Crate Amplifiers LS3-231, LS1-131, LS2-215 manual Upper-Mid Range 4kHz-8kHz, High Range 8kHz-20kHz

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

Upper-Mid Range: (4kHz-8kHz)

This region is the “presence” range which can determine whether the mix or instrument is “harsh” and “piercing” or “distant” and “muffled”. This range will also help voices and other instruments cut through a mix when boosted. When high frequency “feedback” occurs, this region is one of the most critical in eliminating it.

High Range: (8kHz-20kHz)

High end, as it is usually perceived, is actually below 12kHz. However, the 10kHz to 16kHz range is used to enhance vocals and wind instruments by bringing out “breath” sounds that give them distinction and clarity. Cymbals on drums can also be made to appear more cutting and clear in this region. The range of 16kHz to 20kHz can be used to compensate for off-axis high frequency deficiencies of horns and tweeters.

APPLICATIONS:

SOME METHODS OF CONNECTION:

There are several different ways to connect an equalizer to a sound system. The equalizer may be connected directly in-line with the signal source (see figure 6 below), to the “insert” jack of a mixer/amplifier’s channel section (figure 7, below), or in-line between a mixer and an amplifier (figure 8, following page). Your dealer can assist you in choosing the connection which is best suited for your particular needs.

Figure 6: In-Line with Signal Source:

SOURCE

MIXER (OR AMPLIFIER)

 

EQUALIZER

Source connects to

BALANCED OUTPUT

BALANCED INPUT

jack of equalizer

jack of equalizer

connects to INPUT

 

jack of mixer or

 

amplifier

Figure 7: Connect to an Insert Jack:

"Send" side of the signal cable harness connects to the eq's BALANCED INPUT jack IN

 

"Return" side of the signal cable

EQUALIZER

harness connects to the eq's

BALANCED OUTPUT jack

OUT

"Insert" cable harness,

TIP SLEEVE

connected to the

mixer/amplifier's MIXER (OR AMPLIFIER)

"INSERT" CABLE DETAIL:

SLEEVE

TIP

INSERT jack

TIP RING

TIP

(see detail to the right)

SLEEVE

RING SLEEVE

Typical "Insert" cable harness assembly. Stereo end of harness plugs into INSERT jack. "Tip" of stereo end carries signal to one of two mono plugs,

TIP SLEEVE

"ring" carries signal to other plug.

SLEEVE

TIP

"Send" side of INSERT jack goes to eq's IN jack, "Return" side goes to eq's OUT jack. This may vary from mixer to mixer; some experimentation may be required to achieve the proper results.

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Contents LS1-131 LS2-215 LS3-231 User’s GuideTable of Contents An Introduction to Equalizers Vs. Ringing Low Cut Control LS1-131/LS3-231 Front and Rear Panels Power Use this switch to turn the unit on and offLS2-215 Front and Rear Panels Bass Range 20Hz-125Hz Using an EqualizerMid-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 Creative or Enhancement Equalization Feedback ControlLS1-131/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.