Dedicated circuit's' ? or one dedicated circuit?

Actually I have two circuits designed for 240 volt Euro equipment that are wired with a 50 amp breaker. I did not request this, it's what the electrician provided.

Curiosity killed the cat. Could you give more detail?
Are the VTL Amps 240V?

Two 240V circuits wired with a 50 amp breaker.

Each?
Are these feeding two small sub panels?
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Even with each of my four VTL 750's on their own 20 amp breaker.

20 amp breakers fed from sub panels? Two 20 amp breakers for two VTL Amps, each sub panel?

Even with each of my four VTL 750's on their own 20 amp breaker, if I switch between first and second click (startup sequence), the breaker will trip.

Depending on the panel manufacture, Square D for one, make breakers with a longer lag time for inrush current. Ask you electrician to check into it for you.
Jim
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The 240 volt wall outlets are currently not being used for any equipment in the system. In the past they have powered several 240 volt amplifiers.

I'll make another attempt at describing the set up and breakers.

One of the two large (interior) main panels has a 50 amp breaker which supplies the (third) 240 volt sub panel. This 240 Volt panel currently supports only two outlets at the amplifier side of my system.

For only these two circuits, I choose the Hubbell twist-lock 30 Amp male and female, (unplated and cryo treated), which cannot accept 15 or 20 amp (120 Volt) household plugs. This eliminates the possibly of frying 120 Volt equipment.

The 240 volt sub panel has two additional 10 amp breakers, one for each of the available 240 volt wall outlets. All of these panels are Square D brand, commercial grade with copper bar and bolt in type breakers. The electrician used a torque wrench to install the breakers as specified.

If I did not make it clear this time, the VTL's have four separate breakers, one for each amp, and each rated at 20 amps at 120 Volts.

And yes, the two stage turn-on pair of VTL 750's still occasionally trip the breaker at start up. Perhaps I'll look into the longer lag time breakers Jim mentions. That could be valuable since these amps have such huge power supplies and large storage caps.

An alternative to multiple dedicated lines, and the method I used, is a single 240V line fed to a subpanel and proper use of isolation transformers/power conditioners.

Isolation or step-down transformers can be had fairly cheaply. My big 5KVA cost only $100. Transformers can be tricky and may hum under some circumstances. Mine don't, but they can in some wiring configurations. There's a learning curve involved. Partially wired for balanced AC now.

I don't want to start a discussion about power conditioners but many are built around a transformer, usually toroidal. As I said, not going there.

North American 240V is dual 120V out of phase, which can cause other issues. The galvanic isolation of my TVC prevents most of those. Granted, my system is fairly unique but with nearly 3KW of amplification, it needed to be.

I have two dedicated circuits but use only one. The Acoustic Revive RTP-6 is essential and too expensive to have two. My amp is the 150 watt Exemplar Statement ss amp. It sounds better into the RTP-6 than into its own dedicated outlet.