Lol. Or try turning the gains down first! :p
P PENG Audioholic Slumlord Jun 5, 2017 #102 Pogre said: Lol. Or try turning the gains down first! Click to expand... He already promised to do it as soon as he gets home. I just wanted to give him the next assignment. By the way if it is ground potential related, it won't be affected by the gain. You might have missed, he did say the noise was independent of the volume position (AVR), doing the same with the gain knob at the power amp will therefore likely have little effect because the current flow through the unintentional ground path typically bypasses the amplifier gain control circuits. Last edited: Jun 5, 2017
Pogre said: Lol. Or try turning the gains down first! Click to expand... He already promised to do it as soon as he gets home. I just wanted to give him the next assignment. By the way if it is ground potential related, it won't be affected by the gain. You might have missed, he did say the noise was independent of the volume position (AVR), doing the same with the gain knob at the power amp will therefore likely have little effect because the current flow through the unintentional ground path typically bypasses the amplifier gain control circuits.
Pogre Audioholic Slumlord Jun 5, 2017 #103 PENG said: He already promised to do it as soon as he gets home. I just wanted to give him the next assignment. By the way if it is ground potential related, it won't be affected by the gain. You might have missed, he did say the noise was independent of the volume position (AVR), doing the same with the gain knob at the power amp will therefore likely have little effect because the current flow through the unintentional ground path typically bypasses the amplifier circuits. Click to expand... It's not even about fixing the hum any more for me. It's personal now... j/k. Your advice is always solid and your knowledge goes a lot deeper than mine. If it is ground loop I know gains or volume controls won't do much.
PENG said: He already promised to do it as soon as he gets home. I just wanted to give him the next assignment. By the way if it is ground potential related, it won't be affected by the gain. You might have missed, he did say the noise was independent of the volume position (AVR), doing the same with the gain knob at the power amp will therefore likely have little effect because the current flow through the unintentional ground path typically bypasses the amplifier circuits. Click to expand... It's not even about fixing the hum any more for me. It's personal now... j/k. Your advice is always solid and your knowledge goes a lot deeper than mine. If it is ground loop I know gains or volume controls won't do much.
KEW Audioholic Overlord Jun 5, 2017 #104 PENG said: He already promised to do it as soon as he gets home. I just wanted to give him the next assignment. By the way if it is ground potential related, it won't be affected by the gain. You might have missed, he did say the noise was independent of the volume position (AVR), doing the same with the gain knob at the power amp will therefore likely have little effect because the current flow through the unintentional ground path typically bypasses the amplifier circuits. Click to expand... Thanks for that tidbit! Makes sense, but I really had not thought about that aspect!
PENG said: He already promised to do it as soon as he gets home. I just wanted to give him the next assignment. By the way if it is ground potential related, it won't be affected by the gain. You might have missed, he did say the noise was independent of the volume position (AVR), doing the same with the gain knob at the power amp will therefore likely have little effect because the current flow through the unintentional ground path typically bypasses the amplifier circuits. Click to expand... Thanks for that tidbit! Makes sense, but I really had not thought about that aspect!
P PENG Audioholic Slumlord Jun 5, 2017 #105 Pogre said: It's not even about fixing the hum any more for me. It's personal now... j/k. Click to expand... Believe me, I knew, that's normal.....
Pogre said: It's not even about fixing the hum any more for me. It's personal now... j/k. Click to expand... Believe me, I knew, that's normal.....
RichB Audioholic Field Marshall Jun 5, 2017 #106 Irvrobinson said: The power amp(s) should always be switched on last and switched off first. Click to expand... That doesn't always help with ATI amps that can play for 10 seconds or more after the power is cut - Rich
Irvrobinson said: The power amp(s) should always be switched on last and switched off first. Click to expand... That doesn't always help with ATI amps that can play for 10 seconds or more after the power is cut - Rich
H Hetfield Audioholic Samurai Jun 5, 2017 #107 Two things apparently the Parasound amp has a soft or slow power up so it won't hurt your speakers no matter how you turn it on. Second thing is I unplugged the coax into the Direct TV receiver and hum/buzz was still there. I then went to that HT store nearby, and got those cheater plugs and hum gone. Now this is not the solution I wanted, but it worked. I was thinking maybe this will do the trick and ditch the "cheater plug", https://www.amazon.com/gp/product/B0002E4YI8/ref=s9u_simh_gw_i2?ie=UTF8&fpl=fresh&pd_rd_i=B0002E4YI8&pd_rd_r=N08SY57Z2MDPNYV6SZR0&pd_rd_w=oy8Uv&pd_rd_wg=Tc15R&pf_rd_m=ATVPDKIKX0DER&pf_rd_s=&pf_rd_r=NBZHXPRWH3981KB0Y7F9&pf_rd_t=36701&pf_rd_p=781f4767-b4d4-466b-8c26-2639359664eb&pf_rd_i=desktop What do you think? Also I did try the turn down gains on all the channels on the back of the amp and it did minimize but did not eliminate the hum/buzz. Thanks for all the help today.
