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Introducing the new

SX-1000R Monoblock


Awards for the original SX-1000:

  • Description
  • Features
  • Specifications
  • Reviews
  • Downloads

Introducting the evolution of our most powerful monoblock amplifier, the SX-1000R. The new SX-1000R amplifier delivers over 1000 watts and offers the discerning audiophile the cleanest, most transparent sound available from any power source on the market. Utilizing an all-new input board developed exclusively for the "R" version, the SX-1000R is smoother, more refined and more engaging than the original SX-1000, yet still retains the awesome power that puts it head and shoulders above the competition. Ultra robust power amp topology provides stability down to 2 ohms and the efficiency to remain cool even in the most demanding applications.

A proprietary FET input buffer allows both XLR and RCA input options while feeding the power amp with a ultra-low noise, low distortion signal. WBT nextgen™ binding posts and Kimber Kable TCX wiring come standard — completing the signal path with ultimate purity. The result of our obsession with technology is an expansive, transparent listening experience allowing every instrument to shine through. The SX-1000R is further identified by its moniker on the backplate and a smart looking custom color option - Anthracite Gray. Also available in black.

  • Powered by ICEpower® (ASP module)
  • Up to 625w in 8O
  • Factory Selectable mains 115/230VAC
  • Idle power consumption 10w
  • Thermal protection
  • Differential, fully balanced
  • Over-current protection
  • DC protection
  • Upgraded, improved input stage raises input impedance to 91kO
  • Sound optimized soft clip
  • Rugged construction
  • Standard 12V DC Trigger
  • ½” Machined and Anodized front panels
  • WBT nextgen™ binding posts
  • Internal Kimber Kable TCX multi-gauge, multi-strand wire
  • Gold Plated unbalanced (RCA) input
  • Neutrik Balanced (XLR) input
  • Available, custom Anthracite gray color chassis
  • Compact size (8.5”W x 4.125”H x 13.5”D)
  • 13 lbs.
  • Covered by a 5 YEAR WARRANTY (original purchaser )



  • Typical THD+N 8O (10W out): 0.0055%
  • Power Output 8O @ 0.2% THD+N: 570W
  • Power Output 8O @ 1.0% THD+N: 625W
  • Power Output 4O @ 0.2% THD+N: 1,140W
  • Power Output 4O @ 1.0% THD+N: 1,225W
  • IMD (CCIF): 0.0005%
  • Transient Inter modulation (TIM): 0.005%
  • Output Idle Noise: <80µV
  • Efficiency 4O: 79% @ 1000W
  • Efficiency 8O: 78% @ 500W
  • Frequency Response 20Hz-20kHz: ± 0.4db
  • Lower Bandwidth: 3.3Hz (All Loads)
  • Balanced Input Impedance: 91kO
  • Unbalanced Input Impedance: 91kO
  • Dynamic Range: 118db
  • Gain: 27db
  • Sensitivity: 2.95V
  • Output Impedance: 0.005O
  • Min Load: 2ohms
  • Dampening Factor (100Hz 8O): 2000
  • Max Output Current: 40A
  • Channel Tracking: < ± 0.02 db
  • Idle Power Consumption: 15W


Regarding our SX-1000R mono amplifier: "Bass extension, speed, and pitch definition through the SX-1000R proved to be among the best I’ve heard from any power amplifier…. Inner detail and low-level information retention were exemplary…. It is, without a doubt, a fine and near-state-of-the-art performer [and] practically a shoe-in for a TAS Editors’ Choice award. It is simply that good." Read the full review in the latest The Absolute Sound. (And of course, the SX-1000R did win that Editors' Choice Award!)

Customer feedback on SX-1000 monoblocks

Just a bit of trivia that may prove useful to you or your clients.

 The w4s SX1000 monos you sold me seem have a  synergistic empathy with magneplanars but especially apogee speakers that I think consistently betters the classic combinations like Saunders for Maggies & Krell or Classe with Apogee.

I personally have owned most of these & listened to all of them so I speak with some confidence. Ribbons seem to love these amps. But the big wired monos  are easily as good.

 I recently listened to a $40,000 Linn system @ a dealer. It was brilliant. I left well satisfied with what I've got.

Thanks again---------- regards, John. 

Wyred 4 Sound SX-1000 Monos

Their ability to unravel complex musical information and extract the minutest of details was exceptional.
Paul Candy
— 6moons

Wyred4Sound SX-1000 Monoblock Power Amplifier

Products like the SX-1000 prove exactly what well engineered class D components are capable of.
Stephen Hornbrook
— Secrets of Home Theater and High Fidelity