Jeff Rowland - 625 stereo power amp

Jeff Rowland - 625 stereo power amp
Jeff Rowland - 625 stereo power amp Jeff Rowland - 625 stereo power amp

MODEL 625 FEATURES 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. 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 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. 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. 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 (<1 watt consumption). REAR PANEL REMOTE JACK 12V 3.5mm jack on rear panel permits amplifier power on/standby switching in remote and home theater applications. SELF-LEVELING SUPPORTS Removable 3-point self-leveling Delron chassis supports provide high frequency mechanical noise isolation. MODEL 625 SPECIFICATIONS Output Power 300 watts @ 8 ohms / 550 watts @ 4 ohms Frequency Response 5 Hz – 350 kHz S/N Ratio 95 dB, ref. 1.0 watt @ 8 ohm load Output Noise <55 µv, 20 Hz – 20 kHz, unweighted Crosstalk >91 dB @ 1 kHz, 74 dB @ 20 kHz Input Impedance 10k ohms THD + Noise 0.005% @ 1 kHz, 8 ohms Damping Factor >200, 20 Hz - 20 kHz Overall Gain / Bal. or Unbal. 27 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 1 watt Amplifier Weight 54 lbs. / 24.5 kg Amplifier Shipping Weight 64 lbs. / 29 kg Amplifier Dimensions (h/w/d) 5.75” x 15.5” x 16.25” / 146mm x 394 mm x 413mm



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