Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

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 9th October 2007, 06:41 PM   #11
diyAudio Member
 
Join Date: Nov 2005
Location: Southern Germany
Hi Folks,

Calvin i fully agree !

take a look here, unfortunately just german language.

www.hifiakademie.de

Capaciti
  Reply With Quote
Old 9th October 2007, 06:45 PM   #12
Few is offline Few  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Maine, USA
Thanks for the info Calvin. Now I just need to brush up on my German so I can read their site (it will actually take more than a brushing up...). I've emailed HiFi Akademie to ask if they have any information for those of us who are linguistically challenged. I've found the online language translations to be pretty cumbersome. I sure wish I had paid more attention in my German classes all those years ago!
  Reply With Quote
Old 9th October 2007, 06:45 PM   #13
diyAudio Member
 
Join Date: Aug 2007
Default OT Warning

Calvin, I read somewhere that H-A will also have a project with DSPs. Do you know anything about this?

<dreaming>

I would be overjoyed if H-A would do a class-D with integrated DSP.

I.e. digital in, EQ and Xover with DSP then feed digitally into a class-D.

</dreaming>
  Reply With Quote
Old 9th October 2007, 06:49 PM   #14
Calvin is offline Calvin  Germany
diyAudio Member
 
Calvin's Avatar
 
Join Date: Nov 2004
Location: close to Basel
Hi,

I know nothing definite, but as You said, a digital crossover module is said to be short before release.

jauu
Calvin
  Reply With Quote
Old 9th October 2007, 07:49 PM   #15
diyAudio Member
 
Join Date: Nov 2005
Location: Southern Germany
Hi Folks,

in germany its not a secret that Capaciti works together with HiFiAkademie.

I have some information about the upcoming (in November) DSP-modul:

1. 2 analog inputs, 2 analog outputs
2. The DSP is rather small since it got no own power supply.
3. The modul can only be used in combination with their Preamp or poweramp. You just stick it into an excisting slot, thats it
4. I have moduls in use in my company for testing. I need to say that the outstanding options of such moduls by far exceed the possible losses, which people mention when discussing about A/D - D/A conversion.
5. Using DSP for "standard" loudspeakers is fine, using it for ESL is the perfect match.
6. For example our "Element 160" which is a small Fullrange ESL shows a fundamental resonance between 35 -40 Hz. And as a principle of small baffle width and limited membrane area ii plays "lean" in the lower midrange. Using the Dsp you lift the lower midrange resulting in significant more volume and body. In addition you set a perfect notch to the resonance, which will increase max soundpressure significant.
7. You connect the modul to the parallel port of a PC and do the programming by software. It shows you anything and you can load excisting graphs of measurements.

Out of my experience there are DSP's which really compromise sound quality at all, but the HiFiAkadamie is close to just a wire connection of components!

It might appear that i "glorify" their components due to my business connection, but if you would read all the feedbacks in different german web-chats, you will know why.

Capaciti
  Reply With Quote
Old 10th October 2007, 07:22 AM   #16
diyAudio Member
 
Join Date: Aug 2007
Thanks Capacity,

Considering that a class-D amplifier is not really a D/A converter, having the DSP as a drop-in solution seems ok to me.
[Note: A feedback loop in the class-D would necessitate an A/D if it were to use a digital input]

A DSP in a class-D sounds great. I am looking for something like that but will wait for november :-)
  Reply With Quote
Old 10th October 2007, 05:47 PM   #17
diyAudio Member
 
Join Date: Feb 2001
Location: Columbia, SC
Default Re: amplifier class

Quote:
Originally posted by willyhoho
I am looking for a amp to drive my esl. I am confused when looking in this forum as to the class designation the amp should have. Can someone please clarify this? Do tube amps have different classes too?
Thanks

