Balanced Operation, Remote Control Operation

MOON P-7 Dual-Mono Preamplifier

Balanced Operation

When using an unbalanced interconnect, the audio signal runs through both the center wire and the shield/ground wire. Any noise picked up by this interconnect (ie. nearby magnetic fields such as an AC power cord) will be reproduced by both the preamplifier and amplifier, then heard through the loudspeakers. Conversely, a balanced interconnect has three separate conductors; one for the ground and two for the actual signal. These two signals are identical except that one is 180 degrees out of phase with the other. For example, when one conductor is carrying a signal of +10 Volts, the other will be carrying a signal of –10 Volts. When these two inverted signals on a balanced line are output from the MOON P-7, any noise picked up by the interconnect will be eliminated since a differential circuit amplifies only the difference between these two signals: Noise on a balanced interconnect will be equal on both conductors and therefore not be processed.

Remote Control Operation

The MOON P-7Dual-Mono preamplifier uses the ‘FRM-2’full function, all aluminum remote control (figure 4). It operates on the Philips RC-5 communication protocol and can be used with other MOON components.

The ‘FRM-2’remote uses three AAA batteries (included). To install them, use the supplied Allen key to remove the three screws located on the back plate; insert the batteries in the correct direction and then screw the back plate back into place.

To operate the P-7with this remote control, you must first press the button labeled ‘Preamp’ in the top right corner.

The POWER button switches the P-7between ‘Standby’ and ‘On’ mode.

The INPUT button temporarily assigns the and buttons to perform the same function as the “+” and “-” input buttons located on the controller’s front panel; allowing you to sequentially scroll through each of the preamplifier’s inputs. After five seconds of inactivity, the and buttons will again control channel balance (see below).

The VOL+ and VOL– buttons increase and decrease the volume level. From 30 to 80dB, holding either button down results in 1.0dB volume changes; repeatedly pressing either button very briefly results in 0.1dB volume changes.

The and buttons control channel balance; Pressing the left arrow button causes a decrease in the volume level of the right channel; pressing the right arrow button causes a decrease in the volume level of the left channel. The balance adjustment operates in

1% increments. When the balance is equal for both channels, “	00 ” will appear in the
front panel display. The range for the balance control varies	from “ 100” for left
channel only to “100 ” for right channel only.

The MUTE button, located in the middle of the volume and balance buttons, performs the identical function as the ‘Mute’ button located on the P-7’s front panel.

Figure 3: FRM-2 Remote Control

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Balanced Operation / Remote Control Operation

P-7 specifications

The Simaudio P-7 is an impressive piece of audio equipment that stands out in the realm of high-end preamplifiers. It is celebrated for its meticulous engineering, exceptional sound quality, and extensive capabilities. Designed and manufactured in Canada, the P-7 incorporates Simaudio's commitment to innovation and aesthetic appeal, providing audiophiles with an unparalleled listening experience.

One of the prominent features of the P-7 is its meticulous build quality. It features a robust chassis that not only enhances durability but also minimizes resonance, which could otherwise interfere with sound clarity. Simaudio implemented a dual-mono design in the P-7, ensuring that left and right channels operate independently to produce a perfectly balanced signal. This architectural choice contributes significantly to the unit's outstanding imaging and soundstage.

The P-7 includes a sophisticated circuit design that employs high-quality components throughout. For instance, it utilizes custom-made capacitors and precision resistors to ensure optimal signal integrity. The preamplifier's discrete transistor amplifiers are designed to deliver an incredibly low noise floor, which translates to a purer sound free from unwanted interference.

Another defining characteristic of the P-7 is its versatile connectivity options. It is equipped with multiple inputs, supporting both balanced XLR and unbalanced RCA connections. The ability to switch between formats ensures compatibility with a wide array of audio sources, including digital and analog components. Furthermore, the P-7 includes a comprehensive set of outputs, allowing connections to various power amplifiers and recording devices.

The P-7 also features an intelligent control interface, which includes a user-friendly remote. This allows for effortless adjustments to volume levels, input selection, and other features from a distance, enhancing the overall listening experience. Additionally, it is designed to integrate seamlessly with other components within Simaudio's Moon series, maintaining an aesthetic congruence while optimizing performance.

In terms of performance, the Simaudio P-7 is praised for its transparent sound reproduction and tonal accuracy across a broad frequency spectrum. It is particularly renowned for retaining the nuances and dynamics in recordings, producing an immersive audio experience that captivates listeners. The unit's exceptional resolution and detail retrieval make it a favorite among audiophiles looking for fidelity that does not compromise on emotional engagement.

Overall, the Simaudio P-7 preamplifier combines innovative technology with exquisite craftsmanship, delivering a compelling solution for those seeking high-performance audio. Its robust feature set, outstanding sound quality, and user-friendly design make it a prominent choice for anyone serious about their audio experience.