BRockyC Posted October 1, 2018 Share Posted October 1, 2018 The b2 has a 20uF across the woofer inputs. A 3uF instead of a 4uF for the squawker. A 245uH inductor on the tweeter inputs. And the squawker and tweeter are not in phase with the woofer. Questions: has anyone listened to both, with new caps, and could tell a difference? The reason for this question is some threads show people buying type B and/or rebuild Bs but not B2s. Quote Link to comment Share on other sites More sharing options...
jjptkd Posted October 1, 2018 Share Posted October 1, 2018 I believe the B2 had steeper crossover slopes and a boost in the woofer section 400-600hz IIRC there is a paper on the changes and reasons for them Quote Link to comment Share on other sites More sharing options...
BRockyC Posted October 2, 2018 Author Share Posted October 2, 2018 I've searched: network AND type AND B AND B2 and ended up with 800 pages to go through. Any ideas how I should search for it? See, I'm going to replace caps.... but should I stay with B or upgrade to B2? I've read people returning to B but the post are from 2002 and no reason was given why. What does the 20uF do? Raise the 400K to 600K? Or cut sub-woofer, <20K, to remove distortion? Yay.... I'm a newbee.... Quote Link to comment Share on other sites More sharing options...
Frzninvt Posted October 2, 2018 Share Posted October 2, 2018 Cornwall's don't have a subwoofer they have a woofer. I would not alter the network as it was changed most likely to accommodate a driver change you will be doing more harm than good. You have two caps to change in a B network a 4uf and a 2uf and you can update the coil to a sledgehammer version inexpensively, the auto-former should be fine.. Quote Link to comment Share on other sites More sharing options...
Schu Posted October 2, 2018 Share Posted October 2, 2018 @Dean-g ... Quote Link to comment Share on other sites More sharing options...
Deang Posted October 4, 2018 Share Posted October 4, 2018 . DFHB2.pdf Quote Link to comment Share on other sites More sharing options...
rebuy Posted October 4, 2018 Share Posted October 4, 2018 54 minutes ago, Deang said: . DFHB2.pdf Love the new pic with description. Quote Link to comment Share on other sites More sharing options...
Deang Posted October 4, 2018 Share Posted October 4, 2018 2 minutes ago, rebuy said: Love the new pic with description. lol. Quote Link to comment Share on other sites More sharing options...
Oicu812 Posted October 8, 2018 Share Posted October 8, 2018 On 10/1/2018 at 1:22 AM, BRockyC said: The b2 has a 20uF across the woofer inputs. A 3uF instead of a 4uF for the squawker. A 245uH inductor on the tweeter inputs. And the squawker and tweeter are not in phase with the woofer. Questions: has anyone listened to both, with new caps, and could tell a difference? The reason for this question is some threads show people buying type B and/or rebuild Bs but not B2s. There's a bit of a learning curve, and it's much more of an involved answer than most posters would want to try and type out. So here goes: https://www.audioholics.com/loudspeaker-design/crossover And part two: https://www.audioholics.com/loudspeaker-design/the-loudspeaker-crossover This will give you the basics, and you will come away with an understanding of the difference between the "B" and "B2" crossovers. You will also be able to have an opinion of your own regarding the differences in the two variants of the networks. As you can see, it is a much deeper subject than can be typed out in a simple response on a forum... Quote Link to comment Share on other sites More sharing options...
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