คู่มือผู้ใช้ลำโพงมอนิเตอร์สตูดิโอแบบแอคทีฟ Neumann KH 120 A

1. บทนำและเรื่องอื่นๆview

The Neumann KH 120 A is a compact, high-performance active studio monitor designed for professional audio applications. It serves effectively as a near-field loudspeaker or as a rear loudspeaker in larger multi-channel systems. Developed using advanced acoustic and electronic simulation technologies, the KH 120 A delivers reference-quality sound reproduction, making it ideal for critical listening, mixing, and mastering tasks in music, broadcast, project, and post-production studios.

Key features include a Mathematically Modeled Dispersion™ (MMD™) waveguide for smooth off-axis response, flexible acoustical controls for environmental adaptation, and bi-amplified Class-AB analog amplifiers ensuring exceptional transient response and dynamic range. Its robust aluminum cabinet minimizes resonances and provides efficient heat dissipation, while wide-range input gain and output level controls allow for easy integration with various signal sources.

This image displays the front of the Neumann KH 120 A studio monitor, highlighting its compact design and the distinct woofer and tweeter components.

2. อะไรอยู่ในกล่อง

Upon unboxing your Neumann KH 120 A Studio Monitor, please verify that all the following components are included:

• Neumann KH 120 II Studio Monitor
• 2 Mains Cables
• 4 เท้ามีกาวในตัว
• Operating Manual (This document)
• คู่มือเริ่มต้นอย่างรวดเร็ว

3. คุณสมบัติหลัก

The Neumann KH 120 A Studio Monitor incorporates several advanced features designed for superior audio performance:

• สอง -amplified Design: Features 50W + 50W two-way monitoring with a 5.25-inch long-throw woofer and a 1-inch titanium fabric dome tweeter.
• การผลิตที่แม่นยำ: Manufactured to ±0.5dB tolerance, ensuring perfectly matched pairs for superb sound stagไอเอ็นจีและการถ่ายภาพ
• ตัวเรือนที่แข็งแรงทนทาน: Compact and rugged, non-resonant aluminum enclosure effectively eliminates unwanted cabinet-induced coloration.
• การตอบสนองความถี่กว้าง: Offers a free-field frequency response of 52 Hz - 21 kHz, ±3 dB.
• Mathematically Modeled Dispersion™ (MMD™) Waveguide: Provides smoother off-axis response for a wider sweet spot.
• Acoustical Controls: Four-position bass, low-mid, and treble controls allow for precise tailoring of the output to suit various listening environments.
• Neumann Logo Indicator: A two-color and dimmable Neumann logo displays the operational status and activation of the extensive protection system.
• พอร์ตแผงด้านหน้า: Large front panel ports reduce bass compression and facilitate easier mounting in tight spaces.

4. การตั้งค่า

Proper setup of your KH 120 A monitors is crucial for optimal performance. Consider the following guidelines:

• การจัดวาง: Position the monitors as a near-field setup, typically 1 to 2 meters from the listening position, forming an equilateral triangle with the listener. Ensure they are at ear height.
• การเชื่อมต่ออินพุต: Connect your audio source to the balanced XLR input on the rear panel of each monitor. The KH 120 A supports various input formats including XLR, RCA, and AES67.
• การเชื่อมต่อไฟฟ้า: Use the provided mains cables to connect the monitors to a suitable power outlet.
• Acoustical Controls: Utilize the four-position switches on the rear panel to adjust Bass, Low-Mid, and Treble levels. These controls help compensate for room acoustics and speaker placement. Refer to the "Operating" section for detailed adjustment guidelines.
• Input Gain and Output Level: Adjust the wide-range input gain and output level controls to match the signal source and desired listening volume.
• การติดตั้ง: An extensive range of optional mounting hardware is available for versatile installation. Ensure any mounting solution is stable and secure.

The back panel of the KH 120 A monitor, featuring the power switch, power input, XLR input, and various acoustic control switches for bass, low-mid, and treble adjustments.

