Quote:
Jodean wrote:
 3) If i get a dvc 8 ohm or 4 ohm......can i get by with 80w (8 ohm) per coil for now until i find an amp? I have an old sansui im currently using to power my sub. |
Yes... it would work until you upgrade.
You would need to put two sets of binding posts on the sub enclosure, one for each voicecoil, as I'm certain the Sansui amplifier would not allow you to bridge the outputs.
That's not really a show-stopper... Just something to remember as you start your parts orders.
Dual 8 ohm voicecoils are probably your best bet. That way you could feed each with a channel of your amplifier. If your amplifier can handle 4 ohm loads, then dual 4 ohm voice-coils might work for you too. They just make it a lot harder if you upgrade the amplifier to a single channel plate amplifier.
Two 4 ohm coils in series would be equal to 8 ohms... a good load for a lot of plate-amplifiers, but an amplifier like mine, rated at 250 watts into 4 ohms only outputs about 150 or so into 8 ohms. The odds are you will not get the full output you might expect. (possibly not much better than your existing Sansui amp)
Two 4 ohm voicecoils in parallel would be a 2 ohm load, far too low for most plate amplifiers.
So, dual 4 ohm voicecoils are OK, but not a good match to a single channel plate amplifier. They would work ok with a "Pro" amplifier that can handle bridging, or 2 ohm loads.
On the other hand, two 8 ohm voicecoils in parallel are equal to a 4 ohm load. Perfect for most plate-amplifiers as a 4 ohm load and (wired separately as two 8 ohm loads) usable with your current amplifier. Just something else to think about as you shop for materials.
Joe L.