Jeff Rowland Criterion Preamplifier


On very rare occasions, one person's vision encompassing a life's experience and creativity will merge and come to fruition in a work of art unequalled among peers. Jeff Rowland proudly presents his Criterion Preamplifer.

The Criterion incorporates the most tried and proven concepts trailblazed by JRDG over the 25+ years of successfully developing the finest audio products available: battery power that provides the cleanest possible power source and isolation from the power grid, balanced circuitry, transformer coupling and much more. Additionally new ideas resulting in the further elimination of haze-inducing vibration are included in this no-holds-barred design.

Additional details are forthcoming, but words alone cannot adequately describe the sonic excellence of this unique product. It must be heard to comprehend this outstanding achievement.


Overall Gain
Independently Programmable 0 to 20 dB on each input
Gain Range
99.5 dB, 199 Equal Increments
Gain Resolution
0.5 dB, +/- 0.03 dB Over Entire Range
Frequency Response
10 Hz – 300 kHz, -3 dB @ 8 ohms
Maximum Input Level
13.5 volts (RMS) @ 0 dB Gain
Maximum Output Level
13.5 volts (RMS)
THD + Noise
< .003% @ 2 volt (RMS) Output, 50 Hz – 20 kHz
Signal-to-Noise Ratio
> 100 dB
Common Mode Rejection Ratio
> 90 dB, 20 Hz – 20 kHz
Channel Separation
99.5 dB
Input Impedance
40k ohms Balanced or Unbalanced
Output Impedance
60 ohms Balanced or Unbalanced
4 pair Balanced (XLR), 2 pair Unbalanced (RCA)
2 pair Balanced (XLR), 2 pair Unbalanced (RCA) for Main Out
1 pair Balanced (XLR), 1 pair Unbalanced (RCA) for Record Out
Power Consumption
Min – 15 watts, Max – 50 watts
Depending on Battery Recharge Rate
Power Supply
Universal Voltage Input Power Supply with
Selectable Off-line NiMh Battery Power Supply and Charger
320 x 32 dot Vacuum Fluorescent Display (VFD)
Preamplifier Weight
46 lbs. / 21 kg
Overall Preamplifier Dimensions (H) x (W) x (D)
6.4” x 15.5” x 12.3” (162mm x 394mm x 311mm)






For more information : 

Contact : Dicky Ng 012-3308893

Email :

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