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Behringer Tube ultrafex T1954 - User Manual

Behringer Tube ultrafex T1954
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TUBE ULTRAFEX
®
T1954
www.behringer.com
Version 1.1 December 2001
Users Manual
ENGLISH
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Summary

Safety Instructions

General Safety Precautions

Details crucial warnings, cautions, and advice for safe product operation and handling.

Operating Environment Safety

Specifies safe usage conditions concerning water, ventilation, and heat exposure.

Power and Servicing Safety

Outlines precautions for power connection, grounding, cleaning, and authorized servicing.

Foreword

Behringer Tube Ultrafex Key Features

Core Tube and Sonic Enhancement Technologies

Highlights key technologies like ULTRA-TUBE, Natural Sonic, VSP, and noise reduction.

Bass and Multiband Processing

Details vintage bass sound options and multiband processing capabilities.

Build Quality and Connectivity

Covers construction, components, bypass function, and input/output options.

1. Introduction

The Design Concept

Explains the unit's development, integration of tube technology, and psycho-acoustic principles.

Before You Begin Setup

Guidance on initial checks, packaging inspection, and preparation for use.

1. Introduction - Control Elements

Front Panel Control Elements

Overview of switches, rotary controls, LEDs, and analog VU meters.

1. Introduction - Controls Explained

Low Band and High Band Controls

Explains adjustments for bass (LOW MIX, BASS MODE) and treble (HIGH MIX, TUNE).

1. Introduction - Advanced Controls

Surround and Tube Section Controls

Describes operation of SURROUND, WARMTH, and POWER controls.

Rear Panel Connections and Indicators

Identifies serial number, fuse holder, voltage selector, and input/output connectors.

2. Operation and Usage

Operation Overview

Introduces the unit's combined sonic enhancement and tube sound capabilities.

Signal Path Placement

Recommends optimal positions for integrating the TUBE ULTRAFEX in an audio signal chain.

2. Operation and Usage - Controls

Basic Setting and Noise Reduction

Initial setup, calibration, and adjusting the noise reduction system sensitivity.

Bass Processor and Enhancer;Exciter Tuning

Configuration for bass enhancement and Natural Sonic/VSP enhancer/exciter.

2. Operation and Usage - Advanced

Tube Stage Adjustment

How to adjust the WARMTH control to add subtle or pronounced tube character.

Surround Processor Adjustment

Instructions for configuring the SURROUND control for stereo enhancement.

3. Applications and Use Cases

Sound Enhancement During Playback

Using the unit to improve the sound quality of playback systems.

3. Applications and Use Cases - Recording

Sound Enhancement During Recording

Strategies for improving audio quality during recording and tape duplication.

Tape Duplication and Instrument Improvement

Compensating for copy loss and enhancing instruments like synths and drums.

System-Wide Applications

Applying enhancement to subgroups, PA systems, and live sound.

3. Applications and Use Cases - Systems

HiFi and Video Sound Improvement

Integrating the TUBE ULTRAFEX into home audio and video systems.

4. Technical Background

Behringer Tube Ultrafex Benefits

Summarizes the sonic improvements and advantages offered by the processor.

4. Technical Background - Hearing Science

Psycho-acoustic Principles of Hearing

Discusses how the human ear interprets sound, including spatial localization.

Psycho-acoustic Device Functionality

Details the three core principles behind psycho-acoustic sound enhancement.

4. Technical Background - Processing

Frequency, Phase, and Harmonics Processing

Explains frequency correction, phase shifting, and artificial harmonics generation.

Bass Processor Technical Details

Explains the LC filter and frequency-selective phase shift for bass.

4. Technical Background - Components

Surround Processor Mechanism

Explains how the surround effect is derived from stereo signal differences.

Vacuum Tube Technology Explained

Overview of traditional tube technology and its integration into modern audio.

4. Technical Background - Tube History

History of Vacuum Tubes

Covers early patents and milestones in tube technology development.

Tube Design and Function

Explains the basic structure and operation of diodes, triodes, and pentodes.

4. Technical Background - Tube Properties

Properties and Distortion of Tubes

Covers tube saturation, distortion types, and even/odd harmonics.

4. Technical Background - Applications

Optimizing Tube and Transistor Use

Discusses the synergy of combining tube and semiconductor technologies.

Studio Tube Applications

Details the subtle use of tubes in studios versus aggressive guitar amp settings.

5. Installation and Setup

5. Installation and Setup - Connections

Rack Mounting Guidelines

Instructions for fitting the unit into a standard 19-inch equipment rack.

