Upgrade Kits For Vintage & New Speakers

Troels Gravesen is an independent Danish speaker designer and is not directly affiliated with Jantzen Audio Denmark.
Presented on the Jantzen Audio website, are the speaker kit designs, where Troels has chosen to use Jantzen Audio components for the crossover.
All rights for the designs are the property of Troels Gravesen.

For further information please visit the official Troels Gravesen Website: Click here

Please note!  All kits where Jantzen Audio offers drivers, can be purchased with or without drivers.



B&W 802 S3 Upgrade Kit

Replacing the original crossover components with modern components


Chario Sonnet

Replacing the original crossover components with better components


Dali 800 Renovation

New crossover design with modern components


JBL L100 Century

New crossover design with modern components

Made for these drivers only:
123A bass units, LE5-2 Midrange drivers, LE20, LE25 or LE26 tweeters.


JBL L112 Century

Replacing the original crossover components with modern component

Made for these drivers only:
128H bass units, LE5-12 Midrange drivers & JBL 044 tweeters


JBL L26 – 2-way

New crossover design with modern components


JBL L26 – 3-way

New crossover design with modern components


Tannoy MG15

New crossover design with modern components


Yamaha NS1000M

New crossover design with modern components