The Nightingale
By Lars Mytting
02 Nov 1996
Cabinets
The cabinets are built by a friend of mine, Gunnar Granberg, a very skilled and experienced speaker builder. He made a marvellous system for me with a Dynaudio D260, a Seas W17EX001 (glass fibre cone) and two Seas CA 25FEY 10" in isobaric coupling. This made a system with smashing performance. However, as these potentially better drivers fit perfectly in the existing cabinets, I decided to try the upgrade Fig. 6. The Nighingale.
The net volume of the bass cabinets are 55 litres. By closing the existing port, I ended with a system Q of around 0.7. This works well and is easy to predict. For maximum benefit of the extraordinarily low Fs, a bass-reflex cabinet is best suited. A good match for the 8565-1 is a bass reflex cabinet of 103 litres with a port of 8x22 cm.
For the 6.5", Gunnar had discovered that the condition for this driver was to use aperiodic damping, simply by stuffing the damping progressively tighter towards a hole in the rear of the cabinet. If you want to use a bass reflex box for the Excel, a size of 8 litres with a port of 5x27 cm will be suitable. The T/S values of this driver is not too cooperative for achieving low bass response, so this combination gives a -3dB of only 61 Hz. If you want better bass response, Excel drivers with smaller magnets and other T/S values are available.
|
Top