5. ปฏิบัติการ

Once set up, operating the Neumann KH 120 A is straightforward:

• เปิด/ปิดเครื่อง: Use the power switch located on the rear panel to turn the monitor on or off.
• Neumann Logo: The illuminated Neumann logo on the front indicates the monitor's status. A white light signifies normal operation, while a red light may indicate activation of the protection system (e.g., thermal limiting or peak limiting).
• Acoustical Control Adjustments:
  • เบส: Adjusts low-frequency response (0, -2.5, -5, -7.5 dB). Useful for compensating for room modes or proximity to walls.
  • Low-Mid: Adjusts lower-mid frequency response (0, -1.5, -3, -4.5 dB). Helps in controlling muddiness or clarity in the vocal range.
  • เสียงแหลม: Adjusts high-frequency response (+1, 0, -1, -2 dB). Can be used to fine-tune brightness or reduce harshness.

  Experiment with these settings to achieve the most accurate and balanced sound for your specific listening environment.

• ระดับขาออก: The output level switch (94, 100, 108, 114 dB SPL) allows you to set the maximum sound pressure level (SPL) at 1 meter, providing flexibility for different room sizes and listening preferences.
• อัตราขยายอินพุต: The input gain knob (0 dBu to -15 dBu) fine-tunes the input sensitivity to match the output level of your audio interface or mixer, preventing clipping and ensuring optimal signal-to-noise ratio.

6. การบำรุงรักษา

To ensure the longevity and optimal performance of your Neumann KH 120 A Studio Monitors, follow these maintenance recommendations:

• การทำความสะอาด: Use a soft, dry cloth to clean the cabinet. For stubborn marks, a slightly damp cloth with mild soap can be used, but ensure no liquid enters the speaker grilles or ports. Avoid abrasive cleaners or solvents.
• สิ่งแวดล้อม: Operate the monitors in a stable environment, away from direct sunlight, excessive heat, humidity, or dust. Ensure adequate ventilation around the rear heat sinks.
• การจัดการ: Handle the monitors with care. Avoid dropping them or subjecting them to strong impacts.
• สาย: Periodically check all cables for wear and tear. Replace any damaged cables to prevent signal loss or electrical hazards.

7 การแก้ไขปัญหา

If you encounter issues with your Neumann KH 120 A Studio Monitors, consider the following common troubleshooting steps:

• ไม่มีเสียง:
  • Check power connections and ensure the power switch is on.
  • Verify audio cable connections (XLR) at both the monitor and the audio source.
  • Ensure the input gain and output level controls are not set to minimum.
  • Check the audio source (e.g., audio interface, mixer) for proper output levels and settings.
• เสียงผิดเพี้ยน:
  • Reduce the input gain or output level to prevent clipping. The Neumann logo turning red indicates the protection system is active due to high signal levels.
  • Check the audio source for excessive output levels.
  • Ensure cables are not damaged or improperly connected.
• เสียงฮัมหรือเสียงรบกวน:
  • Ensure all audio connections are balanced (XLR).
  • ตรวจสอบการเกิดกราวด์ลูป ลองต่ออุปกรณ์เครื่องเสียงทั้งหมดเข้ากับปลั๊กพ่วงเดียวกัน
  • Move power cables away from audio signal cables.
• Uneven Sound (Stereo Pair):
  • Verify that the acoustical control settings (Bass, Low-Mid, Treble) are identical on both monitors.
  • Ensure both monitors are positioned symmetrically in your listening space.

If problems persist after attempting these steps, please refer to the "Warranty and Support" section for further assistance.

8. ข้อมูลจำเพาะ

This image illustrates the physical dimensions of the KH 120 A monitor, with measurements for its height (16.5 inches), width (11.1 inches), and depth (14.3 inches).

9. การรับประกันและการสนับสนุน

The Neumann KH 120 A Studio Monitor comes with a Limited Warranty. For specific terms and conditions of your warranty, please refer to the warranty documentation included with your product or visit the official Neumann webเว็บไซต์.

For technical support, service, or any inquiries regarding your Neumann product, please contact Neumann customer support directly. You can typically find contact information on the Neumann website or in the quick-start guide provided with your monitor.

When contacting support, please have your product model (KH 120 A) and serial number ready. The serial number is usually located on the rear panel of the monitor.