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Jeff Rowland classic products continue to enjoy pride of place in many fine audio systems as is evidenced by the fact that our very first offerings continue to deliver musical satisfaction to many of our earliest clients.
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Jeff Rowland classic products continue to enjoy pride of place in many fine audio systems as is evidenced by the fact that our very first offerings continue to deliver musical satisfaction to many of our earliest clients.
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Jeff Rowland classic products continue to enjoy pride of place in many fine audio systems as is evidenced by the fact that our very first offerings continue to deliver musical satisfaction to many of our earliest clients.
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Jeff Rowland classic products continue to enjoy pride of place in many fine audio systems as is evidenced by the fact that our very first offerings continue to deliver musical satisfaction to many of our earliest clients.

There were 12 articles found in this category:

  1. questionRecommendations - Cables, Power Line Conditioner, or Other Equipment
    Various accessories such as power cords, interconnects, power conditioners, and even more so major components such as speakers, as well as analog or digital front ends, often have a significant effect on the sound of a music reproduction system. Unfortunately, the sonic effect of such products i ...
  2. questionWhat are the Different Generations of the Synergy Preamplifier? What Upgrades are Available?
    There have been three different generations of the Synergy Stereo Preamplifier, The original Synergy preamplifier (1/1996 through 3/1997), the Synergy II Stereo Preamplifier (3/1997 through 12/2000), and the Synergy IIi (1/2001 through 5/2006). All Synergy and Synergy II units have a RED volume ...
  3. questionIf I disconnect my Coherence Preamplifier from AC power, what is the proper procedure?
    If you disconnect the Coherence Preamplifier from AC power, you must hold the "mode" button on the power supply for 10 seconds, or until a "click" is heard. If you do not perform this disconnect procedure, one of the two internal batteries will continue to discharge, causing a potential battery ...
  4. questionWhat are the Differences Between the Concentra and Concentra II? How do I Tell Them Apart? Can an Original Concentra be Upgraded to Series II?
    The original Concentra (9/1996 through 1/2001) was a 100 watt per channel integrated amplifier. The Concentra II (1/2001 through 10/2003) is a 150 watt per channel integrated amplifier, so the series II version has 50% more output power available. The Series II version of the Concentra also has ...
  5. questionWill the optional phono stage of the Concentra accept both MC & MM cartridges?
    Yes.
  6. questionHow do I get my display to turn off after 5 seconds?
    CONCENTRA LED Volume Level Display The LED Display on JRDG equipment operates in either of two modes. Constant display, or 5 second display. In the 5 sec. mode, the screen will be blank until a change in status (input select, volume level, etc.) is sent to the unit. The display will come on for ...
  7. questionIs there an update for my Model 8 amplifier? What is the difference between Model 8 and Model 8T?
    Yes, all Model 8 amplifiers are eligible for update. Model 8 amplifiers with "Model 8T" nomenclature on the rear panel, serial numbers B80001 through B80055, are also eligible (See Stage 3 update below). All update stages require that the amplifier be returned, in the original factory shipping c ...
  8. questionHow do I know if my Synergy is a Series I, Series II, or Series IIi with the new Amplifier Board?
    The original Synergy had a red volume display and simply had the words "SYNERGY PREAMPLIFIER" printed on the back panel. The Series II version of the Synergy had a red display and the words "SYNERGY PREAMPLIFIER SERIES II" printed on the rear panel. The majority of Synergy IIi preamplifiers have ...
  9. questionDoes the red record lamp always stay on when I have my Synergy preamp in the listen mode?
    Yes.
  10. questionCan I use my Synergy preamplifier in a home theater set-up?
    Yes, simply route your processor front right and left channels into the Synergy bypass inputs. When the bypass switch is depressed, the bypass inputs are routed to the Synergy main outputs at unity gain. All controls on the preamp are disabled. Your processor center and rear outputs go to your c ...
  11. questionWhat is the difference between the Synergy Series I and Series II?
    The Synergy Series II preamplifier began production February 1998. The Series II includes dual outputs for increased versatility, as well as output transformers to bring it sonically closer to the Coherence preamplifier.
  12. questionWhy are JRDG classic products highly sought by audio enthusiasts, and why are they gaining market value?
    Jeff Rowland’s creations bear the hallmark of triple artistry: the art of the reproduction of musical beauty, the art of their elegant electronic engineering and construction, and the art of the understated and timeless sophistication of their refined cabinets. This is why all JRDG power a ...