Headphone Amp to powered speakers

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  1. Posts : 282
    Nexus Windows 10 ENT LTSC 2021 64bit
    Thread Starter
       #11

    sandyt said:
    It doesn't apply to the discussion because the OP is talking about powered speakers, not driving headphones.

    - - - Updated - - -

    The world looked like this in the real world.

    Attachment 387359
    Attachment 387360

    And every single cable they gave you is 6 feet in length. That's how they designed it. If the OP's theory is right that cable length is too long for the voltage, Sony/Panasonic/JVC/RCA would have changed the voltage, period.

    Also the average height of a desk is 30 inches and every single 2.1 computer speakers have you put the subwoofer on the floor. You CANNOT physically connect something from the desktop down to the floor with a 36 inch cable (that's why they all give you a 6 feet cable). So THX must be mad to certify klipsch 2.1 THX computer speakers because the length of 6 foot cable would have destroyed the audio signal.
    I won't continue arguing about length of line level cable. Anyway, nice audio/video setup you have.
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  2. Posts : 1,214
    Windows 10
       #12

    Not my gear, they are just random pictures I found on the internet.

    My point is that the voltage was chosen 50-60 years ago when every single gear is in a different box. The AM/FM radio is in a separate box. The vinyl record player is in a separate box. The equalizer is in a separate box. The cassette tape player is in a different box. The CD player is in a separate box. The amplifier is in a separate box.

    And every single piece of gear is hooked up to the amplifier via a 6 foot audio cable because a 3 foot audio cable would be too short to hook up a stack of hi-fi boxes.

    If the audio signal can't survive because of low voltage, they would have chosen a different voltage because that's how many different boxes were there in the 70's and 80's and you couldn't hook up 5-6 different boxes together with a 3 foot cable.
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  3. Posts : 9,746
    Mac OS Catalina
       #13

    I do not know where you are getting this six foot length from. Every piece of gear sold came with only a 2.5 or 3 foot set of cheap RCA cables.
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  4. Posts : 1,214
    Windows 10
       #14

    Your desk is 30 inches in height. The little detachable usb cable that they include with your smart phone is 30 inches long.

    Remember that the RCA cable tip is rigid and cannot bend so a 36 inch cable has only 30 inches of flexible cable. And you need space on top of your amplifier to dissipate heat so you can't put the next shelf tightly against the amplifier. So how does that work in any hifi hookup where you have more than 2 piece of hifi gear.

    You buy a toslink cable off amazon, that's a a meter long. Anyone that has tried to hook up their toslink cable on their a/v receiver will know how short that cable is. It's a pain to hook up a a meter toslink cable on side by side shelves (left shelf amplifier, right shelf cable box).

    Headphone Amp to powered speakers-s1.png

    Show us a rca cable that short.
    Last edited by sandyt; 13 Mar 2023 at 16:18.
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  5. Posts : 282
    Nexus Windows 10 ENT LTSC 2021 64bit
    Thread Starter
       #15

    sandyt said:
    Not my gear, they are just random pictures I found on the internet.

    My point is that the voltage was chosen 50-60 years ago when every single gear is in a different box. The AM/FM radio is in a separate box. The vinyl record player is in a separate box. The equalizer is in a separate box. The cassette tape player is in a different box. The CD player is in a separate box. The amplifier is in a separate box.

    And every single piece of gear is hooked up to the amplifier via a 6 foot audio cable because a 3 foot audio cable would be too short to hook up a stack of hi-fi boxes.

    If the audio signal can't survive because of low voltage, they would have chosen a different voltage because that's how many different boxes were there in the 70's and 80's and you couldn't hook up 5-6 different boxes together with a 3 foot cable.
    Well, maybe i can share some light with you. the point of line level out is actually interconnect link where cables link from one unit to another at shot distance just like components link to each other inside the computer at limited distance using cables.
    2vrms of low level line out mean max useable length is 1m. There are also unit which able to output 4vrms or 6vrms line level out. Beyond that consider working length and at extreme length it's consider hard working length. And material you playback will contain hidden signal which make you a worker when you listern to such material look enough. No matter how many unit you want to hook up, keep it close so you can link them up using a meter interconnect cable for every single unit unless the unit are high level line output which is 4vrms or 6vrms. Surely you want to enjoy listerning/watching to music/video or playing rather than working. Don't get confused or cheated. Our world we live in is not real and is been control to be in just a way.
    Such things would not function out of the controlled world that we live in.

    sandyt said:
    Your desk is 30 inches in height. The little detachable usb cable that they include with your smart phone is 30 inches long.

