Pianino cyfrowe Alesis Prestige Artist vs pianino cyfrowe Yamaha P-125 B - blind test 

If it was recorded through an audio jack then this is probably true, which seems to be the case but the Yamaha has weaker speakers compared to the Alesis (7wx2 vs 50w). not sure why the recordings were different in terms of decibels, if it was intentional

@@NamePend Notice the Alesis has orange RCA cables connected, which means they are recording it through the audio jack. Also notice that the Yamaha has the "Rec" button on (red light) when playing. This means it is not a live recording through the speakers (audio is later played back and possibly recorded in a USB flash drive, or the orange cables you see in the Alesis are then used off camera). In addition, the sound itself when listened through studio headphones is too clean to be from speakers. Regarding Yamaha having weaker speakers than Alesis: it is not the case. I have tested both in person and Yamaha is still stronger, and this is why: 1) The Alesis has four 6 cm active woofers (2.5"). The surface area to move air is: 4 x 28 cm² = 112 cm². The Yamaha has two 12 cm woofers. The surface area is: 2 x 113 cm² = 226 cm². This means the Yamaha P125 has twice the surface area to move air, resulting in more presence in the sound. 2) There is a difference between amplifier power rating and power consumption. If you actually measure the power consumption of these amplifiers, which I have done in some tests with piano music and music in general, you will see that amplifiers typically consume 1-2 watts of power for reasonable listening levels. If you find this very difficult to believe, I suggest you watch here on RU-vid the video titled "How loud is 1 watt?" Roland, for example, states both numbers (amplifier power rating and power consumption) on the spec sheets in their website, and most of their digital pianos consume just a few watts in real life. Don't expect the Alesis to be pumping 25 watts per channel if you turn the volume all the way up. All that number means is the potential maximum power output under some extreme conditions. Playing piano is not going to trigger that much power output. 3) Even if both amplifiers were pumping 7 watts vs 25 watts per channel, with identical speaker sensitivity (not the case due to Yamaha speakers being more sensitive, which I will explain below), decibel ratings have a logarithmic scale, which means that you only get 3 dB after doubling the power in this case. In addition, doubling the speakers only gives you 3 dB increase. Typically, 2.5 woofers have about 86 dB sensitivity. If that is the case in the Alesis, you get the following: 86 + 3= 89, 89 + 3 = 91 dB sensitivity (calculating the dB sensitivity of all 4 speakers). Then the amplifier would produce: 91 dB at 1 watt, 94 dB at 2 watts, 97 dB at 4 watts, 100 dB at 8 watts, 103 dB at 16 watts, 105 dB at 25 watts. Note: the Alesis might have much lower sensitivity than 86 dB. I believe they use flat membrane speakers (not sure), which may have really low sensitivity. I have seen them at 82 dB or even less, which means that all that power, if used, is going to be wasted in trying to match the speaker sensitivity of the Yamaha speakers. The Yamaha is likely to have 90 dB speaker sensitivity for being larger speakers made of paper. Since there are two speakers, that would be 93 dB sensitivity. The amplifiers would produce: 93 dB at 1 watt, 96 dB at 2 watts, 99 dB at 4 watts, 102 dB at 7 watts. This means the Alesis would be about 3 dB louder than Yamaha (in an optimistic case scenario), which is insignificant in practical terms, as 3 dB is barely noticeable. On top of that, the fact that Yamaha has twice the surface area in the speakers means more presence at the same volume. 4) Speaker sensitivity: small woofers are typically less sensitive than larger woofers. That means they require more power to produce the same sound than larger woofers. 5) Speaker Maximum SPL (Sound Pressure level): Small woofers are also limited in the amount of volume they can produce. This is why professional audio always start with 8" speakers or more. No matter how much power you give to a small speaker, its SPL will be limited by its size. Plus, you could burn the voice coil with too much power. I wrote this rather long message trying to show that it is not a good idea to judge sound by amplifiers alone. In practice, things don't work that way. Of course, manufacturers want people to believe that amplifier power is very important. It is not, especially for digital pianos. Not only it is not important, it is misleading.

​@@Instrumental-Covers NEEEEEERRRRRRDDDD!! really tho ty for this useful and informative message.

Speaking facts

The Alesia has bigger speakers with passive radiators and tweeters as well, that is why. They both do not have the exact same speakers to be able to sound the exact same in Decibels 😅

@@wiyseful8859 this may be true but they aren't recording from the speakers. They are recording from the line outputs therefore they could have made the volume equal. The speakers didn't matter at all in this video comparison.

@smc1377 ¿Cómo puedes saber que se ha incrementado voluntariamente los decibelios digital mente, en aplicaciones de vídeo? Es una duda y quiero aprender. Apreciaría tu respuesta.

@@anthonyjavierramosmaldonad977 I don't think it was intentional that the Yamaha was quieter than the Alesis. I just think that they didn't take the necessary steps to ensure that the volume or the gain was equal between the two pianos. I'm not accusing them of manipulating the volume, just that they didn't take the time to ensure this was an equal comparison. In any video editing platform, you can see the decibels right in your timeline. I just ganked this video and put it in my video editor and can confirm that last song was noticeably much louder with the Alesis. The song peaked at -8.2 decibels whereas the Yamaha peaked at -14.2, but most of the song was about 8 decibels difference. That's a huge difference in terms of volume.

@@smc1377 ¡Muchas gracias!

no you aren't, it's one of the best digital pianos out there, I also own a Prestige Artist btw

How does the sound quality compare to a Yamaha Dgx 670? I want to know which should I buy

​@@TSwizzle1989.How is it? Why are they out of stock on Amazon for over a year now? Are they discontinued? People say that they sound out of tune, is that true? Are the keys slippery?

Played both and without a blindfold. Alesis has caught up with Yamaha. It is true that the Yamaha has a very slight edge on tone quality. That said, however, the Artist has a much better UI as compared to the P 125 as well. The slight advantage of the P 125 was not a deal breaker for me. The Artist has weighted and graded hammer keys as well. I Like both but I'll be playing the Artist. Thank you for your honest input.