21k Automatic on, Gain controls | Knoll 21K instruction

turn off, check your speakers to verify that they are operating properly. If all other potential sources of trouble check out properly, contact Knoll for further assistance.

Knoll Systems service information

The 21K 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. It is extremely important that only an authorized service dealer make any repairs. This will ensure proper service and preserve the protection of your warranty. Keep your receipt in a safe place so that it will be available to verify the purchase date, should you experience a problem covered by Knoll System’s warranty.

Care, maintenance, and cleaning

When the 21k amp becomes dirty, wipe it with a clean, dry, soft cloth. If necessary, first wipe the surface with a slightly dampened soft cloth with mild soapy water, then with a fresh cloth dampened with clean water. Wipe dry immediately with a dry cloth. NEVER use benzene, thinner, alcohol, or any other volatile cleaning agent. Do not use abrasive cleaners, as they will damage the finish of the metal parts. Avoid spraying insecticide, waxes, polishing agents, or any aerosol product near the 21K.

21k Automatic on

Make certain that the connection to the controlling device is correct. Whenever the controlling device is turned on, the amplifier will automatically turn on after a short pause. This pause is intentional and it protects your speakers from damage while the amplifier stabilizes. You may also hear a relay click during start up. This is also normal.

To turn off your amplifier, just turn off the device feeding the amplifier its audio signals. The amplifier will automatically turn off, which takes a few moments.

Gain controls

Level adjustments may be made at the rear of the amplifier. The circuitry in your new amplifier may be different from your previous one. Check the output levels to make sure that the control device amplifier and speakers are properly matched. Adjust these controls carefully as they operate in conjunction with the volume control(s) on your source device. Turn down the volume control(s) on the source device before adjusting the controls on the amplifier.

AC line connector and power cord

Warning: Under no circumstances should the round third prong on the plug be cut, bent or in any other way defeated as this may result in severe shock. Always turn off the amplifier and unplug the power cord before making any electrical connections.

Protection circuitry

Your Knoll amplifier uses an advanced protection circuit. The output will be cut off if excessive low frequency (below 10 Hz) is present, if the amp over heats or has excessive current demands. The amplifier will begin to operate normally after the over heating or excessive low frequency. Should this occur, check all speaker wire connections, both at the speaker terminals on the back of the amplifier to make certain that none of the strands from any channel touch another channel, and that none of the strands from a “positive” terminal touch strands from a “negative” terminal. Even a few stray wires can cause the amplifier to go into the protection mode. After checking all speaker connections, turn the unit back on. If it continues to

21K specifications

The Knoll 21K is a state-of-the-art ergonomic office chair designed to enhance workplace comfort and productivity. With its cutting-edge features and technologies, the 21K epitomizes modern seating solutions tailored for the dynamic office environment.

One of the standout characteristics of the Knoll 21K is its sophisticated lumbar support system. This feature has been engineered to promote healthy posture and reduce the risk of back strain during long working hours. Users can easily adjust the lumbar support to fit their individual needs, allowing for a customizable seating experience that caters to diverse body types.

The chair is built with advanced materials that not only provide durability but also contribute to its lightweight design. The breathable mesh backrest ensures optimal airflow, helping to keep the user cool and comfortable even in warmer conditions. In addition, the seat cushion is crafted from high-density foam that contours to the body, further enhancing comfort and support.

Another key feature of the Knoll 21K is its refined tilt mechanism. The chair offers a synchronized movement that allows the seat and backrest to tilt together at an optimal angle. This encourages dynamic movement and provides the user with the ability to shift positions effortlessly throughout the day. Additionally, users can easily lock the chair in an upright position or adjust the tension of the tilt to their preferences, enhancing the overall experience.

The armrests of the Knoll 21K are another highlight, featuring adjustable height and width settings. This flexibility ensures that users can find the most comfortable position for their arms, alleviating strain in the shoulders and neck. The chair also boasts a five-star base with smooth-rolling casters, enabling effortless mobility across various office surfaces.

To further enhance the chair's functionality, the Knoll 21K comes in a variety of colors and finishes, allowing businesses and individuals to personalize their workspace according to their aesthetic preferences. This customization not only elevates workplace design but also reflects the user's identity and style.

In summary, the Knoll 21K is a pinnacle of ergonomic design, featuring adjustable lumbar support, breathable materials, a synchronized tilt mechanism, and customizable armrests. Its combination of comfort, flexibility, and style makes it an ideal choice for anyone seeking to improve their sitting experience in the modern office. With its innovative technologies, the Knoll 21K is not just a chair; it's an investment in better health and productivity.