Mains Power Connection

Steps for connecting the unit to the AC power supply, including voltage checks.

Audio Input;Output Connections

Details on connecting audio signals via XLR and 1/4" TRS connectors.

5. Installation and Setup - Outputs

Transformer-Balanced Outputs

Details on optional transformer-balanced outputs for galvanic isolation.

6. Specifications

7. Warranty and Service

Product Registration and Coverage

Steps for registering the product to activate extended warranty coverage.

Service and Claims Procedures

Information on return authorization, warranty terms, and damage claims.

Overview

The BEHRINGER TUBE ULTRAFEX T1954 is a professional, multi-purpose sound enhancement system designed for high-end studio and stage applications, combining the sound enhancement features of the ULTRAFEX series with the musical tube sound of BEHRINGER's ULTRA-TUBE technology. This high-end sound enhancement processor is based on extensive experience and discoveries in psycho-acoustics, offering sound precision and flexibility for professional sound improvement.

Function Description:

The TUBE ULTRAFEX T1954 features a new ULTRA-TUBE® circuitry that warms up music without unwanted noise. A dedicated "Warmth" control allows users to adjust the amount of tube sound desired. The unit incorporates selected 12AX7 tubes for an outstanding, ultra-musical tube sound, adding sparkle to music and making instruments or mixes stand out. It releases untapped sonic resources and adds detail to instruments, vocals, and mixed program material.

The multiband concept provides incredible bass power and high-frequency transparency. A "Natural Sonic" processor ensures ultra-musical sound improvement, while the VSP (Variable Sound Processing) circuit allows for simultaneous enhancer and exciter processing. A special LC coil/cap filter produces authentic vintage "soft" and "tight" bass sounds. The integrated Surround processor provides real spatial enhancement and improved stereo imaging.

A built-in noise reduction system with a precision LED display offers clear visual indication of operation. The unit features servo-balanced gold-plated XLR and 1/4" TRS inputs and outputs, and ultra low-noise 4580 audio operational amplifiers ensure outstanding sound performance. A relay-controlled hard bypass with an auto-bypass function during power failure (failsafe relay) ensures signal continuity. High-quality detented potentiometers and switches with authentic vintage style knobs, along with huge back-lit analog VU meters and a "retro" design, complete the user interface. The BEHRINGER high-performance OT-1 output transformer is retrofitable for enhanced performance.

Important Technical Specifications:

  • Audio Inputs:
    • Connectors: XLR and 1/4" TRS connector
    • Type: RF filtered, servo-balanced input
    • Impedance: 50 kOhms balanced, 25 kOhm unbalanced
    • Max. Input Level: +21 dBu balanced and unbalanced (unity gain)
    • CMRR: typ. 40 dB, >55 dB @ 1 kHz
  • Audio Outputs:
    • Connectors: XLR and 1/4" TRS connector
    • Type: Electronically servo-balanced output stage (optional transformer-balanced)
    • Impedance: 60 Ohms balanced, 30 Ohm unbalanced
    • Max. Output Level: +21 dBu, +20 dBm balanced and unbalanced
  • System Specifications:
    • Bandwidth: 18 Hz to 30 kHz, +/-3 dB
    • Signal-to-noise ratio: >100 dB, unweighted, 22 Hz to 22 kHz
    • THD: 0.008% typ. @ +4 dBu, 1 kHz, Gain 1; 0.04% typ. @ +20 dBu, 1 kHz, Gain 1
    • IMD: 0.01% typ. SMPTE
    • Crosstalk: <-100 dB, 22 Hz to 22 kHz
  • Bass Processor:
    • Type: "Dual Mode" Bass Processor
    • Low Mix: variable (0 to 6)
  • Multiband Processor:
    • Type: "Natural Sonic" Processor with VSP (Variable Sound Processing)
    • NR Sensitivity: variable (0 to 6)
    • Tune: variable (1 to 8 kHz)
    • Process: variable (enhancer to exciter)
    • High Mix: variable (0 to 6)
  • Surround Section:
    • Surround: variable (0 to 6)
  • Function Switches and Controls:
    • L/C Filter: switches the bass sound from "Soft" to "Tight"
    • Effect In/Out: activates the relay controlled hard bypass
    • Surround In/Out: activates the Surround Processor
    • Warmth: variable
  • Power Supply:
    • Mains voltages: USA/Canada 120 V~, 60 Hz; U.K./Australia 240 V~, 50 Hz; Europe 230 V~, 50 Hz; General export model 100-120 V~, 200-240 V~, 50-60 Hz
    • Power consumption: 25 Watts
    • Fuse: 100-120 V ~: T1AH; 200-240 V ~: T 500 mA H
    • Mains connection: standard IEC receptacle
  • Physical:
    • Dimensions: approx. 3 1/2" (89.5 mm) x 19" (482.6 mm) x 8 1/2" (217 mm)
    • Net weight: approx. 8.0 kg
    • Shipping weight: approx. 10.0 kg

