High efficiency = Increased dynamics ?! - Page 3 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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
Reply
 
Thread Tools Search this Thread
Old 29th October 2012, 11:09 PM   #21
cotdt is offline cotdt  United States
diyAudio Member
 
Join Date: Oct 2005
Send a message via AIM to cotdt
Quote:
Originally Posted by soundaatma View Post
Could you please tell me what is so special about the Peerless HDS tweeter compared to the similar but lower priced Dayton Audio RS28A-4 . Thanks.
These happen to be the 2 tweeters that I've used the most. I will give my subjective impressions. Compared to the Dayton RS28A4, the HDS tweeter is more airy (reproduction of artificial harmonics on a guitar) and has better dispersion off-axis. The soundstage on the HDS is wider (seems like the sound is coming from behind the speakers). The HDS tweeter just seems to disappear. Please note that the Peerless HDS has a rising frequency response whereas the Dayton dips down past 13kHz.

The HDS is also better than the Seas 27TDFC in terms of subjective detail and quickness. There seems to be more treble extension. It's a closer comparison as the material and frequency response is more similar between these two than the HDS vs Dayton.

Some of the difference is that the HDS is 25mm diameter so it is smaller than the other tweeters. The datasheet lists it as having lighter moving mass. Whatever the case, it just sounds great.
  Reply With Quote
Old 29th October 2012, 11:12 PM   #22
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi, Zaph|Audio , rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
  Reply With Quote
Old 30th October 2012, 01:08 AM   #23
diyAudio Member
 
Join Date: Oct 2010
Location: philadelphia
Quote:
Originally Posted by cotdt View Post
These happen to be the 2 tweeters that I've used the most. I will give my subjective impressions. Compared to the Dayton RS28A4, the HDS tweeter is more airy (reproduction of artificial harmonics on a guitar) and has better dispersion off-axis.
.
Thanks for the comparison. How low can these tweeters be crossed with a 2nd order crossover, before distortion starts.
  Reply With Quote
Old 30th October 2012, 01:16 AM   #24
diyAudio Member
 
Join Date: Oct 2010
Location: philadelphia
Speaking of high efficiency designs for home use, I wonder what is the reason for the rising popularity of the HE designs from Zu audio and Tekton ?? Did anybody listen to any of their HE designs.

I have not heard their speakers but have experimented with the same drivers they have used: Eminence BP102, 208 EZ, Fostex FE series etc.
  Reply With Quote
Old 30th October 2012, 01:17 AM   #25
cotdt is offline cotdt  United States
diyAudio Member
 
Join Date: Oct 2005
Send a message via AIM to cotdt
Quote:
Originally Posted by soundaatma View Post
Thanks for the comparison. How low can these tweeters be crossed with a 2nd order crossover, before distortion starts.
Sreten's link to Zaphaudio will give you an idea. It depends on how much power you need. You can even use it without a crossover as it naturally starts rolling off at 2kHz.
  Reply With Quote
Old 30th October 2012, 08:45 PM   #26
Squeak is offline Squeak  Denmark
diyAudio Member
 
Squeak's Avatar
 
Join Date: Jul 2007
Location: Frederiksberg
Quote:
Originally Posted by cotdt View Post
Sreten's link to Zaphaudio will give you an idea. It depends on how much power you need. You can even use it without a crossover as it naturally starts rolling off at 2kHz.
Wouldn't it get damaged by lower frequencies, let alone sound terrible?
  Reply With Quote
Old 30th October 2012, 08:59 PM   #27
cotdt is offline cotdt  United States
diyAudio Member
 
Join Date: Oct 2005
Send a message via AIM to cotdt
Quote:
Originally Posted by Squeak View Post
Wouldn't it get damaged by lower frequencies, let alone sound terrible?
No, it won't distort or get damaged at normal listening volumes without a crossover. I've tested this. Distortion was measured to be lower than other tweeters WITH a filter.
  Reply With Quote
Old 30th October 2012, 09:09 PM   #28
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

Using any tweeter without any high pass filter at all is a complete no-no.

Distortion will be very poor, the 12dB/octave roll-off = constant excursion
per octave, so it it will excursion limit due to bass, meanwhile producing
buckets of unnecessary intermodulation distortion, and is almost certain
to fry for any decent overall power level applied, a complete non-starter.

Flea power you might get away with it, but still pretty pointless.
A series capacitor is the minimum for any sensible design.

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow

Last edited by sreten; 30th October 2012 at 09:15 PM.
  Reply With Quote
Old 30th October 2012, 09:16 PM   #29
cotdt is offline cotdt  United States
diyAudio Member
 
Join Date: Oct 2005
Send a message via AIM to cotdt
All I will say is that I've done distortion measurements on the HDS tweeter and it worked fine even without a filter. In fact, distortion was very low. Now, at higher levels, sreten may be right. Who knows. I don't like to waste my time theorycrafting either way. I used a filter and crossed at 2.5 kHz in the final speaker. But the peace of mind I get from doing distortion measurements, that's something.
  Reply With Quote
Old 30th October 2012, 09:36 PM   #30
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Quote:
Originally Posted by cotdt View Post
All I will say is that I've done distortion measurements on
the HDS tweeter and it worked fine even without a filter.
Hi,

Not at 100W programme with mild clipping, or any sort of intermodulation
distortion testing. Your the person wasting peoples time saying something
works when it doesn't and wasting peoples time with "theorycrafting ".

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Active high dynamics/SPL & high performance loudspeaker system for my living room…! Robert GS Multi-Way 77 30th December 2012 10:39 AM
Power supply:Universal AC input/ Full range,High Efficiency, and High reliability hang Vendor's Bazaar 12 24th July 2009 03:46 AM
Low wattage, high efficiency, high quality? Nordic Multi-Way 5 4th September 2005 11:12 PM
High Efficiency, High Power Handling? Bogie Multi-Way 3 2nd July 2005 05:49 AM
Suggestions for high efficiency high SPL kit/design Kanga Multi-Way 50 23rd May 2003 12:52 AM


New To Site? Need Help?

All times are GMT. The time now is 01:03 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2