RAM 150 crossover questions

Moonunit2004

Moonunit2004

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Hello all, I need some advice form you all. I have a pair of RAM 150 speakers which are working but don't think to their full potential. I would like to start by replacing the capacitors, preferably using similar components. I need 16 MFD 50v, 5 MFD 50v and what looks like 4.7 low loss 50v. I can't find any exact but Falcon have alcaps in correct MFD but are all low loss. Would they be suitable? Or do you have any recommendations. I have attached some images which show the crossover. Another thing is the resistor is 3.3 ohm but not sure of the wattage .. thanks in advance
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The resistor looks like 5 watts rating. It will do no harm at all to go higher, as long as it fits the board. I wouldn't go any lower than 5W as it'll overheat.

As to the capacitors, I wouldn't worry too much if they're all low loss, as a simple crossover as you have won't be that critical. The important thing is for them to be non polar electrolytics, not polyester or other non electrolytics as these are physically much larger, much more expensive, and have different electrical properties.

S
 
Sergeauckland said:
The resistor looks like 5 watts rating. It will do no harm at all to go higher, as long as it fits the board. I wouldn't go any lower than 5W as it'll overheat.

As to the capacitors, I wouldn't worry too much if they're all low loss, as a simple crossover as you have won't be that critical. The important thing is for them to be non polar electrolytics, not polyester or other non electrolytics as these are physically much larger, much more expensive, and have different electrical properties.

S
Click to expand...
Thanks very much for your help and expertise.
 
Those red and black ebcaps were
Not the highest quality. Nearly all.manufacturers used them.
You will hear a difference with new ones.p
 
I think low loss means low ESR (resistance) so its possible they will change the sound a little. That could be for the better as much as worse.

You can also parallel capacitors to add the values so a 10 and a 6 make 16MF. The 100V ones are fine too.
 

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