JBL Project EVEREST DD66000 User Manual page 18

CHAPTER 6
Amplifier Recommendations
No single type of amplifier is specified for use with the Project EVEREST
DD66000 system. The speakers are highly efficient and will operate adequately
with an amplifier or receiver of 70-100 watts.
However, the transient response and audio definition of a high-end system such
as Project Everest DD66000 will pick up all inefficiencies and distortion in an
amplifier system. For full-range operation, the Project Everest DD66000
system should not be used with an amplifier/receiver of less than 100 watts.
Amplifiers/receivers of 100-500 watts will ensure optimum system
performance.
There is no effective limit to the power handling capabilities of the Project
EVEREST DD66000 loudspeakers when driven by consumer audio amplifiers.
No damage will occur when used with high powered components. Source
impedance is an important criterion in selecting an appropriate unit; the
selected amplifier(s) should have a very high current capacity and must be
capable of driving a low-impedance load.
For bi-wiring or bi-amplification applications, four identical amplifiers or two
dual-channel units may be used, although specialized low frequency and high
frequency amplifiers offer clear advantages. (If four amplifier channels are
used, the high frequency amplifier may be up to 6 dB less powerful than the
low frequency amplifier. Due to the power versus frequency distribution of the
music, the low frequency section requires approximately four times the power
of the high frequency section.).
Project EVEREST DD66000 specialist dealers can recommend amplification to
best suit individual needs. In all cases, the left and right amp lifiers for each
section must be identical. Make sure that the input sensitivity of the two
amplifiers is equal or that input level controls are provided to maintain the
proper low to mid/high balance. If two identical stereo amplifiers are chosen,
each amplifier may be located near a loudspeaker and drive low frequency and
high frequency sections through short wire runs.
The addition of a crossover network should be connected directly to the low
and high frequency amplifiers driving this system, and is required if the system
is to be biamplified.