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In-Wall Volume Control: The Russound ALTx-2D is an in-wall volume control that fits
into a standard single-gang junction box. It comes with wall plates, Decora
inserts, and volume knobs in
white, almond, and light almond.
Ultra-Match Technology: The ALTx-2D's Ultra-Match technology allows you
to easily match the load of multiple speakers to the amplifier impedance without
the need for a speaker selector or other impedance-matching equipment. It
provides impedance matching for up to 16 pairs of speakers per system.
Performance: This in-wall volume control is designed to handle up to
42 watts RMS and 126-watts peak power. The built-in precision autoformers
produce high-fidelity sound with excellent frequency response (20Hz - 20kHz,
+1.0/-0.5 dB at rated power). It provides maximum power transfer from the
amplifier to the speakers without heat buildup.
Volume Knob: The ALTx-2D has a simple clean design with a simple knob,
and standard wall plate. The knob has 11 steps of volume, plus an off position.
The volume control provides a total of 48 dB attenuation.
Connections: The volume control has two 4-pole screw terminal blocks,
one for the input from the amplifier, and one for the output to a pair of
speakers. The terminals allow you to connect up to 12-gauge speaker wire. The
terminals can be unplugged from the volume control for easier wiring.
Speaker Wire Recommendations: For most applications, stranded 16-gauge
speaker wire is recommended. For runs of over 100', 14-gauge is recommended,
while 12-gauge is recommended for runs of up to 200'.
Jumper Settings: Each ALTx-2D has two sets of five jumper pins (five
for the left channel, and five for the right) on the back of the volume control.
The jumpers can be set to 1x, 2x, 4x, or 8x, depending upon the number of
speaker pairs being connected in the system. The jumper sleeves should be
configured the same for all speaker pairs in the system before connecting the
Amplifier Power Ratings: The amplifier should provide a minimum of 20
watts per channel RMS for each pair of speakers connected.
Speaker Impedance: The ALTx-2D is designed for speakers with impedances
of 4, 6, or 8 ohms.
EZB Connecting Blocks: When connecting multiple pairs of
speakers to the system, you will need a Russound EZB-1SC (543EZB1SC,
sold separately) connecting block. The EZB-1SC can connect up to four volume
controls to the amplifier's output. An EZB-2SC (543EZB2SC,
sold separately) is needed to expand the EZB1SC to another four volume controls.