    Remember that the RCA cable tip is rigid and cannot bend so a 36 inch cable has only 30 inches of flexible cable. And you need space on top of your amplifier to dissipate heat so you can't put the next shelf tightly against the amplifier. So how does that work in any hifi hookup where you have more than 2 piece of hifi gear.

    You buy a toslink cable off amazon, that's a a meter long. Anyone that has tried to hook up their toslink cable on their a/v receiver will know how short that cable is. It's a pain to hook up a a meter toslink cable on side by side shelves (left shelf amplifier, right shelf cable box).

    Headphone Amp to powered speakers-s1.png

    Show us a rca cable that short.
    I assume you might not been sleeping or eating properly which lead to confusing and loss. Here are some example of some cables you're asking.

    RS PRO Male RCA to Male RCA Aux Cable, Black, 1m | RS

    RS PRO Male RCA to Male RCA Aux Cable, Black, 1m | RS

    https://shopee.sg/product/182364102/...SABEgIZZfD_BwE
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  6. Posts : 282
    Nexus Windows 10 ENT LTSC 2021 64bit
    Thread Starter
       #16

    sandyt said:
    Not my gear, they are just random pictures I found on the internet.

    My point is that the voltage was chosen 50-60 years ago when every single gear is in a different box. The AM/FM radio is in a separate box. The vinyl record player is in a separate box. The equalizer is in a separate box. The cassette tape player is in a different box. The CD player is in a separate box. The amplifier is in a separate box.

    And every single piece of gear is hooked up to the amplifier via a 6 foot audio cable because a 3 foot audio cable would be too short to hook up a stack of hi-fi boxes.

    If the audio signal can't survive because of low voltage, they would have chosen a different voltage because that's how many different boxes were there in the 70's and 80's and you couldn't hook up 5-6 different boxes together with a 3 foot cable.
    Well, maybe i can share some light with you. the point of line level out is actually interconnect link where cables link from one unit to another at shot distance just like components link to each other inside the computer at limited distance using cables.
    2vrms of low level line out mean max useable length is 1m. There are also unit which able to output 4vrms or 6vrms line level out. Beyond that consider working length and at extreme length it's consider hard working length. And material you playback will contain hidden signal which make you a worker when you listern to such material look enough. No matter how many unit you want to hook up, keep it close so you can link them up using a meter interconnect cable for every single unit unless the unit are high level line output which is 4vrms or 6vrms. Surely you want to enjoy listerning/watching to music/video or playing rather than working. Don't get confused or cheated. Our world we live in is not real and is been control to be in just a way.
    Such things would not function out of the controlled world that we live in.

    sandyt said:
    Your desk is 30 inches in height. The little detachable usb cable that they include with your smart phone is 30 inches long.

    Remember that the RCA cable tip is rigid and cannot bend so a 36 inch cable has only 30 inches of flexible cable. And you need space on top of your amplifier to dissipate heat so you can't put the next shelf tightly against the amplifier. So how does that work in any hifi hookup where you have more than 2 piece of hifi gear.

    You buy a toslink cable off amazon, that's a a meter long. Anyone that has tried to hook up their toslink cable on their a/v receiver will know how short that cable is. It's a pain to hook up a a meter toslink cable on side by side shelves (left shelf amplifier, right shelf cable box).

    Headphone Amp to powered speakers-s1.png

    Show us a rca cable that short.
    I assume you might not been sleeping or eating properly which lead to confusing and loss. Here are some example of some cables you're asking.

    RS PRO Male RCA to Male RCA Aux Cable, Black, 1m | RS

    RS PRO Male RCA to Male RCA Aux Cable, Black, 1m | RS

    https://shopee.sg/product/182364102/...SABEgIZZfD_BwE

    For your reading pleasure => Line level - Wikipedia
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  7. Posts : 1,214
    Windows 10
       #17

    Show us a single website that tell us that the effective distance of a 3.5mm audio cable is 1m.

    I showed you a website that tell us that the effective distance is 150 feet (about 50m).

