CD-4 - The thin line between success and failure, but still in the fight!

[edisonbaggins]

@fredblue these are potential test/set up/demo discs I have onhand

 

[fredblue]

View attachment 82723
@fredblue these are potential test/set up discs I have onhand

the first few (test material) tracks of the Top Middle disc (Fisher) and then Track 1 of Top Right (Spinners) is all you'll need!

 

[Doug G.]

I like both the Fisher and Harman/Kardon discs for setup as they correlate real well with production music discs.

On the Doors disc,"Riders On the Storm" is good for the whispering in the back channels, of course, and "Moonlight Drive" is great as the guitar solo should be right at the left back.

Carly Simon's "You're So Vain" is great because the guitar should be right at the right back.

Doug

 

[Quad D]

This record has very good tools for adjustment. Channel identification track, level adjustment, separation adjustment, carrier level.

CD-4 CHANNEL DISCRETE DEMONSTRATION RECORD-M1973LP Warner/Electra/Atlantic PROMO

Side 1:
Left Channel Separation Adjustment Tone
Right Channel Separation Adjustment Tone
Channel Balancing Tone
Channel Location Tones
Carrier Level Adjustment Tone
ARETHA FRANKLIN: Rock Steady
BREAD: Mother Freedom
DOOBIE BROTHERS: Dark-Eyed Cajun Woman
STARDRIVE: Ruches

Side 2:
CARLY SIMON: Embrace Me, You Child
SEALS & CROFTS: Diamond Girl
ARLO GUTHRIE: Gypsy Davy
BETTE MIDLER: Do You Want to Dance?
SPINNERS: Could It Be I'm Falling in Love

 

[Doug G.]

It also has the coolest quad cover, ever.

Doug

 

[J. PUPSTER]

What’s the consensus on this test record?

https://www.discogs.com/release/154...-4-Quadradisc-4-Channel-2-Channel-Test-Record

 

[Quad D]

What’s the consensus on this test record?

https://www.discogs.com/release/154...-4-Quadradisc-4-Channel-2-Channel-Test-Record

Seems great to me, very elaborate and useful tests on track listing.

 

[Sonik Wiz]

What’s the consensus on this test record?

https://www.discogs.com/release/154...-4-Quadradisc-4-Channel-2-Channel-Test-Record

Me thinks I remember some comments made on the forum about some of the frequency sweeps being incorrect. Fortunately, IMO, they have never been useful to me anyway.

There is no carrier level test track, but the separation adjustment tracks work well.The channel identification tracks on side 2 maybe works better since it's a musical selection. When the track identifies "left front" adjust the left rear separation pot for minimum output. And the same for the right side. The auto detection track seems to be good.

I think an often overlooked point on these set up records is that previously owned with an amount of wear & tear may not yield the best results. If possible it would be good to double check against a NOS set up disc.

 

[J. PUPSTER]

This record has very good tools for adjustment. Channel identification track, level adjustment, separation adjustment, carrier level.

CD-4 CHANNEL DISCRETE DEMONSTRATION RECORD-M1973LP Warner/Electra/Atlantic PROMO

Side 1:
Left Channel Separation Adjustment Tone
Right Channel Separation Adjustment Tone
Channel Balancing Tone
Channel Location Tones
Carrier Level Adjustment Tone
ARETHA FRANKLIN: Rock Steady
BREAD: Mother Freedom
DOOBIE BROTHERS: Dark-Eyed Cajun Woman
STARDRIVE: Ruches

Side 2:
CARLY SIMON: Embrace Me, You Child
SEALS & CROFTS: Diamond Girl
ARLO GUTHRIE: Gypsy Davy
BETTE MIDLER: Do You Want to Dance?
SPINNERS: Could It Be I'm Falling in Love

Is there a discogs page for this one?

 

[fredblue]

What’s the consensus on this test record?

https://www.discogs.com/release/154...-4-Quadradisc-4-Channel-2-Channel-Test-Record

mine's very noisy on certain test tracks and its full of pops and ticks throughout. tbh i wouldn't bust a gut over getting a copy.

 

[Sonik Wiz]

Is there a discogs page for this one?

???:
https://www.discogs.com/release/445...Present-CD-4-Channel-Demonstration-Quadradisc

 

[Sonik Wiz]

There is a brand new factory sealed disc of this for $30 on Discogs.

 

[J. PUPSTER]

???:
https://www.discogs.com/release/445...Present-CD-4-Channel-Demonstration-Quadradisc

Hey, is that Aretha ‘Rock Steady’ out in Atmos now? Be good to compare

 

[fredblue]

Hey, is that Aretha ‘Rock Steady’ out in Atmos now? Be good to compare

 

[Doug G.]

One of the errors on the Dorren disc is where they identify a reference tone as being 1kHz and it's actually 2kHz. This is in a couple of places. The other is where it's indicated sweeps are left front and left back together and then right front and right back when actually, it's both front channels together and then both back channels together.

All sweep related as Sonik Wiz noted so no real bearing on the quad stuff. The record is meant to check out two channel systems, too. I enjoy the goofy little ditty used in several places, like with channel identification and the "Bean Whistle Rag" is terrific.

There is also a test to check if your demodulator 30kHz detection is working correctly. (Oops, Sonik Wiz already mentioned this test).

Doug

 

[edisonbaggins]

There is a brand new factory sealed disc of this for $30 on Discogs.

I just sold several for a few $$ a piece!

 

[Sonik Wiz]

Oh now look at this dear friends. Purchase this fine JVC CD-4 unit and convert your regular 2 ch stereo discs to Quadradisc!!:

https://www.ebay.com/itm/1550928103...EzV4Evyl3wB2m438lqKXxyOZg=|tkp:Bk9SR6KB6bzbYA

 

[Doug G.]

Dang! How did I miss that model, back in the day? Here all my 2000 or so regular two channel records could have been Quadradiscs all this time!

Doug

 

[quadsearcher]

It's some kind of marketing thing, there are a couple others.
https://www.ebay.com/itm/1655695858...XiVzQXFlWLAn3bDPOk7N|ampid:PL_CLK|clp:2563228

 

[Doug G.]

Marketing - the bane of reality.

Doug