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Home > Resources > Our Reviews > Rowland Checkout | My Account | Help

Reviews

Jeff Rowland and Design Group
Solid State Electronics

        For over 20 years, Jeff Rowland Design Group has produced some of  the most widely acclaimed audio products in the world. Their outstanding performance, high reliability and the flawless, jewel-like finish have made them favorites of listeners everywhere.

        Jeff Rowland Design Group's unique stature in the world of audio is due, in part, to their unique approach to the business of audio. No Jeff Rowland Product is the result of "design by committee." Each bears the unmistakable insight of a single man, a designer who brings to his wholly-owned company an extensive background in product development that has bred an unrivaled level of success.


Concerto Integrated Amplifier - Jeff Rowland's integrated amplifiers are legendary. They're the most affordable way to experience Rowland quality and have consistently been top sellers in the line. Understandably so, since these designs offer the listener performance levels tantalizingly close to the Rowland separates for a fraction of the cost. They are compact, convenient, practical and wonderfully musical.

Specifications:
Output Power: Continuous RMS @ 8 ohms - 250 watts @ 4 ohms - 500 watts
CCIF Intermodulation Distortion: 19/20kHz <.002%
Frequency Response:  5 Hz - 70 kHz, -3 dB @ 8 ohms
Damping Factor: 1000
Peak Output Current: >35 Amps
Inputs: 2 x Pair Balanced XLR, 1 x Pair Balanced Unity Gain (Bypass), 3 x Pair unbalanced RCA
Dynamic Range: 117 dBA
Outputs: 2 x Pair Balanced Line Level, 1 Pair CE Approved Binding Posts
Power Consumption:
Idle - 22 watts, Maximum - 1000 watts
Input Impedance Range: 2 ohms to 16 ohms
Weight: 26 lbs./12.1 kg
Dimensions:3.2” x 17.3” x 13.1"


Concerto Preamplifier - Jeff Rowland preamplifiers, and the Concerto in particular, are some of the quietest designs on the market. Music emanates from a totally black background. With a lack of background haze, fine details and subtle musical cues are reproduced with an amazing clarity.  Hear a Rowland preamp and you'll discover newfound information in almost every record.

Specifications:
Overall Gain : 20 dB
Input Impedance: 40K Ohms Balanced or Unbalanced
Gain Resolution: 0.5 dB, +/-0.03 dB Over Entire Range
Channel Separation: >90 dB, 20 Hz to 20 kHz
Frequency Response: 10 Hz - 280 kHz, -3 dB
Inputs: 2 x Pair Balanced XLR, 1 x Pair Balanced Unity Gain (Bypass), 3 x Pair Unbalanced RCA
Maximum Input Level: 15 volts RMS at 0 dB Gain
Outputs: 2 x Pair Balanced Line Level
Maximum Output Level: 13.5 volts RMS
Power Consumption: 7 Watts
Output Noise Level: 43 Microvolts, Unweighted, 20 Hz to 20 kHz Bandwidth, 0 dB Gain
Weight: 21 lbs./9.8 kg
CCIF Intermodulation Distortion: 19/20kHz <.002%
Dimensions: 3.2” x 17.3” x 12.25”


Amplifier Technology

The new breed of Rowland amplifiers offer an innovative solution to one of the most stubborn conflicts in audio design: to build an amplifier with the power and presence to recreate all of the subtlety of music without the troubling by-products of conventional design such as excessive power consumption, massive size, questionable reliability and objectionable heat. Using the patented ICEPOWER® power conversion technology, the Rowland amplifiers solves each of these dilemmas. Every model combines incredible power with cool, quiet efficiency never before realized in the art of amplification.


Model 201Mono Power Amplifiers - The Rowland 201 amplifiers quickly became the biggest selling Rowland product. Over 500 were sold in the first few months after release. It's easy to see why, as the 201's offer outstanding performance in an incredibly functional package.  

Specifications:
Output Power: Continuous RMS @ 8 ohms - 250 watts @ 4 ohms - 500 watts
Input Impedance: 40k Ohms
Frequency Response: 5 Hz - 70kHz, 3dB
Peak Output Current > 35 amps
Absolute Phase: Non-inverting, Pin 2 Positive
Dynamic Range: 117 dba
Inputs: 1 x Balanced XLR (Unbalanced operation requires an optional XLR to RCA adapter)
Load Impedance Range: 2 ohms - 16 ohms
Outputs: 1 Pair CE-Approved Binding Posts
Power Consumption: Idle - 9 watts, Maximum - 650 watts
Amplifier Weight: 13 lbs/6 kg.
Damping Factor @ 1 kHz: 1000
Amplifier Dimensions: 2.6" x 8.4" x 11.5"
Overall Gain: Selectable Internal Jumper, 26 or 32 dB

Model 501Mono Power Amplifiers -  Huge power, small size. The 501 amplifiers are remarkable for their power, performance and miniscule size. The amps will drive anything. But even if you don't have a power hungry speaker, the massive power of the 501 will give any speaker an iron fisted control and a sense of ease and effortlessness that is addictive.

Specifications:
Output Power: Continuous RMS @ 8 ohms - 500 watts @ 4 ohms - 1000 watts
Input Impedance: 40k Ohms
Frequency Response: 5 Hz - 45kHz, 3dB
Peak Output Current > 45 amps
Absolute Phase: Non-inverting, Pin 2 Positive
Dynamic Range: 120 dba
Inputs: 1 x Balanced XLR (Unbalanced operation requires an optional XLR to RCA adapter)
Load Impedance Range: 2 ohms - 16 ohms
Outputs: 1 Pair CE-Approved Binding Posts
Power Consumption: Idle - 15 watts, Maximum - 1300 watts
Damping Factor @ 1 kHz: 1000
Amplifier Weight: 17.0 lbs/7.8 kg.
Overall Gain: Selectable Internal Jumper, 26 or 32 dB
Amplifier Dimensions: 2.85" x 8.4" x 13.0"

 

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