MartinLogan CLS IIz user manual Operation, Break-In, High-FrequencySoftening Switch

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