To Next PageTo Next Page
Need help?Do you have a question about the APART E-VOL20 and is the answer not in the manual?
Lists key technical details including handling power, voltage, priority features, attenuation steps, dimensions, and color.
Details the components needed and operation of the priority relay system for emergency announcements.
Enlists technical specifications for E-VOL40: power, voltage, priority, steps, dimensions, weight, color.
Lists technical specs for E-VOL60: power, voltage, priority, attenuation steps, dimensions, weight, color.
Offers critical warnings against power overload, clipped levels, and suggests using APART speakers.
Lists technical specs for E-VOL120: power, voltage, priority, attenuation steps, dimensions, weight, color.
Lists technical specs for E-VOLST: stereo power, impedance, priority status, attenuation steps, dimensions.
Lists key technical details including handling power, voltage, priority features, attenuation steps, dimensions, and color.
Details the components needed and operation of the priority relay system for emergency announcements.
Enlists technical specifications for E-VOL40: power, voltage, priority, steps, dimensions, weight, color.
Lists technical specs for E-VOL60: power, voltage, priority, attenuation steps, dimensions, weight, color.
Offers critical warnings against power overload, clipped levels, and suggests using APART speakers.
Lists technical specs for E-VOL120: power, voltage, priority, attenuation steps, dimensions, weight, color.
Lists technical specs for E-VOLST: stereo power, impedance, priority status, attenuation steps, dimensions.
The APart E-VOL20 is a 100 Volt volume control designed for audio systems, capable of handling up to 20 watts of power. Its primary function is to provide precise volume adjustment for loudspeakers within a 100V line system. The device features a durable, step-by-step attenuation mechanism, offering 11 distinct volume steps plus a zero-position for complete silence. This granular control allows users to fine-tune audio levels to suit various environments and preferences. A key feature of the E-VOL20 is its integrated 24V priority relay. This relay ensures that, regardless of the volume control's current setting, a microphone call or emergency announcement will always come through at maximum volume. This is particularly useful in public address systems where critical information must be heard clearly, even if background music is turned down or off. The priority function is activated by a 24V signal, which overrides the local volume setting to ensure the message is delivered effectively.
The E-VOL20 is built on a universal chassis, making it highly versatile for integration into various installation environments. It is compatible with standard European installation systems such as Gira, Jung, and Euro, allowing for seamless incorporation into existing electrical infrastructure. Different cover plates are available to match specific aesthetic requirements, including options for the UK market. This adaptability simplifies installation and ensures a consistent look with other wall-mounted controls.
For optimal performance and longevity, several usage and maintenance considerations are highlighted. Users are strongly advised to avoid power overload by accurately measuring speaker line impedance before connecting the device. It's important to note that many speakers may have a higher actual load than their listed specifications, so careful measurement is crucial. APART speakers, however, are specifically engineered to operate within their stated specifications, minimizing the risk of overload when used with APART amplifiers. The manual emphasizes never applying clipped or overloaded audio levels from an amplifier to the volume control, as this can lead to overheating and potential damage to the unit. APART amplifiers are designed with automatic limiting to prevent such distorted signals, further protecting the volume control.
When setting up a priority system, additional components are required. These include the volume controller with its priority relay, an amplifier equipped with a 24V priority output contact (capable of supplying 24V / 1A to connect up to 50 volume controllers), and a 4-wire cable connection. A microphone, such as the MICPAT-D, is also necessary to initiate priority calls. The priority relay system can be configured in two main ways. By default, with jumpers set on positions 2-3 and 5-6, the relay bypasses the volume control to achieve maximum level when 24Vdc is applied, ensuring emergency announcements are heard clearly. For special safety applications requiring an inverted operation mode, the jumpers can be moved to positions 1-2 and 4-5. In this configuration, the 24Vdc signal keeps the relay activated for normal operation with the volume control. When the 24Vdc is cut off, the volume control is bypassed and set to maximum, providing an alternative fail-safe mechanism.
