SP Controls SLB-SBOX+50W-BL, SLB-SBOX+100W-WH, SLB-SBOX+50W-WH, SLB-SBOX+70V-BL, SLB-SBOX+70V-WH Safety Instructions

930 Linden Avenue • South San Francisco, CA 94080 • www.spcontrols.com

SmartBox+ Amplifier Preliminary Instructions

The SmartBox+ Amplifiers provide audio amplification in a compact housing ready-made for easy
installation to the bottom of your SP Controls SmartBox+ wall mounting (sold separately). Left
and Right Gain are independently set with a screw adjustment. Power and left and right cli pping
are indicated by red LED’s. A 120V AC convenience outlet is provided for powering a laptop or
other device.

Three models are currently available:

SLB-SBOX+50W-BL (Black)
SLB-SBOX+50W-WH (White)

SLB-SBOX+100W-BL (Black)
SLB-SBOX+100W-WH (White)

SLB-SBOX+70V-BL (Black)
SLB-SBOX+70V-WH (White)

Stereo, 25 Watts per channel @ 8 ohms (or 50 watts per
channel at 4 ohms)

Stereo, 100 Watts per channel @ 8 ohms or 4 ohms

Mono, 100 Watts @ 70 volt output

Installation

The SmartBox+ Amplifier should be attached to the SmartBox+ in the final stages of assembly of
the SmartBox+. The SmartBox+ should be fully assembled with the exception of the two side
panels covering the wiring.

The top cover of the SmartBox+ Amp should be attached to the bottom of the SmartBox+ with the
4 Philips pan head screws and washers (provided). Screw down from the SmartBox+ into the
four screw holes to attach to the four screw holes in the lid of the SmartBox+ Amp.

Once the SmartBox+ Amp is connected to the SmartBox+, you are ready to make the necessary
audio connections. The audio input connection is pre-terminated with a 5-position terminal block
connector for easy connection to the SP Controls AFVP+ Preamp Switcher (SP3-AFVP+). The
audio out to the speakers are called out below in Technical Specifications. Connect audio out to
your speaker wire with the wire nuts provided. All wires should be routed up along the open sides
of the SmartBox+ before the sides are attached. Power should be routed up one side and
speaker/line level on the other.

The final step of installation is to complete assembly of the SmartBox+ by reattaching the left and
right sides of the unit. The bottom front corners of the SmartBox+ sides are cut with two screw
holes to secure the sides of the SmartBox+ which cover the wiring. Instead of using the short
screws included with the SmartBox+, use the two long screws included with the SmartBox+ Amp.
They should screw up through the front corners of the SmartBox+ Amp and into the bottom of the
side panels of the SmartBox+ to secure the sides.

Power Status

(Red LED)

Power

Left Clipping

Indicator (Red LED)

Left Gain Adjust

(screw adjustment)

Right Clipping

Indicator (Red LED)

Right Gain Adjust

(screw adjustment)

Specifications

Specs

Frequency Response +/- 0.5dB 20Hz-20kHz
Bandwidth –3dB 5Hz-100kHz
Noise (A weighted) >100dB below full rated output
THD (8 ohms) 20 Hz-20kHz <,08%
Input Impedance 20Kohms
Input Sensitivity for Rated Output (8ohms) 1v
Slew Rate 30V/microsecond
Damping Factor >200/8 ohms

Power Requirements

SP2-SBOX+50W and SP2-SBOX+70V 120 AC 100W
SP2-SBOX+100W 120 AC 200W
Power Supply Design High Speed Switching
Dimensions
Height 2-1/2”
Width 20-3/8”
Depth 6-1/8”
Weight TBD
Speaker Connections
White Left Chn +
Green Left Chn ­ Red Right Chn +
Black Right Chn –

120V AC

Convenience Outlet

(always on)