Description:
The LW-5991 Automatic Polarity Tester is an essential, high-speed instrument for any audio component production line or quality control lab. It utilizes a sophisticated pulse measurement technique to instantly (0.2 seconds) and accurately determine the positive ("+") and negative ("-") polarity of speakers, headphones, and dynamic receivers (earpieces), regardless of their type, size, construction material, or impedance.
Clear LED indicators and a configurable audible buzzer provide unambiguous pass/fail results, streamlining workflow. Beyond polarity, it also performs a basic sound quality assessment during testing.
Featuring three selectable output levels (High/Medium/Low), it optimally tests diverse drivers like general speakers, dome tweeters, and sensitive Mylar speakers/receivers. Its compact, robust design and fast, reliable operation make it ideal for demanding industrial environments.
Ensure correct speaker phasing and basic functionality effortlessly with the LW-5991!
Specifications:
Model: LW-5991
Measurement Method: Pulse Method
Pulse Width: 0.4ms ± 0.2ms
Pulse Amplitude (Output): > 10Vp-p (High setting)
Detection Speed: 0.2 seconds
Output Level Settings:
High: General audio speakers
Medium: Dome tweeters
Low: Mylar (Polyester film) speakers or dynamic receivers
Sensing Microphone: Condenser Type
Alarm Buzzer: Selectable for "+" or "-" indication
Testing Sensitivity: Effective distance ≥ 25cm (from speaker under test)
Power Supply: AC 220V ±10% 50Hz
Dimensions (L x W x H): 230 x 205 x 80 mm
Weight: Approx. 3 kg
Features:
Universal Compatibility: Tests "+" and "-" polarity of ANY type, size, material, or impedance speaker, headphone, or dynamic receiver (earpiece).
Fully Automatic & Fast: LED or audible alarm indicates polarity instantly (0.2s detection speed). Perfect for production lines.
Pulse Measurement: Advanced pulse method ensures accurate, error-free judgment.
Sound Quality Check: Simultaneously detects basic sound quality (pure tone) during polarity testing.
Adjustable Output: Three levels (High/Medium/Low) for optimal testing of different drivers (e.g., High for speakers, Low for Mylar tweeters/receivers, Medium for dome tweeters).
Configurable Alarm: Audible buzzer can be set to sound for "+" OR "-" polarity.
Easy Operation: Simple to use with clear indication.
Robust Design: Sleek, compact, and durable (3kg).
