| taming the piezoelectric [message #43880] |
Sun, 08 February 2004 21:39  |
wasteh202
Messages: 137
Registered: May 2009
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Master |
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I have a pair of the 2Pi towers. I like allot of things about this speaker. It is a great value for the money, and give a terrific range of music without comprimise by an XO, the bass is strong and low.
But, my one complaint is the piezoelectric by Motorola is too fatiging for my ears. I would rather not use tone control or an equalizer in the chain to augment the sound. Is there any way that I can tame this horn some that will take some of the edge off ? I have read about some tweaks to the KSN1038.. but can not seem to find what I am looking for.
I have other speakers (planar and box) that I can listen at the same or louder decibels without fatigue, but this speaker will not allow me to listen at high volumes without turning down the music after a short time.
I would really like to keep them, but if I do not arrive at a solution to this problem they may go up for sale.Anybody ? .... thanks.
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| Re: taming the piezoelectric [message #43882 is a reply to message #43880] |
Mon, 09 February 2004 07:17  |
GarMan
Messages: 960
Registered: May 2009
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Illuminati (2nd Degree) |
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Putting a resistor across the binding post or a cap in series with the tweeter will both tame the piezo, but in different ways. I found that the cap will attenuate the piezo, while the resistor "mellows" it out. Values you may want to try are:
0.1uF for -6dB
0.3uF for -3dB Try a 50, 22, or 12 ohm resistor across the binding post for a small, medium and large "mellow" effect. Gar.
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| Re: taming the piezoelectric [message #43887 is a reply to message #43881] |
Mon, 09 February 2004 10:16 |
wasteh202
Messages: 137
Registered: May 2009
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Master |
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Thanks for the tips on the peizoelectric horn. I did not know about these tweak modifications, and I will try them. I was actually thinking of tweaking the horn itself. Like adding mass to the back of the horn or opening the horn and treating the paper with something. I remember reading about these tweaks but do not remember the specifics. I do know if these physical horn tweaks will get the exact change that I am looking for, and neither do not know exactly how to do them... but... I will at least attempt the mods with the resistors. Thanks much to GarMan and Gumby
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| Re: taming the piezoelectric [message #43888 is a reply to message #43887] |
Mon, 09 February 2004 11:10 |
jlharden
Messages: 94
Registered: May 2009
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Viscount |
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Hi waste, I had good results with damping the back side of the piezo with mortite. I don't know if this will do what you are wanting though. There was also talk of disassembling the tweeter and using dammar varnish on the diaphram. If I recall correctly, this was from the single driver website where the Motorola piezo's get a decent amount of use. I haven't tried this and probably won't. The biggest difference in sound came when I switched from a pretty good quality solid state amp to a better push pull pentode amp. Better bass, midrange, and highs. Really transformed this speaker. I think the sound could be characterized as a warm, full bodied sound with hifi characteristics, yet possesing drive and dynamics not typically found in "hifi" speakers. In a nutshell: great sound with plenty of balls!
Good luck with your speakers and keep us posted. Jerrod
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| Re: taming the piezoelectric [message #43889 is a reply to message #43888] |
Mon, 09 February 2004 14:10 |
wasteh202
Messages: 137
Registered: May 2009
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Master |
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I may well change my amp for these speakers. I am using SS amps with them is this is likely part of the problem. I was using some Heathkit 4W-AM push/pull 20w monoblocks... but the sound was very bloated and unclear... much worse than the SS amps, perhaps the tubes... I'm not sure. I will likly sell the Heathkit amps and look for some Bottlehead or Decware tube amplicication. I will also attempt to treat the piezoelectric horn as you have stated and check to try to find the website that can tell me more about altering the inside of the horn... Thank to all..
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| Re: taming the piezoelectric, attn: Bill Epstein [message #43894 is a reply to message #43889] |
Tue, 10 February 2004 07:54 |
jlharden
Messages: 94
Registered: May 2009
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Viscount |
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Hello again, I really like the push pull amp on horns. I've got tube power with a very big sounding 60 w/channel. I haven't heard the small signal tube amps on the 2 Pi's so I can't comment. My gut feeling is I'd like the sound, but crave the dynamics of the much more powerful push pull amps. I believe Bill Epstein has used both on Pi's, perhaps he'll comment. Either route should make great sound and warm up the room a bit! Good luck to you. Jerrod
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