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My favorite sub that is going back for a warranty situation. So in the meantime I have cobbled together a sub to use in the interim. This woofer is NOT well suited to the enclosure I am going to use it in but it is already on hand and only has to last a few weeks.
Here is the needed info:
I ordered an MCM 300 watt a/ 4ohm or 200 watt a/ 8 ohm plate amp to replace the blown amp that put the sub in the garage to begin with.
The DVC subwoofer I have is dual 4ohm coils and needs about 150 watts a coil in my opinion to sound “decent”.
Xmax of 15.8mm
Fs of 30hz
Vas of 1.35 ft
(and here in lies the rub) a Qes of .65 so it doesn’t plot well in the 2.8ft ported box tuned at 27hz but it DOES sound um….ok.
It starts to roll off at exactly as the plots states when modeled (a small peak between 33hz to 44hz and steeeeep roll off after 27hz) when both coils are fed 200 watts.
Soooo…. My question is:
Will it be better to run a single 4 ohm coil at 300 watts or both coils added up to 8 ohm (2 ohm load + Plate amp = roasting marsh-mellows over burning transistors) and only give each coil 100 watts?
I know I double the Qes when running a single coil but I can always short across the other coil to act as an electrical brake and bring the Qes back down a bit. Or even install a potentiometer in place of a short to dial the damping in.
Here is the needed info:
I ordered an MCM 300 watt a/ 4ohm or 200 watt a/ 8 ohm plate amp to replace the blown amp that put the sub in the garage to begin with.
The DVC subwoofer I have is dual 4ohm coils and needs about 150 watts a coil in my opinion to sound “decent”.
Xmax of 15.8mm
Fs of 30hz
Vas of 1.35 ft
(and here in lies the rub) a Qes of .65 so it doesn’t plot well in the 2.8ft ported box tuned at 27hz but it DOES sound um….ok.
It starts to roll off at exactly as the plots states when modeled (a small peak between 33hz to 44hz and steeeeep roll off after 27hz) when both coils are fed 200 watts.
Soooo…. My question is:
Will it be better to run a single 4 ohm coil at 300 watts or both coils added up to 8 ohm (2 ohm load + Plate amp = roasting marsh-mellows over burning transistors) and only give each coil 100 watts?
I know I double the Qes when running a single coil but I can always short across the other coil to act as an electrical brake and bring the Qes back down a bit. Or even install a potentiometer in place of a short to dial the damping in.