Cheap Amplifier=tweeters

[h90]

Today I bought a 200 Watt amplifier and for testing two tweeter speaker.

I want to use it for my bird nest farm.

The amplifier tells 4-16 Ohm and has connections for real big wires.

The tweeter has 8 Ohm and I want to connect maybe 30 pc, how do I wire them that the Ohm are ok?

What cable to use and how to do the soldering smart?

The guide tells that + and - must be correct. But the tweeter have no writing and 3 contacts (what is the third one??)/

I can post pictures if necessary

Please help

[Spoonman]

Thats gunna be tricky.

If you wire them up as sets of 4 tweeters in a series/parallel combo this will be an 8ohm load.

Then series/parallel wire them to the amp you should have a presentable 8ohm load, in other words pretend your 4 sets above wired in series/parallel are an individual speaker, this will require another 2 tweeters to make a total of 32 (16 on each amp channel).

please post a pic of the tweeter, im not sure what the third contact is.

Edited May 23, 2010 by Spoonman

[Tywais]

You also need a crossover as the low frequencies can easily blow the tweeters out.

[h90]

Thats gunna be tricky.

If you wire them up as sets of 4 tweeters in a series/parallel combo this will be an 8ohm load.

Then series/parallel wire them to the amp you should have a presentable 8ohm load, in other words pretend your 4 sets above wired in series/parallel are an individual speaker, this will require another 2 tweeters to make a total of 32 (16 on each amp channel).

please post a pic of the tweeter, im not sure what the third contact is.

Thanks, I understand that, but I worry it will be a terrible headache to do. Can it be done in any way...Lets say I do 6 pcs serial and put 6 sets of it parallel? Which should also has the right ohm (8*6/6=8) or is there any disadvantage? I also read that people put capacitors between +(I think it was +) and the speaker. The tell the sound will be more crisp????? Any idea on that?

I made a picture. There are 2 contacts on the bottom (but no mark which is + or -), close to the left bottom contact is a scratch, which may look like a minus, but on the second tweeter there non, so it might be just a random scratch.

Thanks

Michael

[h90]

You also need a crossover as the low frequencies can easily blow the tweeters out.

What is a crossover?

I use it for birds twitters (spelling??) I think there is no heavy bass on that, I think (even I am not sure) there will be mostly higher frequencies.

[Tywais]

You also need a crossover as the low frequencies can easily blow the tweeters out.

What is a crossover?

I use it for birds twitters (spelling??) I think there is no heavy bass on that, I think (even I am not sure) there will be mostly higher frequencies.

The problem is if you make a mistake and turn on some heavy metal ... A crossover is used to split the frequencies out to the different speakers, woofer, mid range and tweeter. Your comment above regarding a capacitor is effectively a cheap mans filter, normally would use an inductor & capacitor if a full crossover. The capacitor will limit it to the higher frequencies if it is in series.

[h90]

You also need a crossover as the low frequencies can easily blow the tweeters out.

What is a crossover?

I use it for birds twitters (spelling??) I think there is no heavy bass on that, I think (even I am not sure) there will be mostly higher frequencies.

The problem is if you make a mistake and turn on some heavy metal ... A crossover is used to split the frequencies out to the different speakers, woofer, mid range and tweeter. Your comment above regarding a capacitor is effectively a cheap mans filter, normally would use an inductor & capacitor if a full crossover. The capacitor will limit it to the higher frequencies if it is in series.

Aha.....now many things start to make more sense.....I read that it also makes the tweeter live longer, which I understand now. In my minimal understanding of electric I understand that the capacitor simply doesn't has enough electrons available to forward that big "wave" of bass.

As well I always saw the deep frequencies on the equalizer turned down.

[Tywais]

Here's a chart to see the crossover frequencies versus capacitor size.

Speaker crossover chart

As a college student I worked at a high end stereo shop as a repair technician making a few extra bucks so picked up a fair amount of knowledge in the meantime.

[h90]

another question:

I read that the sound is between 1-6 khz with most of it between 2-5 khz.

One of the tweeter I saw in the shop was rated at 4000-20000 Hz. Which would be complete wrong, or?

Many speak about tweeter with piezo technology instead of coils. has it any advantages?

Where to go in Bangkok to buy these tweeters?

Tywais: thanks for the chart...I understand that, now

[Tywais]

another question:

I read that the sound is between 1-6 khz with most of it between 2-5 khz.

One of the tweeter I saw in the shop was rated at 4000-20000 Hz. Which would be complete wrong, or?

"The normal range of hearing for a healthy young person is 20 to 20,000 Hz; hearing deteriorates with age and with exposure to unsafe volume levels."

"Most human speech communication takes place between 200 and 8,000 Hz and the human ear is most sensitive to frequencies around 1,000-3,500 Hz."

So what they are referring to above is the frequency of the human voice. An example, phones (fixed line - not mobile) do not have much of a high or low frequency response. Tweeters should be able to hit 20 kHz though cheaper ones won't.

//edit - BTW, the above range would be for the mid range speakers. Woofers from around 10 Hz up to a few hundred Hz then mid range then crossover to the tweeter frquencies.

[h90]

another question:

I read that the sound is between 1-6 khz with most of it between 2-5 khz.

One of the tweeter I saw in the shop was rated at 4000-20000 Hz. Which would be complete wrong, or?

"The normal range of hearing for a healthy young person is 20 to 20,000 Hz; hearing deteriorates with age and with exposure to unsafe volume levels."

"Most human speech communication takes place between 200 and 8,000 Hz and the human ear is most sensitive to frequencies around 1,000-3,500 Hz."

So what they are referring to above is the frequency of the human voice. An example, phones (fixed line - not mobile) do not have much of a high or low frequency response. Tweeters should be able to hit 20 kHz though cheaper ones won't.

//edit - BTW, the above range would be for the mid range speakers. Woofers from around 10 Hz up to a few hundred Hz then mid range then crossover to the tweeter frquencies.

hmm strange....when these bird sounds are between 2000 (1000) and 5000 (6000) Hz, why do they all go with tweeters only. mid range speakers would more logic.

Maybe they use the tweeter just because of the size (many sources of sound simulate that there are already many birds around). I found out that PK Speaker are made in Thailand but no specifications available.....

[astral]

I made a picture. There are 2 contacts on the bottom (but no mark which is + or -), close to the left bottom contact is a scratch, which may look like a minus, but on the second tweeter there non, so it might be just a random scratch.

Thanks

Michael

Don't let the lack of the plus and minus worry you, it is only a relative concept.

Just decide in your mind which is plus, say the right hand terminal,

and stick to that convention when you do the wiring.

[h90]

I made a picture. There are 2 contacts on the bottom (but no mark which is + or -), close to the left bottom contact is a scratch, which may look like a minus, but on the second tweeter there non, so it might be just a random scratch.

Thanks

Michael

Don't let the lack of the plus and minus worry you, it is only a relative concept.

Just decide in your mind which is plus, say the right hand terminal,

and stick to that convention when you do the wiring.

OK, thanks!

I did that already....if it is only a coil it should not matter as long as all speaker "move" in the same direction.