I am in the process of building yet another LS3/5 'work-a-like' and I found images of the Rogers L35b woofer and XA75 crossover, which in conjunction with an LS3/5 makes the Rogers "reference system" or something.
Anyone have some hint as to the crossover point/slope of the XA75? Of course a schematic would be neat, but I doubt that exists. Searching around only hints at an old for sale add from a fellow in japan?
The Unofficial LS3/5A Support Site was where I initially spotted this image, so if they don't have more (that I can see) I'm thinking this is a long shot...
Anyone have some hint as to the crossover point/slope of the XA75? Of course a schematic would be neat, but I doubt that exists. Searching around only hints at an old for sale add from a fellow in japan?
The Unofficial LS3/5A Support Site was where I initially spotted this image, so if they don't have more (that I can see) I'm thinking this is a long shot...
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LS3/5A AB1 and Sub Woofers
It's an electronic crossover on a biamped system. Makes sense because the big woofer would be far too loud in a passive system.
This AB1 evidently works on passive series filter:
LS3/5A Home-made Bass Extenders
You could use almost any 5" driver with a bit of bass ability in my opinion.
A bit of modelling would tell you how it works:
Software | Visaton
Import a similar project to the projekte folder and you can then adjust it.
Alto Line MK II – Boxsim Projektdatenbank
It's an electronic crossover on a biamped system. Makes sense because the big woofer would be far too loud in a passive system.
This AB1 evidently works on passive series filter:
LS3/5A Home-made Bass Extenders
You could use almost any 5" driver with a bit of bass ability in my opinion.
A bit of modelling would tell you how it works:
Software | Visaton
Import a similar project to the projekte folder and you can then adjust it.
Alto Line MK II – Boxsim Projektdatenbank
Thanks System7, but what I am after is what crossover point between the L35b subwoofer and the LS3/5 as performed by the XA75 active crossover box.
note the box sat on the left speaker. It resembles the Rogers A75 stereo amp, but it is called the XA75 and performs the active crossover and secondary amplification for the L35B.
note the box sat on the left speaker. It resembles the Rogers A75 stereo amp, but it is called the XA75 and performs the active crossover and secondary amplification for the L35B.
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it's been a long time but maybe someone is still interested. I'm currently working in a LS3/5a & LS35B system employing the Rogers AX75 active crossover so I traced the AX75 circuit.
Attached is the CX board schematic, pics and the bode plot (LTSpice).
The power amplifier module on the AX75 is the same used in the Rogers A75 integrated amplifier. It's attached too.
Attached is the CX board schematic, pics and the bode plot (LTSpice).
The power amplifier module on the AX75 is the same used in the Rogers A75 integrated amplifier. It's attached too.
