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In the Forum: Off Air Audio
In the Thread: Forward in the past with old radios.
Post Subject: Hm, the Schaub & Lorenz funny tweak.Posted by Romy the Cat on: 2/27/2011
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As I said I did not plan to modify my little sexy German radio in any way. No mater how pathetic it sounds I do like in my kitchen and I heavily use it – expertly as I expected. I however, did mean to change it cosmetically to replace the speaker’s cloth. I found a fabric that I like and replacement was very easy. It is darker color and it made my Schaub & Lorenz even better looking – love it!
The incredibly ironic thing is that to the grill’s fabric did change very positively the sound of the radio. It is not because the old Schaub fabric had 60 years old compressed dust but it has to do with the way how Schaub apply the fabric. This radio use in front 2 oval full-range drivers that are mounted on a wood board with oval holes. Above the holes, right under the fabric, on the box axis of each driver Schaub & Lorenz stretched a cross of 1.5” plastic-like material. I means that each driver had with a driver surface a non-transparent masking and this was in the very mid of the driver – where HF are coming out of the driver. The plastic-cross did form a skeleton that hold the fabric over the driver, preventing it from sagging. It also, subs a lot of HF transient response of the drivers and in the very middle of the driver they were covered with virtually brick walls.
Removing of the original grill fabric and the most important removing the under-fabric sound non-transparent plastic-like frame did yield a lot of more HF from the radio and made sound much more appreciative. I have no idea why Schaub & Lorenz did it. It looks like they had no ears to hear what they do.
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