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Behringer T1951 - page 1
TUBEULTRA-Q ® T1951 www.behringer.com Version 1.1 N ovember 2001 Users Manual ENGLISH ...
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Behringer T1951 - page 2
2 TUBE UL TRA-Q T1951 This symbol, wherever it appears, alerts you to important operating and mainte- nance instructions in the accompanying literature. Read the manual. SAFETY INSTRUCTIONS C AU T I ON : To reduce the risk of electric shock, do not remove the cover (or back). No user serviceable parts inside; refer servicing to qualified personnel. ...
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Behringer T1951 - page 3
3 TUBE UL TRA-Q T1951 FOREWORD Dear Customer, We thank you for expressing your confidence in BEHRINGER products by purchasing the BEHRINGER TUBEULTRA-Q. It is one of my most pleasant tasks to write this preface, as our engineering team has made it possible to enhance the traditional tube circuitry design (particularly for our VINTAGER series of ...
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Behringer T1951 - page 4
4 TUBE UL TRA-Q T1951 T1951 TUBEULTRA-Q ® 2 x 4-Band Parametric Tube Equalizer s 4-band parametric stereo equalizer with selected 12AX7 tubes s ULTRA-TUBE circuitry (UTC) adds desired amount of warmth without additional noise s Parallel filter architecture ensures minimal phase shifting s Precision state-variable filters with constant-Q charact ...
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Behringer T1951 - page 5
5 TUBE UL TRA-Q T1951 T ABLE OF CONTENTS 1 . INTRODUCTION .. ................................................................................................................... 6 1.1 The concept .................................................................................................................................... 6 1. 2 Before you get ...
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Behringer T1951 - page 6
6 TUBE UL TRA-Q T1951 1. INTRODUCTION With the BEHRINGER TUBEULTRA-Q T1951 you have purchased an innovative device. Parametric equalizers represent the most advanced form of equalization systems. With the TUBEULTRA-Q you have purchased an extremely musical and flexible device. Our ULTRA-Q range of devices has been a hit ever since we introduc ...
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Behringer T1951 - page 7
7 TUBE UL TRA-Q T1951 Be sure that there is enough space around the unit for cooling and please do not place the TUBE ULTRA-Q on high temperature devices such as power amplifiers etc. to avoid overheating. + Before you connect your TUBEULTRA-Q to the mains, please make sure that your local voltage matches the voltage required by the unit! The ma ...
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Behringer T1951 - page 8
8 TUBE UL TRA-Q T1951 4 The FREQUENCY control selects the filters center frequency, which can be freely chosen within the frequency range of the associated band. 5 The LEVEL control determines the amount of level boost/cut. The setting range is from -15 to +15dB. 6 The BANDWIDTH control determines the slope or quality of the filter. Settings ...
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Behringer T1951 - page 9
9 TUBE UL TRA-Q T1951 12 SERIAL NUMBER . Please complete and return the warranty card within 14 days of the date of purchase. Otherwise, you will lose your right to the extended warranty. Alternatively, you can register online at our website under www.behringer.com. 13 FUSE HOLDER / VOLTAGE SELECTION . Before connecting the T1951, confirm that the ...
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Behringer T1951 - page 10
10 TUBE UL TRA-Q T1951 like feedback. In live applications uncontrolled feedback can cause damage to loudspeakers and amplifiers. By means of the INPUT control you can adapt the sensitivity of the TUBE ULTRA-Q to the input level. The sensitivity can be varied within a range of -15 to +15dB. Set the INPUT control so that the PEAK LED lights up on ...
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Behringer T1951 - page 11
11 TUBE UL TRA-Q T1951 Fig. 2.1: Various filter qualities 2. 4 Setting of the tube stage With the settings you have achieved so far a considerable sound improvement can be made. You may not know this, but you have already benefitted from the tube stage of the TUBEULTRA-Q. Even when the WARMTH control is turned fully counter-clockwise, subtle and ...
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Behringer T1951 - page 12
12 TUBE UL TRA-Q T1951 Because of the wide overlap possibility of the different filters, the effect of two filters can be added together if so desired. This way an even greater attenuation or boost can be achieved. When notching out frequencies try to make the band as small as possible. Always as little as possible but as much as needed. 3. 2 Shelv ...
