Bonjour de France !!!! Egalement passionné depuis 1970 par la quadriphonie ! Marantz 4400, cellule panasonic EPC 450 C -II, démodulateur 4 canaux panasonic , décodeur SQ audionics of oregon space and image composer , magnétophone a bandes TEAC 2300 SX+ enceintes , vinyles CD4 ( plusieurs dizaines...) SQ, QS !!!! Et toujours aussi passionné et à la recherche de disques CD4 QUADRADISC !! 👍👍👌👌🎶🎶🎶🎶🎶🎶🎶🎶

John, a few important points about the comments you made about quad, back when these albums were first issued. First, the CD-4 system, used by Warner Brothers for their quad releases. Warner was all set to release their quad records, using the QS matrix system, until Brad Miller, of Mobile Fidelity, threatened to pull his titles from their catalog, if they went with a matrix format. Warner caved, and decided to go with CD-4 instead, to placate Miller. Miller still pulled his titles from WB, to start his own label, Soundbird Records. The CD-4 format was very finicky; it required a special cartridge, on the turntable, which could reproduce the frequencies needed for the carriers that contained the difference signals for the demodulator to split rear from front. The cartridge had to be perfectly aligned in the tonearm, and the cables, from cartridge to demodulator had to be very low capacitance. All told, the format should have worked better than it did. Had WB stuck to their guns and used QS, no special cartridge would have been needed. Any stereo cartridge could do the job. The matrix decoders back then were still works in progress. Even though very few quad records are being produced today, many people, like myself, have extensive collections of both SQ and QS records. We still like to play them. An Australian company, Involve Audio, has produced a decoder that can properly decode both SQ and QS, with separation as good as most discrete systems, that can be added onto any system that offers multichannel analog inputs. It's worth looking into, and the decoder is less expensive than the best separate QS and SQ decoders of the 70's era. I concur, 100%, with your evaluation of the Doobies; Quadio box set. Rhino has, since, released four more albums in Quadio, from Black Sabbath, Jefferson Starship, J. Geils Band, and Alice Cooper. They all sound quite amazing. All are the original quad mixes, as appeared on the LP's. Rhino have also announced there will be more, presumably later this year. And, unlike the Doobies' set, they're using Dolby Atmos, for those people whose systems have that capability. For those who don't, they'll fold down to 5.1 quite well. By the way, the four albums I mentioned above are also Atmos! They'll fold down to 4.0, if that's what you want, with absolutely nothing lost.

Tom JOHNSTON....not Johnson, and thanks for the review. 50 year fan and friend of the band. -Larry G Loveland, Co

I downloaded the Doobies quadios and got an interesting effect. I do not have a four channel system, just stereo, so only two channels are heard. A fascinating unintended alternate mix. And the clarity of sound is crisp and phenomenal. A totally different experience with albums I am very familiar with. Love them!

I was late to the game, but purchased Chicago Box and Doobie Brothers Box. Listening was an exciting and thrilling experience. Quickly purchased the Quadio Bundle from Rhino as well as preordered Richard Wright's Wet Dream. (Notice some items were sold out in 30 days!) I'm glad you pointed out that having a blu ray player and 5.1 theatre system will work fine. I had to turn off the LFB. There were so many desirable Quad 4.0 produced in the 70's, so I'm hoping that Rhino able to bring us Bowie, Aerosmith, Pink Floyd, Led Zeppelin (just to mention a few). One last thing, hopefully, Rhino will print "sold out" items--they were not limited editions (as far as I know). =)

Greetings Sir. Kinda off the subject but I’ve been looking at yours videos and have a question. I’m currently in the market for a multi channel A/V processor and actually have a Anthem AVM 70 on order but nobody knows when they will ship. I went to my local high end audio store and was looking at the new Macintosh AV processors and the salesman told me he would drop $2000 off the price of the MX 123 if I bought one of their amps to go with it. Should I stay with the Anthem or get the Macintosh ? Normally the Mac runs $8000 now 6000. Thank you for your very informative videos. My best Dan