Two things apparently the Parasound amp has a soft or slow power up so it won't hurt your speakers no matter how you turn it on. Second thing is I unplugged the coax into the Direct TV receiver and hum/buzz was still there. I then went to that HT store nearby, and got those cheater plugs and hum gone. Now this is not the solution I wanted, but it worked. I was thinking maybe this will do the trick and ditch the "cheater plug", https://www.amazon.com/gp/product/B0002E4YI8/ref=s9u_simh_gw_i2?ie=UTF8&fpl=fresh&pd_rd_i=B0002E4YI8&pd_rd_r=N08SY57Z2MDPNYV6SZR0&pd_rd_w=oy8Uv&pd_rd_wg=Tc15R&pf_rd_m=ATVPDKIKX0DER&pf_rd_s=&pf_rd_r=NBZHXPRWH3981KB0Y7F9&pf_rd_t=36701&pf_rd_p=781f4767-b4d4-466b-8c26-2639359664eb&pf_rd_i=desktop What do you think? Also I did try the turn down gains on all the channels on the back of the amp and it did minimize but did not eliminate the hum/buzz. Thanks for all the help today.
Irvrobinson Audioholic Spartan Jun 5, 2017 #108 RichB said: That doesn't always help with ATI amps that can play for 10 seconds or more after the power is cut - Rich Click to expand... So wait 10 seconds!
RichB said: That doesn't always help with ATI amps that can play for 10 seconds or more after the power is cut - Rich Click to expand... So wait 10 seconds!
RichB Audioholic Field Marshall Jun 5, 2017 #109 Irvrobinson said: So wait 10 seconds! Click to expand... Sort of defeats the whole trigger thing. The ATI6000's don't pop when the system is turned off. If it aint broke... - Rich
Irvrobinson said: So wait 10 seconds! Click to expand... Sort of defeats the whole trigger thing. The ATI6000's don't pop when the system is turned off. If it aint broke... - Rich
lovinthehd Audioholic Jedi Jun 5, 2017 #110 I use a smart strip so when my avr starts up it also starts up three sub amps, that in my Epik Empire plus my diy subs via XLS1500 amps. I think all have soft start circuitry. Not a problem in initializing the system....
I use a smart strip so when my avr starts up it also starts up three sub amps, that in my Epik Empire plus my diy subs via XLS1500 amps. I think all have soft start circuitry. Not a problem in initializing the system....
P PENG Audioholic Slumlord Jun 5, 2017 #111 Hetfield said: Two things apparently the Parasound amp has a soft or slow power up so it won't hurt your speakers no matter how you turn it on. Second thing is I unplugged the coax into the Direct TV receiver and hum/buzz was still there. I then went to that HT store nearby, and got those cheater plugs and hum gone. Now this is not the solution I wanted, but it worked. I was thinking maybe this will do the trick and ditch the "cheater plug", https://www.amazon.com/gp/product/B0002E4YI8/ref=s9u_simh_gw_i2?ie=UTF8&fpl=fresh&pd_rd_i=B0002E4YI8&pd_rd_r=N08SY57Z2MDPNYV6SZR0&pd_rd_w=oy8Uv&pd_rd_wg=Tc15R&pf_rd_m=ATVPDKIKX0DER&pf_rd_s=&pf_rd_r=NBZHXPRWH3981KB0Y7F9&pf_rd_t=36701&pf_rd_p=781f4767-b4d4-466b-8c26-2639359664eb&pf_rd_i=desktop What do you think? Also I did try the turn down gains on all the channels on the back of the amp and it did minimize but did not eliminate the hum/buzz. Thanks for all the help today. Click to expand... I mentioned the Parasound soft start in post#13, but you should still turn it on last and off first. It is just good practice. Again, the cheater plug is not recommended, take the time to find and isolate the source of the hum. The hum x you linked is not rated high enough for the 1205A.
