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Phoenix Engineering RoadRunner Tachometer - Falcon/Eagle Power Supplies and VPI SDS Motor Controller

Many turntables today include an electronic speed controller for the motor that drives the platter that makes the records go round and round. The purpose of these controllers is to make sure that the motor sees a very constant signal to maintain a very constant speed. The ear is more sensitive to variations in speed than to small inaccuracies in the exact frequency.

Emerald Physics 4.7 Loudspeakers

The new Emerald Physics EP4.7 loudspeakers will rock your world. Although open baffle technology has been in the public domain for decades, only recently have commercial products become available that use this concept effectively. Open baffle speakers have no enclosure, only a mounting board to which the drivers are attached.

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Spread Spectrum Technologies Thoebe II Preamplifier & Son of Ampzilla II Amplifier

Son of Ampzilla II

Spread Spectrum Technologies was founded by James Bongiorno, the legendary and colorful audio pioneer and engineer who was also directly involved with key designs at Marantz, SAE, SUMO Electric, and Great American Sounds (GAS). Several years ago, Mr.

RCM Sensor 2 Phono Preamplifier

The new RCM Sensor 2 phono preamplifier follows the successful RCM Sensor Prelude IC that was reviewed here on 10 Audio in December, 2012. I did not have the older version on hand for direct comparison, but I will tell you this without qualification or reservation: The RCM Sensor 2 sounds wonderful.

AMG Teatro Phono Cartridge & Musical Surroundings Nova II Phono Preamplifier

AMG has received a mountain of positive press over the past couple of years with their high performance Viella 12, AKA ‘V12’, turntable. This turntable has been included in display systems by a significant number of exhibitors at various audio shows in lieu of brands that might be more familiar to the audio public.

Ayre K-5xe MP Preamplifier

The Ayre K-5xe MP line level preamplifier has been in production for about five years and is mostly unchanged since its introduction. These long production lifetimes are standard for Ayre Acoustics which is located in Boulder, Colorado, literally at the foot of the Rocky Mountains. Ayre has consistently produced fine sounding audio components which appear regularly on recommended lists.

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