Power and ground wiring for amp
Stellar HDF Member
Joined: Feb 2016
Posts: 2,171
Likes: 188
From: Manitowoc county
which amp?
i used 8 ga pwr and grnd to battery, added an aditional ground from hu chassis(14 ga), twisted all 3 together, wrapped them in copper foil tape and maintained perfect fm teception on my aquatic av/cerwin vega B54 combo. was it all the prep work or just luck? no clue but i only wanted to do it once
i used 8 ga pwr and grnd to battery, added an aditional ground from hu chassis(14 ga), twisted all 3 together, wrapped them in copper foil tape and maintained perfect fm teception on my aquatic av/cerwin vega B54 combo. was it all the prep work or just luck? no clue but i only wanted to do it once
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Road Warrior
Joined: Jan 2006
Posts: 1,286
Likes: 17
From: Omaha
Thanks for all of the input and glad I mentioned the 4ga wire. I just wish that I would have mentioned it prior to ordering the 4ga wire and connectors. Other than being harder to work with would the 4ga have a negative effect?
Last edited by Springerfan; Jul 5, 2016 at 10:42 AM.
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From: SF Bay area
The manual in that section is still referring to automotive installation where wire length needs larger gauge due to the longer runs. The 5-6 feet ran on a bike is plenty sufficient to 50 amp draw range in 8g for power and ground. Also twisting will have zero benefit on FM reception. Placebo effect. I have the cheapest crappiest antenna for FM known to man and still pick up few stations running 2 amps and phase 7 headlamp. Run the power on the left side to battery and ground to the right. The arc is well emi shielded and you should have majority of your stations still.
When I put the 4180 in my Limited Low I all but lost AM & FM. Tried the ferrite beads, etc, no help. As a test I hooked the power leads to a lab type 12v power supply.... AM & FM back. The interference was coming from the bike. Twisting the power leads is an old trick learned in my CB radio days... CB (for the most part) is AM and suffers from the same type of interference. I regained probably 75% of my signals.
Going from maybe 10% to 75% is not a placebo effect.
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Also on amazon.com...
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Elite HDF Member
Joined: Aug 2013
Posts: 3,789
Likes: 277
From: Hawkeye state
No unless you wrapped the amp in it then it
zero negative besides size. The Arc is designed for 8g input so twist your wire well.
Class D amplifiers emit emi(radiation) internally in the power rail switching on/off at very high speeds. This creates the emi emitted. Never heard of BT having any FM issues as it has been designed with a good shielded power supply. The input power and ground have nothing to do with the emi and will not increase nor reduce it since all the radiation is coming off the amps circuitry. So Yes twisting wire in this specific case is pointless. To say it changed could have been a poor connection somewhere to antenna location, to who knows. Either case the supplied power and ground connections are irrelevant to the amplifier internal circuit emitted any less emi than the engineer has designed.
When I put the 4180 in my Limited Low I all but lost AM & FM. Tried the ferrite beads, etc, no help. As a test I hooked the power leads to a lab type 12v power supply.... AM & FM back. The interference was coming from the bike. Twisting the power leads is an old trick learned in my CB radio days... CB (for the most part) is AM and suffers from the same type of interference. I regained probably 75% of my signals.
Going from maybe 10% to 75% is not a placebo effect.
__________________________________________________ ____
For ROCKOUT information & purchasing please click the LINKS below...
Going from maybe 10% to 75% is not a placebo effect.
__________________________________________________ ____
For ROCKOUT information & purchasing please click the LINKS below...
Stellar HDF Member
Joined: Feb 2016
Posts: 2,171
Likes: 188
From: Manitowoc county
which amp?
i used 8 ga pwr and grnd to battery, added an aditional ground from hu chassis(14 ga), twisted all 3 together, wrapped them in copper foil tape and maintained perfect fm teception on my aquatic av/cerwin vega B54 combo. was it all the prep work or just luck? no clue but i only wanted to do it once
i used 8 ga pwr and grnd to battery, added an aditional ground from hu chassis(14 ga), twisted all 3 together, wrapped them in copper foil tape and maintained perfect fm teception on my aquatic av/cerwin vega B54 combo. was it all the prep work or just luck? no clue but i only wanted to do it once
No unless you wrapped the amp in it then it
zero negative besides size. The Arc is designed for 8g input so twist your wire well.
