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  • Outdoor Speaker Setup Advice

    Outdoor Speaker Setup Advice:
    I just don't understand Ohms and watts. Don't want to under or over power. I was planning to use an Apple Airport Express to an amp setup. Kids can make iTunes playlists and it will be fairly simple and play nice in Apple ecosystem. Idea to me cost effective and small if possible.
    video link - https://www.youtube.com/watch?v=jUXWpeEqoSU&app=desktop

    I have 2 sets of speakers I would like to use outside.

    Set 1:
    Bose 101 Music Monitor
    Power Handling: 10-60 WRMS
    Power Rating: 40 Watts IEC
    Impedance: 4 Ohms IEC

    Set 2:
    Klipsch KSB 1.1
    RMS Power: 75W
    Peak Power Handling300W
    Sensitivity92dB
    Impedance8ohm
    Frequency Responses65Hz-20kHz

    My question is how big of an amp do I need?
    I read that I can use something small like this 20W amp.
    https://www.amazon.com/Lepy-LP-2020A-D…/…/ref=dp_ob_title_ce
    But I wondered if it had enough power.

    Is this 90W amp a better option?
    https://www.amazon.com/dp/B0071HZ5LE..._t3_B00C2P61FO

    Also would a speaker selector switch be necessary?
    https://www.parts-express.com/pyle-pss4-4-channel-stereo-sp…
    I don't see a time when I would need 2 of the 4 speakers on, but didn't know if it would help split but not degrade power.

    Thanks for any advice.

  • #2
    20 watts is insufficient.
    "Not a Speaker Designer - Not even on the Internet"
    “Pride is your greatest enemy, humility is your greatest friend.”
    "If the freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter."

    Comment


    • #3
      If possible, I did want to run all 4 speakers at the same time.
      Or will that not work due to the difference in ohms?
      2 to one side of the house, 2 to the other side of the house.
      If this is the case, is the speaker selector still necessary?
      What purpose does the speaker selector serve?
      Will a 4 ohm stable amp work for all 4 speakers?
      How many watt amp would you recommend?
      Something like this (45W & 2-ohm stable)?https://www.parts-express.com/lepai-lp-269fs-4x45w-mini.

      Comment


      • #4
        If possible, I did want to run all 4 speakers at the same time.
        In that case I'd use something that offer impedance balancing and perhaps volume controls to compensation for anticipated differences in speaker loudness.
        fwiw: I'd use a power level greater than speaker power rating.

        one example
        * https://www.parts-express.com/audtek...8-out--300-974
        "Not a Speaker Designer - Not even on the Internet"
        “Pride is your greatest enemy, humility is your greatest friend.”
        "If the freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter."

        Comment


        • #5
          What's your budget?

          I'd go for two of the most powerful class-D mini-amps I can afford, and then just use y-jacks to connect the same input to both, if using a wired connection.
          Brian Steele
          www.diysubwoofers.org

          Comment


          • #6
            Brian's alternative would work well in this setting - money that would be spent on a good switch unit could go to an amp for a more modular setup that avoids the impedance issue impedance
            "Not a Speaker Designer - Not even on the Internet"
            “Pride is your greatest enemy, humility is your greatest friend.”
            "If the freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter."

            Comment


            • #7
              $60-ish for amps
              2 of these? https://www.amazon.com/dp/B0071HZ5RI/ref=cm_sw_su_dp

              Would you also recommend a Speaker Selector with Impedance Matching like this?
              https://www.parts-express.com/audtek...6-out--300-972

              or 2 slightly different amps custom to Ohms needed for speakers would mean avoiding the impedance issue ?

              Comment


              • #8
                fwiw - I don't touch Pyle and not a Class-T fan.
                The SS8 has higher power rating
                "Not a Speaker Designer - Not even on the Internet"
                “Pride is your greatest enemy, humility is your greatest friend.”
                "If the freedom of speech is taken away, then dumb and silent we may be led, like sheep to the slaughter."

                Comment


                • #9
                  Seconded, that amp has nowhere near 100 actual watts. Your price range needs to come up a bit unless you'd like to put together some kit boards and a power supply. Sent from my SM-G960U using Tapatalk
                  Electronics engineer, woofer enthusiast, and musician.
                  Wogg Music

                  Comment


                  • #10
                    I like the class-T Dayton amp that I bought for my daughter's room system, however here's one other option that's worth considering - find a cheap Dolby Digital receiver that has an All-Channel Stereo mode. Those receivers usually have five channels of output, and you can set it to the "All Channel Stereo" mode use the two main channels to power one pair of speakers, and the two surround channels to power the other pair. If you don't mind second-hand, there should be tons available on eBay. And if you want to add a powered subwoofer later, that should be easy to do as well.

                    Brian Steele
                    www.diysubwoofers.org

                    Comment

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