Hidizs S9 PRO Balanced & Single-Ended Mini HiFi DAC & AMP, 768kHz/32Bit, DSD512 Portable Audio Decoding Amplifier for iPhone iPod Android PC with Windows/Mac OS/iOS/iPad OS System (Black)

Product Information

As briefly alluded to earlier, punchier mid-bass bumps and energetic treble peaks are slightly enhanced for an excitable juxtaposition between both elements in the FR. Increase the maximum volume setting in the audio settings to prevent the user from making the volume too loud due to mis-operate in the volume mediation interface.

Connectivity​It should be noted tha Red light: Linear phase fast roll-off: Enhanced analytical capabilities, offering a clean and crisp sound. Like the original S8, the S9 Pro is compatible with all smart devices. As discussed, the removal of the independent volume controls is a step in the wrong direction. In the upper range, Hidizs has a behaviour that combines control, resolution and sparkle. Tempotec is quieter, with a slightly lower energy, but not as clean. The Hidizs is perceived as more loose and in noisier environments seems to reflect a more controlled, polished and resolute character, generating a more musical and less intricate response than the Tempotec.As can be seen in the specifications, Martha's power is 138mW on SE and 180mW on BAL at 32Ω. In reality it is 150mW for both outputs, a little higher for SE, but a little lower for BAL. I have verified that it can give 2.76V per BAL at 33Ω with a pure tone of 5kHz, but I have not been able to make such a measurement with lower frequencies, simply, it is not able to give that power in all the frequency range. In that special case, the power would be 230mW, a very high value. And that means that Martha is capable of a lot. Moreover, the S9 PRO Copper Limited Edition boasts some impressive measurements under the hood (Total harmonic distortion), at 0.0006%@32ohms in the 3.5mm out, and 0.0012%@32ohms. I am actually a happy user of the Apple Dongle, it has proven to be of very good quality for its price (which is why I have ended up with multiple units) but there are a few situations in which the tiny device just can’t cut it. This is mainly with over ear headphones, which I rarely use away from my desktop devices anyway, but there are also some IEMs that benefit from having a little more power, especially if we consider the fact that the EU version of the Apple Dongle is only half as powerful as the US version. With Martha by your side, you're not limited by platforms or devices. It features a standard Type-C data interface, ensuring excellent compatibility across a wide range of operating systems, including Windows, Mac OS, iPad OS, Android, iOS, and Harmony OS. This means you can plug and play on virtually any platform without a hitch. Whether you're using a computer, tablet, iPhone, Android device, or anything in between, Martha ensures a seamless audio experience.

Optimize the pure tone mode, disable WiFi and Bluetooth in the pure tone mode, and clear the recently task list. As I said, this price I find reasonable as the S9 Pro is still around 80€ here at the time of putting this review together. Because of the S9 PRO Copper Limited Edition’s stringent focus on the sharper or distinct elements in the FR, the timbre can come across as wonky or unnatural when paired with transducers tuned towards a flat or neutral response. The rendition of the sound is same like its midrange, it demands attention and very lively, “here, listen to this cymbal, crashes and hi hat !”This review is based on a review sample provided by Hidizs (Thank you!) I have no financial interest in Hidizs or the success of this product.

As can be seen in the graph, Martha has a flat response from 5Hz to 40kHz over the entire volume range. There is also no difference between channels, as both signals overlap. It is a Hi-Res device. Weighing only at 17g, it is very lightweight, but feels premium at the same time thanks to its glass and aluminum construction. Treble has an almost spotless, lucidity, shimmer and crisp quality that defines its detail quality and tones of harmonics. The Dawn Pro sounds a little bit like the S9 Pro Plus Martha, but more digital and thin sounding regardless of what filters you used.

Average IEM and earphones

Certainly that it has an excellent linearity and almost flawless midrange quality with an exuberant, transparent and pristine within its character. Both male and female vocals exhibit an organic and life-like presentation. Male vocals are firm, broader and deep in all categories of vocal types. Female vocals sound very pleasant as it has this euphonic, mesmerising and soothing feel in contralto to mezzo-soprano voice while sopranos have this silky, shining with expansive spatial range and yet melodic.