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#41
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Dynaco A25 XL Speaker - Need crossover diagram.
"Dick Pierce" wrote in message
om "Arny Krueger" wrote in message ... "Tim Padrick" wrote in message An inductor in parallel with a tweeter, without a series capacitor, would be seen by the amp as a short at low frequencies. A cap in series with a woofer would roll off the low frequencies. Agreed, and that leaves some non-simple problems to solve. No it doesn't. Please see my post from 8:23 EST this morning. |
#42
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Dynaco A25 XL Speaker - Need crossover diagram.
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#43
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Dynaco A25 XL Speaker - Need crossover diagram.
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#44
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Dynaco A25 XL Speaker - Need crossover diagram.
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#46
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Dynaco A25 XL Speaker - Need crossover diagram.
"Pete Snyder" wrote in message
Arny: Mybe it would help the discussion if I included a "picture" of the actual crossover. Thanks but it is not necesary. I'm not the guy with the A-25 and I finally got Dick Pierce's point. If I want to look at an A25 crossover I would drop over my good friend's house. He uses two of them on his basement test bench. I'm a bit more modern - my test bench speakers are Paradigm Phantoms. |
#47
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Dynaco A25 XL Speaker - Need crossover diagram.
"Pete Snyder" wrote in message
Arny: Mybe it would help the discussion if I included a "picture" of the actual crossover. Thanks but it is not necesary. I'm not the guy with the A-25 and I finally got Dick Pierce's point. If I want to look at an A25 crossover I would drop over my good friend's house. He uses two of them on his basement test bench. I'm a bit more modern - my test bench speakers are Paradigm Phantoms. |
#48
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Dynaco A25 XL Speaker - Need crossover diagram.
"Pete Snyder" wrote in message
Arny: Mybe it would help the discussion if I included a "picture" of the actual crossover. Thanks but it is not necesary. I'm not the guy with the A-25 and I finally got Dick Pierce's point. If I want to look at an A25 crossover I would drop over my good friend's house. He uses two of them on his basement test bench. I'm a bit more modern - my test bench speakers are Paradigm Phantoms. |
#49
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Dynaco A25 XL Speaker - Need crossover diagram.
"Pete Snyder" wrote in message
Arny: Mybe it would help the discussion if I included a "picture" of the actual crossover. Thanks but it is not necesary. I'm not the guy with the A-25 and I finally got Dick Pierce's point. If I want to look at an A25 crossover I would drop over my good friend's house. He uses two of them on his basement test bench. I'm a bit more modern - my test bench speakers are Paradigm Phantoms. |
#51
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Dynaco A25 XL Speaker - Need crossover diagram.
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#52
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Dynaco A25 XL Speaker - Need crossover diagram.
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#53
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Dynaco A25 XL Speaker - Need crossover diagram.
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#54
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Dynaco A25 XL Speaker - Need crossover diagram.
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#56
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Dynaco A25 XL Speaker - Need crossover diagram.
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#57
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Dynaco A25 XL Speaker - Need crossover diagram.
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#59
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Dynaco A25 XL Speaker - Need crossover diagram.
Dick Pierce wrote:
(unitron) wrote in message . com... crossover. Here's the new circuit: * Series crossover analysis Vin 1 0 AC SIN 1.0 0.0 CWoof 1 2 25UF RWoof 1 2 8 LTweet 2 0 1MH RTweet 2 0 8 .AC OCT 3 20 20K .PRINT AC VDB(1, 2) VDB(2,0) .END So is the capacitor shunting the woofer or in series with it? Can't be both. Did you take the time to actually read the information I provided? Above is the netlist of the crossover topology I described. It's pretty definite: CWoof, a 25 uF capacitor is connected between nodes 1 and 2. So is the woofer. There's nothing in the netlist that could possibly lead to ANY other conclusion than the capacitor being in parallel with the woofer. The serial networks are also described in the Philips boook:"Building Hi-Fi Speaker Systems"(1977) which I found at a yard sale.For a 1st order XVR the reactance values are the same in parallel/serial=R at the XVR frequency but differ for 2nd order(butterworth) networks by a factor of 2;the serial version uses L*2 & C/2 compared to its parallel counterpart. In a MAR4/04 post I mentioned that the Woofer must have a series L because of a 2nd order rollof at 1.5khz but this is incorrect since the nearfield measurement is only valid to 500hx with a 10" WFR. |
#60
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Dynaco A25 XL Speaker - Need crossover diagram.
Dick Pierce wrote:
(unitron) wrote in message . com... crossover. Here's the new circuit: * Series crossover analysis Vin 1 0 AC SIN 1.0 0.0 CWoof 1 2 25UF RWoof 1 2 8 LTweet 2 0 1MH RTweet 2 0 8 .AC OCT 3 20 20K .PRINT AC VDB(1, 2) VDB(2,0) .END So is the capacitor shunting the woofer or in series with it? Can't be both. Did you take the time to actually read the information I provided? Above is the netlist of the crossover topology I described. It's pretty definite: CWoof, a 25 uF capacitor is connected between nodes 1 and 2. So is the woofer. There's nothing in the netlist that could possibly lead to ANY other conclusion than the capacitor being in parallel with the woofer. The serial networks are also described in the Philips boook:"Building Hi-Fi Speaker Systems"(1977) which I found at a yard sale.For a 1st order XVR the reactance values are the same in parallel/serial=R at the XVR frequency but differ for 2nd order(butterworth) networks by a factor of 2;the serial version uses L*2 & C/2 compared to its parallel counterpart. In a MAR4/04 post I mentioned that the Woofer must have a series L because of a 2nd order rollof at 1.5khz but this is incorrect since the nearfield measurement is only valid to 500hx with a 10" WFR. |
#61
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Dynaco A25 XL Speaker - Need crossover diagram.
Dick Pierce wrote:
(unitron) wrote in message . com... crossover. Here's the new circuit: * Series crossover analysis Vin 1 0 AC SIN 1.0 0.0 CWoof 1 2 25UF RWoof 1 2 8 LTweet 2 0 1MH RTweet 2 0 8 .AC OCT 3 20 20K .PRINT AC VDB(1, 2) VDB(2,0) .END So is the capacitor shunting the woofer or in series with it? Can't be both. Did you take the time to actually read the information I provided? Above is the netlist of the crossover topology I described. It's pretty definite: CWoof, a 25 uF capacitor is connected between nodes 1 and 2. So is the woofer. There's nothing in the netlist that could possibly lead to ANY other conclusion than the capacitor being in parallel with the woofer. The serial networks are also described in the Philips boook:"Building Hi-Fi Speaker Systems"(1977) which I found at a yard sale.For a 1st order XVR the reactance values are the same in parallel/serial=R at the XVR frequency but differ for 2nd order(butterworth) networks by a factor of 2;the serial version uses L*2 & C/2 compared to its parallel counterpart. In a MAR4/04 post I mentioned that the Woofer must have a series L because of a 2nd order rollof at 1.5khz but this is incorrect since the nearfield measurement is only valid to 500hx with a 10" WFR. |
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