BALANCED AUDIO TECHNOLOGY REX II Preamplifier
BAT’S PINNACLE COMPONENT: PURIST DESIGN WITHOUT PEER
The culmination of nearly two decades of design, the fully balanced REX II preamplifier represents the pinnacle of Balanced Audio Technology¹s purist approach to building a statement control center without peer. Featuring a vacuum-tube power module and separate control module, this groundbreaking two-box component features a transformer-coupled output stage (aka T-REX). The latter replaces BAT¹s Six-Pak of output capacitors with custom-designed amorphous core output transformers. Sonically, they offer greater dynamics, transparency, top-to-bottom extension, and a more organic portrayal of music. Easy to use, the REX II boasts an incredible user interface and myriad customizable options. And with the REX II¹s proprietary electronic shunt volume attenuator, you can always get the volume just right.
TRADEMARKED UNISTAGE DESIGN ANCHORS CONTROL MODULE
The signal in the REX II is transmitted through only one gain stage. The UnistageTM circuit provides the ultimate simplicity of amplifying the incoming signal only once, while using no global feedback. Eight 6H30 SuperTubes in the Control Module achieve an extraordinarily high-current, low-impedance drive capability. Indeed, REX II would need 32 6922 tubes to offer the same current delivery! But BAT doesn’t stop there. Imagine the robust nature of a vacuum-tube power supply designed to support this level of instantaneous current delivery, and you have a better idea of the REX II’s peerless excellence.
VACUUM-TUBE POWER MODULE
To support the Control Module¹s signal-handling needs, the separate REX II Power Module contains ten vacuum tubes supported by two, large toroidal transformers in a true dual-mono configuration. Vacuum-tube rectifiers and user-configurable current sources‹as well as vacuum-tube AC shunt regulators‹provide further levels of refinement. The final filtering stage uses BAT’s newest SUPER-PAK of custom oil capacitors, the very same used in the Control Module's SUPER-PAK.
MORE THAN JUST A PREAMP WITH AN EXTERNAL POWER SUPPLY
Contrary to its external appearance, the REX II is not simply a preamplifier with an external power supply box. This conventional type of partition suffers from several well-known drawbacks, foremost being the high-impedance nature of the remote power supply. In the REX II, the control box offers the benefit of a low-impedance local power supply while also preserving an upgrade path for VK-53SE preamplifier owners. BAT designed each box to contain the complete power supply for one polarity. And yes, the size of each individual supply compares that found in many power amplifiers!
EXTREME PERFORMANCE, ENGROSSING MUSICAL REPRODUCTION
Easy to operate out of the box, REX II is just as easy to customize. Name your sources. Fix your volume for the MOVI input alone to allow easy master control of your home theater system from your pre/pro remote. Select a fixed balance adjustment for the phono input to accommodate an older phono cartridge. Possibilities are seemingly endless. Most importantly, REX II provides a level of transparency, dynamic scale, and textural insight that is simply beguiling. This 18-tube statement design lets you hear and feel the power, finesse, and beauty of music in ways you’ve never imagined.
Inputs: 5x XLR Distortion at 2V output: 0.005% Outputs - Main: 2x XLR Maximum Output Signal: 50V Outputs - Tape: 1x XLR Absolute Polarity: Switchable Maximum Gain: 18dB Tube Complement - Control Module: 8x 6H30 Global Feedback: None Tube Complement - Power Module: 2x 5AR4, 4x 6C19, 2x 6H30, 2x 6C45 Volume Control Resolution: 0.5dB Power Consumption - Control Module: 220VA Volume Control Number of Steps: 140 Power Consumption - Power Module: 250VA Frequency Response: 2Hz to 200kHz Dimensions - Each Module: 19" x 5.75" x 15.5" Input Impedance (minimum): 100kΩ Weight - Control Module: 40lb. Output Impedance: 200Ω Weight - Power Module: 36lb. Noise (unweighted): -100dB