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-   -   piezo tweeters (http://www.diyaudio.com/forums/everything-else/209614-piezo-tweeters.html)

peter day 26th March 2012 08:03 PM

piezo tweeters
 
I love these cheap, simple to install and almost indestructible little squakers, but for me they have to finish off the upper-end in a home recording/practice setup (room about 20 by 30 feet) on top of high-powered HF horns.

My horns disperse no problem. The pezos I use just seem to get lost against these big brothers.

I have seen Klipsch use them in array patterns before for larger setups.

Has anyone out there had success in this area? Is it simply a matter of buying a dozen of them, or is there a product out there with higher levels of output?

p

Cal Weldon 26th March 2012 08:08 PM

Hi Peter,

There are those who can put up with piezos but they're not for me. To me you are much better off getting one good compression tweeter with high sensitivity over a bunch of piezos stacked together.

peter day 27th March 2012 02:35 PM

I have a choice of cheap, off off shore compression drivers from a number of local (Toronto) bargain electronics outlets

Some of them look a lot like JBL bullets. No product info with them though, and I'm not sure I would put much salt into them if they existed. On the other hand, they might be big bang for the buck knock offs. Not everybody respects design patents.

You're near a major ocean port, Cal. What interesting stuff have you seen fall off the boats out there?

6k to 12k or so will do for me. I run an active crossover at 24 db slope, but my high end is crossed currently at 800, sometimes lower. I have a gate and compressor/limiter at my disposal if that helps.

p

Cal Weldon 27th March 2012 04:47 PM

Quote:

Originally Posted by peter day (Post 2962143)
What interesting stuff have you seen fall off the boats out there?

You mean other than me? :D

peter day 29th March 2012 03:47 PM

I have seen my share of Pyle and Pyramid products at cheapy outlets. I thought you might have spotted what you consider to be a more credible brand I could look out for

p

Cal Weldon 29th March 2012 04:47 PM

Have a look in the Q components catalogue. I have ordered from them many times. Starting at page 37.

http://www.loudspeakers.ca/Qmedia/Qcat66.pdf

Price list:

http://www.loudspeakers.ca/Qmedia/Qc...il_2011V04.pdf

peter day 3rd April 2012 02:52 PM

Ya thats a good source buddy. Local to me as well!

peter

peter day 4th April 2012 04:12 PM

Ok Cal. Being a person who buys at the low end of buying trend-cycles, I just grabbed a Cerwin Vega HT 12-d passive sub (8ohm load) used for like, the price of a case of beer after chill charge.

Decent enough cast alluminum frame driver by home gear standards.

My question: I'm new to dual voice coil drivers. Is there a disadvantage to just wiring into one side of the driver. I have already gone in and bypassed the passive crossover on one side and feed an active eq'd signal to it with OK results.

Its not as effecient as I expected. My amp can easily handle a 4 ohm load which I know I can achieve by wiring changes, but, what is the upside to including the second voice coil other than an ohm differnce?

peter

Cal Weldon 4th April 2012 04:17 PM

The motor designed to have both coils driven. I know you can drive only one but I can't think of why you might want to, you will lose efficiency that way.

EDIT: I mean sensitivity.

peter day 5th April 2012 01:43 PM

the advantage for me of using just one voice coil is that it frees up the second one for use with another sound source without having to re-patch.

This way, I get to throw my active-crossover amp signal into a passive crossover-bypassed input, and my kid gets to use the other voice coil via the other channel (which still uses the original passive crossover).

Helps keep the peace at home by giving everybody something

p


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