Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Which value resistor to use with piezo tweeter
Which value resistor to use with piezo tweeter
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 14th January 2003, 09:56 PM   #1
Bull is offline Bull  United Kingdom
diyAudio Member
Join Date: Oct 2002
Location: ...........
Default Which value resistor to use with piezo tweeter

Loads of people say different things.

The 3khz or 4 khz piezo horn needs a 2 watt or 3 watt 47 0hm resistor in series with it.
But i've got a piezo with a 22 ohm 2 watt resistor attached to it,and it is a 3.5 khz horn.
It really get on my nerves,why every person i've spoken to say something different.
Also people have said use an 8 ohm ceramic wirewound 10w or 20w instead of a 22 ohm 2w metal film resistor.
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.
And other people tell me i don't need a resistor for piezo tweeters at all,because it doesn't need a crossover.
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.
Also 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.
Also 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.

Most good piezos[CTS or Motorola] 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?
I know you can buy the Powerline piezo series with have an internal protection unit,handling wattages up to 200w rms,400w music.
But i've seen normal square [non protected] 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?
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 crossover
But if used with a good 18db 3rd order crossover,the compression drivers are probably safe from low frequency signals.
  Reply With Quote


Which value resistor to use with piezo tweeterHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Piezo tweeter help ivorcally Multi-Way 15 11th December 2017 09:10 PM
Piezo Tweeter for Dogs Gold_xyz Multi-Way 85 13th November 2017 07:46 PM
Piezo tweeter to my BIB? gychang Full Range 8 13th November 2006 05:28 PM
piezo tweeter resistor UNDERSTANDIN Multi-Way 4 23rd September 2005 08:37 AM
Piezo Tweeter confusion Bull Multi-Way 3 6th December 2002 12:08 AM

New To Site? Need Help?

All times are GMT. The time now is 08:50 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio