So, "bigger is better"?
My preference is the opposite , and have wires to drivers as short as possible , the added inductance between xover and driver will smear the mid/top end ..
If you're worried about adding inductance, you get more inductance per metre distance with the thicker cable you use between the amp and the XO, than with the thinner cable you can use between XO and tweeter.
anonymous member of the WBF said:Often external xover doesn't have anything to do with isolation of any kind but a larger internal cavity in the speaker cabinet for better bass response. Problem with the external xover is the additional lengths of wire and extra connectors needed.
* Ease of swapping individual components within said speaker/customizing/tailoring to suit one's preferences.
* With loss of vibrations, the values of the individual components retain a better consistency of proper operating performance.
* The ability to isolate said components just as one would with the rest of the gear.
What say you?
Tom
First off, I have been extremely busy so I am just now seeing this.Well to point 1 you have no idea what you are actually doing. In many cases what you are hearing are F/R changes which is fine but you have no idea what kind of impedance changes are occurring. Are they giving you a range of safe swaps or just leaving it up to you? If they are leaving it completely up to the user it's a bad idea.
That's why you use solder screws frankly suck as an electrical connection.
Can't hurt but in reality the most of this is in the noise floor.
Rob
Apologies Rob,Well to point 1 you have no idea what you are actually doing. In many cases what you are hearing are F/R changes which is fine but you have no idea what kind of impedance changes are occurring. Are they giving you a range of safe swaps or just leaving it up to you? If they are leaving it completely up to the user it's a bad idea.
That's why you use solder screws frankly suck as an electrical connection.
Can't hurt but in reality the most of this is in the noise floor.
Rob
It is the same 6.8 mH as the mundorf stock coil that it would replace but the copper foil hybrid version below has an impedance that is .1 ohm lower ie total .17 ohm rather than the .27 ohm for the stock inductor. Would this slightly different impedance be critical...
Hoping for some thoughts on this if possible. This is one of the potential inductors for the pair of OB woofers in the Pap horn that I’m considering for an upgrade in the planned external crossover. The info below suggests it would be ideal for high efficiency applications so the pap horns powered with SET seems a good potential fit.
It is the same 6.8 mH as the mundorf stock coil that it would replace but the copper foil hybrid version below has an impedance that is .1 ohm lower ie total .17 ohm rather than the .27 ohm for the stock inductor. Would this slightly different impedance be critical...
Info from the mundorf site...
Specifications:
Core material: FERON
Grain-oriented silicon iron 0.35 mm
OFC-Copper 99.997% pure
Our Zero Ohm Coil (ZOC)made from copper foil impressively combines the outstanding natural music performance of extremely low ohm Feron ZOC cores with the finely detailed musical texture and multifaceted richness of OFC copper foil.
These coils were specially developed for low frequency applications which do not focus on maximum capacity, but rather exceptional performance quality, micro-dynamics and outstanding technical properties such as matching perfectly with highly-efficient loudspeakers specially designed for low-power, single-ended tube-amplifiers.
Many thanks Folsom,Don’t change inductors unless you can match the resistance. The existing one probably has .5-2ohm of resistance (DCR). That resistance is part of the frequency response, parts of the crossover. Changing it will sound different because it’ll screw up the crossover a lot. So if you get a zero ohm inductor you’ll need to series it with a resistor equivalent to the existing inductors DCR. There are several more properties that may be very important, related to the DCR amount.
Thanks Rob,If you post a schematic I can run it in LEAP so you can see what the difference would be. I would have to use a standard load for the driver.
Rob
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