Knoll MA215E warranty Installation, Operation, Knoll Systems service information Troubleshooting

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Installation

The MA215e amplifier does not have to be near the stereo equipment but long line level audio runs are not recommended. It is better to have long speaker wire runs rather than long line level source audio wire runs.

If long line level audio runs are required, we suggest using the Knoll UTP stereo balun balancing system to avoid electro magnetic interference. Avoid installing the MA215e amplifier in high heat or humidity areas.

Connect the stereo source to the MA215e gold RCA jacks labeled INPUT using good quality short as possible RCA jack wires.

Connect the speakers to the MA215e using good quality 18-12 gauge wires. If the wires are mounted inside a wall, fire rated wire may be required. Speaker polarity is important. Wrong polarity or out of phase speaker wiring will make the bass response of the speakers poor. Carefully check that the + of speakers are connected to the + of the MA215e terminals.

Connect the PS1524 power supply to the MA215e power jack. If the stereo source has a switched outlet we suggest plugging the PS1524 power supply into the switched outlet.

Plug the power supply or supplies into the wall. After the system powers up and the source is on and running, adjust the volume/gain and on the MA215e adjust the balance, bass and treble as needed.

The sensitivity adjustment on the side of the amp lets the amp know when to turn on and off. If the line noise is high the sensitivity should be adjusted a tiny bit up so when no signal is present the MA215e turns off within a minute of not playing anything.

Operation

Turn the source on and confirm it is operating.

Turn the MA215e on by plugging in the power supply or switching the power supply on.

When the MA215e is playing something the led should be on. Within a minute of not playing anything the led should turn off.

Use the MA215e volume to turn the volume to the correct level.

Adjust the MA215e bass, treble and balance as desired.

Note: The MA215e amp may be hot to the touch after operating for some time. This is normal.

Knoll Systems service information

The MA215E amplifier does not contain any user serviceable parts inside. If you suspect a problem that may require servicing, contact us at www.knollsystems.com/contact.html, or by phone at 800 566-5579.

Troubleshooting

If a problem is encountered with the MA215e amp, the most expedient procedure is to locate the problem and if possible repair it before requesting service. Be sure to carefully check other system components such as controllers, CD players, volume controls, wiring, speakers, etc. that may be at fault.

Problem

Action

Power LED does

1.

Check that the amp power supply is

not light - no sound

 

plugged in.

 

2.

Test the AC outlet with a lamp.

Sound cuts out

1.

Verify speaker impedance is 2-16

ohms.

 

Changing speakers may be required.

 

2.

Check if the MA215e feels hot. If it's

 

 

hot increase cooling.

Sound is distorted 1. Turn the volume down.

2.Check speakers for damage.

3.Check inputs for proper levels. MA215e gain and source output level may have to be adjusted.

4.Speakers may be less than 4 ohms.

Speaker pops when 1. Speaker may need resistor placed amp turned on or off across terminal. Suggest 2k0 1/4 w.

This resistor discharges the speaker internal capacitor.

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Contents MA215e Amplifier SpecificationsWarranty Knoll SystemsProblem Action InstallationKnoll Systems service information Troubleshooting Operation

MA215E specifications

The Knoll MA215E is a cutting-edge office chair designed to enhance comfort and efficiency in the workplace. Combining ergonomic support with sleek aesthetics, this chair is not just another piece of furniture but a well-thought-out product aimed at improving productivity.

One of the standout features of the MA215E is its adjustable lumbar support. This feature is critical for individuals who spend long hours seated, as it helps maintain proper spinal alignment and reduces fatigue. The chair’s backrest can be easily adjusted to accommodate users of varying heights and preferences, ensuring that everyone can find their optimal seating position.

Another important aspect of the MA215E is its seat height adjustment mechanism, which allows users to customize the chair to their ideal level. With a simple lever, one can effortlessly lower or raise the seat to facilitate comfort and improve the ergonomic angle of the legs, which is vital for blood circulation.

The armrests of the Knoll MA215E are another area where the chair excels. They are not only adjustable in height but also feature a pivot design, which allows for a natural range of motion. This function enables users to move their arms freely while typing or using a mouse, further enhancing comfort during long working sessions.

Made from high-quality materials, the MA215E integrates durable fabric and a sturdy base that guarantees longevity. Its elegant design contributes to a modern office aesthetic, making it suitable for various environments, whether corporate or creative. Moreover, the chair is available in a variety of colors, allowing organizations to choose options that align with their branding.

In terms of technology, the MA215E features a synchronous tilt mechanism, which promotes a natural seating posture. As the backrest reclines, the seat angle changes accordingly, ensuring that users remain comfortable, whether they are seated upright or leaning back.

Furthermore, the chair is designed with sustainability in mind. Knoll is committed to eco-friendly production practices, and the MA215E is constructed from materials that meet stringent environmental requirements. This means that choosing this chair not only benefits the user’s health but also contributes positively to the planet.

In summary, the Knoll MA215E is an exemplary office chair that boasts a blend of comfort, adjustability, and style. Its advanced ergonomic features, high-quality materials, and focus on sustainability make it an excellent choice for modern work environments, ensuring that users can work effectively and comfortably.