Quantum Science Audio (QSA) Yellow Level 20 mm fuse . 1A, 2A, 3A,4A,5A,8A

Quantum Science Audio (QSA), pioneers in the audiophile fuse industry with over 22 years of expertise in combating 'Bottle Neck Distortion'. QSA's fuses, once overlooked, now play a crucial role in enhancing audio system performance. They effectively tackle 'bottlenecking' issues, significantly improving system output. Our evaluations, supported by external feedback, affirm that QSA fuses remarkably upgrade audio systems across their range. The YELLOW fuse, with advanced material treatments, offers refined audio performance, delivering clearer, detailed sound for systems balancing quality and value.

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The Sound

General Impressions
Everything sounds more beautiful
There is more emotion in the music

Specific Impressions
Much lower noise floor
More micro-detail is revealed
There is less glare (I didn't even know I had glare!)
Individual voices and instruments are more apparent
They don't blur together when massed together
I think it is called individuation
The soundstage is deeper, wider and higher
The sounds are more solid in the soundstage
There are no gaps in the soundstage
Everything sounds natural
Frequency Response is linear at all volumes
Understanding lyrics is much easier
Bass goes deeper than before
Bass is better defined and easier to follow


The music just "pulls you in." You don't want to stop listening - very addictive.

These changes have been The single best tweak I have ever made! And I have been tweaking my stereo for 40 years.