Sansui AU-999 Modifications

We perform the “Kevzep” (Audiokarma.org) Line Input and Bass EQ Modification

Modification Details

This mod focuses on refining the line inputs and enhancing the bass EQ circuit!

Line Input Upgrade
The modification improves the signal path for the line inputs, leading to a cleaner, more accurate sound reproduction. This is especially noticeable when using high-quality sources.

Bass EQ Enhancement
The bass EQ circuit is redesigned to provide more precise control over low frequencies. It tightens up the bass response, making it punchier and more defined without being overpowering.
The Results

Sound Quality
The clarity and detail in the midrange and highs are noticeably better. The bass is much more controlled and has a satisfying punch that was lacking before.

Versatility
With the improved Bass EQ, you can fine-tune the low end to match different music styles and recordings. Whether you’re listening to jazz, rock, or electronic music, the amp now adapts beautifully.

Overall Listening Experience
The mod has breathed new life into the vintage setup. Music sounds more alive, with better separation and dynamics. It’s like the system has been turbocharged!

Final Thoughts
If you’re thinking about getting more out of your vintage gear, we highly recommend Kevzep’s line input and bass EQ modification. It’s a fantastic way to enhance the performance of your setup, especially if you’re looking for tighter bass and cleaner inputs.