Is it recommended to use NP caps in xovers which ask for big value caps in the woofer section?
1. What about the sound quality as compared to MKP or other usual Caps used?
2. If they blow (being small in size) is there a risk that the driver speakers blow simultaneously?
I will need to use 68uF in series with the woofer and 82-100uF for the mid. Any advice an example of such cap can be viewed as attachment.
1. What about the sound quality as compared to MKP or other usual Caps used?
2. If they blow (being small in size) is there a risk that the driver speakers blow simultaneously?
I will need to use 68uF in series with the woofer and 82-100uF for the mid. Any advice an example of such cap can be viewed as attachment.
Attachments
My amp is rated at 50 w /8 ohms per channel, and printed on the cap as follows; 35 VAC. Will that do?
p.s just read on the datasheet
LSC-330NP
Bipolar electrolytic capacitor, 33 µF
p.s just read on the datasheet
LSC-330NP
Bipolar electrolytic capacitor, 33 µF
- Voltage stability: ˜ 35 V/ DC 100 V, 150 W/8 Ω, 300 W/4 Ω
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I have read somewhere that there is need to add in series a small polyester or MKP MKT cap with the NP cap . I do not remember the reason why. Is that true?
If electrolytic capacitors are the only feasible type for your low frequency XO, then you'd surely be much better off with an active XO or DSP for that freq (the mid-range and tweeter can be OK on the same amp together and a passive XO for them).
Electrolytic capacitors have widely inexact values and also age. Like using duct tape on a water leak.
B.
Electrolytic capacitors have widely inexact values and also age. Like using duct tape on a water leak.
B.
Not in series!
Maybe in parallel, but do the Math; a 0.1 capacitor in parallel with 10uF (for example) will do little to nothing at any conceivable Audio frequency.
Maybe in parallel, but do the Math; a 0.1 capacitor in parallel with 10uF (for example) will do little to nothing at any conceivable Audio frequency.
I sincerely once want to know why too many doubts and worries about capacitors, coupling, decoupling, PSU and the like. Someone created a monster that none can stop now, and this issue appears again and again ad infinitum.
Definitively, any good textbook treates the components characteristics. It is well know any active and passive is a certain combination or mix of the three main elements known in electonics: capacitance, inductance and resistance. In active elements (Tubes, MOSFETS, OPAMPS) we add certain ideal voltage and current generators in order to evaluate its behavior.
Each manufacturer, each kind of technology includes different amounts of such three elements. It is unavoidable.
In the orher hand, when speaking about technologies, words or phrases like "sound better", "sound clear", " sound romantic" are completely meaningless. No good capacitor may sound per se, otherwise it implies it is mechanically deffective. Some inductors may "sound" because of mechanical vibration of iron and copper and magnetostriction in the core, but no one capacitor must sound.
Lets try to kill the monster once forever.
Definitively, any good textbook treates the components characteristics. It is well know any active and passive is a certain combination or mix of the three main elements known in electonics: capacitance, inductance and resistance. In active elements (Tubes, MOSFETS, OPAMPS) we add certain ideal voltage and current generators in order to evaluate its behavior.
Each manufacturer, each kind of technology includes different amounts of such three elements. It is unavoidable.
In the orher hand, when speaking about technologies, words or phrases like "sound better", "sound clear", " sound romantic" are completely meaningless. No good capacitor may sound per se, otherwise it implies it is mechanically deffective. Some inductors may "sound" because of mechanical vibration of iron and copper and magnetostriction in the core, but no one capacitor must sound.
Lets try to kill the monster once forever.
people worry about 'monsters' because of their own insecurities.
in this day of everything interconnected and searchable with your fingertips.
why would anyone ever decide to do their own research when they can just ask the heard.
my utter belief is that people have become so, de evolved, because they have not been shown or taught how to think for themselves.
and each year, they release more rocket surgeons on to the population.
they are taught how to make the most complex things, but not how to think for themselves.
or even question why or how.
why do they put inscriptions on plastic bags that state.
"This is not a toy - Suffocation hazard"
Please, let them find this out for themselves.
It is how we are supposed to learn.
how many even know what 'N.P.' stands for ?
How many more ask which way does a N.P. capacitor get wired.
Or a resistor or inductor for that matter.
so many devices are murdered because the simple + - symbols are unknown or understood by the unwashed masses.
in this day of everything interconnected and searchable with your fingertips.
why would anyone ever decide to do their own research when they can just ask the heard.
my utter belief is that people have become so, de evolved, because they have not been shown or taught how to think for themselves.
and each year, they release more rocket surgeons on to the population.
they are taught how to make the most complex things, but not how to think for themselves.
or even question why or how.
why do they put inscriptions on plastic bags that state.
"This is not a toy - Suffocation hazard"
Please, let them find this out for themselves.
It is how we are supposed to learn.
how many even know what 'N.P.' stands for ?
How many more ask which way does a N.P. capacitor get wired.
Or a resistor or inductor for that matter.
so many devices are murdered because the simple + - symbols are unknown or understood by the unwashed masses.
sorry. Yes a s
Sorry.Corrction I read that a small cap must be soldered in parallel with the big NP cap.
The question whether you can learn anything after suffocation depends on whether there is an afterlife, and is therefore religious.
I just opened my bookchelf speakers JBL E20 Northbridge speaker and found that JBL uses only such NP caps in the xo (9 uF bass and 5uF tweeter)
His 50W into 8R amp probably works on ±35V rails (if it is a chip-amp) or even more. I'd go for higher voltage caps, for the peace of mind.
But in the speakers outputs, only speaker voltage and current are important. Rail voltages is an internal problem of the amplifier. You can do it with +/- 35V or +/- 4000V if you want, but while the amp gives 20V and 2.5A rms, a 35V cap suffices. Moreover considering musical program where full peak voltage is sporadic. And I doubt the guy uses 50W all the time. Probably 3 or 4W no more.
Many years ago I experimented with trying to hear the difference between polypropylene, mylar, and non-polarized electrolytic caps in a tweeter circuit.
https://www.diyaudio.com/community/...est-brand-100-volt-8-2uf.353984/#post-6192931
I wanted to hear a difference between the mylar and the polypropylene, but I could not. The NP electrolytic, on the other hand, did have a "sound", a negative impact.
j.
https://www.diyaudio.com/community/...est-brand-100-volt-8-2uf.353984/#post-6192931
I wanted to hear a difference between the mylar and the polypropylene, but I could not. The NP electrolytic, on the other hand, did have a "sound", a negative impact.
j.
@ op :if you have not the tool to measure capacitance of the caps, just go for mkt or mkp with 5% precision minimum. SCR or Jantzen or monacor first prices are cheap enough. electrolythic NP for speakers have easily till 10/15% precision only whatever the % claimed by the brand.