Thermionic Culture Phoenix Master Stereo Compressor

Thermionic Culture

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Product Code: 9999-11717
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The Thermionic Culture Phoenix Master Stereo Compressor, a mastering version of the Phoenix with Elma and Alpha switches, and slightly gentler compression curve. This provides accurate and more controlled settings, and a more subtle kiss compression approach - needed for the lighter hand touch you want in mastering.

The Thermionic Culture Phoenix Master Stereo Compressor is the latest development in the evolution of the classic Phoenix compressor, first introduced in 1998. After requests from mastering engineers the Master Phoenix was introduced in October 2006. This was more recall-able with indented pots and slightly different power supply and metering circuit, in which trimming the meter alters the current through the compression valve so compensating for valve ageing. The compression curve of the mastering Phoenix is slightly gentler than that of the standard one, but it does have a more "positive" effect. This earlier version has 6dB lower gain compared to the standard Phoenix. The Master Phoenix is in use in many studios and mastering suites around the world, and we do know that one of its users, Ray Staff of AIR London Studios won the MPG award for Best Mastering Engineer in 2009.

The new Mastering Plus is a much upgraded version employing precision Elma switches for the Gain and Threshold and Alpha switches for Attack and Release. Omeg indented pots are used for the Output Level for fine control. Side Chain Bass Cut switches, which have become an essential mastering tool have been retained. In stereo mastering, with the link switch in, there are effectively 5 frequency options as the compressor side chain will work at the average of the switch positions. A Standby switch is introduced to prolong valve and component life and this has had an unexpected effect. Some users have found that analogue tape type distortion is created when the unit is operated with Standby on.This was unintentional but some people may find it interesting. Mullard and Siemens NOS valves are used exclusively for lower noise and long life stability. The Gain is now identical to that of the standard Phoenix so that extreme compression effects are possible. Easy adjustment of Meter Zeros, especially important in stereo mastering, is now enabled by front panel access to the trim controls, situated between the 2 meters.

Thermionic Culture Phoenix Master Stereo Compressor Features

  • All valve signal path and side chain, point to point hand wired in England.
  • Subtle control with 'soft knee' compression more compression effects when pushed hard.
  • Stereo link for mix buss compression.
  • Side chain filters to enable compression of all frequencies except bass.
  • Flat frequency response over full audio range and beyond.
  • Very low phase shift and harmonic distortion (unless pushed hard).
  • Push-pull design gives a natural warm sound with high output level.
  • Output trim controls for fine adjustment or lower level operation.
  • Balanced ins and outs with custom made Sowter transformers.
  • Bypass switch on each channel removes all electronics.
  • Special Key Features
    • Elma switches for gain and threshold controls.
    • Alpha switches for attack and release controls.
    • All Mullard and Siemens NOS valves.
    • Easy recall- ability.
    • Zero adjustment on front.
    • Precise calibration.
    • More gain than earlier Master Phoenix.
    • Standby switch to prolong valve life.
    • Distortion effects can be created with standby on.

Thermionic Culture Phoenix Master Stereo Compressor Specifications

  • Max. o/p level (MOL): +19dB into 600Ω, +24dB into 10kΩ
  • Max gain: 30dB
  • THD (at no compression): better than 0.06 % @ 100Hz & 1kHz
  • Noise, IEC weighted: better than 100dB below MOL
  • Input impedance: 15kΩ
  • Frequency response:
  • Attack time: 0.004s to 0.12s
  • Release time: 0.04s to 2.4s
  • Output impedance: 600Ω

Thermionic Culture Phoenix Master Stereo Compressor Includes

  • Phoenix Master Stereo Compressor
  • Power Cable
  • Manual and Warranty Information

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