I have fitted a 1% 2R7 metal film resistor that I already had, in series with the tweeter coil in place of the standard green wirewound (?) 2R2 resistor included in the priginal WD25TEx kit..
I quite like the results insofar as it´s a tad warmer sounding but it seems to have lost its pin-point imaging. Lead singers seem to come at you from nowhere in particular. Might this be down to the higher value or the different type of resistor ?
In other words, should I go for a 2R7 Mills or a 2R2 metal film to get back to where I was, but a bit nicer.
WD25Tex. What is this down to ?
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pre65
- Amstrad Tower of Power
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#2
Have you checked if the speakers are in phase ?
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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IslandPink
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#4
Metal films I find are not the best-sounding types. They also have more inductance than other types, for the same value, which might affect the crossover characteristics a bit . You might want to try another type of resistor at the same value. Mills are good though, non-inductive ( usually ) . With speakers the best I've found are the BI Industries planar power resistors from RS .
"Once you find out ... the Circumstances ; then you can go out"
#7
Are you replacing like wattage resistors for the originls?
For a tweeter I would not go any lower than a 5W rating and my preference would either be a Mundorf M-Resist 10W MOX or Jantzen 10W Superes. Both are designed specifically for speaker XO use. I find these better than the Mills MRA12 series wirewound.
If you go lower than a 5W you could blow your tweeter.
For a tweeter I would not go any lower than a 5W rating and my preference would either be a Mundorf M-Resist 10W MOX or Jantzen 10W Superes. Both are designed specifically for speaker XO use. I find these better than the Mills MRA12 series wirewound.
If you go lower than a 5W you could blow your tweeter.
#8
Surely you're more likely to blow the resistor, Colin?
Besides, for domestic use, I'd expect even a 1w resistor to survive so long as levels stay sensible. There's only a tiny fraction of the amplifier being dissipated in the high-frequency section (including the tweeter). If the power test at diyAudio is to be believed, most people are running at less than a watt per side. The HF section might be seeing 1/10th of a watt, most of which will be absorbed by the tweeter.
Of course, if you want to turn it up, +10dB sounds twice as loud and needs 10x the power, so components must be scaled accordingly.
Chris
Besides, for domestic use, I'd expect even a 1w resistor to survive so long as levels stay sensible. There's only a tiny fraction of the amplifier being dissipated in the high-frequency section (including the tweeter). If the power test at diyAudio is to be believed, most people are running at less than a watt per side. The HF section might be seeing 1/10th of a watt, most of which will be absorbed by the tweeter.
Of course, if you want to turn it up, +10dB sounds twice as loud and needs 10x the power, so components must be scaled accordingly.
Chris