Class D amplifiers emit emi(radiation) internally in the power rail switching on/off at very high speeds. This creates the emi emitted. Never heard of BT having any FM issues as it has been designed with a good shielded power supply. The input power and ground have nothing to do with the emi and will not increase nor reduce it since all the radiation is coming off the amps circuitry. So Yes twisting wire in this specific case is pointless. To say it changed could have been a poor connection somewhere to antenna location, to who knows. Either case the supplied power and ground connections are irrelevant to the amplifier internal circuit emitted any less emi than the engineer has designed.
zero negative besides size. The Arc is designed for 8g input so twist your wire well.
Class D amplifiers emit emi(radiation) internally in the power rail switching on/off at very high speeds. This creates the emi emitted. Never heard of BT having any FM issues as it has been designed with a good shielded power supply. The input power and ground have nothing to do with the emi and will not increase nor reduce it since all the radiation is coming off the amps circuitry. So Yes twisting wire in this specific case is pointless. To say it changed could have been a poor connection somewhere to antenna location, to who knows. Either case the supplied power and ground connections are irrelevant to the amplifier internal circuit emitted any less emi than the engineer has designed.
Elite HDF Member
Joined: Aug 2013
Posts: 3,789
Likes: 277
From: Hawkeye state
When I put the 4180 in my Limited Low I all but lost AM & FM. Tried the ferrite beads, etc, no help. As a test I hooked the power leads to a lab type 12v power supply.... AM & FM back. The interference was coming from the bike. Twisting the power leads is an old trick learned in my CB radio days... CB (for the most part) is AM and suffers from the same type of interference. I regained probably 75% of my signals.
Going from maybe 10% to 75% is not a placebo effect.
__________________________________________________ ____
For ROCKOUT information & purchasing please click the LINKS below...
Going from maybe 10% to 75% is not a placebo effect.
__________________________________________________ ____
For ROCKOUT information & purchasing please click the LINKS below...
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Road Warrior
Joined: Jan 2006
Posts: 1,286
Likes: 17
From: Omaha
"zero negative besides size. The Arc is designed for 8g input so twist your wire well."
Thanks Slye, Very curious about the discrepancy in the manual but I have placed another order for 8ga wire and ends. SF
Thanks Slye, Very curious about the discrepancy in the manual but I have placed another order for 8ga wire and ends. SF
Sponsor
Joined: Jul 2015
Posts: 8,538
Likes: 1,646
From: SF Bay area
Class D amplifiers emit emi(radiation) internally in the power rail switching on/off at very high speeds. This creates the emi emitted. Never heard of BT having any FM issues as it has been designed with a good shielded power supply. The input power and ground have nothing to do with the emi and will not increase nor reduce it since all the radiation is coming off the amps circuitry. So Yes twisting wire in this specific case is pointless. To say it changed could have been a poor connection somewhere to antenna location, to who knows. Either case the supplied power and ground connections are irrelevant to the amplifier internal circuit emitted any less EMI than the engineer has designed.
Another hint that led me to the power leads...
I would have the system powered up and tuned to what should be a strong station.... no reception. Unplug the power lead from the amp, and for just a second before the amp powered down the signal would come in strong.
Twisting power leads in radio communications systems is well documented.
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Road Captain
Joined: Oct 2012
Posts: 538
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From: Dallas
which amp?
i used 8 ga pwr and grnd to battery, added an aditional ground from hu chassis(14 ga), twisted all 3 together, wrapped them in copper foil tape and maintained perfect fm teception on my aquatic av/cerwin vega B54 combo. was it all the prep work or just luck? no clue but i only wanted to do it once
i used 8 ga pwr and grnd to battery, added an aditional ground from hu chassis(14 ga), twisted all 3 together, wrapped them in copper foil tape and maintained perfect fm teception on my aquatic av/cerwin vega B54 combo. was it all the prep work or just luck? no clue but i only wanted to do it once
I bought the Arc MC amp hookup kit for the 600.4 and it came with #8 power and ground
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Road Warrior
Joined: Jan 2006
Posts: 1,286
Likes: 17
From: Omaha
I don't have the amp in my hands yet, I ordered it from LL a week ago last Friday so I expect it any day. I was going by the Arc 600.4 instructions which state 4ga minimum in one place and 8ga minimum in another. I ordered 8ga after reading Slye and others responses so I should be good. I thought the twisted power and ground wire question was an interesting one but apparently it has no basis.
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