Worth restating.

Found this in a 1984 advert for Harmon Kardon:

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Comments

  • VR3
    VR3 Posts: 25,607
    100%, been saying it for years, it's all about the current.
    - Not Tom

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
  • motorstereo
    motorstereo Posts: 1,792
    So.........I'm wondering how much current is considered adequate and is it all created equally? Is tube current the same as ss current?
  • SeleniumFalcon
    SeleniumFalcon Posts: 2,133
    edited May 12
    "I'm wondering how much current is considered adequate "

    An example might help. Current (amperes) is equal to the square root of the power (watts) divided by the impedance (ohms). So, if we look at producing 350 watts into an 8 ohm speaker that would be the square root of 350/8 which would be 6.6 amperes times 2 (for stereo) which would be 13.2 amperes. This would be for an RMS measurement the peak requirement would be 18.7 amperes (Peak Current = RMS Current x 1.414). So with a power of 350 watts into an 8 ohm impedance the peak stereo demand would be 19 or 20 amperes.
  • Tony M
    Tony M Posts: 10,438
    I'm glad I put 14 gauge wire and 20 amp rated outlets in my cottage. :p
    Most people just listen to music and watch movies. I EXPERIENCE them.
  • michaeljhsda2
    michaeljhsda2 Posts: 2,051
    Tony M wrote: »
    I'm glad I put 14 gauge wire and 20 amp rated outlets in my cottage. :p

    :s
    SDA SRS 1.2TL's
    SDA 1C's w/Clarity Cap ESA; PA, Mills, RD0194-1's
    SDA 2B TL's w/RD0198-1's
    Yaqin MC-30L integrated tube amp
    Yaqin MS-20L integrated tube amp
  • pitdogg2
    pitdogg2 Posts: 20,805
    Tony M wrote: »
    I'm glad I put 14 gauge wire and 20 amp rated outlets in my cottage. :p

    So now your wire is the fuse....should you plug a 20amp something into it.
  • VR3
    VR3 Posts: 25,607
    Anything less than 200 Amps is not enough😅
    - Not Tom

    "No, that's silly talk. Dude, you can't possibly be this audio dumb so quit the act." - Doro
  • motorstereo
    motorstereo Posts: 1,792
    VR3 wrote: »
    Anything less than 200 Amps is not enough😅

    "how much current does a mcintosh mc1201 have?"
    200 Amperes
    McIntosh MC1201 Amplifiers DESCRIPTION 1200 Watt Mono Power Amplifier Double Balanced, Push/Pull Design Full Power into 2, 4, or 8 ohms 200 Amperes of Output Current

    Wow I cut it pretty close there.
  • Tony M
    Tony M Posts: 10,438
    edited May 12
    pitdogg2 wrote: »
    Tony M wrote: »
    I'm glad I put 14 gauge wire and 20 amp rated outlets in my cottage. :p

    So now your wire is the fuse....should you plug a 20amp something into it.

    Maybe I used 12 gauge. ;)

    I'll get back to you guys sometime in the future.
    Most people just listen to music and watch movies. I EXPERIENCE them.
  • heiney9
    heiney9 Posts: 24,296
    .......and the 1st watt is the most important

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass

    Pass Aleph 30 | EE Avant Pre | EE Mini Max Plus DAC | MIT Shotgun S3 | MIT Z P/C's | updated SDA 1C| SQ Box Touch/Welbourne Labs P/S- Tubes add soul!
  • mhardy6647
    mhardy6647 Posts: 29,760
    heiney9 wrote: »
    .......and the 1st watt is the most important

    H9

    ... or the first 100 milliwatts for those of us with 104-ish dB/watt @ 1 meter loudspeakers. ;)
  • Viking64
    Viking64 Posts: 5,734
    edited May 12
    Yeah, 14-gauge wire is for lighting circuits. It's only real value is being able to have an acceptable number of conductors in a switch box to follow code.

    Receptacles should have 20-amp breakers and 12-gauge wire. For a dedicated power amp circuit, I would recommend 30-amp breakers and 10-gauge wire.
  • F1nut
    F1nut Posts: 47,063
    I would recommend 30-amp breakers and 10-gauge wire.
    I absolutely agree, but be aware that will not pass code, so have a 20 amp breaker stored away for the day you sell your house.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."


    President of Club Polk

  • BlueFox
    BlueFox Posts: 15,234
    I have three 20 amp lines with 10 gauge wires. Two of the lines are for the amps (one line for each amp), and the third is for the other gear. Before I put each amp on its own line I kept popping the breaker on the circuit for the amps. After adding another line so that each amp had its own line I no longer popped any breakers. However, I did break both speakers one night, but the amps kept on working.
    Lumin X1 file player, Westminster Labs interconnect cable
    Sony XA-5400ES SACD; Pass XP-22 pre; X600.5 amps
    Magico S5 MKII Mcast Rose speakers; SPOD spikes

    Shunyata Triton v3/Typhon QR on source, Denali 2000 (2) on amps
    Shunyata Sigma XLR analog ICs, Sigma speaker cables
    Shunyata Sigma HC (2), Sigma Analog, Sigma Digital, Z Anaconda (3) power cables

    Mapleshade Samson V.3 four shelf solid maple rack, Micropoint brass footers
    Three 20 amp circuits.
  • maxward
    maxward Posts: 1,152
    What was the cost of the fix for the Magicos?
  • BlueFox
    BlueFox Posts: 15,234
    I have forgotten the cost of the drivers. Probably a few hundred dollars for each one.
    Lumin X1 file player, Westminster Labs interconnect cable
    Sony XA-5400ES SACD; Pass XP-22 pre; X600.5 amps
    Magico S5 MKII Mcast Rose speakers; SPOD spikes

    Shunyata Triton v3/Typhon QR on source, Denali 2000 (2) on amps
    Shunyata Sigma XLR analog ICs, Sigma speaker cables
    Shunyata Sigma HC (2), Sigma Analog, Sigma Digital, Z Anaconda (3) power cables

    Mapleshade Samson V.3 four shelf solid maple rack, Micropoint brass footers
    Three 20 amp circuits.