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Manual TwinTube Model 2714 Version 1.0 – 6/2008 Designer: Jens Gronwald This user's guide contains a description of the product. It in no way represents a guarantee of particular characteristics or results of use. The information in this document has been carefully compiled and verified and, unless otherwise stated or agreed upon, correctly describes the product at the time of packaging with this document.
Contents Important Safety Information ..................................... 4 ............................................................. 6 Scope Of Delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Rear Panel/Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Important Security Information Please note and retain this information. Carefully read and follow all of the safety and operating instructions before you use the machine. Be doubly careful to follow all warnings and special safety instructions noted in this manual and on the unit. The following information refers to modules built into the RackPack frame. Connections: Only use the connections as described. Other connections can lead to health risks and equipment damage.
Important Security Information Lightning: Before thunderstorms or other severe weather, disconnect the machine from wall power (but to avoid life threatening lightning strikes, not during a storm). Similarly, before any severe weather, disconnect ALL the power connections of other machines and antenna and phone/internet cables which may be interconnected so that no lightning damage or overload results from such secondary connections.
Hook Up Fitting A Module The fitting and/or exchange of modules should only be carried out by qualified persons. Please read the manual of the RackPack frame. It contains all information needed to fit a module as well as all safety and notes and warnings. If you don‘t have the manual at hand, you can download it like all SPL product manuals from our website http:// www.soundperformancelab.com.
Introduction The TwinTube module is the first ever combination of two essential tube effects into a single processor, that is, saturation effects along with harmonics processing. Both stages work separately from each other and are based on an individual tube circuit, therefore each module employs two tubes. The effects can therefore not only be applied both individually or separately, but also jointly. Saturation effects are generated through the tube being pushed to and beyond its normal operating limits.
Rear Panel/Connections 1 65 */ .JYFS *OTFSU 4FOE Wiring 16 $POWFSUFS 0VUQVU 5 PS * / .
XLR Sockets, Transformers, Channel Split Rear Panel/Connections The TwinTube is fitted with one XLR input and two XLR outputs for balanced operation. Pin-wiring of all XLR sockets: Pin 1 = GND, Pin 2 = hot (+), Pin 3 = cold (-) Discrete balancing stages for both in- and output provide high common mode rejection and are capable of driving long cables (depending on the capacity of the cables and the following input balancing stages).
Control Elements HAR. ON/SAT. ON, HARMONICS Control HAR. ON/SAT. ON Activating HAR ON engages the HARMONICS control. Likewise you engage SATURATION with the switch SAT. ON. When turned on, these switches illuminate. - 7 0 4*( .0/* )"3 $ 4 One of the both processing stages can be applied therefore respectively separately.
HARMONICS Switch, SATURATION Control Control Elements HARMONICS Switch With the HARMONICS switch you choose the frequency range of the fundamental tone area that should be processed with the HARMONICS control. There are four available frequency ranges with respective center frequencies of 9.8 kHz, 6.6 kHz, 2.8 kHz and 1.9 kHz. For reasons of space, we have rounded frequency values for the values on the front panel.
Control Elements Signal-LED, Overload-LED Signal LED The SIG. LED indicates that an audio signal reaches the input with a level above -20 dB. This LED helps the operator especially in complex setups to determine immediately whether the TwinTube actually receives any signal. - 7 0 4*( .
Application Examples: Vocals, Acoustic Guitars Control Elements Here we refer to only two significant examples, of course without suggesting completeness. We would like to simplify starting with the TwinTube by sharing some thoughts and experiences in these applications areas. The effects and results described here can be applied to many other instruments—nothing should keep you away from using the TwinTube without restriction.
Measurements FFT: Saturation Audio Precision A-A FFT SPECTRUM ANALYSIS 05/21/08 14:53:01 +20 +10 +0 -10 -20 -30 -40 -50 d B u -60 -70 -80 -90 -100 -110 -120 -130 -140 2k 4k 6k 8k 10k 12k 14k 16k 18k 20k 22k 24k Hz Fast Fourier Transformation SATURATION to maximum.
Measurements Harmonics: Boost, THD vs. Saturation Audio Precision RackPack TTP 2714 06/13/08 15:10:24 +20 +15 +10 +5 d B u +0 -5 -10 -15 -20 10 20 50 100 200 500 1k 2k 5k 10k 20k 80k Hz HARMONICS control at maximum. Audio Precision RackPack TTP 2714 06/13/08 15:07:45 +10 +0 -10 -20 -30 d B u -40 -50 -60 -70 -80 -90 -100 -10 -5 +0 +5 +10 +15 +20 dBu THD vs.
Specifications AUDIO Harmonics Stage Frequency Range: 10 Hz-80 kHz THD: 0.1 % @ 1 kHz, 0dBu input level, unity gain Noise, A-weighted -87 dBu Dynamic Range 103 dB Maximum Input Level +18 dBu Harmonics Filter Filter 1 Center Frequency: 9,8 kHz Bandwidth: 9.6 kHz Maximum Gain: +15 dB Filter 2 Center Frequency: 6.6 kHz Bandwidth: 5 kHz Maximum Gain: +15 dB Filter 3 Center Frequency: 2.8 kHz Bandwidth: 9 kHz Maximum Gain: +15 dB Filter 4 Center Frequency: 1.9 kHz Bandwidth: 4.
Specifications AUDIO – CUMULATIVE (Harmonics and Saturation Stage) Frequency Range 10 Hz-77 kHz CMR -74 dBu @ 1 kHz, 0dBu input level, unity gain Noise, A-weighted -87 dBu Dynamic Range 105 dB Max. Input Level +20 dBu Input XLR connector, electronically balanced, opt. transformer balanced Impedance ca. 20 kOhm Outputs Output 1 XLR connector, electronically balanced, optionally transformer balanced Impedance ca.
Block Diagram 18 RackPack: TwinTube
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Option Lundahl Transformers As an option, the TwinTube RackPack module can be fitted with input and output transformers from Lundahl. The transformer options can only be ordered by purchase, a later upgrade is not possible. Information On Lundahl I/O Transformers Transformers have a pleasant sound characteristic, especially the low end sounds rounder and more full-bodied. The top end benefits from a softer and silky atmosphere without being emphasized.
