Qln Signature can be upgraded to up to date design by keeping some parts and changing parts that can be improved. The reason is that I over the years have had many questions “is it possible to improve this Classic speaker”.
There was a test and review of the Signature upgrade in the Swedish HiFi-Musik magazine September 2013 issue, 24 years after the original speaker was born!
The first version of the Qln Signature was an upgraded version of Qln One and was produced from 1986-1989. It had the same cabinet as Qln One but had rounded edges on the front and the front was covered with a black wool felt.
The Classic Signature hereby mentioned, was designed 1989 and was in production through 2003. The basic design with a truncated pyramid designed cabinet with Qboard and 7″ Kevlar woofer (yellow cone) from Scan-Speak and 1″ soft dome tweeter from SEAS. There were only small changes over time.
All Signature models with the yellow Kevlar cone) can be upgraded, but the best version to upgrade is the one with inverted dust cap that is the latest version (version4). Look under Signature models. With the upgrade you get tighter bass, a more refined and dynamic sound. But still with the same unique sound that Qln Signature is known for.
What we do with the upgrade
The extra ordinary cabinet and woofer are kept. The tweeter is changed to a more refined model with better dynamics, lower distortion and wider frequency response at both ends. The crossover uses the same unique constant impedance crossover solution but with higher grade of component quality and lower losses. For internal wiring we use Transparent cables. New aluminum terminal plate with WBT connectors. Rebuilt internal damping.
You can listen to upgraded Qln Signatures at Hifi Consult in Göteborg/Sävedalen +46 31 121500 or +46 31 121570. There are also orginal Qln Signatures to compare with.