Speaker Pop BasX 300

[uwbuckyfan]

I have a Basx 300 and PT 100 pre-amp and I noticed that I get a speaker pop when turning the amp on or off.  If I follow the sequence of pre-amp then amp for turning on and amp then pre-amp when turning off, I can barely hear a sound.  My old amp didn't care what I turned on or off first.  Is this causing damage to my speakers?  Is my amp needing service?

[leonski]

I'd turn it On/Off in the manner that made the Least noise. I'm not a big fan of those 'pops'. I get one thru my Headphones when I shut the amp off and they are connected. And it's LOUD.
Doing exactly the same thing without headphones? Speakers are dead silent. About 1 minute after shutdown, I hear relays click in each amp. Done.

I'm scared of the same thing you are. Damaging a speaker driver, most likely the tweeter which has the Lowest Tolerance for power.

[mauriceminor]

Three of my systems have preamps and power amps
To avoid speaker pops on any of them the preamp must be turned on first
On shutdown the amp is turned off, then the preamp

Crown D150A, Emotiva XPA-1's + UPA-500 amps

[vneal]

I have the A300 going thru the TA100 and leave the volume set usually on 40 with no pop what so ever. Something is amiss

 

[uwbuckyfan]

vneal

Do you turn on the amp first or do the sequence Mauriceminor talked about?

[vneal]

I have the two linked where they come on together

[musicfan]

I GEt the same pop with my a700

Really hate it but...

Never happened with my plethora of other emotiva amps

[dpetit]

All -
I experienced a similar problem with my new A700. I purchased it to replace a damaged XPA-7 gen2 I was using to drive 4 ATMOS Speakers. I had no popping with the XPA-7 Gen2. I noticed the popping sound immediately after connecting the A700 amp and powering up the system. After talking with support, I ran a few tests, and here's what I found and how I fixed it.

The popping sound was being caused by the "final" power up stage of my pre-amp (a Marantz AV7703). I had both amps configured to trigger on by the pre-amp when it powered up. Turns out the popping has been happening all along, but the 2 previous XPA-7s I had (a gen 2 and a gen3) took considerably longer to fully power up than the BASX. So by the time they powered on, my pre-amp had already sent the "pop" - the XPA-7s just missed it. The BASX comes up to power much more quickly and picks up (and amplifies) the pop from the pre-amp. I hope this explanation makes sense.

To fix this, I added a 5 second delay to the trigger. In my case, I wired the trigger line through my APC power conditioner, which has "delayed" plugs on the back that will only power up 5 seconds (configurable) after the trigger fires. This way, the preamp gets pretty far into it's startup cycle before the amps even get power. It was a simple fix. Some pre-amp may have a delay timer built it.

YMMV, but this worked for me.