Passive Radiator Design: A front firing, 8" custom Sunfire driver is
acoustically matched to an 8" down-firing passive radiator, creating nearly
double the output compared to conventional single-driver designs
200W Amp w/ Soft Clipping Circuit: Sunfire's digital amplifier
delivers 200W or RMS output and 400W of Peak output. A compressor circuit kicks
in automatically if the input signal level reaches a level that would overload
the driver. This maintains a ceiling on the output without clipping. If the
input signal is driven even further, a Soft Clipping circuit is enabled to
prevent driver damage.
Controls: Controls for adjusting the volume, crossover
frequency and phase, allow the subwoofer to be perfectly matched to any
listening environment and audio components.
- Level: This control lets you match the output level of
the subwoofer to the level of your other speakers. The subwoofer output will
increase as this control is
- Crossover: This control changes the high frequency
cutoff point. With the control set to 150 Hz, the subwoofer will reproduce
frequencies up to 150 Hz. If the control is set fully clockwise, the
crossover is bypassed and the subwoofer will reproduce a wide frequency
range. With the control fully counter-clock wise the subwoofer reproduces a
narrow range, up to 50 Hz. Rotate the control until the bass sounds natural.
If the mid-bass sounds natural but you want more low bass, turn this control
down a little, then turn the Volume control up by about the same amount.
This increases the low-bass output while leaving the mid-bass output the
- Phase: This control changes the relative phase (0°-180°)
of the subwoofer with respect to the other speakers. Use this control to
help blend the subwoofer with the rest of the sys tem. This is accomplished
by adjusting the control in small increments as you listen for the most bass
at your listening position. As a final adjustment, readjust the Crossover
Frequency and Volume controls after the Phase has been set.
Connections: The Sunfire SDS-8 powered sub is fitted with RCA inputs
- LFE/RCA Inputs: Connect these unbalanced inputs with RCA-type
patch cords to the line-level outputs of your receiver or preamp. If your
preamplifier or receiver has a single sub/LFE output, connect it to Left RCA
- Line-Level Outputs: These stereo RCA output jacks are a copy of
the signals going into the powered sub's inputs, except the bass has been
removed by a fixed high-pass crossover circuit (85Hz). The output is not
affected by the subwoofer's controls.
Auto Turn-On/Standby: The powered subwoofer has a special
power circuit which automatically turns the powered subwoofer on when a signal
is fed to the loudspeaker and turns it off when there is no signal present
(approximately 15 minutes).
Placement: Although low frequencies are non-directional,
factors such as room reflections, standing waves, resonance and absorption will
strongly affect your subwoofer's performance. Moving the subwoofer from one
location to another can have a major effect on the bass response. The Sunfire
SDS-8 powered subwoofer is designed to be placed in a corner for optimum
Optional Wireless Kit: An optional wireless kit (sold separately) is
available that will allow the subwoofer to receive audio input without the need
for a long subwoofer cable run.
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