Why Choose Crutchfield?
Great gear and expert advice
Our experts help you pick the ideal gear for your needs.Meet our advisors
Free tech support for the life of your gear.Read about our one-on-one expert help
You may return items that are complete and like new for any reason within 60 days.See the details of our return policy
Earn one point for every dollar you spend and use those points to save on future purchases.Get full details on Crutchfield Rewards
Deep discounts on car installation gear
We offer vehicle-specific installation instructions, dash kits, wiring harnesses, and speaker accessories at deeply discounted prices with car stereo and speaker purchases. Available for most vehicles.Learn more
Trusted since 1974
Our customers have trusted us with their business, and they’ve helped us win awards for our service.Check out our most recent awards
The manufacturer’s warranty always applies.See more details
Stereo volume control with impedance matching
Item #: 543ALTX22
This item is no longer available.
Our take on the Russound ALTx-2 by Crutchfield's Marshall Chase
Convenient volume control
Russound puts control of your in-wall and in-ceiling speakers at your fingertips. The ALTx-2 electronic volume control offers easy operation as well as built-in impedance-matching circuitry that makes it easier to outfit several rooms with speakers.
Safely connect multiple pairs of speakers
You can use up to eight of these impedance-matching 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 even more 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.
What's in the Box:
- ALTx-2 in-wall volume control
- White wall plate
- Almond wall plate
- Light almond wall plate
- White volume knob (installed)
- Almond volume knob
- Light almond volume knob
- 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 Light almond painted wall plate screws (M3 x 10mm)
- Instruction Manual
- connect up to 8 pairs of speakers to a single 8-ohm-rated stereo amplifier (requires 1 volume control per speaker pair)
- power handling: 42 watts per channel
- adjustable impedance magnification (1x, 2x, 4x, and 8x)
- 4-ohm amp: up to 16 pairs of 8-ohm speakers or 8 pairs of 4-ohm speakers
- 8-ohm 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
- includes three colors of wall plates and knobs: white, light almond, and almond
- installs in your wall with a standard single-gang electrical box (not included)
- 2-3/4"W x 4-1/2"H x 3-7/16"D
- warranty: lifetime
- Our 60-day money-back guarantee
In-Wall Volume Control: The Russound ALTx-2 is an in-wall volume control that fits into a standard single-gang junction box. It comes with wall plates and volume knobs in white, almond, and light almond.
Ultra-Match Technology: The ALTx-2'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-2 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-2 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-2 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.
Our Product Research Team
At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.
1 question already asked
I don't know if you can get replacements, but the package comes with three plates and three knobs. One in each color. [ MICHAEL Apr 10, 2015 ]