Crate Amplifiers manual LS1-131/LS2-215/LS3-231 Constant Q Graphic Equalizers

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LS1-131/LS2-215/LS3-231Constant Q Graphic Equalizers

 

 

 

 

 

Technical Specifications

 

 

 

 

 

 

 

 

Filters

LS1-131: 1x31 Constant Q Multiple-feedback 1/3 octave ISO spacing from 20Hz to 20kHz

 

 

 

LS2-215: 2x15 Constant Q Multiple-feedback 1/3 octave ISO spacing from 20Hz to 20kHz

 

 

 

LS3-231: 2x31 Constant Q Multiple-feedback 1/3 octave ISO spacing from 25Hz to 16kHz

 

 

 

 

 

Center Frequencies, Hz (±3%)

LS1-131/LS2-231: 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500,

 

 

 

630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, 20k

 

 

 

LS2-215: 25, 40, 63, 100, 160, 250, 400, 630, 1k, 1.6k, 2.5k, 4k, 6.3k, 10k, 16k

 

 

 

 

 

Control Range

±6dB or ±12dB, switchable

 

 

 

 

 

Frequency Response

20Hz-20kHz ±0.5dB (flat settings)

 

 

 

 

 

Total Harmonic Distortion

Less than 0.01% (20Hz-40kHz +10dBu)

 

 

 

 

 

Signal to Noise Ratio

>94dB (20kHz noise bandwidth)

 

 

 

 

 

Gain (flat settings)

LS1-131/LS2-231: ±12dB

 

 

 

LS3-231: -to +12dB

 

 

 

 

 

Maximum Input Level

+22dBm (Level control at center position)

 

 

 

 

 

Common Mode Rejection Ratio

50:1

 

 

 

 

 

 

Channel Separation

50dB (1kHz)

 

 

 

 

 

Low Cut Filter

10Hz-25Hz, 12dB/octave

 

 

 

 

 

High Cut Filter

3kHz-40kHz, 12dB/octave

 

 

 

 

 

Input Impedance

10k ohms

 

 

 

 

 

Output Impedance

2.2k ohms

 

 

 

 

 

Output Impedance

600 ohms

 

 

 

 

 

Bypass switch

“Hardwire” Input to Output

 

 

 

 

 

Power Requirements

95-130VAC, 50/60Hz

 

 

 

190-250VAC, 50Hz

 

 

 

 

 

Input AC Power

12W

 

 

 

 

 

Size (HxWxD)

LS1-131/LS2-215: 1.75” (4.5cm) x 19” (48.3cm) x 8.5” (21.6cm)

 

 

 

LS3-231: 3.50” (8.9 cm) x 19” (48.3cm) x 8.5” (21.6cm)

 

 

 

 

 

Weight

LS1-131/LS2-215: 4.5 lbs (2.5kg)

 

 

 

LS3-231: 9 lbs (4.1kg)

 

 

 

 

 

 

Due to ongoing product development and improvement, the specifications

contained herein are subject to change without notice.

www.crateamps.com

©1999 SLM Electronics, Inc. • A Division of St. Louis Music, Inc.

1400 Ferguson Avenue • St. Louis, MO 63133

47-056-01 • 05/99

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Contents User’s Guide LS1-131 LS2-215 LS3-231Table of Contents An Introduction to Equalizers Vs. Ringing Low Cut Control Power Use this switch to turn the unit on and off LS1-131/LS3-231 Front and Rear PanelsLS2-215 Front and Rear Panels Using an Equalizer Bass Range 20Hz-125HzMid-Bass Range 125Hz-250Hz Low-Mid Range 125Hz-250HzUpper-Mid Range 4kHz-8kHz High Range 8kHz-20kHzSome Methods of Connection Some Methods of Connection Room EqualizationFLETCHER-MUNSON Equal Loudness Contours Feedback Control Creative or Enhancement EqualizationLS1-131/LS2-215/LS3-231 Constant Q Graphic Equalizers

LS2-215, LS1-131, LS3-231 specifications

Crate Amplifiers has long been a name synonymous with quality sound and innovative technology, and their latest offerings, the LS1-131, LS3-231, and LS2-215, showcase this legacy of excellence. These amplifiers are designed for musicians and sound engineers who demand performance and reliability.

The LS1-131 is a compact yet powerful amplifier that delivers an impressive 100 watts of clean power. It features a versatile 3-channel design, allowing for a wide range of tonal options. The built-in digital effects processor includes reverb, delay, and chorus, enabling users to enhance their sound effortlessly. The LS1-131 is equipped with a 10-inch speaker, which provides a rich, full-bodied tone, making it ideal for both practice and live performances. Additionally, its lightweight design makes it easy to transport, catering to musicians on the go.

Moving up the line, the LS2-215 takes things a step further with a two-channel setup that boasts 200 watts of power. This amplifier is perfect for more demanding performance environments. The LS2-215 features a robust 15-inch speaker that offers deep bass response, making it suitable for genres that require low-end clarity. With its built-in EQ and multiple effects options, users can customize their sound further to suit their style. The durable construction ensures that this amp can withstand the rigors of touring, while the integrated handle allows for easy setup and transport.

At the top of the range, the LS3-231 offers an unrivaled combination of power and versatility with 300 watts of output. This amplifier features a sophisticated 4-channel design, providing musicians with an extensive array of sound-sculpting capabilities. The LS3-231 includes advanced connectivity options, including Bluetooth streaming, which allows for seamless integration with mobile devices for practice or performance. Its dual 12-inch speakers deliver incredible clarity and punch, making it a popular choice for professionals in larger venues.

All three models incorporate Crate's proprietary technology, such as thermal overload protection and robust signal processing, ensuring reliability in demanding situations. The user-friendly interface across the LS series makes it easy to adjust settings on the fly, allowing musicians to focus on their performance rather than their equipment. Whether you're a beginner or a seasoned pro, the Crate LS1-131, LS3-231, and LS2-215 amplifiers provide exceptional sound quality, flexibility, and durability to meet the needs of any performer.