I'm looking to modify my beloved Braun LS200 speakers. In fact, they're nice speakers but I'm curious to know. The LS200 are 3-way system with 4 drivers including 2 twin woofers. I've played with them by unplugging other drivers and listen to a single driver. I found that the woofers not only play bass but also midrange. I, then, tried using graphic equalizer and discovered that eliminating midrange from the woofers satisfied me. I tried tweaking passive crossovers many times to suit the setting on EQ, but, none of them archived the target.
However, I have the last method. I found the schematic of B&W Matrix 3 series 2 which are 2.5-way system. It sparked an idea. Attached is the low-pass filter circuit of the B&W.
Regarding L2 (8 mH) on the B&W's schematic, I think to add a large inductor to one of the LS200's woofers, red circle in the picture.
The objective is to limit the midrange from one woofer. On the other hand, my LS200 would be converted to 3.5-way system. Anyway, I have 5.6, 6.6 and 8.2 mH inductors in my hand. I'm thinking to try them all. But, I'm not sure whether it will create any problems. Please advice if there're problems occur; such as too low impedance, distortion created, or low-pass filter modification needed, etc. If there're any, then, I will stop this project. But if it's fine, I will go on.
However, I have the last method. I found the schematic of B&W Matrix 3 series 2 which are 2.5-way system. It sparked an idea. Attached is the low-pass filter circuit of the B&W.
Regarding L2 (8 mH) on the B&W's schematic, I think to add a large inductor to one of the LS200's woofers, red circle in the picture.
The objective is to limit the midrange from one woofer. On the other hand, my LS200 would be converted to 3.5-way system. Anyway, I have 5.6, 6.6 and 8.2 mH inductors in my hand. I'm thinking to try them all. But, I'm not sure whether it will create any problems. Please advice if there're problems occur; such as too low impedance, distortion created, or low-pass filter modification needed, etc. If there're any, then, I will stop this project. But if it's fine, I will go on.
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Hi,
With such a large inductance sensivity of one driver will drop also in bass, so I do not think it will give similar results that you achieved by using eq.
Also the impedance seen by prevous stage will change, so x-o frequency of another driver will be affected.
Worth experimenting it, but using modeling program is highly suggested.
Regards
With such a large inductance sensivity of one driver will drop also in bass, so I do not think it will give similar results that you achieved by using eq.
Also the impedance seen by prevous stage will change, so x-o frequency of another driver will be affected.
Worth experimenting it, but using modeling program is highly suggested.
Regards
To date, I’ve been playing with EQ. I discovered that there are two styles of EQ that satisfy me. The only difference between them is at 150Hz position. For style 1, the 150Hz will be aligned linearly to the 60Hz and the 400Hz will be the lowest position. While, in style 2, the 150Hz will be the lowest point and linearly aligned from 400Hz. As can be seen, the change only involved with the response of the woofers.
This is a bit puzzled to interpret whether the addition of a large inductor to one of the woofers, or 3.5-way conversion, will produce these results. Or, from another point of view, it may be interpret that these results are obtained by the change of low-pass’s “slope”. For instance, 12dB/octave vs. 24dB/octave slopes.
Which one is correct, the former or the latter, please?
This is a bit puzzled to interpret whether the addition of a large inductor to one of the woofers, or 3.5-way conversion, will produce these results. Or, from another point of view, it may be interpret that these results are obtained by the change of low-pass’s “slope”. For instance, 12dB/octave vs. 24dB/octave slopes.
Which one is correct, the former or the latter, please?
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