Nobsound NS-15G Bluetooth Amplifier, Mini 200W Amp, TPA3116 Chip, HiFi Stereo Class D 2.0 Channels, with Power Supply

I have FIVE of these little amps powering 10 ceiling speakers in my house. Each connected to an Amazon Echo Input providing multiroom audio via Alexa. I had initially planned to expand my gen 1 Sonos setup which cost me over a grand, but Sonos lost me when they threatening to brick the gen 1 stuff. I sold it all and won't be buying any more! Not only that, I find it ridiculous at how much Sonos charges for their amps. £600? No thanks! I've basically saved myself £3k. Each zone in this setup costs me £70 (£350 overall). Okay, so Amazon hasn't fully matured its multiroom audio capabilities to fully compete with Sonos. After all, it is a cloud-based platform, whereas Sonos is mesh-based (Sonosnet), giving them the upper-hand. With that said, Amazon Alexa / Echo still functions reasonably well for multiroom audio. There are just a few issues that I've outlined below. + Speaker groups have no independent volume control (just group control). You have to disconnect from the speaker group, connect to the Echo that needs volume adjustment, then reconnect to the speaker group. Speaker groups cannot be chosen on the fly while you're playing music. You have to set your groups up first, give them a name, and then you can start playing music through that group. + Want to play different music in each room? Both Spotify and Amazon Music requires a family subscription to play different music on different devices. You can, however, have Spotify playing on one device (through Spotify connect) and Amazon Music playing on another. Amazon Music supports Apple Music, Deezer, and TuneIn, but these serves can't be played independently. One more option: You can use BLUETOOTH on the amps! So you can effectively play 3 songs on 3 different Echo's. Edit: you can play different music on different devices through Amazon music but I think you need Prime Membership to do this. +Want to play local files? Unfortunately, there is no support for playing local files on Amazon Echo devices because they are cloud-based. However... BLUETOOTH is again the savour. Just remember to rename all amp Bluetooth names to the correct room, so you can identify them easily. These amps have Bluetooth 4.2 built-in, Nobsound also sells the Bluetooth 5 version, which supposed to provide better range; however, I find these have adequate range to cover every room of my Dorma Bungalow (placed in unconverted loft space). So how do these amps perform? Well, I'm extremely impressed with them... that's why I bought 5!. Audio quality is much better than the old Sonos ZP120 which had a pitiful output of 50w per channel. These amps provide 100w per channel - more than enough to power my speakers to uncomfortable volumes. There are also BASS and Treble controls which work really well. I have the volume and bass set at 2 o'clock and the treble at 12 o'clock. I have one amp connected to a cheap 2-way speaker switch allowing me to link bedroom speakers and bathroom speakers without the need of another amp. For those wondering: My speakers consist of: 1 pair of Yamaha NC-IS800 8-inch ceiling speakers (Bedroom) 2 pairs of AmazonBasics 8-inch ceiling speakers (Kitchen and Bedroom) 1 Lithe Audio LASS65 6.5-Inch Stereo Dual Tweeter Ceiling Speaker (Bathroom) 1 pair of Adastra Slimline 6.5-inch ceiling speakers (Bedroom) 1 Adastra Stereo 6.5-inch Dual Tweeter Ceiling Speaker (Bathroom) You're probably thinking... a bit rubbish. I admit, the Adastra's are a bit pants (but mainly because I've not installed speaker hoods yet). The AmazonBasics are spectacular - everyone comments on how amazing they sound. The Lithe Audio speaker is great and the Yamaha's are easily the best. (I use another 4 Yamaha's in my 7.1 Dolby ATMOS system - they sound incredible). Other reviews have mentioned interference. One scenario that you will get interference is if you have a multitude of wireless devices near the amps inside your server cabinet. You'll know it's caused by wireless as you will hear a very low pulsing static sound coming through the speakers. To irradicate this, you need to ensure any wireless devices are placed outside of your cabinet. I did initially make this mistake by having a wireless router, Tenda mesh Wi-Fi and all echo's inside the cabinet. I've since disabled Wi-Fi on the router, placed the primary Tenda node and all echo devices outside of the cabinet and my speakers are now completely silent. I've seen others attaching echo inputs to the top these amps, I would not recommend this as you will likely get interference. Other interference can be caused by poor quality speaker wiring. I've installed premium-quality QED QX16/4 or QX16/2 speaker cable throughout my house. The other, often overlooked thing, is these use a hardware on/off toggle switch which means I've been able to add smart switches to schedule them to turn off and on. Overall, I love these amps! They're great value, provide plenty of output and most importantly, sound great!

I have this running some Bose Acoustimass speakers in a home made boombox, very clear sound and well controlled bass with crisp treble. A very small and compact unit but can get a little warm after a while, I did find that due to it's size the controls were very close to each other making it difficult at times. I was disappointed with the quality of the banana jack plugs as the threads were extremely poor and there is no way if you passed a cable through the hole that the knob will tighten (I was going to return it). I didn't use the thumb screw just plugged the jacks straight in so no problem. The bluetooth is solid locks on straightaway and is crystal clear however using the RCA analogue connection it was a lot quieter and no where near as clear audio, it sounded slightly muffled loosing the crispness at the top. It would have been nice to have a bluetooth on / off switch as if it is till connected it will not allow sound from the RCA's. I have also changed the supplied PSU as many people recommend for better sound, I'm not sure the quoted 100W x2 RMS is true but it is loud and sounds very nice. For this power and bluetooth APTX at this price it does give good value for money.

This is a review for the NS-15G Pro, which has aptx-HD support. I used the Bluetooth connection most of the time. My setup uses these amplifiers with Q Acoustics 3030i and with 14 AWG speaker wires terminated with banana plugs on both ends. + Decent amplifier for 4 - 6 Ohm passive speakers. It should be okay for 8 Ohm speakers as well. + I didn't feel the need for the higher grade power supply. The included one 19V, 4.74A was plenty for my living room. My volume is set at less than 50% on both the phone and this amplifier. + The Bluetooth supports aptX-HD which provides for good data rates and good sound output. In case you are looking for even higher data rates, note that it does *not* have LDAC support. + Buttons are very smooth in operation. + Tone button and Volume button make a nice click when they are turned on. The Volume button turns on the amplifier and also the Bluetooth connection if it was set at Bluetooth. + I didn't notice any hiss when music was not playing - even when turning the volume knob to the max. +/- Most of the time the Bluetooth works very well. I was able to connect to the amplifier from a different room and play without dropouts. It has happened only once in the past several weeks that there were dropouts even when the phone was positioned right next to the amplifier. - The Bluetooth can connect to only one device at a time. - Sound is a bit difficult to get right. See the attached video. - The default sound seems a bit muffled. When the tone control is turned on, the bass disappears and the treble goes away as well. Both needs to be turned up well past the mid point to get to a decent sound signature. - To my ears, it appears that the tone control enhances the treble and the bass control enhances the bass. The mids are left to fend for themselves. - The tone (treble) and bass buttons do not have a "zero" point. The labels are only (-) and (+). And the position at (-) really reduces the respective frequencies. Overall, in my opinion, it is a good starter amplifier that can be used in lieu of the "audiophile" grade amplifiers that have a ridiculous cost in hundreds of pounds, or even thousands of pounds. The market for speaker amplifiers from typical speaker brands is saturated with such insanely expensive models. In contrast, we can get a decent pair of active speakers with an inbuilt amplifier for less than 500 bucks. For the NS-15G Pro, just fiddle around with the bass and tone controls a bit. And perhaps use an equalizer at the source if you want a better sound signature.