These EMP EF30 Bookshelf Speakers have the identical performance of their RBH Sound TK-5C counterparts, but at a much lower price.  The only differences are cosmetic - the RBH Sound versions have a piano black top and fiberglass cone mid woofers as opposed to the poly graphite ones found on the EMP models.

Specifications

Woofer:
5.25� (133 mm ) Poly Graphite

Tweeter:
1� (25 mm) Fabric Dome

Recommended Power:
100 Watts

Impedance:
8 Ohms

Frequency Response:
63 Hz - 20 kHz

Sensitivity:
86 dB

Dimensions:
7.25� W x 12.75� H x 8.5� D
184 mm W x 323 mm H x 215 mm D

Weight:
10 lbs (4.5 kgs)

The type of enclosure housing the drivers. This describes the fundamental nature of how sound output and tuning are derived.

Not black and white

The nominal or normal impedance for the speaker at most frequencies

An additional magnet is provided internally which reduces the magnetic effects when in proximity to an old CRT-based display. This is a non-issue with flat panel displays or LCD/DLP rear projection sets.

Mid or mid-bass frequency driver size in inches

Mid or mid-bass driver type or material

Typically foam or rubber, the material that surrounds the cone. Rubber and similar materials will last longer and are more forgiving to environmental conditions.

Midrange driver size (typically given in inches)

The material which makes up the composition of the midrange driver

High frequency tweeter size in inches

Typically aluminum or silk dome, this describes the material used in the construction of the tweeter

Discrete connections for high and low drivers allowing them to be driven separately using two amplifier channels per speaker

The range of low to high frequency material that can be reproduced by this system

Maximum power (in watts) the system can either output or support

How loud the speaker would be at 1 meter if fed a 1kHz signal at 1 watt (2.83 volts)

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