Phono Stage

The Thesis φ (phi) is a no-compromise phono preamplifier for all vinyl connoisseurs using a top-class turntable. Just like the Α or &PI ; preamps, it is also fed by the Thesis π twin PSU. By using two independent - MM (moving magnet) and MC (moving coil) - amplifier circuits, it is possible to use two record players connected simultaneously. Cartridge matching is highly customisable for gain and impedance on the rear panel of the unit by jumpers. Noise characteristics, dynamic range, headroom and frequency response of the Thesis φ are second to none.

Technology

It is far from us to lose you in technical terms. It is not our aim to teach you our profession or to provide you with numbers that are merely different from other devices. Electronic specifications and "correctness" are just one aspect and not enough to create perfect music reproduction alone.

Even so we ought to enlighten you about some of the specialties that make Heed products distinctive and stand out from the crowd. Naturally it is impossible to make a musical impression by words alone. Should you have the chance to listen to our creations then you can become acquainted with the relationships between the technical and sonic features of our products by studying the following chapters.

Features:

• Totally separated MM and MC stage (simultaneous work)
• Adjustable MC gain and impedance
• Discrete bipolar transistor architecture
• Exceptional noise figure

Specifications:

• Inputs: 1x MM / 1x MC
• Outputs: 1x MM 50 Ω / 1x MM 600 Ω / 1x MC 50 Ω / 1x MC 600 Ω
• Gain (MC): 44/50/56/62/68/74 dB
• Gain (MM): 33/48 dB
• Input impedance (MC): 100/220/470/1000 Ω
• Input impedance (MM): 47 kΩ / 150 pF
• Noise floor: -90 dBV (MC) / -84 dBV (MM)
• Power supply options: Thesis Pi
• Dimensions (W x H x D): 9.5 x 7.5 x 22 cm