    Consumer electronics audio line level is -10 dBV --- average Root Mean Square voltage is 0.316v. That's the reference audio signal level, what the average sound should be like in terms of voltage when they hook 1 hifi gear to another hifi gear. With your theory, you might as well tell us that any cable longer than 6 inches is no good.

    Line level - Wikipedia

    For computer audio chipsets, realtek maximim output is 1.4v rms (2.92 dBV), which gives it 12.92 dB in headroom (it goes from -10 dBV to 2.92 dBV). That's page 82 (9.3 analog performance section). And that's if you turn the volume all the way up to 100 and then hear an explosion, 1.4v rms. Normal conversation is at 0.3-0.5v rms. Explosion at 1.4v rms.

    http://realtek.info/pdf/ALC885_1-1.pdf

    Newer realtek chipsets like alc1150 has even lower max audio outputs at 1.15v rms (1.21 dBV), so 11.21 dB of headroom. Again that is maximum volume at 100 with the explosion sound. Normal conversation at 0.3-0.5v rms, explosion at 1.15v rms.

    ALC1150.

    PS: you can buy any cable at any length online, that is meaningless. But the cable that came with your cd player, your stereo, your vcr player --- they are all 6 ft in length.
    Last edited by sandyt; 13 Mar 2023 at 20:22.
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  8. Posts : 282
    Nexus Windows 10 ENT LTSC 2021 64bit
    Thread Starter
       #18

    sandyt said:
    Show us a single website that tell us that the effective distance of a 3.5mm audio cable is 1m.

    I showed you a website that tell us that the effective distance is 150 feet (about 50m).

    Consumer electronics audio line level is -10 dBV --- average Root Mean Square voltage is 0.316v. That's the reference audio signal level, what the average sound should be like in terms of voltage when they hook 1 hifi gear to another hifi gear. With your theory, you might as well tell us that any cable longer than 6 inches is no good.

    Line level - Wikipedia

    For computer audio chipsets, realtek maximim output is 1.4v rms (2.92 dBV), which gives it 12.92 dB in headroom (it goes from -10 dBV to 2.92 dBV). That's page 82 (9.3 analog performance section). And that's if you turn the volume all the way up to 100 and then hear an explosion, 1.4v rms. Normal conversation is at 0.3-0.5v rms. Explosion at 1.4v rms.

    http://realtek.info/pdf/ALC885_1-1.pdf

    Newer realtek chipsets like alc1150 has even lower max audio outputs at 1.15v rms (1.21 dBV), so 11.21 dB of headroom. Again that is maximum volume at 100 with the explosion sound. Normal conversation at 0.3-0.5v rms, explosion at 1.15v rms.

    ALC1150.

    PS: you can buy any cable at any length online, that is meaningless. But the cable that came with your cd player, your stereo, your vcr player --- they are all 6 ft in length.
    I have yet to find any website clearly say that effective length of 2v low line level output is max at 1m. You really can't trust everything on the net. It's an eat or be eaten type of world. I actually found out a lot of things including this from someone
    who is an operator at my staying country's Satellite Control type of work. Before this, i was not completely sure. But
    i tested it and even a reduce length of 1.5m from 1.75m 3.5mm cable sound difference. I already ordered a 1m 3.5mm length
    cable to replace my current 1.5m cable.

    Another thing you can take reference is our power line from power plant is 440kv and step down to 220kv at power relay house near my house and step down further to 230v at power switch room for home use. Why ? Because the voltage determine the distance electricity able to travel and ampre determine the size of electrical wire. Another thing i have found out and make correction is the power plug. Mine is 250v 10a uk plug. Spot the difference from what others are using from my photo if you can.

    Headphone Amp to powered speakers-power-plugs.jpg
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  9. Posts : 1,214
    Windows 10
       #19

    Sure, the internet is full of garbage information. But it means only 1 thing in this discussion. If you cannot even find a fellow alien conspiracy theorist to agree with you on the internet, then you are just making stuff out.
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  10. Posts : 282
    Nexus Windows 10 ENT LTSC 2021 64bit
    Thread Starter
       #20

    sandyt said:
    Sure, the internet is full of garbage information. But it means only 1 thing in this discussion. If you cannot even find a fellow alien conspiracy theorist to agree with you on the internet, then you are just making stuff out.
    @sandyt,
    i just happen to find information regarding voltage and current. Hope it helps you.

    CK12-Foundation

    Voltage and Current ( Read ) | Physics
    | CK-12 Foundation
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