Sound Quality

The Thermaltake Isurus Pro V2 in-ear headphones are equipped with a pair of 13-millimeter dynamic drivers. Their specified frequency range spans from 20 to 40,000 Hz, which sounds very optimistic, but was still more than enough to secure them the "Hi-Res Audio" badge.

The sound performance of these headphones is EXTREMELY dependent on the kind of fit you achieve. This is of course the case with any in-ear headphones, but rarely does pushing them a millimeter deeper into the ear canal or angling them in a slightly different way have such an impact on the sound. Depending on this parameter, the sound quality can go from completely thin and hollow to pleasantly punchy and fairly lively in a matter of seconds. With that in mind, it is essential to try out all three supplied pairs of silicone ear tips to find those that fit your ears best.

Alternatively, you can consider investing in a higher quality pair of ear tips than those provided by Thermaltake. After I swapped them out for a different pair I had laying around from the excellent 1MORE Dual Driver ANC Pro wireless headphones), the Isurus Pro V2 in-ears became drastically less fussy about (micro)positioning. The speaker tubes are round, so pretty much any aftermarket set of ear tips should fit with no issues. You're looking for a pair that completely seals your ear canals without causing discomfort.

The closest I got to that by using the supplied ear tips was with the preinstalled ones. By using those, the Thermaltake Isurus Pro V2 in-ear headphones delivered solid sound quality in line with what could be expected from a pair of $40 in-ear headphones. They're quite mid-focused, meaning their mid-range is noticeably pronounced. They deliver clean and distinct vocals, as well as plenty of information about your surroundings in a 3D gaming environment. You'll hear almost everything in your vicinity, although it can be a bit challenging to pinpoint the exact direction of a sound source because of the way the Isurus Pro V2 handles high frequencies. The high-range is slightly subdued, so you're not only losing the finer details, but don't get much in terms of airiness and overall snappiness, either. When I connected the headset to the Creative Sound Blaster X3 external USB sound card and boosted the 4,000–16,000 Hz range by around +5 dB, the Isurus Pro V2 instantly responded with an even more informative, significantly more lively performance. The bass is pleasantly deep and does a good job of adding warmth to the overall sound signature. It doesn't have a lot of texture or bite, but is not sluggish either.


When connecting the Isurus Pro V2 to my smartphone (OnePlus 7 Pro) by using the Sharkoon Mobile DAC, as well as the Creative Sound Blaster X3 external USB sound card, a certain amount of background hiss was audible with nothing playing. The hiss was inaudible on my integrated sound card (ASUS SupremeFX S1220).

Although it's by no means perfect, the overall sound quality of the Thermaltake Isurus V2 Pro is fine for $40.