Loud thump in left Airmotiv T2 speaker from DC-1 turn-on

[robs]

I was wondering if anyone could shed some light if I did any speaker damage. 

I have my CD player connected to my Emotiva DC-1, which then goes to my speaker amp and then out to the Airmotiv T2 speakers. I overlooked that my amplifier was turned on first.

Anyway, I turned on the DC-1 last and it was set to a fixed volume setting at -10 dB and I heard a loud thump coming from the left speaker. This only happened once.

Music seems to play just fine, but maybe I'm being way too neurotic here...but did I do any kind of damage to the T2s or even my DC-1? I forgot the DC-1 has an active buffer stage. 

Thanks guys.

[klinemj]

It you put your ear up to each speaker driver as it plays and it sounds fine, then all is good. You could also run some test tones of various frequencies through the system to get a constant sound. If both left and right sound the same, all is good. There are plenty you can download.

Mark

[creimes]

Best to have your amp trigger from the DC-1, if it can do so depending if it has a trigger input.

[robs]

Mar 30, 2019 17:58:22 GMT -5 creimes said:

Best to have your amp trigger from the DC-1, if it can do so depending if it has a trigger input.

I'll need to check the manual if there is an amp trigger input. I have no idea.

I guess I assumed the DC-1 had a muting relay so there's no clicks or pops when the input is unlocked.

My speaker amplifier is solid state, so I could run it all the time and just switch the DC-1 to stanby mode when not in use. But I'm worried about sending transient voltage spikes from the DC-1 pre-armp (which has an active buffer) when turned on.

Maybe still best practice to turn off the amp first, then pre-amp, then source?

[DavidR]

Turn OFF should be opposite of turn ON.
ON: Pre, source, Amp
OFF: Amp, source, Pre

[garbulky]

I've never had thumps with my DC-1. I've turned it on and off several times with the amps on. Perhaps the issue is with a different piece of gear like your amp?