.
That is quite the impressive set of factors about arrays that make them flat out more powerful, more efficient & with cleaner transient response than large single woofer speakers. Plus, in this case, the speakers themselves are about 9db more efficient than the old paper cones & adding 2 more woofers while elminating the passives again boosts efficiency by at least 6-10db depending on the weight of the passives. So I think it would be safe to say, that watt for watt, the new woofers boost output in general, by about 15db over the very inefficient woofer/passive system.
Believe it or not, google that if you want but a 15db increase in acoustic output is equal to 32 times the amplifier power since our hearing is logarithmic.
To my ears, this set feels under-rated & the coupling effect & high, high efficiency of small speakers is the reason why it sounds HUGE!!! Conion killing huge......& wayyyyy more BASSSSSSS!!!
Cpl
Basically the 4 woofers working in unison are like a 9" diameter woofer with an impossibly light & efficient diaphragm/suspension, a 10lb extremely strong magnet & a 4" voice coil that can also go easily from 40Hz to 10000Hz & have a 94db sensitivity rating....Also, it's good to remember that the sensitivity of smaller speakers is higher across a larger range than large woofers too.
That is quite the impressive set of factors about arrays that make them flat out more powerful, more efficient & with cleaner transient response than large single woofer speakers. Plus, in this case, the speakers themselves are about 9db more efficient than the old paper cones & adding 2 more woofers while elminating the passives again boosts efficiency by at least 6-10db depending on the weight of the passives. So I think it would be safe to say, that watt for watt, the new woofers boost output in general, by about 15db over the very inefficient woofer/passive system.
Believe it or not, google that if you want but a 15db increase in acoustic output is equal to 32 times the amplifier power since our hearing is logarithmic.
To my ears, this set feels under-rated & the coupling effect & high, high efficiency of small speakers is the reason why it sounds HUGE!!! Conion killing huge......& wayyyyy more BASSSSSSS!!!
Cpl
That same speaker in a mid Boombox sized cabinet was all mids and highs.
These cabinets are very directional & room placement matters more with this type of radio. The speakers didn't change the characteristics of the cabinets but in my opinion, the new woofers overcame many deficiencies that the old woofers had & it's quite a powerhouse now with decent bass & deeper roll-off(f3) by far...probably down to 40-50hz depending on room-size, etc....
Thats some dope sh*t Cpl