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

Class D Switching Power Amplifiers and Power D/A conversion

Berihnger A800 full review, pictures INSIDE )
Berihnger A800 full review, pictures INSIDE )
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 12th November 2019, 10:09 PM   #1
daniboun is offline daniboun  France
diyAudio Member
 
Join Date: Nov 2019
Location: Lyon (France)
Default Berihnger A800 full review, pictures INSIDE )

Hi amigos,

This is probably the first shots of the Berihinger A800 Class D amplifier.
I heard lots of great reviews about this Amp and I tried to ask to Berihinger customer serice some info. about the audio chip : they were not allowed to share those technical informations. I also asked to Thomann in Germany but the same... this is like a secret )

So, I started the adventure and decided to share a little review.
Keep in mind that this review is based on my discerning musician ears. I have been playing drums for many years now and my father is classical guitarist as well. So that I can compare, I specify that I have several amps. (High end AB amp, TPA3255 Amp Purepath, TK2050 Tripath)

My equipments :

- Audiophile Audio Player
- Tube DK TP01 Preamp + Sylvania EBE6W NOS Tubes made in the USA
- HD Audio 24 Bit Playlist : Jazz / World Music / Voices Female + Male
- The Preamp is connected via XLR balanced inputs
- Hi ends Floors Speakers 3 way / 93DB @ 8 ohms handmade in France

Berihinger A800 spec :

Output circuit type Class-D
Circuit protection Short circuit current, DC fault, AC fuse, thermal cut
Distortion (4 Ω @ 150 W @ 1 kHz) <0.08 %
Damping factor >160 @ 8 Ω
Frequency response @ -10 dB below rated output power 20 Hz to 20 kHz, +0/-1 dB
Frequency response @ -3 dB 10 Hz to 30 kHz
Signal-to-noise >100 dB (A weighted, 20 Hz to 20 kHz)
Voltage gain @ level control max Balanced: 30 dB / RCA: 41 dB
Input sensitivity @ level control max XLR: +4 dBu / RCA: -10 dBV

Sound Stage :
Compared to my AB high end amplifier, I would say that the A800 has clinical or even a surgical sound, extremely well balanced with a formidable precision in the low ends. This is pretty typical with Class D amps but I have to admit that the balance between all the frequencies is quite exceptional ! Audio image is really great (this depends also on recordings and tubes)

Musicality :
The musicality is a little to the detriment of the accuracy of this class D Amp. Question of taste probably.... With the A800 you will really hear some suprising details (sliding guitar strings, articulations on the snare etc)... It is as accurate as the TPA3255 maybe better to my ears but a little less warm than my AB amp.

Dynnamics :
Excellent ! The music really live : the amp has a lot power. Listening is not tiring really amazing. The range of how gently or strongly are played the instruments is clearly noticeable.

Noise / Signal :
AMAZING ! absolutely dead silence between songs even with my Volume control @70%.

Conclusion :
For this price, I think it is impossible to Out perform this Class D amp.
For me it is clearly an Audiophile amplifier that performs as well as a 1000$ amplifier. Now let the scientif measures confirm this....

Pictures from inside and I will let the specialist analyze the electronic part )

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Last edited by daniboun; 13th November 2019 at 07:03 AM.
  Reply With Quote
Old 12th November 2019, 11:33 PM   #2
kipman725 is offline kipman725  United Kingdom
diyAudio Member
 
kipman725's Avatar
 
Join Date: Jun 2007
Location: Warrington
Send a message via MSN to kipman725
The pictures are tiny! any chance of testing maximum output into resistive loads?
  Reply With Quote
Old 13th November 2019, 06:58 AM   #3
daniboun is offline daniboun  France
diyAudio Member
 
Join Date: Nov 2019
Location: Lyon (France)
Quote:
Originally Posted by kipman725 View Post
The pictures are tiny! any chance of testing maximum output into resistive loads?
Hummm this comes from the site,
Click here for the big pictures and click into it :

<<REVIEW Berihinger A800 Class : Photos uniques !>> - 30100188 - sur le forum <<Amplificateurs Integres>> - 1030 - du site Homecinema-fr.com
  Reply With Quote
Old 13th November 2019, 07:05 AM   #4
daniboun is offline daniboun  France
diyAudio Member
 
