Alpha & Delta KS100 Bluetooth 5.2 Hybrid Driver 120 hour IPX6 TWS

Alpha& Delta are a Singapore company that along with this TWS set also make IEMs. They have provided one set of each design to Audio Reviews Downunder for honest appraisal and review.
Alpha& Delta will ship to virtually every country in the world.
The TWS are supplied with a range of tip sizes and a USB C charging cable.

The case is made of metal and has a strong hinge. There are four lights indicating the charge status of the case and the ear buds also have an internal light which operates to show you it is charging and goes out when fully charged.
The case takes 3 hrs to charge from flat and the buds take one hour from flat. The earphone provides 6 hours of usage and the case 120 hours.
The resin shell is molded and shaped much like the Kinera IEMs and fits snug and very secure in my ear. You can see in the hybrid earbud, which is transparent, the position of the driver and the BA are just behind the nozzle and fire directly into it with no directional tubes fitted. The engineers have used the shape of the cavity to tune the drivers.


The sound. I have two variants you can see in the photos. The Blue one is the single dynamic driver, a V shaped sound signature designed for strong bass performance. The White faced TWS is the hybrid with a single DD and a BA for a more balanced sound signature. ( You can order any face plate colour for either and there is also black and pink options)

Firstly the single DD variant. Described as V shaped by A&D but the sound comes across as well balanced with clear vocals but great subbass. Bass is not over emphasized but more like a gentle V shape. Bass impact is good and miles ahead of my old Audiofly TWS set which sounds muddy and muted in compassion. The sound is detailed, airy and very natural. The upper mids and treble are boosted compared to the Hybrid.

The DD/BA hybrid earphones with the white faceplate are a different proposition. They eased up on the bass and the treble and details are more prominent, but smooth and easy to listen too. The soundstage is also nice and wide, the vocals are placed just right and have plenty of air around them. I grabbed a set of Letshuoer Galileo X Gizaudio which has the same driver configuration to use as a benchmark.Honestly they are lineball. Both smooth ,detailed, easy to listen to with great fidelity. And it is a wireless I am comparing to a wired earphone. Quite amazing.


I must stress the following. You have to find a tip that gives a good solid seal to get the full audio range. A&D supply a mix of sizes including foams. The tips the earphones came fitted with fitted did not give me a good seal but playing around with a bunch of tips I found a set that gave me a great seal and the earphones came fully to life. I used a narrow bore with a slightly taller core which meant removing them when casing the earphones or the auto shut off did not activate.



Summing up: For sound quality, design and build, battery life and excellent bluetooth performance getting this set is a no brainer.
Not mention value :The Dynamic single driver ( Blue ) is $85 USD . The hybrid DD plus BA is $100 USD .
That's crazy good value when you consider the price of top of the line Apple, Samsung and some other premium TWS that are north of $250USD.


Website if you are considering purchase. https://www.alphandelta.com/products/ks100-true-wireless-earphones?variant=43746720579778