Product description

    Jeff Rowland Model 735 Mono Block Amplifier

     Based upon the evolutionary legacy of the 625/725 amplifier series, the 735 amplifier incorporates an amorphous core input transformer and other innovative design principles allowing the listener to fully experience the heart and soul of the musical composition, ensuring a lifetime of musical enjoyment.

    Machined Aluminum 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.

    Ceramic Circuit Boards 

    All audio circuits are implemented on mil-spec, multi-layer, low dielectric constant, Rogers™ ultra-rigid ceramic circuit board substrate for extremely low energy retention and absorption. Large low impedance ground planes areas for extended internal star-grounding.

    Composite Circuit Architecture

    Unique composite circuit architecture incorporating separate Class AB voltage and current gain blocks with an innovative error correction loop, delivering a sensuous grain-free musicality of unparalleled transparency and low level resolution.

    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.

    Power Factor Correction

    Power Factor Correction (PFC) in the power supply reduces AC line harmonic noise pollution and increases AC line power utilization to 99%.

    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.

    Parallel Binding Posts 

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

    Flexible 20 Amp Ac Power 

    20 amp AC power inlet accepts a wide variety of after-market high-performance power cables.

    Front Panel Standby Button 

    Illuminated front panel push-button switches the amplifier into standby mode (<0.3 watt consumption).

    Remote On/Off

    A 1/8” (3.5mm) mini plug connector on rear panel permits amplifier power on/standby switching in remote and home theater applications.

    Improved Amplifier Isolation 

    Proprietary damping material on the bottom of the amplifier chassis completely isolates the amplifier from its supporting structure.


    Output Power

    330 watts @ 8 ohms / 650 watts @ 4 ohms

    Frequency Response

    5 Hz – 90 kHz, – 3 dB

    S/N Ratio

    95 dB, ref. 1.0 watt @ 8 ohm load

    Output Noise

    <55 µv, 20 Hz – 20 kHz, unweighted

    Input Impedance

    40k ohms

    THD + Noise

    <0.001% from 2.0 kHz – 20 kHz, gradually increasing below 2khz due to amorphous core input transformer characteristics

    Damping Factor

    >500, 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


    Balanced (XLR)


    2 pair parallel binding posts

    Power Consumption Idle

    85 watts/VA, power factor corrected at all power levels

    Power Consumption Standby

    0.3 watt

    Amplifier Weight

    54 lbs. ( Each )

    Amplifier Shipping Weight

    64 lbs ( Each )

    Amplifier Dimensions 

    5.75” ( H ) x 15.5” ( W )  x 16.25”  ( D )

    Available in store


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