Which Amplifier for Outdoor Speakers

Spootage on 07/03/2025 - 11:10

I have bought four NS-AW592 Yamaha speakers to use outdoors.

https://au.yamaha.com/en/products/audio_visual/speakers/ns-a…

(They come in boxes of 2, so that's 2 boxes, 4 speakers).

The specs are as follows:

Woofer 16cm waterproof cone
Tweeter 2.5cm fluid-cooled, coated soft dome
Nominal Input Power 50 W
Maximum Input Power 150 W
Frequency Response 55 Hz–20 kHz
Sensitivity 88 dB/2.83 V/1 m
Impedance 6 ohms
Dimensions (W x H x D) 206 x 340 x 170 mm
Weight 2.4 kg/unit

My question is, which amplifier would you recommend to drive these speakers? I want it to be Bluetooth, as all I will be doing is playing music from my phone. The amp does not need to connect to any other sources. eg TV.

Would this be sufficient: https://www.amazon.com.au/Fosi-Audio-HT4S-Bluetooth-Amplifie…?

Thanks!

Electrical & Electronics Amplifier

Comments

  • Protractor on 07/03/2025 - 11:30
    +1

    Whatever amp you get, don't be 'that guy' with the outside music. Especially the subwoofer/bass output. Consider your neighbours.

    • Spootage on 07/03/2025 - 11:33

      Yeah, I haven't bought a sub for that exact reason. I don't want to be 'that guy' so will be keeping the volume at appropriate levels.

      • Protractor on 07/03/2025 - 11:33
        -1

        Legend

      • jv on 07/03/2025 - 12:44
        -3

        so will be keeping the volume at appropriate levels.

        Then don't use an amp.

        • Spootage on 07/03/2025 - 12:54
          +1

          How else do I power and use the speakers?

          From Google: To power and use passive speakers, you need to connect them to an external amplifier using speaker cables, as passive speakers do not have a built-in amplifier and require a separate power source to function; simply connect the speaker wire from the amplifier's output to the binding posts on the back of the passive speaker.

          • jv on 07/03/2025 - 13:11
            -1

            @Spootage:

            How else do I power and use the speakers?

            Music source.

            • Spootage on 07/03/2025 - 14:47

              @jv: You want me to play music via my phone and bypass the speakers?

      • rumblytangara on 07/03/2025 - 16:32
        +1

        Not sure what 'appropriate levels' means, but in my opinion anyone who plays music loud enough to be heard even by an immediate neighbour is 'that guy.' In my area the only times I've heard outdoor music would have been NYE or similar.

        My kids in primary school keep asking why some cars drive past with their windows down and music loud enough to be heard from the footpath and I force myself to give a more polite answer than 'they are immature assholes.'

  • Gunnar on 07/03/2025 - 12:50

    That would work. You could also look at second hand stuff of it only a sh.t kicker amp that you’re after

    • Baysew on 07/03/2025 - 16:06

      Not likely to find one with BT capability.

      That what makes the Fosi amp (see below pwnd) compelling. Also new, small and power efficient.

  • snapper17 on 07/03/2025 - 12:58

    Do Yamaha make an appropriate matching amp?

    • sumyungguy on 07/03/2025 - 16:19

      RX-V4A supports Zone A and Zone B speakers

  • pwnd on 07/03/2025 - 13:37
    +2

    Fosi make nice well priced bluetooth amps that do come in 4 chanel.
    I currently use their 2 chanel amp for some indoor speakers and they are great and well priced

    https://www.amazon.com.au/Fosi-Audio-HT4S-Bluetooth-Amplifie…

    • Spootage on 07/03/2025 - 13:54

      Perfect. That's the exact one I have been considering.

  • joka on 07/03/2025 - 15:50

    I've been eyeing this for a bit, the Ubiquiti UniFi Play PowerAmp. But you have four speakers, so you want four separate channels or just stereo over two speakers?

    • Spootage on 07/03/2025 - 16:21

      I'd be happy with stereo. It doesn't need to be surround sound.

  • rumblytangara on 07/03/2025 - 16:21

    That's a nominal 50W nominal, 150W max 6 Ohm speaker the amp is 30W per channel. Amp maxing at 50W at 4 Ohms.

    This doesn't look like an ideal mix unless you plan to run the speakers really quietly. And even then an audiophile is probably going to look at this and say that the amp is woefully mismatched (I honestly don't know, I haven't tried mismatching gear like this before)

    • Spootage on 07/03/2025 - 16:25

      Yeah, that's where I get lost, hence the thread asking for help to choose an adequate amp :)

      • rumblytangara on 07/03/2025 - 16:34
        +1

        Match impedance, then make sure that amp channel wattage is in excess of nominal speaker wattage by some arbitrary margin.

        The amp you posted doesn't match either criteria, I'd pass.

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