at the end i still choose goliathus over qckmass , goliathus coloring more matching to my taipan 
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not bad , able to tell my laptop , lol . gues is a bargain model , everyone able to tell .

here is some of my razer collection   

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Hi, Anyone experiences Razer Death Adder 6400 dpi ?

The new DA using 4G Optical Sensor meanwhile previous vers Razer DA usingg 3.5G infrared sensor..Both are sensor more or less the same ?

http://www.razerzone.com/gaming-audio/razer-hammerhead-pro/



The Razer Hammerhead Pro In-Ear Headset is an in-ear monitor (IEM) engineered from the ground up to set the standard in portable gaming audio. Machined out of aircraft grade aluminum, the Razer Hammerhead Pro embodies ultimate durability packaged in a lightweight, comfortable form factor.

Encased within each sleek, brushed shell is a high performance, precision-tuned 9mm neodymium driver. Paired with an optimized inner acoustics chamber in each shell, these in-ear monitors produce a sound signature that packs a strong bass while maintaining crystal clear mids and highs.

Supreme quality sound would be wasted if drowned out by stray, ambient noises. That is why the Razer Hammerhead Pro comes equipped with interchangeable ear-tips in 3 sizes, along with an optional pair of bi-flanges to provide superior sound isolation and bass response.

This exceptional audio solution also features an in-line omnidirectional microphone with one-touch phonecall control for crystal-clear, convenient voice communication with mobile devices on the go.

Topped off with a compact carrying case for portability, the Razer Hammerhead Pro epitomizes the way in-ear monitors should be experienced – with style, comfort and aural fidelity.

Thank you for the info bro. 
I'm still using the legendary MX518 logitech since 8 yrs ago..Thinking to try DA

Byk kuat poison   
Btw, any seller in garage sales selling cheap ?