1.Fiio JA11

The JA11 is a very affordable dongle with price-to-performance ratio shooting through the roof. Retailing at $14.99 USD, it can also be
gotten on sales for around 9 bucks, which is cheaper than an average restaurant meal!
The JA11 is very light and compact, yet robust in build. It has a stock neutral bright tuning with good technical chops that belies its
sub-$20 pricing. There are many well-implemented features to talk about, such as no loud "pop" on removal of gear, no hiss/EMI, and
a low output impedance which promises a suitable pairing for fussy IEMs. Additionally, it does not get warm during usage.
original link:Fiio JA11 (head-fi.org)
2.FiiO JA11 Review: PEQ on Budget

So all in all, the JA11, with its solid build, customizable EQ options, and affordability, is an excellent choice for budget-conscious users seeking improved audio performance from their headphones or IEMs via USB-C.
original link:FiiO JA11 Review: PEQ on Budget(mobileaudiophile.com)
3.FiiO JA11 (Jade Audio ) Review

Prior to making quick assumptions, it is crucial to comprehend the extent of its usage. The FiiO JA11 serves as an affordable USB DAC cable designed to enhance the audio quality of a standard 3.5mm jack (or add one if it is not present) and power sensitive earphones for casual daily listening while on the move. It is not a full-sized USB DAC dongle, so one should not anticipate exceptional sound performance and power output. It would be unjust to compare it to products like the FiiO KA17 or expect it to power the Sennheiser HD650.
original link:FiiO JA11 (Jade Audio ) Review(ichos-reviews.com)
4.Fiio JA11 Review

Daily driving the JA11 for almost an entire week when i’m out and about, i have to say i have very good experience in terms of sound quality, also the efficiency in terms of power draw, which is a plus point considering i’m using an iPhone 15, not to mention it also supports PEQ if you need it, so it's definitely packing some features at a very attractive price point. If you are looking for a daily banger, and also something that you can use while you need to have a meeting and use it with cables that come with an inline microphone, the JA11 is the one to get.
original link:Fiio JA11 Review(head-fi.org)
5.Fiio JA11 Review

Let’s sum up: for less than $15, the FiiO JA11 feels like a solid improvement over your basic dongle. It’s not groundbreaking, nor it is as good as solution like the KA13, but for the price, it remains an improvement on every aspect, compared to default options like the infamous Apple’s Dongle.
Build quality is fantastic, it’s powerful enough to drive most IEMs, sound signature is clean with your typical FiiO’s low-mid magic, and you get some features usually lacking on higher-priced DAC/Amp like a true EQ, microphone support and the option to switch between UAC 2.0 or UAC 1.0, for maximum compatibility.
original link:Fiio JA11 Review(headfonia.com)