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Jeff Rowland Model 625 Stereo Amplifier
Jeff Rowland Model 625 Stereo Amplifier

Jeff Rowland Model 625 Stereo Amplifier

SKU: Model 625Jeff Rowland
$23,300.00
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Product Description

The 625 Series 2 incorporates many of the same technical features of the 725 amplifiers. Similar to the 725, the 625 S2 signal circuitry is built 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 increased 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 implemented with a higher turns ratio and wound with Cardas high purity copper wire.

Input circuitry includes an additional linear phase 2 pole filter to effectively 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 developed error-correction circuitry has been incorporated 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 delivers a sensuous grain-free musicality of unparalleled transparency and low level resolution that blossoms from a rich velvety silence and blossoms into the pure enjoyment of your listening experience.

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.

Shipping

All orders are processed within 48 hours from date of order.

We offer Free Ground Shipping on all orders regardless of size.  

  • If you would like to receive your order quicker you can request Express shipping during Check-Out in the Comments section.  Additional charges will apply.
  • In-stock items are shipped from our Vancouver warehouse and will reach major Canadian cities in 5-7 business days.
  • Items not in stock will either ship from one of our manufacturer partners' warehouses or in rare cases first must be sent to Vancouver and then to you.  
    • If the expected arrival to you will be more than 7 business days you will be notified by email and at that point you will have the option to proceed or if you cannot wait then order can be cancelled.

Returns Policy 

We will gladly:

  • (a) exchange a product that is not special ordered, or shipped from one of our partner warehouses, for a new product of equal value (product purchased must be unopened)
  • (b) exchange a product if it is defective or damaged for the same product

within 15 days after the product has been delivered to you.

Returns for refund are not accepted.

For an exchange, you must notify us by email at info@hificentre.com. We will acknowledge receipt of your email by reply and assist you in returning the product as identified below. Make sure to send and have your return package post marked within the 15 days after the product has been delivered to you.

Exceptions:

  • Headphones may not be returned or exchanged for any reason, only defective units will be replaced for the same model
  • Items that have been opened may not be returned

Cancellations:

Notwithstanding the foregoing, you may cancel an order if the product is not delivered to the delivery address on your order form within 30 days of the date your order is accepted.

To cancel, you must notify us by email at info@hificentre.com. We will acknowledge receipt of your email and process the cancellation.

Returns Packaging:

Products returning for exchange must be unused and in their sealed, original factory packaging.

Buyer is responsible for return shipping costs.

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