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There were 41 articles found in this category:

  1. questionWhy Model 301 incorporates the ICEpower 1000 ASP power conversion module?
    ICEpower 1000 ASP modules are fundamental engineering building blocks found inside a number of class D power amplifiers of all levels of sophistication and complexity. They yield extremely fast, responsive, extended, powerful, and highly controlled amplification, with very little heat dissipatio ...
  2. questionWhat is the pin configuration of the XLR input connectors on the Model 301 reference monoblock power amplifier?
    Absolute phase non inverting, pin 3 positive.
  3. questionWhat are the differences between the original Model 301 amplifier, and current production Model 301 units?
    - Different front end power supplies *Original version utilizes a isolation power transformer followed by two 700W power factor correction (PFC) modules, followed by two 600W Vicor DC-DC converters. * New versions eliminates the transformer and utilizes a single universal A ...
  4. questionIs my Model 301 current production, or is it an original version unit?
    * Original version units of the Model 301 have serial numbers ranging from MA0002 through MA0071. These units were manufactured from March 2003 through October 2005 * New version units of the Model 301 have serial numbers starting from MA0072 and higher. These units were manufactured from ...
  5. questionCan the original Model 301 amplifier be upgraded to current production status?
    No, older Model 301s, having serial numbers between MA0002 through MA0071, manufactured between March 2003 and October 2005, cannot be upgraded to current production versions. * Original version of the Model 301, having serial numbers: MA0002 through MA0071 - Manufactured March 2003 thro ...
  6. questionWhat are the salient technical features of the Model 301 reference monoblock power amplifier?
    * Single (monaural) channel design provides maximum performance and channel separation. * Fully balanced transformer-coupled input and output stages, including active positive and negative leads on speaker binding posts for optimum speaker control. * Fully balanced input and output topology yie ...
  7. questionWhy is the Model 301 monoblock power amplifier not compatible with the external PC-1 rectifier/conditioner?
    The Model 301 reference monoblock power amplifier already incorporates an active Power Factor Correction (PFC) circuit capable of yielding 1200 Watts of DC power, which is almost twice as much as PC-1. The PC-1 unit is therefore not compatible with the Model 301. If you connect a PC-1 to a Mode ...
  8. questionWhy does Model 301 use Active Power Correction (PFC) current rectification?
    The 1200 Watts active power factor correction (PFC) circuit is key to the refined musical performance of Model 301, and contributes to its remarkable energy efficiency. Active Power Factor Correction (PFC) is an advanced technique for the synchronization of the cycles of voltage and current on ...
  9. questionWhat is the sonic signature of the Model 301 monoblock power amplifier?
    Model 301 is a reference monoblock power amplifier that inherits the hallmark sonic character of Jeff Rowland's great classic productsótremendous authority, impressive imaging and staging, and a superior grain free musicality. Yet, the extraordinary sonic potential of a number of advance ...
  10. questionHow does the 301 reference monoblock amplifier exceed the performance of The Model 312 stereo?
    With its monoblock design, its proprietary custom highly regulated switch mode power supply, its massive power factor correction (PFC) capacity, and its configurability for high and low impedance speakers, Model 301 even surpasses the extraordinary sonic performance of the celebrated Model 312 s ...
  11. questionHow can The Model 301 reference monoblock power amplifier exceed the performance of world-class amplifiers, including Jeff Rowland's own great classic designs?
    Model 301 is Jeff Rowlandís highest artistic and engineering achievement in a reference monoblock power amplifier during a quarter century of continued technological leadership. It even surpasses the extraordinary sonic performance of the celebrated Model 9HC monoblock power amplifier. Du ...
  12. questionWhat is the power conversion efficiency of the Model 301 reference monoblock power amplifier?
    Thanks to a build in Power Factor Correction (PFC) rectifier, a highly regulated proprietary switching power supply, and the green ICEpower 1000ASP power conversion module, The Model 301 monoblock power amplifier achieves an astonishing power conversion efficiency of 98%. This means that Model ...
  13. questionWhy is there a bank of capacitors following the PFC rectifier in the Model 301 reference monoblock power amplifier?
    The DC current generated by the front end of the Model 301 monoblock power amplifier is further cleaned of unwanted ripples and random noise spikes by filtering it through a bank of charge capacitors. The cleaned DC current is then fed to the proprietary highly regulated switch mode power supply ...
  14. questionWhy does the Model 301 reference monoblock amplifier feature fully balanced output stages?
    The Model 301 is fully balanced in its output stage to maximize speaker control and authority, staging and imaging, nuance and resolution, while halving the levels of output currents. The uncompromising balanced design of the Model 301 reference monoblock power amplifier extends to its output st ...
  15. questionWhy are both the positive and negative leads on Model 301 speaker connectors carrying current?
    The uncompromising symmetrically balanced design of The Model 301 monoblock amplifier extends to its output stage to yield superior speaker control at any load. The ICEpower 1000 ASP modules at the core of Model 301 is inherently balanced, and drives the output stage with a symmetrically balance ...
  16. questionIs Model 301 a green product, and why is it important?
    Jeff Rowland is committed to help manage responsibly the finite energy resources of our planet. This is one of the many reasons why he has embraced the green technologies of switch mode power supplies and class D ICEpower in the Model 301 reference monoblock power amplifier. Model 301 enjoys a s ...
  17. questionCan Model 301 drive any speaker load?
    The Model 301 monoblock amplifier in parallel configuration supports low to medium efficiency speakers, sporting input impedance loads between 2 and 8 Ohms. IN series configuration, Model 301 supports higher efficiency speakers with higher input impedances--higher than 8 Ohms and up to 16 Ohms. ...
  18. questionHow to connect Model 301 to bi-wired speakers?
    The Model 301 monoblock power amplifier features two pairs of binding posts per chassis to facilitate bi-wiring. Both sets of binding posts are active and connected in parallel with no difference in signal quality. As the connections are the same, there is no specific set of binding posts that s ...
  19. questionIs Model 301 compatible with tube preamplifiers and other high output impedance preamplifiers?
    The Model 301 reference monoblock power amplifier has an input impedance of 40K Ohms. Its high input impedance makes Model 301 compatible with the output impedance of almost any preamplifiers and preamplifiers on the market, including high output impedance tube-based preamplifiers.
  20. questionWhere is the serial number of The Model 301 monoblock power amplifier located?
    The serial number of The Model 301 monoblock power amplifier is located on the rear panel of each chassis, and begins with the letters "MA" followed by 4 digits. Serial numbers must be included with any correspondence with the factory.
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