Cts piezo tweeter drivers#
Cts piezo tweeter pro#
Cts piezo tweeter series#

Last but not Least, the only good thing about piezos compaired to compression drivers are: piezos are harder to blow up than compression drivers,and piezos don't need a crossover to stop low frequency signals.But compression drivers are much higher average SPL at 1w 1m,sound much pure and much more treble detail,they cost more,and are heavier,and need at least a high pass filter,better if used with a proper crossoverīut if used with a good 18db 3rd order crossover,the compression drivers are probably safe from low frequency signals.

Cts piezo tweeter series#

I know you can buy the Powerline piezo series with have an internal protection unit,handling wattages up to 200w rms,400w music.īut i've seen normal square Motorola/CTS piezos in an array box of about 10 piezos,used with very high power amps,and large bass bins,used in out door events,and they seem ok,and don't blow up,how come this is? Most good piezos are either 50w rms or 75w rms,if this was matched with a 300w rms bass driver,and driven with a 300w rms amp,wouldn't the piezo be in danger of blowing?

Cts piezo tweeter pro#

I'd like to know the truth,and the person who helps me out on this query must be experienced in pro audio,not just an idiot saying a random answer because thats what has happened to me before.The person has to explain why it needs that certain value resistor,not just presume it from what other people told him.Īlso does the CTS powerline series need another resistor like the normal unprotected piezos,because inside the CTS powerline housing is a tungsten bulb and a PTC resistor.Īlso piezo twweters,don't need a crossover to stop bass frequencies,as the nature of the piezo is it rejects low-frequency signals but would a crossover help the piezo handle high wattages without burn out. If the resistor is only there on a piezo,to stop the high resonating frequencies of modern amps damaging the piezo.Why does it need a 20w for example,when a 2w is sufficent.Īnd other people tell me i don't need a resistor for piezo tweeters at all,because it doesn't need a crossover. It really get on my nerves,why every person i've spoken to say something different.Īlso people have said use an 8 ohm ceramic wirewound 10w or 20w instead of a 22 ohm 2w metal film resistor. Once the resistor has been selected then chose the capacitor (if you want one) to suit the tweeter/resistor setup.ītw I saw some really poor quality ones recently, the cone was unsupported and so the whole thing was loose in the housing and really quiet, which makes me think that they may not all be equal.The 3khz or 4 khz piezo horn needs a 2 watt or 3 watt 47 0hm resistor in series with it.īut i've got a piezo with a 22 ohm 2 watt resistor attached to it,and it is a 3.5 khz horn. The way to stop this is to put a resistor 10-100 ohms in series with the piezos, so that is what the resistor is for and if chosen correctly can roll the hf off a bit. They don't need a crossover (although they sound a lot nicer with one, or just a simple high pass filter made from a single bi polar capacitor (trial and error is the best here)) because the impedance changes with frequency, the higher the frequency the lower the impedance, at low frequencies the impedance is very high, several thousand ohms, which is why no sound comes from them playing lows, as the frequency goes up the impedance drops until the crystal in the piezo starts to do some actual work and starts playing, if it sees very high frequencies, ultrasonic really, the impedance drops to a very low value, until it is a virtual short circuit and the crystal burns out. Piezo devices are actually rated by their voltage not watts like standard speakers, the motorolas were rated at 30v if I remember correctly which is why they were claimed to be for 100w systems (30v at 8 ohms) so if you took a couple and put them in series you had 60v, 3 was 90v etc. Two pieces of plastic that weighs less than a CD in it’s jewel case.Įdited by Elliot Thompson - 11 September 2009 at 11:11am The shipping ($29.00) is a outrageous for I would imagine the market value has gone up I remember when they would cost $3.00 each and, you could get themįor $2.50 if you bought quantity.

Squared-rectangular-shaped and, not a cinlinder. Ohm and, the colour favoured chalk used to write on a black board. If I remember correctly, the resistor was 50 The reason many would wire two in a series/parallel configuration to increase If you tried to feed them 100 watts they would burn up hence, Regardless what marketing claims, they were Purchased the rights to Motorola tweeters in the mid 1990s. 3.4' x 3.4' Piezo Tweeter 100W RMS power handling Originally designed by Motorola Frequency Response of 4.0k-27kHz Impedance: Appears as a. Those for sale may have stemmed from some oldĬabinets if, they are indeed made by Motorola and, not the company who CTS PIEZO TWEETERS, HF DRIVERS & HORNS: PIEZO HIGH FREQUENCY DRIVERS & HORNS: KSN-1142: Screw-on piezo tweeter/driver Powerful 400W RMS.

Another company purchased the tools from Motorola and continued to make Motorola stopped making Tweeters in the earlyġ990’s.