I just reviewed the Dayton Audio APA1200DSP amplifier. This is a teardown of the same. A few screws hold the top after which we see all of its bits:
[click on image for larger size].
Everything seems to be custom design. The large board has a front-end switching power supply which then powers the stereo class D amplifier. Based on size of the parts, it doesn't seem like it can pump out 1,200 watts of amplification.
I did not like that the power supply rectifier was glued to the electrolytic capacitor next to it. In switching supplies, these rectifiers get very warm and you don't want it to cook the capacitor.
Nice to see high voltage wiring clearly kept away from signal wires. The chunk of heatsink in the middle with side fins is much better than typical Hypex amplifier builds. On top of that you have a fan so this thing should run pretty cool.
Speaking of the capacitor, the brand name is "Jamicon." Not exactly a top brand capacitor although it tries hard to associate with them using that "con" ending.
The board on the top left is the main brains handling DSP functionality, codecs and such. Here is a more focused image:
Analog devices ADSP-21479 DSP handles computing jobs. See https://www.analog.com/en/products/adsp-21479.html
A pair of Cirrus Logic CS4270 "codecs" (ADC and DAC) handle conversion to and from analog domain: https://www.cirrus.com/products/cs4270/
DAC THD+N spec is 87 dB SINAD. ADC is better at 95 dB.
Conclusions
Interesting to see a full custom solution in this amplifier. This has not come cheap unless they expect huge volumes. Parts quality is average but construction is above average compared to homebrew module based amplifiers we see around.
-----------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/
[click on image for larger size].
Everything seems to be custom design. The large board has a front-end switching power supply which then powers the stereo class D amplifier. Based on size of the parts, it doesn't seem like it can pump out 1,200 watts of amplification.
I did not like that the power supply rectifier was glued to the electrolytic capacitor next to it. In switching supplies, these rectifiers get very warm and you don't want it to cook the capacitor.
Nice to see high voltage wiring clearly kept away from signal wires. The chunk of heatsink in the middle with side fins is much better than typical Hypex amplifier builds. On top of that you have a fan so this thing should run pretty cool.
Speaking of the capacitor, the brand name is "Jamicon." Not exactly a top brand capacitor although it tries hard to associate with them using that "con" ending.
The board on the top left is the main brains handling DSP functionality, codecs and such. Here is a more focused image:
Analog devices ADSP-21479 DSP handles computing jobs. See https://www.analog.com/en/products/adsp-21479.html
A pair of Cirrus Logic CS4270 "codecs" (ADC and DAC) handle conversion to and from analog domain: https://www.cirrus.com/products/cs4270/
DAC THD+N spec is 87 dB SINAD. ADC is better at 95 dB.
Conclusions
Interesting to see a full custom solution in this amplifier. This has not come cheap unless they expect huge volumes. Parts quality is average but construction is above average compared to homebrew module based amplifiers we see around.
-----------
As always, questions, comments, recommendations, etc. are welcome.
Any donations are much appreciated using: https://www.audiosciencereview.com/forum/index.php?threads/how-to-support-audio-science-review.8150/