At the event in AmberExpo we invited artists to collaborate with us on creating new PC visions for music playback. The concept without a housing was created with the Swedish artist Per Dahlberg and was at the center of the stand.
The American Marantz had in the 1970s an impressive quadraphonic offer
"his is one of the more powerful Marantz receivers ever made. It’s the Marantz 2500. It is somewhat rare and was produced from 1977 to 1979. It retailed for around $1600.00 and was eventually replaced by the 2600. The 2500 put out 250 watts per channel in to 8 ohms and was second only to the 2600 at 300 watts".>>>https://classicreceivers.com/marantz-2500
The PC4uMusic configuration supports the latest 4-speaker music playback format
The British-Norwegian NAD tradition is the optimal selection of only the necessary components
"The NAD 3020 is a stereo integrated amplifier by NAD Electronics, considered to be one of the most important components in the history of high fidelity audio. Launched in 1978, this highly affordable product delivered a good quality sound, which acquired a reputation as an audiophile amplifier of exceptional value. By 1998, the NAD 3020 had become the most well known and best-selling audio amplifier in history" >>>https://en.wikipedia.org/wiki/NAD_3020PC4uMusic can be optimally configured for just music playback with free AIMP and WASAPI
Danish B&O has provided beautiful hi-fi equipment for every home
"Perhaps
the definitive B&O product. Combining innovative, cutting edge
technology, precision engineering, superlative performance and
outstanding appearance in a tasteful, usable, relevant package, it set
the standards for top end Hi-Fi. For a small organization like B&O
to release a product like this stunned the audio industry, who were used
to seeing a lead from the likes of Technics and Sony. Both these
companies, and many others besides, tried in vain to imitate the Beogram
4000, but none ever offered a convincing alternative" .>>>https://beocentral.com/beogram4000The Swiss Revox has offered great semi-professional solutions for decades
1st Reference PC4uMusic with FM radio was inspired by Swedish design
"The R4000 shares the same basic chassis with the P4000 integrated amplifier (with minor differences in the way the front is cut out to let the controls through) The chassis is made of a two-piece diecast aluminium, the top, front and 1/4 of the bottom being one piece, the other being the remaining 3/4 of the bottom. According to Sonab's literature, a car could run over the R4000 without damaging it " >>> http://www.thevintageknob.org/sonab-R4000.html
It was considered to mount a 2x80W power amplifier in the PC4uMusic as in the Sonab P4000, but connecting thick cables to the speakers is not practical here. However, it is possible to mount separate contacts on the front for the left and right microphones, as well as good quality amplifiers for them. This gives you the ability to optimally record music from vinyl records to take advantage of the RIAA digital equalization on your PC. This allows even more faithful reproduction of quadraphonic SQ/QS recordings.
PC4uMusic is a better recorder than Sonab 500 and even more convenient
"Measured performance was very respectable by mid-seventies standards, although it won’t set the world alight now. We’re talking wow and flutter of 0.13% (peak weighted) and 30-16,000Hz frequency response (+/-3dB). Signal-to-noise ratio was 51dB with Ferric and Dolby off, 60dB with Chrome and Dolby on. This was good for a deck of the day, and a small and compact one at that (380x250x105mm) weighing 4.5kg." >>> https://zstereo.co.uk/2015/01/29/sonab-c-500/PC4uMusic was developed in the music city of Sopot, on the southern Baltic coast. The inspiration for the creation of BienSound PC came from Sopot and Stockholm, with the computer processing of various types of demos for musicians, where we found that "analogue cut" PC is necessary for crystal-clear digital recording.
1 st Reference PC4uMusic with FM radio has features like the Swedish Audio Pro TPA 150
This design from the 70s was called Computer Controlled AM-FM Recieve and was created for the offer with active hi-fi speakers
In Sweden in the 1950s, an active loudspeaker with tubes was already offered to provide surround sound from monophonic recordings
Amplifier:Push-pull tube amplifier, OTL, Output Transformer Less with two separate channels. One for low frequencies 20 – 300 Hz and one for higher frequencies 300 – 16.000 Hz. 55dB of negative feed-back. Amplifiers located inside the cabinet.
Output tubes Two pairs of EL86
Output power 10 – 12 watts per channel (high freq. and low freq.).
Principle Three way bass reflex. Active bi-amplified speaker with level adjustment for the low frequencies for adjustment to the room.
Woofer Peerless 10 inch, 800 ohms.
Midrange Philips 9710AM, 800 ohms
Tweeters 4 Pcs. Peerless MT20HFC driven by a transformer with air gap.
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