The Woofer
The E8B’s woofer construction is that of a multi-layered sandwich, consisting of two layers of Kevlar with a layer of Rohacell in between. Rohacell is a polymethacrylimide (PMI) hard foam that is used as a core material for sandwich constructions. Rohacell is an extremely lightweight material that, in addition to providing additional stiffness for the woofer’s construction, functions as a damping material to eliminate unwanted resonances. The E8B copper pole cap and the aluminum shorting ring reduce motor induced distortions to an amazingly low level. The woofer’s multi-layered construction also reduces distortion for greater signal reproduction accuracy.
Rear Panel Controls
A) System Level Adjust
This control adjusts the sensitivity of the input signal.
Rotating the control
clockwise increas-
es sensitivity while
counterclockwise rotation decreases s e n s i t i v i t y . T h e
adjustment range is from -30 dB to +6 dB. The default setting is +6 dB, which should suffice for most applications. Normally, adjustments would only be made if you are using your monitors in a surround environment and you need to balance levels, or if your monitor sends are too hot and not adjustable. If an adjustment becomes necessary, it is recommended to use measuring equip- ment such as a tone or filtered noise generator and an SPL meter.
B) HF Shelf Switch
This switch provides the ability to adjust the high frequencies using a shelf EQ with the option to increase or decrease the level of the frequencies above the shelf threshold. Experimentation is key to the successful use of this system parameter. It is made available to facilitate modification to the loudspeaker’s sound quality if, for example, you find the sound to be too bright or lacking an “airy” quality. This is a 7-position switch with adjustments in .5dB steps and includes the following gain settings: +1.0, +0.5, 0, -0.5, -1.0, -1.5, -2.0. It is recommended to set this control to 0 and listen carefully before adjusting to your preferences.