The Gold Line Polarity Analyzers utilize state of the art signal processing to accurately determine absolute polarity which is unimpaired by passive crossovers or signal waveform distortions produced by the device under test. The APT2 works on tweeters, mid-ranges, woofers, subwoofer speakers and cabinets, equalizers, amplifiers and crossovers. With this handy instrument an entire speaker system can be checked in only seconds. The Polarity Detector (APT) and Pulse Generator (PG) are supplied as separate units.
	U.S. PATENT 5,319,714
	The NEW APT2B offers all the features and convenience of the original APT2 plus balanced outputs and inputs.

SPECIFICATIONS

Inputs - APT2: PG - None APT - ¼" Phone jack - auxiliary microphone input - impedance 20k ohms

Outputs - APT2: PG - ¼" Phone jack - to drive loudspeaker directly - impedance 4 - 16 ohms ......- ¼" Phone jack - to drive amplifier directly - impedance 50 ohms APT - None

Inputs, Balanced - APT2B: PG - None APT - ¼" Phone jack - auxiliary microphone input - impedance 20k ohms ........- 3Pin Female XLR - auxiliary microphone input - impedance 20k ohms

Outputs, Switchable - APT2B: PG - ¼" Phone jack - Unbalanced - to drive loudspeaker directly - impedance 4 - 16 ohms ........- 3Pin Male XLR - Unbalanced - to drive loudspeaker directly - impedance 4 - 16 ohms OR ......- ¼" Phone jack - Balanced - to drive amplifier directly - impedance 50 ohms ........- 3Pin Male XLR - Balanced - to drive amplifier directly - impedance 50 ohms APT - None

APT Microphone: Built-in omnidirectional electret condenser.

Required Acoustic Level At APT: 70dBc to >110dBc.

APT Display: Single LED for positive-going pulse polarity. 300ms ON duration. Single LED for negative-going pulse polarity. 300ms ON duration.

PG Display: Single LED positive-going pulse with 1s repetition rate.

PG Line Pulse Output: Amplitute: APT2 - 0.4V peak typical / APT2B - 0.8V peak typical. Rise time: <100 µs. Fall time: 40ms typical. Duty factor: 0.3% typical. Battery drain: 1.1mA average.

PG Speaker Pulse Output: Amplitute: 6.5V peak (14 watts) to 4 ohm loudspeaker. Rise time: <100 µs. Fall time: 1.5ms typical. Duty factor: 0.15% typical. Battery drain: 3.2mA with 4 ohm loudspeaker.

Power Requirements: PG - 9V battery APT - 9V battery

Size (W x H x D); Weight: PG - 3" x 5½" x 1-3/4"; 7 oz. APT - 3" x 5½" x 1-3/4"; 7 oz.

Case Material: High impact ABS