This thread replaces the old "
New Members Only!! (Members who have never posted)" thread, which got to be a little on the LARGE side!
https://www.quadraphonicquad.com/fo...bers-only-members-who-have-never-posted.2843/
Hello, I am EJ3
In the early 70's I had a Toshiba SQ Quad system. I also have several of those LP's.
Currently I have a way to do Quad with 2 APT/Holman Preamps (one of which was tested by Audio Science Review (Apt Holman Preamplifier (vintage audio)
Quadraphonic Synthesis
With two Holman Preamplifiers, you can synthesis and control four output channels from just two input channels.
Apply all your inputs to the first Holman Preamplifier. Use it for all your tone controls, filters and source and tape selections. Leave its Stereo Mode in Stereo.
Connect the first Holman Preamplifier's MAIN 1 output to one power amplifier and your two front speakers.
Connect the first Holman Preamplifier's MAIN 2 output to any line-level input of the second Holman Preamplifier.
Connect the second Holman Preamplifier's MAIN 1 output to the power amplifier for your two rear speakers.
Rotate the second Holman Preamplifier's stereo mode control to L-R, and start by setting it to about unity gain or a bit less, and keep its tone controls flat. The tone and filter settings of the first Holman Preamplifier are fed automatically to the second Holman Preamplifier.
Set balance on the first preamp. Set front-rear balance on the Volume control of the second preamp.
Leave the power switch of the second preamp ON, and plug its power cord into a switched outlet of the first Holman Preamplifier. Now the power is controlled by the first Holman Preamplifier, too.
And I have moved to a new (to me) 1100 sq. ft. 1968 home that I am restoring. I currently do not stream (maybe I will one day), and will initially set up my system as stereo. But at some point next year (the budget is very tight right now (& I was just in a major car accident, through no fault of my own that had me T-Boning them at 40+ MPH because they made a left turn in front of me. I am very fortunate that the airbags did not deploy and blow out my hearing, but I have a lot of what they call "soft tissue damage" and am requiring a lot of Physical Therapy. I was laid off a few weeks before this [I have savings, etc] but it makes it difficult to progress on the house). So it will be certainly after January before I can get back into Quad.
In addition, I have 6 NAD 2200's (See a review of one of mine in Audio Science Review under NAD 2200 vintage review), 3 Dahlquist 905 speakers (the 4 has water damage due to a salt water flooding (I need a new cab but may just find another pair) none of the inside components got wet and I was able to save them & clean them up) and a pair of custom subwoofers.
Very recently I heard about the SCHIIT SYN, which has tweaked my interest in QUAD again (not that it ever really went away).So here I am, looking to assemble a quad system in the first quarter of 2024.