Anyone have this turntable issue?

Whenever I set my cartridge on the record, I hear a loud pop. This is with the volume turned down all the way. It seems to be the stylus entering the groove. I have done everything to avoid static in the system. I'm quite sure it is not static. Just one loud pop when the cartridge is lowered. No problems after that. I cannot imagine how that impulse noise gets to the speaker with zero gain on the preamp/processor. How can this happen?!
Just a guess the mute circuity is ahead of the volume control circuitry section.
You might want to contact Byrston Tech support.  

Just curious did you try setting the SP3 to a different Line Level input and run a test?  
In addition to the experiment Jim suggested, did you try this experiment I suggested earlier:

... if you are still using the Plinius Odeon amplifier you mentioned in a post a few months ago you might try changing the setting of its ground-lift switch to the opposite of what it is currently set to. It would be prudent, though, to turn the amp off and wait about 30 to 60 seconds before changing that setting.

While Bryston provides schematics at their website for many of their models, unfortunately they don’t for the SP3. And neither does But I took a look at the schematic for the SP1.7:

As is the case in many designs it appears that the muting function is accomplished with relays that short the various outputs to ground when the mute function is activated. It also appears that the outputs are AC coupled via 100 uF capacitors, which are "ahead" of the relays in the signal path. I would expect that the SP3 is similar in those respects. If perchance you have the ground-lift switch on the amp set to the lift position, while I can’t formulate a complete explanation I’m thinking that the issue might be related to the fact that with the switch in that position and no signal existing within the SP3 the AC coupling would allow the input of the amp to "float" to an uncontrolled and arbitrary level relative to its chassis and to AC safety ground and to the chassis and the circuit ground of the SP3, **if the muting relays are not activated.**

That may or may not have anything to do with the problem, of course, but intuitively it seems to me that it's a possibility. And in any event if you are using the Odeon the experiment I suggested is easy enough to do. Also, as Jim suggested contacting Bryston and describing your findings to them may be worthwhile.

-- Al

Interesting that I have this happen too on my turntable but it only pops on my left speaker and not all the time. Only when I use the dust brush so I have to think it has to be static. Weird that it comes through when my amp is muted though.
I'm going to upgrade my table soon anyway and get a cork mat.
Try this, and it may seem simple. Move the stylus to the lead-in groove and before you lower it, move it just enough such that it touches down after the music has been cut into the vinyl. In other words, try lowering the stylus anywhere on the record where the music groove has already been cut.

This does not sound like a static issue to me ( but it could very well be an issue of high static charge). Does this happen with a wide variety of records or are you only hearing this wth one album?
My London Reference is very sensitive to landing and lift-off from the record and it has nothing whatsoever to do with static. I’ve seen this lead in pop noise also with my modified Denon 103.3 and it seems to happen more so with newer albums where the vinyl has a rim-lip, sometime I can see the stylus make a mechanical jump to land into the lead-in groove.

I found this on another site and this is what I’m referring to in my above post.

another author wrote:

“It seems that about 1 in ever 4 to 5 times I start a record when the stylus touches the lead-in groove it jumps a few grooves in to the first couple of seconds of the first song. I was wondering if this was normal because I do not remember my old Sony Direct drive doing this but my new table is alot more precises and sensitive? I did some Google searching and found this on Wikipedia "# Because of a slight slope in the lead-in groove, it was possible for the stylus to skip ahead several grooves when settling into position at the start of the recording."”.