Need some advise please on a 30 year old system

Regardless of what you decide to do with it, take it to a reputable technician that does restoration work for high end audio gear for check out and clean bill of health.

That will optimize the value.

Sadly, most of us aging audiophiles face the same ending ... our kids just really don’t want all this stuff we’ve accumulated. I’ve got a huge collection to dispose over the next few years rather than saddle my daughter with it.

+1 fiesta75! Using a variac to power up vintage gear from storage is very good advice! That way the power supply caps can reform slowly - and may prove perfectly usable!

Using a Variac on a SS amp, you better know what your doing. MOST SS amps Don't like low voltage. The reason for a Variac in older gear is just as Mr Bourne said, BUT there is a big difference in the HOW old PtoP come online vs SS. There are diodes that just DON'T work until you hit that 105-125 vac mark. It will COOK the thing with low voltage..

I take up to a week to bring up an old point to point amp. 25 vac for a few days. It tightens the old caps up and can SLOW external liquid leaks on the PIO and even filter caps..

OP how are the surrounds and cabinets? Are all the servo amps an XOs there?

Betas can be a lot of fun.. I've tinkered with them a few times, added enclosures to the mids and low mid planars. Just stunning after a few mods..

Stock.. What can I say they are OB dipoles, tough to get them to work right, a LOT of combing going on. The timing front to rear with that narrow baffle????? They envelope a room stock. A lot of sound everywhere!!

The Servo bass CAN sure work great too..

What state are you in? Not a trick question either. :-)

Regards

You said these were in storage for 8 years, was the system operated before then? If off for 8 years, that's not too long for an SS amp. The Spectral preamp has a separate power supply, so you can power up the power supply without connecting it to the preamp itself first. I have not had a problem with bringing SS equipment up to voltage relatively quickly. Say from about 50% of line voltage to 90% line voltage in about 2-5 minutes. Then go up to the full voltage slower, maybe 1 hour from 90% to 100%. After bringing the power supply of the Spectral to 100%, let it run for a couple hours or more. Then turn off and the next day, connect the preamp to the power supply and bring the voltage up to 90% in 1-2 minutes. Again go from 90% to 100% in an hour and let it run for a while. Follow similar procedure for each power amplifier separately, 2-5 minutes 50-90% then 90 to 100% in an hour.  I'm sure others in the community will have comments, so I encourage you to wait to get more input. If you want to message me, feel free.