Installation, Operation, Problem Action | Knoll MA225E specification

Installation

The MA225e 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 MA225e amplifier in high heat or humidity areas.

Connect the stereo source to the MA225e gold RCA jacks labeled INPUT using good quality short as possible RCA jack wires.

Connect the speakers to the MA225e 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 MA225e terminals.

Connect the power supply to the MA225e power jack. If the stereo source has a switched outlet we suggest plugging the 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 MA225e 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 MA225e turns off within a minute of not playing anything.

Operation

Turn the source on and confirm it is operating.

Turn the MA225e on by plugging in the power supply or switching the power supply on.

When the MA225e is playing something the led should be on. Within a minute of not playing anything the led should turn off.

Use the MA225e volume to turn the volume to the correct level.

Adjust the MA225e bass, treble and balance as desired.

Note: The MA225e amp may be hot to the touch after operating for some time. This is normal.

Knoll Systems service information

The MA225E 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 MA225e 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 MA225e 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. MA225e 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.

MA225E specifications

The Knoll MA225E is a leading-edge machine designed for precision machining and exceptional performance in a variety of industrial applications. With its robust build and innovative features, the MA225E has become a preferred choice for manufacturers seeking reliability and efficiency in their machining operations.

One of the standout features of the Knoll MA225E is its powerful and energy-efficient motor, which allows for high-speed machining while maintaining a low energy footprint. This not only reduces operational costs but also contributes to a more sustainable manufacturing process. The motor is coupled with advanced drive technology that ensures smooth operation, minimizing vibrations and extending the lifespan of the machine.

The MA225E utilizes state-of-the-art CNC (Computer Numerical Control) technology, enabling precise control over machining operations. This technology allows for the programming of complex geometries, ensuring consistent quality across multiple batches of production. The user-friendly interface of the CNC system simplifies the setup process and allows operators to make real-time adjustments, enhancing productivity.

In terms of design, the Knoll MA225E boasts a compact and ergonomic layout, making it suitable for various work environments, including those with limited space. The machine is equipped with high-quality components and a durable chassis, ensuring stability and precision during operation. Its architecture also facilitates easy access for maintenance and service, minimizing downtime.

Another key characteristic of the MA225E is its versatility. The machine is capable of handling a wide range of materials, from metals to plastics, thus fitting seamlessly into diverse manufacturing processes. This adaptability is complemented by a selection of interchangeable tooling options, allowing for customization based on specific production needs.

Safety features are paramount in the design of the Knoll MA225E. It includes built-in sensors and emergency stop options that protect operators and machinery alike. These safety protocols not only adhere to industry standards but also foster a secure working environment.

In summary, the Knoll MA225E is an exceptional machine that combines advanced technology with practical design. Its powerful motor, CNC capabilities, space-efficient layout, versatility in material handling, and robust safety features make it a key player in the world of precision machining. As industries continue to evolve, the MA225E stands out as a reliable solution for modern manufacturing challenges.