Field Coils for Audio Systems

[Audiophile Bill]

I posted on my system build thread but posting here in case folks here don’t go there.
Got the monster FC motors today. Stunning build quality - looking forward to firing them up soon. Got a couple of variable LPSs to get me started.

 

[ArnoFenn]

Very Impressive!

 

[Audiophile Bill]

Very Impressive!

They are awesome, Arno. They look like the Rolls Royce of speaker motors lol.

 

[ArnoFenn]

where did you get them?

 

[dcathro]

They are awesome, Arno. They look like the Rolls Royce of speaker motors lol.

I am sure you are going to be blown away when you hook these up!

 

[the sound of Tao]

I posted on my system build thread but posting here in case folks here don’t go there.
Got the monster FC motors today. Stunning build quality - looking forward to firing them up soon. Got a couple of variable LPSs to get me started.

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As the engine for a driver they just look amazing… totally different level of impressive… very exciting stuff. The idea that you’re building something rather wonderfully bespoke really does come through here Bill (hope you’re keeping a video trail of the journey ). It’d be amazing to see these come to life.

 

[Audiophile Bill]

where did you get them?

Custom Russian designer / engineer

 

[morricab]

I posted on my system build thread but posting here in case folks here don’t go there.
Got the monster FC motors today. Stunning build quality - looking forward to firing them up soon. Got a couple of variable LPSs to get me started.

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Jesus! They’re huge!

 

[Audiophile Bill]

Jesus! They’re huge!

They really are, Brad lol. Absolute beasts.

 

[morricab]

They really are, Brad lol. Absolute beasts.

I guess you can't stick them in a mini-monitor! They would be bigger than the whole speaker!

 

[morricab]

They really are, Brad lol. Absolute beasts.

How was the gap defined?

 

[Audiophile Bill]

I guess you can't stick them in a mini-monitor! They would be bigger than the whole speaker!

would need to be a large monitor lol

 

[Audiophile Bill]

How was the gap defined?

Not sure - I left all the technical manufacture / specs to the engineer. All I have is a flux density map by voltage.

 

[Audiophile Bill]

Not sure - I left all the technical manufacture / specs to the engineer. All I have is a flux density map by voltage.

I was playing around with making my Stamm drivers field coil - was very easy to align so wonder whether there is a little more wiggle room.

 

[morricab]

I was playing around with making my Stamm drivers field coil - was very easy to align so wonder whether there is a little more wiggle room.

I am wondering because each driver will have a different voice coil thickness. Some will have perhaps too much space (and loss of force) and some will be too thick and scrape the sides.

 

[Audiophile Bill]

I am wondering because each driver will have a different voice coil thickness. Some will have perhaps too much space (and loss of force) and some will be too thick and scrape the sides.

I am not sure whether there is an established common metric for these. Fortunately mine were made for AER and Lowther.

 

[Audiophile Bill]

I am not sure whether there is an established common metric for these. Fortunately mine were made for AER and Lowther.

also to be honest, I wouldn’t be surprised if my Stamm magnets are made by Lowther. Pretty sure voxativ are same spec too.

 

[Atmasphere]

Jesus! They’re huge!

This is a good reason why FC is usually more expensive than permanent magnets

 

[AMR / iFi audio]

I posted on my system build thread but posting here in case folks here don’t go there.
Got the monster FC motors today. Stunning build quality - looking forward to firing them up soon. Got a couple of variable LPSs to get me started.

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These are really enormous! It looks like they can move a chair, a table, or maybe even a wall, not a speaker.... I am really curious about the result of your work.

How big do you want your speakers to be?

 

[Audiophile Bill]

These are really enormous! It looks like they can move a chair, a table, or maybe even a wall, not a speaker.... I am really curious about the result of your work.

How big do you want your speakers to be?

My top horn is 80cm diameter so they are big
They are around 180cm tall total.