Knoll 21K Power connection, Amplifier operation, 21k Manual on, Bridge Mode

Page 8

When installing, make sure the 21k front panel power switch is in the out or “OFF” position. Plug the DC adapter into a switched outlet on the source device that will be activated when you want to have the amplifier turn on. This may be the switched outlet at the rear of an AC receiver or other audio equipment. Connect the 3.5mm mini-plug from the adapter to the trigger-input jack on the back panel of the amplifier. The amplifier now turns on and off automatically, based on the status of the controlling device.

Power connection

 

-

+

 

1 2 VDC 45 mA

IN

OUT

 

Le ft

Tri gg er In put

 

 

L

 

 

Sp e ake rs

 

 

 

 

 

R

 

 

 

High Current

 

 

R igh t

21K Power Amplifier

 

 

 

 

 

 

 

BRIDGE Gain L

R

 

 

Power

 

 

8 A

(OUT)

2-16 OH M

 

 

 

SPEAK ERS

 

120 VAC

 

 

 

 

~ 60 Hz

Bridge switch must be in OUT postion.

SOURCE

Connect speakers to RED terminals.

+

 

 

 

Minimum speaker impedance is six (6) ohms.

-

Power connection. Observe correct voltage.

Once all audio system connections have been made, connect the supplied power cord to the amplifier first, and then connect it to an AC power source. Please make certain that the amplifier is turned off and that the device connected to the remote trigger input is off when connecting the power cord and plugging it into an AC outlet.

Amplifier operation

After all connections have been made you are ready for operation. First, turn on the source component in your system.

It is always a good idea to turn on your amplifier LAST.

This avoids the possibility of any turn on pops or transients from other equipment being amplified and sent to your speakers where they may cause damage. Always start with a low volume level on your computer or preamp to avoid damage to your speakers.

21k Manual on

Press the 21k front power switch to the “on” position. There will be a short pause from the time the power is turned on until power is applied to the speakers. This is intentional and protects your speakers from damage while the amplifier stabilizes. The red protect lamp will glow and when the amp is ready a blue light will switch on. To turn the unit off, press the power button again (out position). The amp will turn off in a few seconds.

Bridge Mode

The 21K can be put into the mono bridge mode to increase the power output.

To do this, first make sure the 21K is powered down or off. Speaker damage could occur if it is powered up.

Connect the source RCA jack to the left input. The left RCA source output can be sent to another amplifier input.

Make sure the bridge switch is in the out position.

Connect the speaker (minimum 6 ohms) to the two red speaker terminals on the 21K. The left red terminal on the 21K is connected to the speaker positive (+) input. The black 21K speaker terminals are not connected in the bridge mode.

Turn the Left gain on the 21k all the way down (counter clockwise).

Turn the source on and the power to the 21k and adjust the Left gain as desired.

Enjoy.

Image 8
Contents 21K Stereo amplifier specifications 21KImportant Safety Instructions Placement Rack mountingPotential ground loops in a complex A/V system TroubleshootingHum and noise Connecting your amplifier Getting to know the rear panelInput connections Speaker connectionsGain controls AC line connector and power cord Protection circuitry21k Automatic on Power control connections Making rear panel connectionsPower connection Bridge ModeAmplifier operation 21k Manual on

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.