Subwoofer
Amplifier
Dimensions

Subwoofer

Woofers: The VSi S8W2 in-wall subwoofer uses dual 8" DCD (Deep Channel Design) copolymer woofers with die-cast aluminum baskets. The subs are mounted to a cast aluminum baffle for rigidity and low resonance. The DCD woofers use a deeply grooved pole plate that enables the voice coil to travel farther for greater output without bottoming.

Amplifier: The VSi S8W2 sub is designed to work with the Boston Acoustics SA1 sub amplifier (included in this package). One SA1 amp can run up to two VSi S8W2 subs.

Inputs: Spring loaded posts will accept banana plugs (single or dual) or bare wire up to 12 gauge.

Paintable: Both the frame and grille can be painted to match the wall. A plastic paint mask is included to protect the drivers.

Optional Bracket: The NCBTL8 new-construction bracket (item number 065NCBTL8, sold separately) can be used to simplify installation in new construction.

Magnetic Grille: The grille is magnetically mounted for easy installation.

Installation: After a 19-7/16" x 11" cutout is made the speaker is installed into the opening and held in place with the integral plastic bracket. The required depth to install the speaker is 3-3/4" from the mounting surface (this includes the thickness of the drywall). Behind the mounting surface there must be a 1-1/2" clearance on both sides of the speaker (along the long sides). The mounting wall material must be at least 1/2" thick for the integral mounting bracket to work.

Amplifier

Overview: The SA1 amplifier is designed to be used with the Boston Acoustics line of installed subwoofers. One SA1 amplifier can power up to two of the same model subwoofer.

Variable Crossover: The amplifier has a built-in variable crossover that makes it easy to achieve a seamless blend with the main speakers, while the 24dB/octave low-pass filter prevents the subwoofer from being easily localized by the ear, increasing placement flexibility. The crossover point may be adjusted from 40-160 Hz.

Front Panel Controls:

• Phase Switch: switches the polarity of the two speaker outputs; the correct setting is that which yields the fullest bass
• Low-pass Knob: adjust the low-pass crossover point from 40-160 Hz
• Volume Knob: adjust the volume level up or down until the bass level of your subwoofer matches the bass level of your speakers

Rear Panel Controls:

• EQ Mode Switch: select Wall or Floor, depending where your subwoofer is located
• 12-volt Trigger Switch: choose one of the following settings:
  • On: amp is on whenever the front panel switch is in the On position
  • 12V: amp is in standby mode whenever the front panel switch is in the On position; the SA1 turns on when a 12-volt power supply triggers it
    • Note: Be sure to use a power supply that is rated 9 to 14 volts DC @ 1.5mA max, 1/8" diameter female plug with tip positive.
  • Music: amp is in standby mode whenever the front panel switch is in the On position; the SA1 turns on when an audio input signal triggers it

Rear Panel Connections:

• Line In: left and right RCA audio jacks; use this configuration if you wish to set the subwoofer crossover point using the SA1's low-pass control knob on the front panel or are using separate components, such as stereo preamplifier
• LFE/Xover Bypass: single RCA audio jack; in this configuration, the SA1's internal low-pass filter and front panel low-pass control knob will be bypassed
• Speaker A/Speaker B: gold-plated binding posts; the binding posts are not 5-way because a plastic collar prevents their use with spade lugs

Dimensions

Subwoofer:

• Width: 12.375"
• Height: 20.8125"
• Depth: 3.75"

Amplifier:

• Width: 19"
• Height: 3.705"
• Depth: 13.188"