Technical info

Voice Coil: CCAW (copper-clad aluminium wire):

CCAW is an electrical conductor composed of an inner aluminium core and outer copper cladding

OFC:

Oxygen-free copper. Don't get this mixed up with optical fiber cable

Oxygen-free copper (OFC) or Oxygen-free high thermal conductivity (OFHC)

dB (The decibel)

The decibel (1/10 of A Bel ie 1B = 10dB ) is used for a wide variety of measurements in science and engineering

Impedance:

is represented as a complex quantity "

$\scriptstyle Z$

" for which the SI unit is the ohm (Ω)

Impedance is defined as the ratio of these quantities.

$\ Z = \frac{V}{I}$

A neodymium magnet:

is a permanent magnet made from an alloy of neodymium, iron, and boron.

Frequency Response:

Standard range of audible frequencies by humans is typically 20 to 20,000 Hz