Monacor LSI-47T Tranformer Coil 4.7mH
Not exactly 5mH and currently unavailable, but you can send a request when they'll back.
Not exactly 5mH and currently unavailable, but you can send a request when they'll back.
I don't know if it was mentioned, but I think the Jantzen C-Coil is one of the best bass coils, available in the linked shop, with several sizes of cores and wires:
000-6260 5mH Jantzen C-Coil, 15AWG, 1.4mm diameter wire | Hifi Collective
000-6260 5mH Jantzen C-Coil, 15AWG, 1.4mm diameter wire | Hifi Collective
I can make inductors with values which i need. It is easier this way because i need many different values. It is not hard to make inductors. I have made many air cored inductors last night (New Year Eve). Happy New Year!
very nice! do you bake them too?
But these are toroidal cores.. with the small number of turns needed and therefore the dependence on the iron?
There appears to be an obsession with resistance in bass coils. Sure it sometimes isn't needed, but I don't see very many examinations of cores for a given application. Air cores don't have the same set of problems.
Hi AllenB!
Your replies are often riddles to me. 🙂
If I understand you correctly, then yes, these toroidal C-Coils are very dependent on the magnetic core, that is created from laminated steel in this case. It's not recommended for midrange or tweeter, because the core is large and the number of wire turns is low, so you need a lot of electrical current for proper magnetization.
But this thread is for bass coils as I see. 🙂
The C-Coil is one alternative for bass crossovers. There are also different core sizes for different requirements.
C-Coil - Toroidal Core - Jantzen-audio.com
Your replies are often riddles to me. 🙂
If I understand you correctly, then yes, these toroidal C-Coils are very dependent on the magnetic core, that is created from laminated steel in this case. It's not recommended for midrange or tweeter, because the core is large and the number of wire turns is low, so you need a lot of electrical current for proper magnetization.
But this thread is for bass coils as I see. 🙂
The C-Coil is one alternative for bass crossovers. There are also different core sizes for different requirements.
C-Coil - Toroidal Core - Jantzen-audio.com
great, so if you hook them up to your amp and turn up the volume and play some music you will not hear any noise from the coils?
I dipped the inductors into a epoxy varnishing tray before baking them for 3 hours. I don't hear any noise from the coil when playing music. I dipped them for an hours to make sure the epoxy varnishing fills all the gaps. After baking the inductors become solid.
Last edited:
Deni, thanks for the extra information. What do you think about air cores, where there can be no core distortion/saturation?
Allen, I like air core inductors for midrange and tweeter, where attenuation is almost always need anyway, so the extra coil resistance can even be an advantage.
But for bass, I like low resistance for minimized losses/maximum efficiency. A good core with adequate sizing will not saturate/distort before the driver gives up. Of course there is an upper limit, but those C-Coils (the larger cores) can be used even up to thousands of Watts without noticable distortion or overheating. The smaller ones is good up to few hundred Watts, which is usually enough for home usage.
But for bass, I like low resistance for minimized losses/maximum efficiency. A good core with adequate sizing will not saturate/distort before the driver gives up. Of course there is an upper limit, but those C-Coils (the larger cores) can be used even up to thousands of Watts without noticable distortion or overheating. The smaller ones is good up to few hundred Watts, which is usually enough for home usage.
You'd be surprised at the effect of shunt coil resistance. It is quite clear in a simulation, and the effect in real life can be even more exaggerated. With low crossover points, it might be useful to examine DCR.
For example, in a 1.6k crossover I've used 0.5mH laminate coil in shunt path to claw back a bit of attenuation. There's as much as 2dB extra in the first octave below XO (this is a 6th order crossover, for tweeter protection and control over a large woofer's resonance at 3kHz).
Obviously you can't use solid or laminate in series path or for crossover above above 2kHz, but you can still target low DCR coils - not for the resistance, but better control over tweeter slope.
For example, in a 1.6k crossover I've used 0.5mH laminate coil in shunt path to claw back a bit of attenuation. There's as much as 2dB extra in the first octave below XO (this is a 6th order crossover, for tweeter protection and control over a large woofer's resonance at 3kHz).
Obviously you can't use solid or laminate in series path or for crossover above above 2kHz, but you can still target low DCR coils - not for the resistance, but better control over tweeter slope.
The last time I looked at their data sheet, it was incomplete. Of course, coils don't consume Watts and they are dependent on the individual crossover. Could you link to something that shows the toroids handle more power than gapped cores, or anything along these lines?
Sorry, I can't show a power handling test for the Jantzen toroids, I only relied on the manufacturer's data, but I think Jantzen Audio is reliable in this respect.
But if anyone is interested in how the power handling of the C-Coils in the data sheet have been determined, just send an email to Jantzen Audio, I think they will respond.
Allen, you’re not entirely right about the power consumption of coils because they can certainly consume Watts because they have resistance, the higher the resistance, the higher their power consumption. That higher resistance is one drawback of the air core coils, they can heat up earlier, which leads to even higher resistance, but of course that depends on the loudspeaker and crossover construction and the usage.
But if anyone is interested in how the power handling of the C-Coils in the data sheet have been determined, just send an email to Jantzen Audio, I think they will respond.
Allen, you’re not entirely right about the power consumption of coils because they can certainly consume Watts because they have resistance, the higher the resistance, the higher their power consumption. That higher resistance is one drawback of the air core coils, they can heat up earlier, which leads to even higher resistance, but of course that depends on the loudspeaker and crossover construction and the usage.
Last edited:
But that's not what I meant, was it 😉
On other matters, to get the resistance the same you make them bigger, with heavier wire. If resistance is your focus then the problem with air cores is the size and weight.
Everything is relative.