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Behringer T1951 - page 13
13 TUBE UL TRA-Q T1951 Center freque ncy (Hz) 1/3 octave Effects on mu sic 31 to 63 Fundam entals of bass dr um, tuba, do uble bass and or gan. Thes e frequencies give mus ic a se nse of power. If over- emphas ized they mak e the m usic "m uddy". The 50 or 60 Hz band is also used to rejec t AC ma ins hum . 80 to 125 Fundam entals of lower ...
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Behringer T1951 - page 14
14 TUBE UL TRA-Q T1951 Center frequency (Hz) 1/3 octav e Effects on voice 40 to 125 Sense of power in som e outstanding bass s ingers. 160 to 250 Voice fundam entals. 315 to 500 Im portant for voic e quality. 630 to 1k Impor tant for voice naturalness. Too muc h boost in the 315 to 1 kHz range produces a telephone-lik e quality . 1.25k to 4k Voice ...
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Behringer T1951 - page 15
15 TUBE UL TRA-Q T1951 It is quite obvious that compromises must be made to meet these requirements. In rooms with poor acoustics or a high level of background noise, both natural sound and acoustic power can usually not be realized simultaneously. Priority must be given to one of these quality-improving measures. However, it should be noted that e ...
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Behringer T1951 - page 16
16 TUBE UL TRA-Q T1951 In complex sound reinforcement systems comprising different speakers located in varying acoustic environments (e.g. theaters with front speakers, various side-fill speakers and/or balcony speakers) each single time-delayed channel should be equipped with a separate TUBEULTRA-Q, as this is the only way to make provision for ...
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Behringer T1951 - page 17
17 TUBE UL TRA-Q T1951 kind be identified and eliminated, before the actual musical fine-tuning of the sound image takes place. Still, extreme settings can be realized by overlapping the frequencies of the individual bands. 4. 4 On phase shift and time delay Any analog filter, be it graphic or parametric, produces a certain amount of phase sh ...
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Behringer T1951 - page 18
18 TUBE UL TRA-Q T1951 allowed for loss-free copying of audio signals. As digital media were enhanced, however, many people began to miss the warmth, power and liveliness they knew from analog recordings. This is why purists still today consider digital recordings as sterile in sound. 4.5 .2 Design and functional principle of tubes Tubes can ...
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Behringer T1951 - page 19
19 TUBE UL TRA-Q T1951 In a triode the capacitance between grid and anode is a problem with regard to high frequencies and large amplification factors. For this reason, the pentode has a positively charged screen grid between the control grid and the anode. However, the positive charge of the screen grid attracts electrons emitted from the anode pl ...
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Behringer T1951 - page 20
20 TUBE UL TRA-Q T1951 4.5.5 UTC circuit In Out WARMTH Fig. 4.4: UTC circuit The TUBEULTRA-Q splits up the audio signal applied at the input, and processes it differently for both signal paths. Each of the two tube halves amplifies the original signal and the signal modified in its phase spectrum (twin triode). Additional harmonics are produced ...
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Behringer T1951 - page 21
21 TUBE UL TRA-Q T1951 Video T ape Compact Disc Analog Records FM Radio Digital T ape (16 Bit) Analog T ape dB 100 75 50 25 Analog Mixing Console Fig. 4.5: Dynamic range of various media 5. INSTALLATION 5. 1 Rack mounting The BEHRINGER TUBEULTRA-Q fits into two standard 19" rack units of space. Please allow at least an additional 4" de ...
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Behringer T1951 - page 22
22 TUBE UL TRA-Q T1951 Critical applications may require to build up a transformer-balanced configuration for the output signals, so as to avoid interference from ground loops or potential differences. For this purpose, we offer our high-quality output transformer OT-1 as a retrofit kit. Fig. 5.1: Different plug types + Never use unbalanced XLR con ...
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Behringer T1951 - page 23
23 TUBE UL TRA-Q T1951 6. SPECIFICATIONS Audio input Connectors XLR and 1/4" TRS Ty pe RF filtered, servo-balanced input stage Impedance 50 k Oh m balanced, 25 kOhm unbalanced Max. input level +21dBu balanced and unbalanced CMRR t y p . 40dB, >55dB @ 1 kHz Audio output Connectors XLR and 1/4" TRS T yp e electronically servo-ba ...
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Behringer T1951 - page 24
24 TUBE UL TRA-Q T1951 7 . WARRANTY The information contained in this manual is subject to change without notice. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording of any kind, for any purpose, without the express written permission of BEHRINGER S pezi ...
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