hi
I need two 0.47mH chokes. They need to be aircore and decently low DCR. I have a small budget. Any recommendation?
for your information, my crossover is:
For the Tweeter the resistors are 4R7 in series and 6R8 in parallel. Choke is 0.47mH and Capacitor is 1.5uF.
For the Midrange the RC across the driver is 12 Ohm and 4.7uF. The crossover Capacitor and Inductor for the Lowpass are 2.2uF and 0.5mH.
thanks
I need two 0.47mH chokes. They need to be aircore and decently low DCR. I have a small budget. Any recommendation?
for your information, my crossover is:
For the Tweeter the resistors are 4R7 in series and 6R8 in parallel. Choke is 0.47mH and Capacitor is 1.5uF.
For the Midrange the RC across the driver is 12 Ohm and 4.7uF. The crossover Capacitor and Inductor for the Lowpass are 2.2uF and 0.5mH.
thanks
really? so what type of resistor to use?
..the resistance of the coil itself.
I think for inductors (beyond it's own resistance) it's about mechanical damping - solution there is just "pot" the thing in some higher temp. wax (..or resin, but I'd prefer the wax).
-resistors (beyond resistance) can and do sound different depending on the application, again likely a mechanical damping effect.
Last edited:
Okay, I thought you mean that the resistors in my crossover need to be of high quality? Is that also the case, like in the tube amp, where the cathode ressitor must be different then the plate resistors, ect
can you help me to find good chokes: they need to be aircore and decently low DCR. Theres too much choice at newark, I have no idea which to pick really....
can you help me to find good chokes: they need to be aircore and decently low DCR. Theres too much choice at newark, I have no idea which to pick really....
what is a good decent low dcr value?
this is 0.22 ohm, is that decently low?
B82792C2474N315 - EPCOS - CHOKE, QUAD, 0.47MH | Newark/element14 Canada
this is 0.22 ohm, is that decently low?
B82792C2474N315 - EPCOS - CHOKE, QUAD, 0.47MH | Newark/element14 Canada
I ahve 700 result at newark with chokes of 0.47 mh
Your Search Results | Newark/element14 Canada | Results
please somebody help
Your Search Results | Newark/element14 Canada | Results
please somebody help
please somebody help
you should be looking at inductors for speakers, not electronics. Small inductors for surface electronics have very low current capability.
partsconnexion, madisound, parts express speaker section, etc..
something like this will do the trick... 0.47 mH 14AWG Air Core 0.16Ω DCR (Coil 10) [2810] - $16.68 : SpeakerBug, capacitors, inductors, resistors, crossover parts, speaker supplies
But I second Sreten on the winding your own if you are on a budget. You can check out my blog if you decide you want to go down that path
Tony.
But I second Sreten on the winding your own if you are on a budget. You can check out my blog if you decide you want to go down that path
Tony.
Ah that is actually a common misconception. In fact the DCR in shunt coils on tweeters IS important. The lower the better. The reason being that it is the LOW frequencies that you want to be shunted off (as you don't want them distorting and intermodulating your tweeter), so if the DCR is high then those low frequencies can't pass so easily and the coil does not do it's job as well as intended. This post http://www.diyaudio.com/forums/mult...eble-but-without-sibilance-2.html#post2605112 has the reasoning behind this.
Tony.
Tony.
Yes but within reason. The guy said low budget, and combined with the fact, that its already filtered thru a 1,5uf cap. It has to be a very expensive choke to make any percieved difference.Ah that is actually a common misconception. In fact the DCR in shunt coils on tweeters IS important. The lower the better. The reason being that it is the LOW frequencies that you want to be shunted off (as you don't want them distorting and intermodulating your tweeter), so if the DCR is high then those low frequencies can't pass so easily and the coil does not do it's job as well as intended. This post http://www.diyaudio.com/forums/multi...ml#post2605112 has the reasoning behind this.
I wouldn't call ~$17 a very expensive choke esepcially since it has a DCR of 0.16ohms which is decently low.... yes you could go with the 20ga one at $5.00 but it has a DCR of 0.47 ohms, which I would think will start to make a difference. But obviously there is a point of diminishing returns
Attached is the sim from my crossover for my mtm's. The shunt coil is in a 3rd order network, and is 180uH and had dcr of 87 milli ohms. If I increase the DCR to 470milli ohms I get the blue curve. It may not look that significant but the is 10db more energy getting through to the tweeter at 100Hz with the higher dcr coil. That is what Simon, and Lynn in the thread I linked to are saying is really bad. In a second order (electrical) network the difference may be greater.
Tony.
Attached is the sim from my crossover for my mtm's. The shunt coil is in a 3rd order network, and is 180uH and had dcr of 87 milli ohms. If I increase the DCR to 470milli ohms I get the blue curve. It may not look that significant but the is 10db more energy getting through to the tweeter at 100Hz with the higher dcr coil. That is what Simon, and Lynn in the thread I linked to are saying is really bad. In a second order (electrical) network the difference may be greater.
Tony.
Attachments
There is a swap meet page - whata got to trade?
Good quaitly .47 chokes would not be hard to find on DIY.
Good quaitly .47 chokes would not be hard to find on DIY.
hi
I need two 0.47mH chokes. They need to be aircore and decently low DCR. I have a small budget. Any recommendation?
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Loudspeakers
- Multi-Way
- Recommendation for a crossover choke