Hi
I have an old Audiolab 8000A and 8000P 'biamped' to some Rogers LS55 loudspeakers. The 8000A on its own has never had a problem driving the LS55s, but I have had some amps that just couldnt cope.
6 months ago, I changed the passive xover caps of the speakers to polyprops as someone somewhere recommended it.(well it was xmas and I needed a pressy...)
This system initially started with the 8000A driving the LS55s, then I added the 8000P and then I changed the caps. I noticed a small improvement adding the 8000P but cant say for sure about the crossover caps.
When changing the xover caps, I seem to remember thinking although the LS55 has 1 tweeter and 2 woofer drivers, both woofers were being driven as a bass woofer with no mid. I may be wrong as it was a few months ago when I looked but if Im right, may explain someway why a strong amp is needed for these speakers.
In reading stuff, I came across the expression 'true biamping' and found that there is a way to put the xovers after the preamp and before the amp and this is true biamping apparently. It is supposed to give sonic benefits.
Further reading has shown me these 'Active Xovers' seem to be 3rd to 4th order op amp filter circuits like the ones I had to learn about in electronics over 20 years ago.
Im sure I could revisit all that lovely old electronics again and have a go at designing something myself, but before I do, is there anything out there that is not too expensive and very good, that is recommended.
For example, I have seen someone recommend a Behringer cx2310 and for approx £60 would be fine.
Although I can understand the theory, the practical side is new to me, so would welcome anyones opinions and info.
I have scopes, dvms, sig gen, and multiple pairs of glasses, so can do a bit of diy.
I have an old Audiolab 8000A and 8000P 'biamped' to some Rogers LS55 loudspeakers. The 8000A on its own has never had a problem driving the LS55s, but I have had some amps that just couldnt cope.
6 months ago, I changed the passive xover caps of the speakers to polyprops as someone somewhere recommended it.(well it was xmas and I needed a pressy...)
This system initially started with the 8000A driving the LS55s, then I added the 8000P and then I changed the caps. I noticed a small improvement adding the 8000P but cant say for sure about the crossover caps.
When changing the xover caps, I seem to remember thinking although the LS55 has 1 tweeter and 2 woofer drivers, both woofers were being driven as a bass woofer with no mid. I may be wrong as it was a few months ago when I looked but if Im right, may explain someway why a strong amp is needed for these speakers.
In reading stuff, I came across the expression 'true biamping' and found that there is a way to put the xovers after the preamp and before the amp and this is true biamping apparently. It is supposed to give sonic benefits.
Further reading has shown me these 'Active Xovers' seem to be 3rd to 4th order op amp filter circuits like the ones I had to learn about in electronics over 20 years ago.
Im sure I could revisit all that lovely old electronics again and have a go at designing something myself, but before I do, is there anything out there that is not too expensive and very good, that is recommended.
For example, I have seen someone recommend a Behringer cx2310 and for approx £60 would be fine.
Although I can understand the theory, the practical side is new to me, so would welcome anyones opinions and info.
I have scopes, dvms, sig gen, and multiple pairs of glasses, so can do a bit of diy.
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