M2TECH Marley User Manual download pdf (Page 19)

marley

DUAL-DRIVE CLASS-A HEADPHONE AMPLIFIER / PREAMP

REVISION 1.0 – NOVEMBER 2013

M2Tech

www.m2tech.biz

6.1. Volume Setting

Volume setting is performed by encoder knob rotation (Figure 1,3). Depending on the

output configuration, it is possible to set one or two volumes.

When the MARLEY is configured in balanced mode, the two stereo amplifiers which are

used in this mode are bridged and make for a single balanced amplifier. This is why

only one balanced output is present and why only one volume control can be set

when using the balanced headphone connection (Figure 4).

When the MARLEY is configured in dual single-ended mode, each amplifier drives one

jack output. Each amplifier has its own dedicated volume control, it is therefore

possible to set the listening level of each amplifier independently. Two volumes are

thus shown: “VOLA”, related to output “A,” and “VOLB”, related to output “B”. The “>”

sign indicates which volume can be set. As shown in Figure 5, output “A” volume can

be set by rotating the encoder knob.

To set volume for output “B” it is necessary to push the encoder knob once, so that

the “>” moves to the front of “VOLB” (Figure 6).

VOLA:-40DB

IN:1 >VOLB:-40DB

Figure 6

NOTE: After setting output “B” volume, the button to the left of the front panel

may be pushed to restore equipment’s “idle” status as in Figure 4. As an

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M2TECH Marley User Manual Page 19