Capacitors

[Fuzz]

It is my understandiong you an add a capacitor (bass blocker) to a speaker to block unwanted frequencies on the lower end. I put a 47uf capacitor on some stock 2" speakers in my dash to start blocking below 600hz. They came with 3.3uf which was is around 12khz and I wanted to let them play more into the mid range. It was just a $3 experiment, but the results showed potential. It helped bring the staging up from my legs to the dash board area. I would like to try with better speakers now to see if I can better the results. So, can the same be done on the high end. Something like taking a 2" full range speaker and having it respond between 600 hz and 3500 hz without a crossover. If so, how?

I am not installing a processor or crossover, so please do not suggest this.

And I know I could let them roll off naturally, but my curiosity will not be satisfied with that alone.

[Wicks]

Capacitors exhibit a "high" impedance at "low" frequencies and "low" impedance at "high" frequencies.

"I am not installing a processor or crossover, so please do not suggest this."

Sorry...you already did install a crossover.

A series capacitor is a 6dB/octave first order crossover.

Passive crossovers are combinations of resistors, caps and inductors. Active crossovers are implemented with powered electrical circuits (op-amps/digital/etc).

In order to bandpass your 2" speaker, you'll need a bit more complicated circuit then just a capacitor.

http://www.electronics-tutorials.ws/filter/filter_4.html

[Fuzz]

I realize I am making a crossover. I just hate when people start suggesting things without completely reading the question.

The link you presented me with is very insightful, thanks. But, WHAT?

So for the low end you solder in a capacitor, easy enough. Is there not jusr another capacitor I can use for the high end?

[Krakin]

You can mess around with this simulator, there are some filters/crossovers pre-programmed into it.

http://www.falstad.com/circuit/

[TheMonolith2001]

I couldn't get that link to work. But it was probably something like this:

http://ccs.exl.info/calc_cr.html

[Stephen13]

A single capacitor makes a 1st order high-pass filter. It attenuates the lows and passes the highs. If you want to attenuate some of the highs also it will require at the very least an inductor which creates a 1st order low-pass filter. NOT another capacitor. In order to attenuate the lows AND highs together requires a band-pass filter. An example would be a filter that has a pass-band (band of frequencies allowed to pass thru the filter) of say 500Hz to 5kHz. The capacitor will block frequencies below 500Hz and the inductor will block the frequencies higher than 5kHz.

[Fuzz]

Thanks