ACOUSTIC REVIVE RR-888

Pre owned. In good condition. Shows some signs of wear. Includes external power supply, manual and original packaging.

The Acoustic Revive RR-888 is an ultra-low-frequency pulse generator designed to artificially reproduce the 7.83 Hz frequency associated with the Schumann Resonance. The model is an evolution of the RR-777 and introduces greater accuracy in waveform generation together with a further optimized low-noise circuit. According to the operating principle stated by the manufacturer, the device acts on the listening environment without being directly connected to the audio equipment.

The Schumann Resonance is a natural electromagnetic phenomenon that occurs in the cavity between the Earth's surface and the ionosphere. Its fundamental mode has a frequency of approximately 7.83 Hz. The RR-888 artificially reproduces this frequency within the environment, with the stated aim of reducing electromagnetic interference and standing waves in the listening room.

In an audio system, the device is designed to contribute to the definition of the sound field, with greater perceived depth and width of the soundstage and clearer separation between sound sources. Listening impressions reported in reviews of the model describe a more expansive sound field, with images that appear closer, deeper and wider, together with greater presence from voices and instruments. The effect is also described in terms of increased clarity and intelligibility of detail, particularly with well-recorded material.

The RR-888 is also used in professional environments, including recording studios, mixing and mastering rooms, as well as during live performances and in educational and concert settings. Its application is therefore not limited to hi-fi systems, but is intended as an intervention in the environment in which audio equipment and musical instruments are used.

The device can also be used with video systems. Sources relating to the model report improved focus and image definition with CRT, DLP and LCD projectors, suggesting the use of the RR-888 as a final adjustment step in a video projection system. A review of the model also reports increased color saturation compared with the RR-777, particularly with high-resolution broadcasts.

The RR-888 has a compact and lightweight enclosure and should not be placed in direct contact with other equipment. It is connected using the supplied power adapter, which is plugged into a wall outlet, while the generator can be positioned freely within the room. The manufacturer recommends an installation height of at least 1.5 meters above the floor, indicating this as a necessary condition for achieving the intended operation. Its position can subsequently be adjusted to find the most suitable location for the characteristics of the room.

Standard power is supplied via an external 12 V adapter. Available tests also report the possibility of using a linear power supply instead of the supplied switching power adapter, with a further increase in the perceived effects during listening.

Technical Specifications:

• Frequency: 7.83 Hz (Schumann Resonance)
• Power supply: AC adapter included; 100–240 V input
• Effective range: several meters
• Dimensions (W x D x H): 140 x 170 x 50 mm