Join Date: Nov 2019
Location: Lyon (France)
You should be better now for the images size )
  Reply With Quote
Old 13th November 2019, 11:14 AM   #5
kipman725 is offline kipman725  United Kingdom
diyAudio Member
 
kipman725's Avatar
 
Join Date: Jun 2007
Location: Warrington
Send a message via MSN to kipman725
mmm CapXon capacitors, they used to be awful and fail after two years but they may have got better. Not sure what type of power device they are using and how the heat sink clamp works but it doesn't look like it can dissipate much power so hopefully the circuits are very efficient. Power devices look to be a long way away from the gate drivers and components are arranged in an aesthetically pleasing way (grids) rather than a way positioning them for better performance. Looks mechanically well built though.
  Reply With Quote
Old 13th November 2019, 11:51 AM   #6
daniboun is offline daniboun  France
diyAudio Member
 
Join Date: Nov 2019
Location: Lyon (France)
Quote:
Originally Posted by kipman725 View Post
mmm CapXon capacitors, they used to be awful and fail after two years but they may have got better. Not sure what type of power device they are using and how the heat sink clamp works but it doesn't look like it can dissipate much power so hopefully the circuits are very efficient. Power devices look to be a long way away from the gate drivers and components are arranged in an aesthetically pleasing way (grids) rather than a way positioning them for better performance. Looks mechanically well built though.
You might be right. I played music with the A800 for 3 continue hours yerterday with my greedy speakers : No overheating to report. Seems that
the passive cooling system is effective
  Reply With Quote
Old 13th November 2019, 12:41 PM   #7
deChrLam is offline deChrLam  Switzerland
diyAudio Member
 
Join Date: Feb 2012
Driver irs20957s
Mosfet??? What is under the funny heat clips?


The layout has decoulping caps miles away from the pins in the ICs.
I guess they think it is important to organise the board in rows and columns and leave plenty of space between pins and caps for the labels.
  Reply With Quote
Old 13th November 2019, 02:40 PM   #8
MorbidFractal is offline MorbidFractal
diyAudio Member
 
Join Date: Nov 2017
Quote:
Mosfet??? What is under the funny heat clips?

...
Attached Images
File Type: png Screenshot from 2019-11-13 14-39-32.png (105.4 KB, 89 views)
  Reply With Quote
Old 13th November 2019, 03:41 PM   #9
kipman725 is offline kipman725  United Kingdom
diyAudio Member
 
kipman725's Avatar
 
Join Date: Jun 2007
Location: Warrington
Send a message via MSN to kipman725
Quote:
Originally Posted by MorbidFractal View Post
...
wow lovely low inductance package with the (slow) gate drive a mile away. At this rate I should design a class-D amplifier.
  Reply With Quote
Old 14th November 2019, 06:12 AM   #10
HemiRick is offline HemiRick  United States
diyAudio Member
 
Join Date: Feb 2015
I see this amp has "SmartSense Impedance Compensation
Our new SmartSense Technology puts the punch back into Class-D amplification, providing vastly improved full-range frequency response with more powerfully-dynamic bass, and smoother high-frequency reproduction. The resulting output is no longer dependent on the actual load, but is rendered perfectly ruler flat via impedance compensation. A800's design also incorporates a significantly-higher damping factor that yields better amplifier control over the loudspeaker for stronger audio reproduction – especially in the LF area."

Any comment on what this actually is? How it works? Or more BS?
  Reply With Quote

Reply


Berihnger A800 full review, pictures INSIDE )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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Full-Range enclosures inside subwoofer enclosure davidhozic Multi-Way 4 28th May 2019 07:48 PM
Serch for inside pictures from Trinnov Altitude32 dontknow2 Everything Else 0 3rd November 2018 11:49 AM
Is this transformer saturation? (pictures inside) funk1980 Tubes / Valves 22 22nd May 2013 11:16 PM
search pictures inside soundstream ref500s Ground Zero Car Audio 11 9th May 2010 03:40 PM
Crestaudio inside pictures teemce Solid State 1 7th October 2006 09:11 AM


New To Site? Need Help?

All times are GMT. The time now is 09:08 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki