OPERATION

A variety of speaker cables are now available whose manufacturers claim better performance over standard heavy gauge wire. We have verified this in many cases, and the improvements available are often more noticeable than the differences between wires of different gauge. The effects of cables may be masked if the equipment is not of the highest quality.

We also recommend, if possible, that short runs of speaker cable connect the power amplifier(s) and speakers and that high-quality long interconnect cables be used to connect the preamplifier and power amplifier. This results in the power amplifiers being close to the speakers, which may be practically or cosmetically difficult, but if the length of the speaker cables can be reduced to a few meters, sonic advantages may be obtained.

Connections are made at the Signal Input section on the rear electronics panel of the CLS IIz. Use spade connectors for optimum contact and ease of installation. Make certain that all of your connections are tight.

Be consistent when connecting the speaker cables to the Signal Input terminals. Take care to assign the same color cable lead to the (+) terminal on both the left and right channel speakers. If bass is nonexistent and you cannot discern a tight, coherent image, you may need to reverse the (+) and (–) leads on one speaker to bring the system into proper polarity.

WARNING! Turn your amplifier off before making or breaking any signal connections!

Break-In

When you first begin to play your CLS IIz speakers allow 90 hours of break-in at 90 dB (moderate listening levels) before any critical listening. The CLS will benefit from the initial break in process like any conventional driver. The membrane will flex and become more supple resulting in a richer, more detailed and accurate sound quality compared to the initial, out of the box, performance. Typically the bulk of the break-in will occur in the first 90 hours but subtle improvements will continue for quite some time.

High-Frequency Softening Switch

On the rear panel of the CLS IIz electronics module, near the signal input, is a two position High Frequency Softening switch that allows you to select the type of high frequency response that you desire.

The ‘Flat’ position is considered the normal setting for most rooms. However, due to different listening environ- ments, different electronics characteristics and personal preferences, you may prefer the ‘Soft’ Position. We sug- gest that you listen to the speaker using both switch positions and decide which position is correct for you par- ticular situation.

Operation 5

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MartinLogan CLS IIz user manual Operation, Break-In, High-Frequency Softening Switch
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CLS IIz specifications

The MartinLogan CLS IIz is a sophisticated hybrid electrostatic loudspeaker that exemplifies the brand's commitment to innovation and exceptional audio performance. This model is a continuation of the legendary CLS design, which has garnered a loyal following among audiophiles and music enthusiasts alike.

One of the standout features of the CLS IIz is its electrostatic transducer design. Unlike conventional dynamic speakers that rely on moving coils and cones, electrostatic speakers use a thin, electrically charged diaphragm sandwiched between two stators. This design allows the CLS IIz to produce sound with extraordinary clarity, speed, and precision, making it particularly well-suited for accurately reproducing the nuances of vocal performances and acoustic instrumentation.

The CLS IIz also integrates a new, more advanced version of the brand's Curvilinear Line Source technology. This innovation provides a wider and more consistent sound dispersion pattern, resulting in an expansive soundstage that immerses listeners in their favorite recordings. The speaker’s tall, slender design further enhances this effect, allowing for an impressive imaging capability that places sounds precisely within the listening environment.

Another key characteristic of the CLS IIz is its frequency response. The speaker is capable of reproducing frequencies from an astonishingly low 38 Hz to a remarkable 25 kHz. This wide frequency range ensures that music and audio content are delivered with great depth and richness, fully capturing the lower bass notes while maintaining the sparkling clarity of high-frequency sounds.

In terms of build quality, the CLS IIz features a sturdy yet elegant cabinet that minimizes resonance and vibration, allowing for pure audio reproduction. The speaker's sleek aesthetic is complemented by high-quality finishes, ensuring that it looks as good as it sounds, making it an attractive addition to any audio setup.

Additionally, the CLS IIz boasts versatility in its setup, allowing for positioning flexibility that accommodates various room sizes and acoustic conditions. This ensures that enthusiasts can achieve optimal sound quality regardless of their environment.

In summary, the MartinLogan CLS IIz is a marvel of modern audio engineering that combines cutting-edge technologies with a commitment to high fidelity sound. With its electrostatic design, advanced dispersion capabilities, wide frequency response, and elegant build, the CLS IIz stands as a testament to MartinLogan's dedication to providing an unparalleled listening experience.
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