.7 Magnepan crossover schematic and mods

[DIYspaceW]

I want to change the bass response of the .7 magnepans and cant find any schematic posted on net! What I want to do is to add an active sub that will do the bass segment from 80hz down and the panels should do the rest!

 

[RogerGustavsson]

It depends on if you want to do this passive (speaker level) or active (line level). I think you would like to cut at 80 Hz rather steeply, then you need an active filter. Does the sub(s) have their own crossover and amp? I would not add a high pass passive filter to the speakers.

 

[DIYspaceW]

The dilema is I have RELs and they have high input feature who works the best! So an line level active crossover would solve the priblem easy but then I have to move away from the RELs connection!
But this maybe the best way to do it as the RELs will get only low signals filtered from active cross over....
Anyway have you a good active crossover in mind to do the task?

 

[DIYspaceW]

Does someone have the .7 crossover schematic?

 

[Davey]

They don't provide schematics any longer, and I haven't seen a 0.7 schematic posted anywhere. But you have the speakers, yes? Simply follow the components/wiring and draw one yourself.

Regardless, a schematic won't help you with bass response modification. You should do that at line-level.

Dave.

 

[N101N]

You don`t need a schematic diagram, just use a 6dB high-pass filter.

 

[DIYspaceW]

Thank you guys! Yes I will have to do so....I havent open it up but the passive crossover looks simple...
The best I will use aktive crossover and maybe upgrade the parts quality in the passive crossover.

 

[N101N]

You could start out by inserting a series capacitor with 100Hz cutoff frequency at the input of the amplifier.

 

[DIYspaceW]

I have figured out the crossover schematic so my Q is how to modify it for biamping?
Its a series crossover + woofer bypassed with 100uF following 1R resistor bypassed with fuse followed tweeter - (minus) side bypassed with an 0.4mH inductor - the cap and the inducor are series connected.

 

[Davey]

You can't bi-amp a series crossover. You'll have to disconnect it and use a crossover at line level.

Dave.

 

[ctbarker32]

I want to change the bass response of the .7 magnepans and cant find any schematic posted on net! What I want to do is to add an active sub that will do the bass segment from 80hz down and the panels should do the rest!

You might watch my video. I link to the part of interest to you for an inexpensive solution:

 

[DIYspaceW]

You might watch my video. I link to the part of interest to you for an inexpensive solution:

Great info, thank you! How about sound quality as you use more crossover components?

 

[DIYspaceW]

Hmmm after evaluation I thinks as many suggested a line crossover is the best way! This high line high pass filter crossover from partsexpress has huge el. capacitors in front, I think you will do more harm than good...Other aproach could also be an active bi amping system some power amps have build in dsp function. Here is the question how to change the original crossover any idea? First of all I need to desolder the 4 ribbon wires and measure DC resistance of the two ribbons.

 

[Davey]

You shouldn't need to do any de-soldering. The Magnepan transducer connections are made with standard male/female disconnects. (0.187" or 0.205")
The whole crossover assembly can be electrically undone by removing four connections in each speaker.

Dave.