Quadraphonic records (LPs to you and me)

tatyana69

If normal analogue comes through as 2 channel, what effect does a quadraphonic record have?

It isn’t clear what you mean by "normal analog." Analog can be any number of channels. Two-channel stereo is just one configuration.

In any event, a quadraphonic record can store four channels, which you can feed to a quadraphonic system using a proper phono cartridge and phono preamplifier.

@tatyana69 

You Bryston has nothing to do with Quadraphonic Descrete-4 records. In fact your Bryston designed for Digital Audio (Dolby Surround) in Home Theater application. 

To play records you need just normal stereo (Left and Right channel). 

Quadraphonic Records (Descrete-4 or CD-4) require special cartridge and special processor, also 4 speakers. You can learn more about it here https://en.wikipedia.org/wiki/Compatible_Discrete_4   

chakster

Quadraphonic Records (Descrete-4 or CD-4) require special cartridge and special processor, also 4 speakers

CD-4 was only one of the quad LP formats, although I think it may have been the only discrete format for LP.  SQ and QS were competing formats to put quadraphonic audio on LP.

The Bryston very successfully codes 2 channel into 7.1.
I never play analogue into stereo 
So the quadraphonic lps need a special cartridge ... and phonostage then. So presumably playing with a normal cartridge and phonostage some channels are missing, hence maybe a weaker sound for a number of reasons, presumably, from what you are saying?
Must be for a very limited market place these records then

I am looking at Ebay uk an item called
CARLY SIMON ~ HOTCAKES ~ USA QUADRAPHONIC STEREO AUDIOPHILE LP
So the "stereo" word is out of place, or indeed wrong?