Hetfield said: Two things apparently the Parasound amp has a soft or slow power up so it won't hurt your speakers no matter how you turn it on. Second thing is I unplugged the coax into the Direct TV receiver and hum/buzz was still there. I then went to that HT store nearby, and got those cheater plugs and hum gone. Now this is not the solution I wanted, but it worked. I was thinking maybe this will do the trick and ditch the "cheater plug", https://www.amazon.com/gp/product/B0002E4YI8/ref=s9u_simh_gw_i2?ie=UTF8&fpl=fresh&pd_rd_i=B0002E4YI8&pd_rd_r=N08SY57Z2MDPNYV6SZR0&pd_rd_w=oy8Uv&pd_rd_wg=Tc15R&pf_rd_m=ATVPDKIKX0DER&pf_rd_s=&pf_rd_r=NBZHXPRWH3981KB0Y7F9&pf_rd_t=36701&pf_rd_p=781f4767-b4d4-466b-8c26-2639359664eb&pf_rd_i=desktop What do you think? Also I did try the turn down gains on all the channels on the back of the amp and it did minimize but did not eliminate the hum/buzz. Thanks for all the help today. Click to expand... I mentioned the Parasound soft start in post#13, but you should still turn it on last and off first. It is just good practice. Again, the cheater plug is not recommended, take the time to find and isolate the source of the hum. The hum x you linked is not rated high enough for the 1205A.
AcuDefTechGuy Audioholic Jedi Jun 7, 2017 #112 RichB said: That doesn't always help with ATI amps that can play for 10 seconds or more after the power is cut - Rich Click to expand... Yeah, I noticed that on my ATI amps too. I have to wait about 10 seconds before doing anything else.
RichB said: That doesn't always help with ATI amps that can play for 10 seconds or more after the power is cut - Rich Click to expand... Yeah, I noticed that on my ATI amps too. I have to wait about 10 seconds before doing anything else.
H Hetfield Audioholic Samurai Jun 7, 2017 #113 PENG said: I mentioned the Parasound soft start in post#13, but you should still turn it on last and off first. It is just good practice. Again, the cheater plug is not recommended, take the time to find and isolate the source of the hum. The hum x you linked is not rated high enough for the 1205A. Click to expand... Yes you did say that in a post. I just confirmed it and you can tell by the way it starts up. Sent from my Pixel using Tapatalk
PENG said: I mentioned the Parasound soft start in post#13, but you should still turn it on last and off first. It is just good practice. Again, the cheater plug is not recommended, take the time to find and isolate the source of the hum. The hum x you linked is not rated high enough for the 1205A. Click to expand... Yes you did say that in a post. I just confirmed it and you can tell by the way it starts up. Sent from my Pixel using Tapatalk
AcuDefTechGuy Audioholic Jedi Jun 7, 2017 #114 Hetfield said: ...got those cheater plugs and hum gone... Click to expand... At least now we have confirmed that it's ground-hum.
Hetfield said: ...got those cheater plugs and hum gone... Click to expand... At least now we have confirmed that it's ground-hum.
H Hetfield Audioholic Samurai Jun 7, 2017 #115 AcuDefTechGuy said: At least now we have confirmed that it's ground-hum. Click to expand... Yeah so what's the next step in solving the issue without the cheater plug? Sent from my Pixel using Tapatalk
AcuDefTechGuy said: At least now we have confirmed that it's ground-hum. Click to expand... Yeah so what's the next step in solving the issue without the cheater plug? Sent from my Pixel using Tapatalk
AcuDefTechGuy Audioholic Jedi Jun 7, 2017 #116 PENG said: ...perhaps he meant use it in conjunction with the "cheater plug" but I will still say DO NOT do it. Click to expand... In my previous house, I could not solve the ground hum issue, so I used the cheater plug + GFCI, which is still not advised, but I did it anyway. Fortunately for me, I no longer have the ground hum issue in my new custom house.
PENG said: ...perhaps he meant use it in conjunction with the "cheater plug" but I will still say DO NOT do it. Click to expand... In my previous house, I could not solve the ground hum issue, so I used the cheater plug + GFCI, which is still not advised, but I did it anyway. Fortunately for me, I no longer have the ground hum issue in my new custom house.
