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Phasemation CM-1500 — Preamplifier with “Hybrid Passive Attenuator”

14.02.2025 05:28 | ~1 minute read

Japanese company Phasemation has released the hybrid preamplifier Phasemation CM-1500. The device is equipped with a patented “Hybrid Passive Attenuator” volume control and offers high input impedance and low output impedance – which guarantees perfect matching with other components of the signal path.

Phasemation CM-1500 is equipped only with resistive and transformer type attenuators, which ensures the purity and expressiveness of the sound. The transformer uses the proprietary ultra-thin 0.1mm super malloy material – it is also used in the company's top devices. The author's circuit technology is used, in which a balanced attenuator transformer with two attenuator windings for the hot and cold sides of the balanced connection coiled onto a single transformer – this approach increases detail. And three-step gain switching (-10, 0, +6 dB) makes any volume setting to be possible.

Phasemation CM-1500
Phasemation CM-1500. Image source - (c) Phasemation

Speaking of commutation capabilities, the Phasemation CM-1500 has three RCA inputs and two XLR' outputs are single-ended and balanced. The case is made of copper-plated steel sheet, and the front panel is made of aluminum. The new preamp is priced at 7,500 euros.

Specifications

This product is in the Hi-Fi and High End Electronics and Acoustics database

Preamplifiers — Phasemation CM-1500

  • Model name

    CM-1500

  • Analog inputs (balanced)

    2

  • Analog inputs (single-ended)

    3

  • Analog outputs (balanced)

    2

  • Analog outputs (single-ended)

    2

  • Gain (dBu)

    6

  • Input sensitivity (mV)

    N/A

  • Output voltage (V)

    N/A

  • Input impedance (balanced) (Ω)

    47000

  • Input impedance (single-ended) (Ω)

    47000

  • Output impedance (balanced) (Ω)

    250

  • Output impedance (single-ended) (Ω)

    250

  • Maximum output level (balanced) (dBu)

    N/A

  • Maximum output level (single-ended) (dBu)

    N/A

  • Volume control range (dBu)

    N/A

  • Frequency response low +/- 3dB (Hz)

    10

  • Frequency response high +/- 3dB (Hz)

    100000

  • Signal to Noise Ratio (SNR, unweighted) (dB)

    N/A

  • Total Harmonic Distortion + Noise (THD+N) (%)

    N/A

  • Dimensions (mm)

    430 × 93 × 362

  • Weight (kg)

    8

  • Official link

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