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Stereo volume control with impedance magnification
Our take on the Russound ALTX-2D by Crutchfield's Marshall Chase
The Russound ALTX-2D makes controlling the volume of your in-wall or in-ceiling speakers a simple task. Instead of running up the stairs or down the hall to your receiver or amplifier, just reach for the knob on this handy control, which you can install right in the same room as your speakers. Choose the Decora® finish of the ALTX-2D for its stylish looks or to match existing wall plates in your home.
System expansion options
You can use up to eight of these impedance-magnifying stereo volume controls to safely drive up to eight pairs of speakers with a typical receiver or amplifier. You won't even need any additional speaker selector or protection device. For connecting up to four volume controls neatly and conveniently to your receiver or amplifier, use Russound's EZB-1SC connecting block, or add the EZB-2SC modular expansion unit for systems with up to eight pairs of speakers.
Custom-tailored advice before and after you buy
Installing this volume control usually requires you to run speaker cable in your walls, unless your home is already pre-wired. Our Audio/Video Designers can help you map out the details. Plus, our tech support specialists can help you through your installation step-by-step.
Good performance at a very reasonable price point
Ted S, Austin TX
What's in the Box:
- ALTx-2D in-wall volume control with white Decora insert and white volume knob installed
- White wall plate
- Almond wall plate
- Bone wall plate
- Almond volume knob
- Bone volume knob
- Almond Decora insert
- Bone Decora insert
- 2 Speaker screw terminals
- 2 Volume control installation screws (M3 x 20mm)
- 2 White painted wall plate screws (M3 x 10mm)
- 2 Almond painted wall plate screws (M3 x 10mm)
- 2 Bone painted wall plate screws (M3 x 10mm)
- Instruction Manual
- impedance-magnifying design
- power handling: 42 watts per channel
- adjustable impedance magnification (1x, 2x, 4x, and 8x)
- 4 ohm-stable amp: up to 16 pairs of 8 ohm speakers or 8 pairs of 4 ohm speakers
- 8 ohm-stable amp: up to 8 pairs of 8 ohm speakers or 4 pairs of 4 ohm speakers
- 11-step control, 48dB maximum attenuation
- accommodates up to 12-gauge wire
- installs in wall with a standard single-gang electrical box (not included)
- mounting depth: 2-1/2"
- 1-5/8"W x 2-5/8"H x 3-5/16"D
- warranty: 10 years
- Our 60-day money-back guarantee
Russound ALTX-2D Reviews
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Overview: 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 bone.
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, Decora insert, 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 feet, 14-gauge is recommended, while 12-gauge is recommended for runs of up to 200 feet.
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 speakers.
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 (item # 543EZB1SC) connecting block. The EZB-1SC can connect up to four volume controls to the amplifier's output. An EZB-2SC (543EZB2SC) is needed to expand the EZB1SC to another four volume controls.
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