Jeff Rowland Model 625 S2 Stereo Power Amplifier

₹ 1,875,000.00

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Country of Origin: Usa

The Jeff Rowland Model 625 Series 2 Stereo Power Amplifier is now available on Ooberpad. It incorporates many of the same technical features as the 725 amplifiers. Similar to the 725, the 625 S2 signal circuitry is developed upon a Rogers ceramic circuit board laminate material for lower dielectric absorption and energy storage. The 4-Pole filter capacitors used in the 725 power supply have also been included in the S2, significantly reducing power supply output noise. The maximum output power has been enhanced from 300 to 325 watts per channel at 8 ohms. Precision LED based current sources have been implemented throughout the amplifier circuitry, along with 0.1% thin film SMD resistors for more stable operating points and lower noise. Custom designed Lundahl input transformers are applied with a higher turns ratio and wound with Cardas high purity copper wire.

Input circuitry comprises an additional linear phase 2 pole filter to remarkably attenuate all out-of-band signals from any source, including DSD spurious noise. Cardas gold/Teflon/rhodium XLR input connectors are carried over from the 725. Newly crafted error-correction circuitry has been included around the entire amplifier, making a total of three independent error-correction techniques used to decrease all forms of distortion throughout the entire audio bandwidth. The Model 625 S2 renders a sensuous grain-free musicality of unmatched transparency and low level resolution that blossoms from a rich velvety silence and blossoms into the most pristine enjoyment of your listening experience.


1-year manufacturer's warranty

Key Features:

    • Machined Aluminum Chassis
    • Composite Circuit Architecture
    • High-Current Copper Bus-bars
    • Flexible 20 Amp AC Power
    • Front Panel Standby Button
    • Rear Panel Remote Jack
    • Removable 3-point self-leveling Delron chassis supports

        Benefits of Jeff Rowland Model 625 S2 Stereo Power Amplifier: 

        Machined Aluminim Chassis
        Machined Aluminim Chassis

        Precision-machined chassis with integrated heat-sinks, milled from a solid block of aircraft grade aluminum, provides exceptional thermal heat transfer/dissipation, RFI/EMI shielding, and resonance control.

        Composite Circuit Architecture
        Composite Circuit Architecture

        Unique composite circuit architecture incorporating separate Class AB voltage and current gain blocks with no overall negative feedback, delivers a sensuous grain-free musicality of unparalleled transparency and low level resolution.

        Balanced Topology
        Balanced Topology

        Inherent cancellation effects of balanced topology implemented throughout all power and input/output circuits ensures greatly reduced distortion and noise under dynamic signal conditions.

        High-Current Copper Bus-Bars

        High-current, dual polarity, ultra low impedance copper bus-bars distribute both power supply input current and signal output current, virtually eliminating intra-circuit EMI signal contamination, greatly reducing internal wiring, while increasing circuit board rigidity.

        High Precision Surface Mount Components

        Extensive use of Lead (Pb)-free, low temperature coefficient, active and passive surface-mount components results in significantly smaller loop areas, reduced circuit capacitance and inductance, and introduces less noise than conventional leaded components.

        Transformer-Coupling and Isolation

        Transformer coupled input circuitry provides universal component compatibility and virtually eliminate ground loop noise and RFI/EMI. Transformer coupling ensures identical amplifier overall gain when using unbalanced input adapters.

        High-Efficiency Switch-Mode Power Supply

        Highly efficient, compact, light weight, 1500 watt DC switch-mode power supply provides optimum voltage regulation for all circuits and operating conditions, and allows for quiet operation over a wide range of AC mains power sources.

        Dual-Position Speaker Terminals

        Dual CE approved speaker output terminals, in both horizontal and vertical orientation, require no tools for secure, low resistance connections, and allow for easy bi-wiring applications.

        Where to buy?
        Buy Jeff Rowland Model 625 S2 Stereo Power Amplifier online at the best price in Mumbai, Delhi, Bangalore, Chennai, Kerala, Hyderabad  and all across India. Enjoy expert, prompt and courteous customer service from the Ooberpad team. We will help you choose better and give you all the support you need to take the right buying decision in India.

        Technical Specifications of Jeff Rowland Model 625 S2 Stereo Power Amplifier:

        Brand & Model # Jeff Rowland Model 625 S2 
        Output Power
        325 watts @ 8 ohms / 600 watts @ 4 ohms
        Frequency Response
        10 Hz – 150 kHz, -3 dB
        S/N Ratio 95 dB, ref. 1.0 watt @ 8 ohm load
        Output Noise < 100 µv, A-wtd
        Crosstalk > 91 dB @ 1 kHz, 74 dB @ 20 kHz
        Input Impedance 40k ohms
        THD + Noise
        < 0.001% @ 1 kHz, 8 ohms
        Damping Factor
        > 200, 20 Hz – 20 kHz
        Overall Gain / Bal. or Unbal. 26 dB
        Common Mode Rejection Ratio > 90 dB, 20 Hz – 20 kHz
        Absolute Phase Non-inverting
        Pin 2 Positive
        Inputs 1 pair balanced (XLR)
        Outputs 2 pair parallel binding posts per channel
        Power Consumption Idle 100 watts
        Power Consumption Standby < 0.5 watt
        Amplifier Weight 54 lbs. / 24.5 kg
        Amplifier Dimensions (h/w/d)
        5.75” x 15.5” x 16.25” / 146mm x 394 mm x 413mm


        PN: All Pre-order/On-Order/Special-Color takes minimum 4-6 weeks to arrange from brand. Please speak with Customer Support Representative incase of any queries.

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