4. Clip Signal LED
3. Protection LED
2 . Power LED
ON
OFF
POWER
1
1 . Mains Switch
1. INTRODUCTION
Thank you very much for expressing your confidence in LTO products by purchasing our MAC 2.2/2.3/2.4 Stereo Power Amplifier. With the MAC 2.2/2.3/2.4 you have acquired an extremely musical and flexible high power amplifier which is based on many years of experience and finding in amplifier technology and is used through the world in the renowned studios. The MAC 2.2/2.3/2.4 is used for professional output of stage stereo with excellent performance. Output power can be adjusted at the user's demand, and the sound quality and protecting circuit are both sophisticated.
The front panel presents you with 6 LEDs (power LED, protection LED, clip & signal LED for each channel) and 2 level controls, you can operate this unit more precise and easier. The output connectors are speak-on jacks and binding post terminals, which are used for better matching. Before connecting this unit into your sound system, please make sure it is powered down to prevent any electric shock.
2. FEATURE LIST
Sophisticated protecting circuit protects the machine from improper tampering
Excellent frequency echo and sound quality
High fidelity and low noise
Balanced XLR and 1/4" TRS input connectors
Output connectors are speak-on jacks and binding post terminals
Stereo mode, parallel mode and bridged mode are available
High-speed and low noise fan for releasing heat. The inside temperature determines the fan speed.
Indicator for the output balance, as well as status indicators of SIG and CLIP. When there is any signal is more than 100mV, the SIG LED lights up. When there is overload, the CLIP LED lights up. If anything abnormal happens to the circuits, the CLIP LED will be continuously on, with no action from the circuits. This helps the user todetermine which status it is in.
Solid and durable, can be mounted into a cabinet
Manufactured under QS9000, VDA6.1 certified management system
3. CONTROL ELEMENTS
3.1 Front Panel
2 3

CH1CH2

POWER PROT

CLIP

SIG

4 5

1

This switch turns on and off the unit by controlling both phases.

2

This Power LED lights up when the unit is powered up.

3

This red LED lights up when the thermal-protection system is working, no signal is output during this protection period. When any overheating occurs inside the unit (the critical temperature is 800C), you should speed up the air circulation or decrease the signal level for avoiding overheating. If the problem is corrected the protection systems deactivate automatically, this LED goes out, and the normal amplifier operation is resumed.

4

The clip LEDs light up when distortion reaches or exceeds 0.5% approximately, which means the unit is being driven by excessively high signal source, and you'd better adjust the level control until these LEDs go out.

4

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Nilfisk-ALTO MAC 2.2, MAC 2.3, MAC 2.4 user manual CH1CH2
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MAC 2.2, MAC 2.3, MAC 2.4 specifications

Nilfisk-ALTO has long been recognized for its innovative cleaning solutions, and the MAC series, encompassing the MAC 2.2, MAC 2.3, and MAC 2.4 models, exemplifies the brand’s commitment to quality and efficiency in high-performance vacuum cleaning. These machines are designed to meet a variety of industrial and commercial cleaning demands, providing effective solutions tailored for professional users.

The MAC 2.2 model is known for its compact design without compromising power. It features a robust two-stage motor that delivers a strong suction performance, able to tackle both wet and dry debris with ease. Ideal for small to medium-sized applications, the MAC 2.2 is equipped with an easy-to-use control panel for effortless operation. Additionally, it boasts a durable filter system that ensures optimal airflow while maintaining cleanliness even in the toughest conditions, making it suitable for environments such as workshops, garages, and small industrial settings.

Progressing to the MAC 2.3, this model introduces increased capacity and additional features designed for larger jobs. With enhanced filtration technology, users benefit from improved dust containment and air quality, making it particularly beneficial in areas with strict hygiene requirements. The MAC 2.3 features a user-friendly design, complete with a large collection tank and a semi-automatic filter cleaning system that prolongs the life of the filter and maintains consistent suction power.

Finally, the MAC 2.4 takes performance to the next level, designed for heavy-duty applications. This model boasts a powerful motor, capable of handling significant volumes of debris while maintaining noise levels within acceptable limits. The MAC 2.4 includes advanced features like an ergonomic handle and an easy-glide caster wheel system, ensuring maneuverability and user comfort during prolonged use. One of its standout characteristics is its innovative sound reduction technology, which minimizes operational noise without sacrificing performance.

All three models share the hallmark of Nilfisk-ALTO design philosophy, focusing on durability, ease of use, and cleaning efficiency. Each machine is equipped with high-quality materials, ensuring longevity and reliability, even under demanding conditions. The MAC series is also environmentally conscious, with reduced energy consumption and improved dust control, supporting cleaner work environments.

In summary, the Nilfisk-ALTO MAC series, through its MAC 2.2, MAC 2.3, and MAC 2.4 models, offers a comprehensive range of industrial vacuum solutions that enhance cleaning processes with their robust features, user-centric design, and advanced technologies. These models are ideal choices for professionals seeking reliable, efficient, and powerful vacuum cleaning solutions.
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