[quietdragon]

I had previously sent a post about this topic.

I use the remote trigger that has my 14B-ST as a trigger slave to my Squeezebox, and my DAC as a trigger slave to my 14B-ST. This configuration allows me to power on/off the audio system using my Squeezebox remote control alone.

Recently the 14B-ST "snap"/"pop" at power off has starting bothering me again because it can seem quite loud on occasions.

I'm wondering if anyone has any experience using loudspeaker switches that can be operated by remote control ?

For example, here is a XanTech SR-21. The speaker binding for this unit is rather poor, but the concept is about right.

[tim92gts]

Hi,
my 14BSST2s are dead quiet on trigger off, can you alter the order of switch off?
At least then the amp will be cut off from the SB at shutdown.
If the whole lot is switching off simultaneously might a delay relay on the trigger line be better than a switching box in the speakers leads?
Tim
Apologies for the duplication, link just worked

[quietdragon]

my 14BSST2s are dead quiet on trigger off, can you alter the order of switch off?
At least then the amp will be cut off from the SB at shutdown.
If the whole lot is switching off simultaneously might a delay relay on the trigger line be better than a switching box in the speakers leads?

Sigh. It's the only complaint I have with my 14BST.

I took my DAC out of the trigger chain [just leave it on all the time]. Still pops.

Thinking about it now, I should also try taking the Squeezebox digital output out of the trigger chain to see if it has any effect. (I doubt it ... the Squeezebox is configured to leave digital outputs active even when "off". It could wrong. I'll need to try it out.)

Yeah ... if I could "fix" it by changing the trigger order, that would be preferred to sticking more things in the audio path.

If I'm forced to go down that path, my delight with a pop free turn off will more than compensate for any audio degradation that I might hear (I doubt my ears and listening skills are that good).

[quietdragon]

Thinking about it now, I should also try taking the Squeezebox digital output out of the trigger chain to see if it has any effect. (I doubt it ... the Squeezebox is configured to leave digital outputs active even when "off". It could wrong. I'll need to try it out.)

No effect. Leaving both the DAC and digital audio output powered on, and just turning the 14B-ST off via the trigger results still results in a pop.

[tim92gts]

Hi,
have you checked earthing as James suggested?
Mine are on a dedicated 60 Amp spec ring main so earthing
was guaranteed perfect.
Worth looking at the dac earth too although it's probably two pin into a psu.

You'll be looking for minimal resistance to earth and low voltage from neutral to earth.

Be careful if messing with mains voltage, i had a friend who died from a miswired house.
HTH
Tim

[quietdragon]

have you checked earthing as James suggested?

Hmm ... didn't catch that one first time through. Good to check.

[ellsworth]

My 14B SST (with Swedish choke mod) does the same thing. I was worried that it might damage the ribbons on my speakers (Magnepan 3.6), but so far so good. Most of the time it is a fairly soft pop, but occasionally it can be a pretty nasty snap. I don't think it is a ground issue as my whole system is connected to a Torus RM20, and I use the BP26 trigger to turn everything on/off. My theory is that it has something to do with the output caps in the amp discharging on shutdown. In my system it tends to be worse when the amp has been idling without any music playing for a significant length of time (hours). I find that briefly playing some music (< 1 min.) before turning things off can result in a softer pop (or none at all). Most of the time I just flip the switch and cross my fingers that it won't be a big snap. I had a 4B ST and a couple of 3B STs several years ago that did the same thing into some B&W 600 series speakers. These were far more efficient than the Maggies, but the pop was never loud enough to bother me. I'm sure there's something that Mike Pickett could do about it, but in my case its not worth being without my amp for a couple of weeks. Besides, shipping the 14B to Bryston is not cheap - the sucker's heavy!

[quietdragon]

My 14B SST (with Swedish choke mod) does the same thing. I was worried that it might damage the ribbons on my speakers (Magnepan 3.6), but so far so good. Most of the time it is a fairly soft pop, but occasionally it can be a pretty nasty snap.

I think your set up is very similar the same as mine. The SNAP can be quite loud at times -- but sometimes is a very weak pop. I haven't been able to figure what I do, if anything, that can influence this one way or the other.

[mhrischuk]

I recently purchased a used 14B sst. I don't remember when but it starting making loud pops at shut down. Today I contacted service. They had me isolate it to a loose speaker connection over emails. All is well now. Apparently during one of the times I was moving the cabinet the speaker lug came loose.