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  KingRex Preamplifier
 
 
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Our Price: $379.00


Availability: Ships within 24 hours of order!
Product Code: 109105

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Description Reviews & Awards
 
Brilliantly executed, with a highly effective and technically sophisticated design, the KingRex preamp delivers versatility, value and performance.

Two Input Sources  
High-quality gold-plated RCA jacks provide two source inputs.

it offers unbelievable value and uncompromised performance.

David Kan
6moons.com

The source is selected automatically depending on which is generating the signal. Switching is carried out via a CMOS digital integrated circuit, the ToshibaTC4001B 2-input NOR gate. (When using two sources, the one not being used should be muted or turned off.)
Quality Parts  
Key components include three pairs of Burr-Brown ICs: OPA627 for preamplification, BUF634 for increasing and sustaining higher output current, OPA177 for DC servo.
  • Pre-Amp uses a low-noise FET input op-amp. The highly-regarded and expensive OPA627 is used as the main op-amp.  A new-generation FET (Difet) op-amp, it is known for its low noise and high speed.    
  • The  BUF634 is a high-speed op-amp used to increase and sustain higher current output. It also improves the compatibility with power amps and loudspeakers
  • OPA177 makes sure the op-amp output is free of DC, avoiding any chances of harming the power amp and the loudspeakers.
  • The KingRex Preamplifier, like all KingRex audio components, is cased in black steel with a heavy (6mm-thick) anodized aluminum faceplate and recessed volume knob.
Designed for Sonic Excellence
  • The addition of the OPA177-based DC servo circuit eliminates output coupling capacitors, resulting in a purer and more accurate representation of the original source.
  • A built-in 'diamond buffer' stage is added at the input to increase the dynamic range.
  • When matched with low-power amps, it will improve compatibility and performance with lower-efficiency speakers.
Easy to Upgrade  
  • To help you find your favorite sound, KingRex designed the Preamplifier with socketed op-amps. This allows you to change the op-amp when new and better units become available.
Specifications
Frequency Response
 20Hz-20Khz(+/-0.5db)
Noise Level -104.6db (A)
Dynamic Range
 104.5db (A)
Total Harmonic Distortion Less than 0.0047% (20Hz-20Khz)
IMD+Noise A-weighted)  Less than 0.006%
Line Inputs 2 Channels (RCA Auto Select)
Line Output 1 Channel (RCA)
Power Requirements 100-120VAC or 200-240VAC (50/60Hz)
Power Consumption
 Less than 5W
Dimensions 185mm wide x 150mm deep x 50mm tall
Weight
 3 lbs. (1.26 kg)


 

Average Customer Review: Based on 2 Reviews. Write a review.

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  2 of 2 people found the following review helpful:
 
The best $360 I've spent on audio: June 26, 2008
Reviewer: Anonymous person from Andover, MA United States  
The reviews are not kidding. I have been using one of those marvelous little Single Ended Triode tube amplifiers. It is an integrated amp so it does not "need" a preamp.

Adding the little KingRex preamp has vaulted my system to the next level, and it has not even broken in yet.

Transparency, dynamics and bass response are all enhanced. This partly due to running the amplifier's built in gain stage at an optimum level.

I was very worried about adding an inexpensive solid state preamp to this system, but I am stunned by the result. You owe it to yourself to try out one of these little gems.

All the best,
Jonathan

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  2 of 2 people found the following review helpful:
 
Unbelieveable Value June 16, 2008
Reviewer: Kevin P. from Sioux Falls, SD United States  
The Kingrex has allowed me to hear details that I have never heard before. It's like a several layers of "haze" have just been removed. For the 1st time I don't just hear a drum, I hear the stick striking the skin, with all the attack and resonance of the drum. The Bass is nothing short of incredible. I suspect it is the absence of DC-Blocking caps in the circuit.
I loaned the preamp out to a friend of mine (who happens to be an nationally award winning speaker designer) He calls me up the following day and begins to tell me how everything he put through it, just sounded "better" (and he owns stereophile class-A type gear) He then says that he will be purchasing oneand that it is a real giant-killer of a preamp.
Highly Recommended!
Review system: Musiland MD-10 DAC, Bryston 3B-ST amp, foobar 2K, running ASIO thru USB, Pioneer SACD/DVD-A, CD transport/player, Gar Kellogg custom 2-way mini-monitors (modeled after Magico mini-monitors) various HQ cabling/connectors.

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