Vermes
Advanced Member level 4
The aim of the project was to create a high-quality audio system for both stereo and video, with plenty of features with not banal, original housing as for the home design. Both devices has individual switches, so they can be not only switched by one main switch, but also individually as well as with the remote control.
Amplituner:
All the boards were made with the use of solder mask. The power supply was divided into a stabilized and not stabilized and along with the transformer were placed in front of the device. The transformer used was 350 watt EI Sony. All conditioning in the power supplies are Nichicons. 2X55V for the tips are filtered by two gold Nichicons with a capacity of 6800uF each. The power amplifiers are the newest STK 433-130 and STK 433-090. Elna for Audio and Rubycon were also used, they are situated in the whole audio path also in the sound processor. The sound and multizone processor takes the whole bottom of the device under the tips. It consists of a filter, active fixed and adjustable so that you can choose the type of sound set. Volume control system is DS1802 with limiter and buffer. Upc1237 from Nec is responsible for the surround sound. Audio and video signals are switched by the Omron relays. All modules are connected via computer tapes and the signal by 90 degrees modules connector.
Everything is controlled by Atmega128. The code was written in C. The device has many features available from multi-level menu. You can make a lot of settings there associated with Dolby surround as well as the sound processor modes. But you can also simply disable LPF channel (subwoofer output has already filtered signal) or regulate it (cut, steepness, number), change the connecting port mode, the USB port, set the volume of centre and surround channels, effect.
The device can also operate in stereo or stereo-bi amping mode, which brings more power and a separately regulated tone of e.g. mid-woofer section and treble amplifier. You can also enable the Pure function which is an analogue equivalent of Direct and you then have only stereo amplifier with potentiometer.
You also have developed systems of triggers available from the menu, that control blinds and lighting, e.g. when watching a film.
Link to original thread (useful attachment) – System kina domowego i Multizone Ver 2