Usage Features:

The TUBE ULTRAFEX T1954 is designed for versatile application in various audio scenarios. It can be used for sound enhancement during replay, recording, and tape duplication. For replay, it is typically inserted between the master or multi-track recorder and the mixer/amplifier. During recording, it can be placed directly after the mixer's master output in the recording path to compensate for quality loss, especially with poor storage media or multiple generations of copies.

The unit can enhance subgroups, monitor, and effect paths. If the mixer has subgroup inserts, subgroups can be processed separately. Alternatively, monitor and effect paths can be routed through a free input channel of the TUBE ULTRAFEX, with the unit acting as the last component in the effects chain.

For instruments, the TUBE ULTRAFEX improves the sound of electronic musical instruments by overcoming bandwidth limitations, making synthesizers, samplers, and drum machines sound more natural and transparent. It emphasizes tiny details in acoustic instruments like guitars and adds "punch" to drum instruments. Low-level signal sources like microphones and guitars should pass through a pre-amplifier before processing.

In P.A. and sound reinforcement systems, the TUBE ULTRAFEX offers significant advantages, improving intelligibility and range, making vocals more transparent, and enhancing instrument distinction. It increases speaker system acoustic performance and penetration, requiring less amplifier power due to subjectively increased volume.

The TUBE ULTRAFEX also finds applications in HiFi and video systems, placed between the signal source (cassette recorder, tuner, VCR) and the power amplifier, often using "tape monitor" inputs for flexible integration.

The unit's dual-channel design allows for independent processing of two mono signals. The SURROUND IN/OUT switch activates the surround section, but must be disengaged for separate dual-channel mono processing to avoid crosstalk. The SURROUND control adjusts the stereo effect intensity, suitable only for stereo program material. The WARMTH control adjusts the amount of upper harmonics added by the tube stage, which can be monitored via the WARMTH METER. The EFFECT IN/OUT switch activates the complete signal process and tube circuitry, providing a hard-bypass function when switched off for comparison with the input signal.

The Bass Processor's LOW MIX control adjusts the amount of signal for bass enhancement, while the LC FILTER switch provides a "dry" and "punchy" bass sound. The NR SENSITIVITY control adapts the noise reduction system to the input level and controls the enhancer/exciter sensitivity, with three LEDs indicating the effect signal's passage. The TUNE control sets the high-pass filter's cut-off frequency (1 to 8 kHz) for the Natural Sonic processor. The PROCESS control determines the function, activating exciter for transparency and sharpness when turned clockwise, or enhancer for existing high-frequency information.

Maintenance Features:

The TUBE ULTRAFEX T1954 is manufactured under an ISO9000 certified management system, ensuring high-quality components and rugged construction for long life. The unit is designed to be rack-mounted in two standard 19" rack units, requiring additional depth for connectors and adequate air space for cooling.

For mains connection, users must ensure the local voltage matches the unit's requirements. The combined fuse holder/voltage selector allows switching between 230 V and 115 V by rotating the fuse holder 180 degrees. Blown fuses must be replaced with fuses of the correct type and rating as specified in the appendix.

The audio inputs and outputs are electronically servo-balanced, providing automatic hum and noise reduction and compensating for level differences with unbalanced connections. For critical applications, transformer-balanced outputs can be retrofitted using the optional BEHRINGER OT-1 output transformer to avoid ground loops and potential differences.

The device features failsafe relays that automatically bypass the unit in case of power supply disconnection or failure, preventing damaging switch-on thumps by isolating the unit until power rails are settled. Regular cleaning as recommended by the manufacturer is advised. For non-use periods, the power cord should be unplugged. Care should be taken to prevent debris or liquids from entering the enclosure. Servicing should be referred to qualified personnel, as unauthorized repairs void the warranty.

Behringer Tube ultrafex T1954 Specifications

General IconGeneral
BrandBehringer
ModelTube ultrafex T1954
CategoryRecording Equipment
LanguageEnglish

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