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The Jeff Rowland Original preamplifier employs all FET amplification stages operated in class-A mode, ensuring high linearity and low distortion. It features a relay-controlled volume control with 200 discrete steps allowing fine level matching and repeatable settings, with separate level indication for each channel on a front-panel fluorescent display. Balance adjustment is achieved by incrementally increasing one channel's level while decreasing the other, maintaining overall system level within a fraction of a dB. The preamp includes a phono stage divided into two stages: the first with paralleled high-transconductance FETs operating without negative feedback and user-selectable MC or MM gain, and the second stage providing current feedback equalization with precise RIAA curve implementation. The phono stage is direct-coupled with DC servo correction and outputs inverted polarity to tape monitor outputs. Additionally, the preamp offers a memory and recall mode to store and automatically recall specific volume levels for each of the six inputs, facilitating instant A/B comparisons. The unit has a total volume control range of 60 dB, with volume increments varying from approximately 0.25 to 6 dB depending on level. The Consonance preamplifier dimensions are approximately 15 inches wide, 13.75 inches deep, and 2.65 inches high, weighing about 14 lbs. It delivers exceptional transparency, neutrality, and musicality, with a frequency response extending beyond 200 kHz and very low distortion and noise figures.
Analog signal output specifications
Phono stage specifications
Input and output connections
Size, weight, and appearance
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The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Master Line Stage's signal-to-noise is 69 dB against the Original's 77 dB, its mm gain 44 dB against 42 dB, its mc gain 64 dB against 60.2 dB, and its thd 0.009% against 0.040%.
The Orpheus MK3S's signal-to-noise is 84 dB against the Original's 77 dB, its mc gain 62 dB against 60.2 dB, its mm gain 44 dB against 42 dB, and its output voltage 10.0V RMS against 7.5V RMS.
The Orpheus's signal-to-noise is 84 dB against the Original's 77 dB, its mc gain 60 dB against 60.2 dB, its mm gain 40 dB against 42 dB, and its output voltage 10.0V RMS against 7.5V RMS.
The CL1000's signal-to-noise is 100.1 dB against the Original's 77 dB, its thd 0.045% against 0.040%, its mc gain 73 dB against 60.2 dB, and its mm gain 54 dB against 42 dB.
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