It appears that this thread has accumulated a great deal of speculation, but not much in the way of actual response to the original questions.
1) There's not a class that an amplifier "should" have in order to drive electrostatic speakers. Any of them can do the trick.
2) The most common classes are A, AB, B, and D. Yes, there are others, but those four cover 99.999% of the commercial amplifiers on the market. In case you were wondering, yes, there is a class C, but it's only of use for radio transmitters; it's not something you'd want to use as a high fidelity amplifier.
3) Tube amplifiers have classes, too. A, AB, and B. It's technically possible to have a class D tube amp, but why on Earth would you want to?
4) Class A is the best from all sonic points of view, but it runs much hotter, is larger and heavier, and costs more.
5) Class AB and class B each have their adherents, but they argue endlessly over the crossover distortion (when one set of devices hands the signal over to another set of devices and turns off) and other technical points that may or may not interest you. In general, it's better to have as much class A as you can get, so in a race between a class AB amp and a class B amp, I'd favor the class AB.
6) Class D? Well, let's see, they're lightweight, often cheaper, run cooler...and there we run out of benefits. Sound quality? If you put music in, sound will come out, but I don't know of a single critical listener who would take a class D over A, AB, or even B. The technology just isn't ready for prime time. On the other hand, if you're just looking for a lot of cheap watts so you can get loud, maybe they're the ticket. But if someone gave me one, I'd use it for background music in my shop, not in my audio system.
7) DSP is conceptually seductive, but not quite ready for high end use. The same thing can be accomplished with analog circuitry, albeit with a little more work on the part of the user.
8) Class D and DSP together? Shudder... I've got sandpaper in my shop. It would be cheaper and simpler to scrub my ears with 100 grit rather than go to all the trouble and expense to put those two together in a high fidelity system.

Grey
  Reply With Quote
Old 10th October 2007, 08:44 PM   #18
Few is offline Few  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Maine, USA
In case other non-German speaking audiophiles are considering the class-d Hi-Fi Akademie products to drive their ESLs I thought I'd pass on the response I received from them when inquiring about product information in English. Perhaps others with more experience with the amps can offer an opinion about whether they would be a reasonable option even without access to the information. Based on this response it doesn't sound promising.

Quote:
I have all documentation in German only. Currently I have no plans to make an English version available. Whilst I could provide you with a price list and brief product information, this would probably not help much because you would also need the remaining information to actually build and operate the amps.

Thank you for your interest and apologies that I cannot help you further.
Best regards
Hubert Reith
  Reply With Quote
Old 24th October 2007, 03:49 PM   #19
diyAudio Member
 
Andersonix's Avatar
 
Join Date: Jan 2004
Location: Silicon Valley
If they made everything available in English, they would experience explosive growth in interest, and that would kill their reputation from the negative word-of-mouth due to the backlog. A fledging company needs very controlled expansion, so let's give them some time...

Or is there more behind their reasoning? (This goes for Capaciti-DIY also?)
  Reply With Quote
Old 25th October 2007, 04:43 PM   #20
Few is offline Few  United States
diyAudio Member
 
Join Date: Apr 2004
Location: Maine, USA
Emails and postings are notoriously easy to misinterpret. In fact, I may be misinterpreting Tosh's. Just to be clear, it was not my intent to impugn the folks at Hi-Fi Akademie. They responded politely and promptly to my question and I'm sure they have good reasons for their policy. I was just passing on the message I received from them in the hope it might save someone else the trouble of emailing Hi-Fi Akademie---and save Hi-Fi Akademie the trouble of responding again.
  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
Class D Vs Class I (Balanced Current Amplifier) rmsaudio Class D 29 26th January 2014 10:25 PM
Class A Amplifier Jean-Paul_2 Solid State 22 21st June 2009 02:36 PM
Questions about how to decrease the PASS A-40 amplifier into a class AB amplifier. novtango Pass Labs 2 21st October 2002 01:50 AM


New To Site? Need Help?

All times are GMT. The time now is 03:00 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