H Hetfield Audioholic Samurai Jun 7, 2017 #117 AcuDefTechGuy said: In my previous house, I could not solve the ground hum issue, so I used the cheater plug + GFCI, which is still not advised, but I did it anyway. Fortunately for me, I no longer have the ground hum issue in my new custom house. Click to expand... At the moment mine is solved too and the amp sounds incredible. Better dynamics, channels seem better separated and the reserve power is what is really awesome. It belts out those peaks without breaking a sweat. Clean, dynamic power is what that amp gives. It's as neutral as can be. It ain't warm and it ain't bright, it's pretty perfect. I'm very impressed. Sent from my Pixel using Tapatalk
AcuDefTechGuy said: In my previous house, I could not solve the ground hum issue, so I used the cheater plug + GFCI, which is still not advised, but I did it anyway. Fortunately for me, I no longer have the ground hum issue in my new custom house. Click to expand... At the moment mine is solved too and the amp sounds incredible. Better dynamics, channels seem better separated and the reserve power is what is really awesome. It belts out those peaks without breaking a sweat. Clean, dynamic power is what that amp gives. It's as neutral as can be. It ain't warm and it ain't bright, it's pretty perfect. I'm very impressed. Sent from my Pixel using Tapatalk
AcuDefTechGuy Audioholic Jedi Jun 7, 2017 #118 Hetfield said: Yeah so what's the next step in solving the issue without the cheater plug? Sent from my Pixel using Tapatalk Click to expand... That is PLAN A. Hopefully you can to that. If you CANNOT do that, then you have a dilemma - use the Cheater Plug + GFCI against engineering advice or return the amp and use an AVR. Last edited: Jun 7, 2017
Hetfield said: Yeah so what's the next step in solving the issue without the cheater plug? Sent from my Pixel using Tapatalk Click to expand... That is PLAN A. Hopefully you can to that. If you CANNOT do that, then you have a dilemma - use the Cheater Plug + GFCI against engineering advice or return the amp and use an AVR.
P PENG Audioholic Slumlord Jun 7, 2017 #119 AcuDefTechGuy said: That is PLAN A. Hopefully you can to that. If you CANNOT do that, then you have a dilemma - use the Cheater Plug + GFCI against engineering advice or return the amp and use an AVR. Click to expand... He can try to tie the chassis (non insulated part) of the Parasound and the Yamaha with a short wire. Gene mentioned in one of his review and it worked for him. Otherwise, if the loop is due to the different "ground" potential between the preamp and the amp, then he will need some costly solution (around $100?). If the issue comes from one of the source connected to the Yamaha then there are cheap isolation device he can buy once he identified the source by process of elimination. He doesn't seem to want to do it and I won't push it anymore because based on what he said so far, I think the issue is most likely due to the different ground potential between the Yamaha itself and the Parasound amp.
AcuDefTechGuy said: That is PLAN A. Hopefully you can to that. If you CANNOT do that, then you have a dilemma - use the Cheater Plug + GFCI against engineering advice or return the amp and use an AVR. Click to expand... He can try to tie the chassis (non insulated part) of the Parasound and the Yamaha with a short wire. Gene mentioned in one of his review and it worked for him. Otherwise, if the loop is due to the different "ground" potential between the preamp and the amp, then he will need some costly solution (around $100?). If the issue comes from one of the source connected to the Yamaha then there are cheap isolation device he can buy once he identified the source by process of elimination. He doesn't seem to want to do it and I won't push it anymore because based on what he said so far, I think the issue is most likely due to the different ground potential between the Yamaha itself and the Parasound amp.
P PENG Audioholic Slumlord Jun 7, 2017 #120 AcuDefTechGuy said: That is PLAN A. Hopefully you can to that. If you CANNOT do that, then you have a dilemma - use the Cheater Plug + GFCI against engineering advice or return the amp and use an AVR. Click to expand... To be clear, a properly installed and testd GFCI for use with a cheater plug can mitigate the risk associated with ground fault, but it will still be against code/manufacturer's instructions, hence the term "cheater" I guess..
AcuDefTechGuy said: That is PLAN A. Hopefully you can to that. If you CANNOT do that, then you have a dilemma - use the Cheater Plug + GFCI against engineering advice or return the amp and use an AVR. Click to expand... To be clear, a properly installed and testd GFCI for use with a cheater plug can mitigate the risk associated with ground fault, but it will still be against code/manufacturer's instructions, hence the term "cheater" I guess..
