Reviews by Iamvtlik

Iamvtlik

New Head-Fier
S9 Pro Plus Martha, an underrated dongle
Pros: Low noise floor
Lightweight, small form factor
Solid Build Quality
Low power consumption
Has 4.4mm balanced output
Cons: Quite short Type-C cable in the inclusions
No app support
No gain switch
No independent volume control
Gets a bit warm on long usage
Type C Cable only works on a certain orientation
Inclusions in the box:
Dongle itself
Type C to C Cable
Type C to A Adapter
2 Hi-Res Stickers
Hidizs Warranty Card

The Martha does not have the typical ESS implementation. Instead of being neutral-bright or a bright piece, this is more of a warm-neutral dongle with a slight boost in subbass, slightly forward vocals and smooth treble. The bass has a prominent presentation. There is a subtle subbass improvement with the "rumbling" being slightly more identifiable. It is fast and punchy, but without being too dark. Additionally, it has a well-laid robust and organic bass response. It is a solid choice for those wishing for that deep, rumbly male vocal(for example, that of Geoff Castelluci).

The mids have a more forward presentation. It is nicely detailed with a thicker and more refined texture. It has that "lush" sort of presentation for vocals, giving the notes therein a heavier yet still vibrant presentation. Lastly, there is clarity without being aggressive.

The treble region is resolving as well, with a slightly smoother presentation. It is not harsh. There is a "smooth extension" in just the right amount(at least in my standards). It is well-defined, has great control, and has a good amount of "air". Futhermore, it has a controlled presentation giving the user a sense of listening to a clean, crisp and transparent sound.

Comparisons:
VS DC03 Pro: Martha has better bass presentation and more forward mids. It also has a warmer tonality overall, while the DC03 Pro has a more airy treble presentation with it being identifiably brighter than the Martha.

Additional Notes:

In my opinion, this dongle is for those who want a warm-neutral and lush presentation, wishing for a slightly tamer treble(yep, imo not for trebleheads) without loosing details.

Just a note that contrary to the specs on "paper" where it doesn't have that much output power, I have fair reason to believe that the 138mW for SE and 180mW for Balanced is a very conservative approximation of how much power it can dish out. Thank you for spending time reading my review of the S9 Pro Plus Martha, have a good day.

Used: Poco M3 Pro 5G with the S9 Pro Plus Martha
Music App used: UAPP and HiBy Music Player(no equalizer used for both)

Songs/Tracks heavily used(in alphabetical order):
214-Rivermaya(16bit/44.1kHz)
A Homesick Song from the Frontier-Zhang Yongyan(24bit/96kHz)
Again & Again-Plastic Memories(24bit/48kHz)
Akatsuki no Requiem-Linked Horizon(16bit/44.1kHz)
Akuma no Ko-Ai Higuchi(16bt/44.1kHz)
Beat It-Michael Jackson(24bit/96kHz)
Black Sand-Tiny Island(DSD 1bit/2.8MHz)
Blurred Lines-Robin Thicke(16bit/44.1kHz)
Caesura of Despair-Irys(24bit/48kHz)
Deniere Danse-Indila(16bit/44.1kHz)
Down with the Sickness-Disturbed(24bit/96kHz)
Hall of Fame-The Script(24bit/44.1kHz)
Hero's Come Back-nobodyknows+(16bit/44.1kHz)
I Love You Too Much-Diego Luna(16bit/44.1kHz)
In da Club-50 Cent(16bit/44.1kHz)
King-Lauren Aquilina(16bit/44.1kHz)
King Chu dons His Armor-Zhang Hong Yan(24bit/96kHz)
Limbo-Freddie Dredd(16bit/44.1kHz)
Rainbow-South Border(16bit/44.1kHz)
Raining in Manila-Lola Amour(24bit/96kHz)

Additional Tracks:
A Fool for You – Carmen Gomes(DSD 1bit/11.2MHz)
Ashokan Farewell – John R. Burr & Mads Tolling(DSD 1bit/11.2MHz)
Carmen: Suite-Intermezzo – Musicus Orchestra(24bt/192kHz)
Dash-Naomi Shirai(DSD 1bit/11.2MHz)'
Entr'acte-Mai Fukui(DSD 1bit/11.2MHz)
Falling Snowflakes Dotting the Verdant Trees(24bit/176.4kHz)
Meu Amor me du um Lenco(24bit/96kHz)
Ploca Plantor – Out of Time and Country(24bit/176.4kHz)
Prune Flowers(24bit/176.4kHz)
Short People – Newman(DSD 1bit/5.6MHz)
Trace of Grace – Michel Gochard, Swallow, Murgia, Paccoud, Helstoffer(DSD 1bit/11.2MHz)

For those curious, here is the non-afiliated link:
https://www.hidizs.net/products/hidizs-s9-pro-plus-martha-hifi-balanced-dongle-dac
The dongle is currently priced at $89(US) or roughly ₱5000.

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