Originally Posted by
Ian Mackenzie
M,
In an effort to bring you clarity of the application if your Altec 515 woofer l present to you the following information and guidelines:
. . .
Conclusion
The 515B is relatively miss matched for a sealed enclosure of bass reproduction is required at realistic levels without a subwoofer.
The 515B can be used with a Thiele Small maximally flat alignment if a limited output below 100 hertz is acceptable. A custom enclosure tuning can be utilised with a non flat alignment is acceptable. This enclosure however will only perform effectively with mid bass above 47 hertz. If desired a sub woofer could be used to fill the bottom two octave.
Note this driver has only a modest X max which will limit its maximum bass output. The benefit of this driver is its efficiency making it a suitable match to SET amplifiers.