Magna Audio
29-02-2020, 15:41
Here's a pair of Tannoy GRF style cabs I made for a customer in Belgium (years back).
They are back with me for a modification to the input (going, DSP bi-amp active, but with the passive capability retained), and a refinish, as they were left for a good long while during a holiday with the sun streaming in on them under a hot sun.
The passive / active set up
https://uploads.tapatalk-cdn.com/20200229/a174c671c4896a965643c20394e8f79b.jpg
I've been setting up the DSP system that will do the crossover and HF filter necessary to tame the Tannoy horn tweeter.
This route benefits from not using an L-Pad to lower the dB of the tweeter to that of the bass, and also the filter I mentioned is not a passive component one.
Another benefit is being able to run an amplifier most suitable for the tweeter (a EL84 SET amp has been chosen) and a Quad solid state amp for the bass.
Different damping factors can be used to optimum driver control / sound.
I will be setting up the sound side with further measurements and listening tests once the finish is restored.
Here the fade before treatment (actually looks worse in daylight).
https://uploads.tapatalk-cdn.com/20200229/8e73941b7fdca87ecd21e13472d8a68a.jpg
First remove the varnish..
https://uploads.tapatalk-cdn.com/20200229/aa9139315064da963dd2fbbd9d47d62f.jpg
Then treat with specialist wood bleach..
https://uploads.tapatalk-cdn.com/20200229/f85ec9a840dc207666d651de8ead57d9.jpg
https://uploads.tapatalk-cdn.com/20200229/4803dbe80350739bccde92b41472ee0d.jpg
Further treatment will be done as necessary, before neutralisation of the bleach and then staining and re-varnishing.
More to follow..
They are back with me for a modification to the input (going, DSP bi-amp active, but with the passive capability retained), and a refinish, as they were left for a good long while during a holiday with the sun streaming in on them under a hot sun.
The passive / active set up
https://uploads.tapatalk-cdn.com/20200229/a174c671c4896a965643c20394e8f79b.jpg
I've been setting up the DSP system that will do the crossover and HF filter necessary to tame the Tannoy horn tweeter.
This route benefits from not using an L-Pad to lower the dB of the tweeter to that of the bass, and also the filter I mentioned is not a passive component one.
Another benefit is being able to run an amplifier most suitable for the tweeter (a EL84 SET amp has been chosen) and a Quad solid state amp for the bass.
Different damping factors can be used to optimum driver control / sound.
I will be setting up the sound side with further measurements and listening tests once the finish is restored.
Here the fade before treatment (actually looks worse in daylight).
https://uploads.tapatalk-cdn.com/20200229/8e73941b7fdca87ecd21e13472d8a68a.jpg
First remove the varnish..
https://uploads.tapatalk-cdn.com/20200229/aa9139315064da963dd2fbbd9d47d62f.jpg
Then treat with specialist wood bleach..
https://uploads.tapatalk-cdn.com/20200229/f85ec9a840dc207666d651de8ead57d9.jpg
https://uploads.tapatalk-cdn.com/20200229/4803dbe80350739bccde92b41472ee0d.jpg
Further treatment will be done as necessary, before neutralisation of the bleach and then staining and re-varnishing.
More to follow..