In Reply to: RE: OK now I am totally confused... posted by Lew on June 5, 2012 at 07:01:19:
The reason you can reduce the capacitor value is that the resistor and cap set the crossover frequency, without the resistor the impedance of the circuit at the crossover frequency is considerably higher. In fact so much higher that I suspect that 10-15uf is closer to the mark.
The transformer can be saturated by low frequencies but saturation is very different from actual damage. I think you will find it pretty hard to damage the transformer! Saturation, OTHO will manifest as temporary distortion on transients. If you were able to keep the transformer in saturation, eventually you could overheat it but it would sound bad and most reasonable audiophiles would turn the volume down at that point so there would be no time from the transformer to heat up enough for actual damage. Just my opinion mind you, but damaging the transformer seems remote, and if you have the cap (above) installed its just not going to happen.
This will result in a bumpy impedance curve. In stock form the speaker has a fairly flat curve through the midrange, caused by that resistor, and that curve is hard to drive because the resistor is where most of the power is going- that is why its rated with such a large wattage. However it appears that even transistor amps benefit from getting rid of the resistor, despite the resulting impedance curve! That is because the energy made by the amp is radiated into the room rather than being converted to heat.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: OK now I am totally confused... - Ralph 08:56:55 06/05/12 (27)
- I tried it with a 24uF cap and sounded horrible - Penguin 18:12:52 06/06/12 (15)
- RE: I tried it with a 24uF cap and sounded horrible - Lew 15:01:14 06/07/12 (2)
- I did not try it with the MA1 - Penguin 20:01:49 06/07/12 (1)
- taking just the resistor did not work - Penguin 21:24:44 06/07/12 (0)
- RE: I tried it with a 24uF cap and sounded horrible - Ralph 07:46:55 06/07/12 (11)
- Very distorted on bass and transients like an amp clipping - Penguin 08:44:19 06/07/12 (10)
- RE: Very distorted on bass and transients like an amp clipping - Ralph 10:16:31 06/07/12 (9)
- Not the removal of cap:) - Penguin 12:42:00 06/07/12 (8)
- RE: Not the removal of cap:) - Ralph 14:41:52 06/07/12 (7)
- exactly.... - Penguin 20:12:26 06/07/12 (6)
- RE: exactly.... - Ralph 08:48:45 06/08/12 (5)
- hmmm - Penguin 10:32:03 06/08/12 (4)
- Another way to think of it - Lew 22:54:30 06/08/12 (2)
- or just simply - Penguin 08:19:51 06/09/12 (1)
- RE: or just simply - tyu 08:53:15 06/09/12 (0)
- RE: hmmm - Ralph 11:45:56 06/08/12 (0)
- RE: OK now I am totally confused... - Lew 12:35:34 06/05/12 (10)
- I was using a different chart - Ralph 13:49:13 06/05/12 (9)
- RE: I was using a different chart - Lew 19:18:09 06/05/12 (8)
- RE: I was using a different chart - Ralph 09:07:15 06/06/12 (7)
- RE: I was using a different chart - Lew 06:56:24 06/07/12 (6)
- RE: I was using a different chart - Ralph 07:51:46 06/07/12 (2)
- RE: I was using a different chart - Lew 14:55:45 06/07/12 (1)
- RE: I was using a different chart - Ralph 08:41:04 06/08/12 (0)
- RE: I was using a different chart - KIS 07:31:47 06/07/12 (2)
- RE: I was using a different chart - Lew 14:51:35 06/07/12 (1)
- RE: I was using a different chart - Ralph 09:22:17 06/08/12 (0)