Mounting the E-VOL20 requires attention to detail to ensure proper function and safety. It is crucial to keep the inside of the wallbox clear of all wires to prevent short circuits between the wires and the printed circuit board of the volume controller. The screw connectors on the printed circuit board are specifically designed for flexible wires, so solid copper conductor wires should not be used. Furthermore, only one wire should be connected to each onboard screw connector. When mounting the volume controller in the wallbox, force should not be applied to avoid damage to the unit or the wiring. These guidelines ensure a secure and reliable installation, contributing to the overall durability and performance of the volume control.
The E-VOL40 is a similar 100 Volt volume control, but it is designed to handle up to 40 watts of power. Like the E-VOL20, it features 11 step-by-step attenuation levels plus a zero position and includes a 24V priority relay for emergency announcements. It shares the same universal chassis compatibility with Gira, Jung, and Euro systems, and offers various cover plates for aesthetic integration. The usage and maintenance recommendations for the E-VOL40 are identical to those for the E-VOL20, emphasizing the importance of avoiding power overload, using appropriate wiring, and following careful mounting procedures to prevent damage and ensure reliable operation. The priority system setup, including the need for an amplifier with a 24V priority output and a microphone, also mirrors the E-VOL20's requirements, allowing for consistent system design across different power ratings.
The E-VOL60 extends the range further, capable of managing up to 60 watts of power in a 100 Volt line system. It retains the core features of its lower-power counterparts, including the 11-step attenuation with a zero position and the crucial 24V priority relay. This ensures that, even with higher power demands, critical announcements are always prioritized and delivered at maximum volume. The universal chassis design and availability of various cover plates for Gira, Jung, and Euro systems remain consistent, facilitating easy integration into diverse architectural settings. All the usage precautions, such as avoiding power overload, using flexible wires, and proper mounting techniques, are equally applicable to the E-VOL60 to ensure its long-term reliability and prevent damage. The priority system configuration, requiring an amplifier with a 24V priority output and a microphone, is also identical, providing a scalable solution for different power requirements while maintaining consistent control functionality.
The E-VOL120 is the highest power variant in this series of 100 Volt volume controls, designed to handle up to 120 watts of power. It shares the same robust features as the other models, including the 11-step attenuation with a zero position and the essential 24V priority relay. This ensures that even in systems with significant power output, emergency messages or microphone calls will always override local volume settings and be broadcast at maximum level. The E-VOL120 also benefits from the universal chassis design, making it compatible with Gira, Jung, and Euro installations, and offers various cover plates for seamless aesthetic integration. The detailed usage and maintenance guidelines, including avoiding power overload, careful wiring practices, and proper mounting, are critical for the E-VOL120 to ensure its reliable and safe operation in high-power audio systems. The priority system setup, requiring an amplifier with a 24V priority output and a microphone, follows the same principles as the other models, providing a consistent and dependable priority override function across the entire range.
In contrast, the APart E-VOLST is a stereo volume control designed for standard HiFi amplifiers, handling up to 2 x 40 watts in a 4-ohm system. Unlike the 100V line volume controls, the E-VOLST does not feature a 24V priority relay, as its application is typically in home or commercial stereo setups where priority announcements are not a primary concern. It offers 10 steps of attenuation for precise volume adjustment in a stereo environment. The E-VOLST is also built on a universal chassis, ensuring compatibility with Gira, Jung, and Euro systems, and various cover plates are available for aesthetic matching. For this device, it is crucial not to connect a loudspeaker with an impedance lower than 4 ohms, as this can permanently damage the unit. The general mounting guidelines, such as keeping the wallbox clear of wires, using flexible wires, and avoiding force during installation, are also applicable to the E-VOLST to ensure a safe and reliable setup. This model caters to different audio system requirements, focusing on stereo volume control rather than 100V line distribution with priority functions.
General| Type | Volume Control |
|---|---|
| Power | 20W |
| Attenuation | 11 steps + off |
| Impedance | 8 Ohms |
| Input Voltage | 100V |
