parallel lm3886 question

[ryan750]

if i parallel 4 lm3886 driving a 1ohm load, then each ic would see a 4ohm load, am i right? what would be the disadvantages of this compared to bridge/parallel (BPA) config

another question,
what would be the best way of wiring a DVC sub, 2ohm each VC to 4 lm3886

1. wire the sub in parallel resulting to 1ohm impedance powered by 4 parallel ic, each seeing a 4ohm load

2. parallel 2 LM3886 and wire them independently into each 2ohm VC

3. the BPA200 config

any suggestion would be gladly appreciated, thanks

[pacificblue]

Originally posted by ryan750
if i parallel 4 lm3886 driving a 1ohm load, then each ic would see a 4ohm load, am i right?

Yes.

Originally posted by ryan750
what would be the disadvantages of this compared to bridge/parallel (BPA) config

None. BPA would need higher speaker impedance or you would have to parallel several BPAs.

Originally posted by ryan750
what would be the best way of wiring a DVC sub, 2ohm each VC to 4 lm3886

1. wire the sub in parallel resulting to 1ohm impedance powered by 4 parallel ic, each seeing a 4ohm load

2. parallel 2 LM3886 and wire them independently into each 2ohm VC

3. the BPA200 config

any suggestion would be gladly appreciated, thanks

Your choices 1 and 2 make little difference. The advantage for version 2 could be that you share the current across two speaker cables, so you can use a smaller wire diameter.

The BPA configuration can only drive 2 Ohm loads with a low supply voltage, and should better not be used below 4 Ohm.

How about wiring the voice coils in series? That gives you 4 Ohm and you could even try to work with a single IC. If you want to use more power, this is the configuration where you can use BPA.

[AndrewT]

wire the DVC in series to give an effective 4ohm load.

Then decide whether you want the complication of BPA200 or BPA300 or simply go to discrete for your amplification.