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Post by ziggurcat on Oct 9, 2021 12:37:43 GMT -5
I got an A3 back in May, and I finally got it connected to my AVR a bit under two months ago. Last night I noticed that when I turned off the AVR, there was an audible "pop" coming from my LCR (which is what the A3 is driving in my HT), and I'm worried that this could potentially damage my speakers. Full disclosure is that it's not what I would describe as a loud pop, but it's audible enough for it to be a concern over time. The pop doesn't always occur, either, which is probably why I haven't really noticed it until now.
I have the A3 connected via the 12v trigger, and when I turn on my AVR, everything powers up just fine (the AVR turns on, and then the A3 turns on about 3 or 4 seconds later). I have, with 100% certainty, concluded that it's a timing issue, and that the A3 has to turn off before the AVR when powering down - right now, the AVR shuts down first and then the A3 goes into standby mode all within a second of each other. The pop doesn't occur when I manually turn off the A3 (either by pressing the standby button on the front or disconnecting the 12v trigger). At this time, I'm not sure whether the device responsible for this is my AVR (a Marantz SR6014) or the BasX A3.
Any advice would be helpful.
Thanks!
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Post by AudioHTIT on Oct 9, 2021 13:34:37 GMT -5
I got an A3 back in May, and I finally got it connected to my AVR a bit under two months ago. Last night I noticed that when I turned off the AVR, there was an audible "pop" coming from my LCR (which is what the A3 is driving in my HT), and I'm worried that this could potentially damage my speakers. Full disclosure is that it's not what I would describe as a loud pop, but it's audible enough for it to be a concern over time. The pop doesn't always occur, either, which is probably why I haven't really noticed it until now. I have the A3 connected via the 12v trigger, and when I turn on my AVR, everything powers up just fine (the AVR turns on, and then the A3 turns on about 3 or 4 seconds later). I have, with 100% certainty, concluded that it's a timing issue, and that the A3 has to turn off before the AVR when powering down - right now, the AVR shuts down first and then the A3 goes into standby mode all within a second of each other. The pop doesn't occur when I manually turn off the A3 (either by pressing the standby button on the front or disconnecting the 12v trigger). At this time, I'm not sure whether the device responsible for this is my AVR (a Marantz SR6014) or the BasX A3. Any advice would be helpful. Thanks! In the ‘old days’ before triggers, we would always power on the power amp last, and off first; this would reduce the possibility of pops reaching the speaker. A trigger should perform this function, but it sounds like yours is ‘too fast’, I’d suspect the AVR, but honestly am not sure where the delay is built in. |
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Post by vcautokid on Oct 9, 2021 23:39:01 GMT -5
Correct the power amplifier is always power on last and powered off first to Eliminate the transient on and off. Maybe the Marantz settings need to be redone. Since you can shut down the A3 manually with no transient pop, sounds like the Marantz is suspect. I would if possible if you haven't already record all of your settings if possible and reload a new again. Maybe there is some corruption causing the the receiver to shut down rather than the A3 first. Did it always do this, or did it just start doing this? If so, I would save settings and reset and reload the Marantz again if possible. Most likely this will fix it, otherwise contacting Marantz support may be in order.
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Post by ziggurcat on Oct 11, 2021 20:33:52 GMT -5
Correct the power amplifier is always power on last and powered off first to Eliminate the transient on and off. Maybe the Marantz settings need to be redone. Since you can shut down the A3 manually with no transient pop, sounds like the Marantz is suspect. I would if possible if you haven't already record all of your settings if possible and reload a new again. Maybe there is some corruption causing the the receiver to shut down rather than the A3 first. Did it always do this, or did it just start doing this? If so, I would save settings and reset and reload the Marantz again if possible. Most likely this will fix it, otherwise contacting Marantz support may be in order. I do not know whether this has always happened or if it just started to occur. I don't recall the shutdown sequence changing at all from when I set the A3 up a few months ago. I just restored the Marantz to factory settings, so we'll see how things go from here. I sort of pin-pointed the pop to specifically come from the centre channel, but I'm not sure whether that makes any difference. I also contacted Marantz to see if they have any thoughts on this as well. I know that there's going to be a Marantz firmware update coming on the 29th of this month, but AFAIK it mainly addresses sound bleeding into the rear speakers when it shouldn't (something I've complained to them early last year, but was told it was normal). I'm probably over-analyzing things a bit, and this is all probably normal behaviour. As I said in my OP, it's certainly not a loud "pop" or "tick", but it's loud enough to be heard from my listening position. I did also contact Emotiva directly, and they came back with that unless the pop is VERY loud (enough to move the woofer cone) or gets worse then there's nothing to worry about. I would still maybe like to be able to delay the shutdown of the AVR when powering down so that the A3 powers down first, though. |
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Post by Ex_Vintage on Oct 15, 2021 23:22:09 GMT -5
The "pop" is most likely from the AVR. If you can power the A3 on and off separately with no pop, then I would assume its the AVR. An integrated amp will disconnect the speakers before power down or after power up to avoid such disturbances. The AVR may not have that protection built in, so its a power down race issue.
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Post by rockrelay on Dec 17, 2021 8:46:17 GMT -5
check this link emotivalounge.proboards.com/thread/59496/basx-coil-whine-speakers-electrostaticall these are unacceptable and there is no excuse, ...... the company answered something normal when is not.... pop and audible loud coil whine is not normal coil whine mean low quality parts on power supply...pop mean the absence of isolation relay ? generaly the sound is well balanced and dynamic with basx a3 but they have to solve more things before sell, or at least quality control... generaly is ok purchase for US not for EU with delivery fee tax cuctoms ... and now by raising the price is better to give some more money and choose another brand. |
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Post by brutiarti on Dec 17, 2021 10:39:25 GMT -5
A pop when on/off an amplifier is pretty normal.
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Post by 405x5 on Dec 17, 2021 12:41:44 GMT -5
A pop when on/off an amplifier is pretty normal. It certainly can be characteristic of some amplifiers. My “click pop” history goes back 44 years were I to think about it….going back to the Phase Linear 400. That one powered down with a gentle “thump” and the VU meters would do a little dance 💃 in concert. The Carver 1.0t’s. they “sputtered” down, kinda sounding like a washboard when strummed with a stick as a musical instrument! 😱. All of that was exacerbated in the bridged mode. Unfortunately, my pop noise award goes to the Emotiva XMC1. It’s perfect now and has been for years but BEFORE firmware 4.1, it was the most frightening of all in my experience. One of those things I learned in practice, was never to update firmware with the amplifier powered up. Once during that process it also happened. |
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Post by 405x5 on Dec 17, 2021 12:57:35 GMT -5
A pop when on/off an amplifier is pretty normal. It certainly can be characteristic of some amplifiers. My “click pop” history goes back 44 years were I to think about it….going back to the Phase Linear 400. That one powered down with a gentle “thump” and the VU meters would do a little dance 💃 in concert. The Carver 1.0t’s. they “sputtered” down, kinda sounding like a washboard when strummed with a stick as a musical instrument! 😱. All of that was exacerbated in the bridged mode. Unfortunately, my pop noise award goes to the Emotiva XMC1. It’s perfect now and has been for years but BEFORE firmware 4.1, it was the most frightening of all in my experience. One of those things I learned in practice, was never to update firmware with the amplifier powered up. Once during that process it also happened. Oops! I realized afterwards, I should clarify since the XMC is of course NOT an amplifier. You’ve got your amplifier pop, and that’s a separate issue from those digital “miscommunications” with preamps and firmware glitches, handshake issues etc. etc…..that make for scary time, AMPLIFIED digital pops. |
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