Filter Network; Rear And Front Panel Overview - REVELL Ultima Gem Owner's Manual

FILTER NETWORK

The Gem2 Loudspeakers utilize high-order networks which
optimize both the on-axis and off-axis response. These
sophisticated networks help to ensure smooth octave-to-octave
balance and timbral accuracy. Separate woofer, midrange and
tweeter filter boards prevent mutual interference between filter
network components, dramatically reducing distortion over a
wide dynamic range. Gold-plated binding posts and shorting
straps accommodate single-wired, bi-wired, and bi-amplified
connections. Low Frequency Compensation and Tweeter Level
switches provide the ability to compensate for acoustic effects
due to various applications and loudspeaker placement, as well
as less-than-ideal listening room acoustics.

REAR AND FRONT PANEL OVERVIEW

Controls are provided on the front and rear panel of the Gem2
which allow the optimization of the Gem2 Loudspeaker response
for different loudspeaker applications and placement. Refer to
the "Loudspeaker Placement" section for more information. The
definitions below refer to Figure 4, front and rear panels on the
following page.
1. Low Frequency Compensation Switch (Front)
• Select the Normal setting for most stand mounted
situations if the loudspeaker is located at least 3 feet
(0.91m) from walls and other large objects.
• Select the Contour setting if mid-bass thickness is
encountered in a stand-mounted application. This
setting provides compensation for "boomy" or
"ill-defined" bass that can result from particularly severe
standing waves.
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• Select the Boundary setting in situations where the
loudspeaker is mounted on, or very close to a wall.
2. Tweeter Level (dB) Switch (Front)
The tweeter output level can be adjusted in calibrated steps
by -0.5, -1.0, 0, +0.5, or +1.0 dB.
Note
Refer to the "Optimizing Performance" section for more information
about the Low Frequency Compensation and Tweeter Level switches.
3. Listener Axis (Back Panel)
Use the "On-Axis" setting for stand mounted and equivalent
heights on walls. Use the "Off-Axis" setting for units
mounted on a wall above the listener's ear height in order to
tilt the sweet spot down to the seated listeners.
4. Input Terminals
Provides high-and low-frequency connections from the
associated power amplifier(s). One pair of high-frequency
and one pair of low-frequency gold-plated binding posts are
available. The input terminals can be configured for
single-wired, bi-wired, or bi-amplified connections. Refer to
the "Making Connections" section for additional
information.
5. Jumper Straps
Accommodates single-wired, bi-wired, and bi-amplified
connections. Two gold-plated jumper straps are installed for
single-wired connections. The jumper straps must be
removed when the input terminals are used for bi-wired or
bi-amplified connections. Refer to the "Making Connections"
section for additional information.
Ultima Gem2
Owner's Manual