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tiPs
sPEAkER cONNEctiON:
To use the binding-post speaker terminals with bare wire,
unscrew the collar until the hole through the center post is visible
under the collar. Insert the bare end of the wire through the hole
in the post, then screw the collar back down until the connection
is tight. The holes in the center of the collars are intended for
banana-type connectors.
sPEAkER LEvEL cONNEctiON:
Use this installation method where the receiver/processor does
not have a subwoofer output or a volume controlled preamp
line-level output. Connect you receiver or amplifier’s front left
and right speaker terminals to the left and right terminals on the
255R that are marked “High Level In” (see item 8 Rear Panel
Detail). Connect the left and right terminals on the 255R that are
marked “High Level Out” (item 9) to the corresponding terminals
on the back of your front left and right speakers. This method
will also work for whole house audio distribution systems since
most multi-channel whole house audio amplifiers do not have a
line level subwoofer output. If the amp speaker level input is after
a speaker volume control, the 255R volume will track with the
volume control.
LiNE LEvEL cONNEctiON:
Use this method where the receiver /processor is equipped with a
subwoofer output or a volume-controlled preamp line level output.
Use RCA-type patch cords to connect the line-level inputs on the
255R (see item 12 Rear Panel Detail). If your receiver or amplifier
only has one subwoofer output jack, then you may connect the
subwoofer output on your receiver/preamplifier to either the left
or right line-level input on the 255R. It makes no difference which
jack you choose.
BALANcEd LiNE cONNEctiON:
This method is used when the 255R is placed between a
preamplifier and power amplifier that connect with 3-pin XLR type
connectors.
PHAsE cONtROL:
The Phase Control determines whether the subwoofer’s piston-
like action moves in and out in phase with the main speakers
or opposite the main speakers. There is no correct or incorrect
setting. Proper phase adjustment depends on several variables
such as subwoofer placement and listener position. Adjust the
phase switch to maximize bass output at the listening position.
Remember, every system, room and listener is different. There
are no right or wrong settings; this switch offers the added
flexibility to adjust your subwoofer for optimum performance for
your specific listening conditions. If at some time in the future you
happen to rearrange your listening room, you should experiment
with the phase switch in both positions, and leave it in the
position that maximizes bass performance.
cROssOvER AdjUstMENts:
The Crossover Frequency Control determines the highest
frequency at which the subwoofer reproduces sounds. If your
main speakers can comfortably reproduce some low-frequency
sounds, set this control to lower frequency setting, between 50Hz
– 80Hz. This will concentrate the subwoofer’s efforts on the ultra
deep bass sounds required by today’s films and music. If you are
using smaller bookshelf speakers that do not extend to the lower
bass frequencies, set the low-pass crossover control to a higher
setting, between 80Hz – 100Hz.
LEvEL cONtROL:
The Volume Control will adjust the level of the subwoofer relative
to the rest of the system. Proper level adjustment depends on
several variables such as room size, subwoofer placement, type
of main speaker and listener position. Adjust the subwoofer level
so that the volume of the bass information is pleasing to you.
The amplifier will track input level changes and adjust volume
relative to input source level changes. Front panel level control
determines the maximum level of output.
functions and features:
• Rack Mountable - Requires (2) Spaces (3.5”)
• Variable Low Pass Filter
• Auto On/Standby Function
• High Level Inputs and Outputs
• Line Level inputs and Outputs
• Balanced Line Inputs and Outputs
• DC Protected Fixed High Pass Filter
• Standby LED (Red), Blue When Active
• Output Monitor LEDs
• 115 VAC and 230 VAC Input Voltages
• Fan Cooled - 8 Speed Stages
• Phase Switch
Specifications:
• Mono Output Power:
250 watts at 8 ohms<0.05 THD
350 watts at 4 ohms<0.05 THD
• THD <0.05 @ 1 watt 4 ohms/100Hz
• S/N 86db Below Rated Output
• Crossover Section:
High Pass Filter: 18 Hz/30db/octave (fixed)
Low Pass Filter: 50 Hz to 100 Hz/ 41db/octave (variable)
• Current Draw: 6.2Amps @ 350W/4ohms/115VAC/60Hz
• Dimensions: 19” wide, 3.5” High, 13-3/5” deep
• Shipping Weight: 30 lbs./14 kg.
