Stupid Power Conditioner question but...

The amplifier probably worked, sounded fine, on the 15 amp branch circuit and more than likely never tripped the 15 amp breaker at the electrical panel. Pushing the amp playing high dynamics source material was more than likely limiting the full potential of the amp. You should hear a difference with the amp connected to the 20 amp dedicated branch circuit. Its not the extra breaker handle rating of 5 amps that will make the difference, its the dedicated branch circuit wiring and the larger wire size used for the 20 amp circuit.

Just a guess the 15 amp branch circuit (#14awg wire) is a convenience outlet branch circuit with several other outlets and loads connected to it. Maybe even lighting loads. Several connections made on the circuit wiring. Possibly several series resistance connections.

Your new 20 amp dedicated branch circuit is more than likely one unbroken continuous line from the breaker electrical panel to the wall duplex outlet. Bare minimum wire size is #12awg. Maybe you had the electrician install #10awg wire, even better.

The Titan is capable of delivering very high power output and its electrical consumption grows accordingly with its power output. The amplifier comes with a 20 ampere power cord and corresponding 20A IEC connector on the back panel. Most domestic 120V household AC circuits are rated at 15 Amperes. This amplifier will function normally on these circuits. To realize the full power potential of this amplifier, more than 15A will be drawn from your AC line on occasion. However, the music/movie material must be simultaneously demanding on all channels. As well, the volume on your preamplifier/processor must be set very high to encounter such a condition. Typically, not all channels are driven hard at the same time, so it is most likely this situation will not be encountered.

Page 5.
https://simaudio.com/wp-content/uploads/2018/05/95_en_guide_v_multi-channel-amplifier.pdf

I would plug the amp directly into one of the receptacles of the dedicated 20 amp circuit’s duplex receptacle outlet. Use the other outlet of the duplex for the Panamax M5300 PC to power the other associated audio/video equipment.

Jim
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Thank you very much Jim! Great reply and sincerely appreciated. I honestly had been thinking about plugging the SimAudio amp directly into the outlet. I already have the Panamax plugged into one of the receptacles. Plus I also have a whole house surge protector so I think the amp is safe as kittens from surges, no? I think I'll go direct to the outlet for the amp! Thanks again Jim for taking the time to answer...

Best Regards,
Brian

If you are going to run any nice gear without surge protection (and you should rarely do this) then at least install a whole house surge suppressor.

There's really no practical difference in a 15A vs. 20A circuit except for the minimum gauge of wiring required.  12 ga. vs. 14 ga. which with a long run can give you a bit better voltage performance.

@OP
+1. The whole house surge protector is the best way to safeguard against power surges, not only for your stereo equipment, but your computers, as well.
@erik_squires @jea48 ,
Always great advice.
Bob

“I would plug the amp directly into one of the receptacles of the dedicated 20 amp circuit’s duplex receptacle outlet”

Please don’t do this without installing surge protection at your main breaker box.