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The Dangerous Music 2Bus LT Manual
Thank you for choosing products from the exciting line of Dangerous Music
recording equipment. Many years of dependable and trouble free
performance can be expected from our gear. This has been made possible by
careful design, construction, and top-shelf component choices by recording
industry veterans. This manual will assist the user in the installation of the
2Bus LT and calibration of the system.
Contents
Introduction...................................... 1
Safety review.................................... 2
Overview and Hook up......................... 3
Front Panel and Use............................ 4
Calibration....................................... 5
Balanced connections.................................. 6
Unbalanced connections....................... 7
Grounding revisited............................ 8
Connector Pin-Outs............................. 10
Specifications................................... 11
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Table of Contents
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Summary of Contents for Dangerous Music 2Bus LT
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Page 1: Table Of Contents
The Dangerous Music 2Bus LT Manual Thank you for choosing products from the exciting line of Dangerous Music recording equipment. Many years of dependable and trouble free performance can be expected from our gear. This has been made possible by careful design, construction, and top-shelf component choices by recording industry veterans. -
Page 2: Safety Review
If the front panel is hot, it is roasting inside the box. 3. Avoid areas of high magnetic fields. The steel chassis of 2Bus LT is designed to shield the circuits from EMI and RFI (magnetic and radio interference). When installing equipment in racks, it is prudent to put power amplifiers and large power supplies at least several rack spaces, if not in a different rack, away from equipment that deals with low level signals. -
Page 3: Overview And Hook Up
Hook up The 2Bus LT is designed to mix the outputs of two eight channel D/A converters to a stereo recorder (16x2). The 2Bus LT is easily stackable to increase channel numbers and system functions when linked with another 2Bus LT, Mixer, Monitor, or 2Bus. All the XLR’s are pin 2 hot and the connector groups are described as follows:... -
Page 4: Front Panel And Use
DAW with 8 D/A channels available to patch to analog output processing if desired and then, the 2Bus LT. This mix has 8 tracks of drums, one bass, two guitars, one vocal, with reverb and effects for maybe 2 dozen tracks total. Usually, a DAW user would mix this to... -
Page 5: Calibration
The Dangerous 2Bus LT comes to you fully calibrated and ready to hook up. In order to enjoy the full benefits of a 2Bus LT system, the D/As used with it should be aligned. This can be done with the aid of a Voltmeter (VU meter in a compressor or other piece of gear on hand) and the digital oscillator found as a plug-in in most DAW systems. -
Page 6: Balanced Connections
-18dBfs signal at 1 kHz with the digital oscillator to the individual D/A outputs one channel at a time. Turn the 2Bus LT output gain knob all the way up and measure the voltage across pins 2 and 3 of the 2Bus LT output connector. If there is a device in the studio that has a calibrated VU meter (tape machine, compressor, Dangerous MQ) patching the 2Bus LT into it makes for convenient adjustment. -
Page 7: Unbalanced Connections
Unbalanced Connections Unbalanced lines are usually treated the same as balanced because the 2Bus LT will let the signal through while isolating the equipment grounds. If a buzz develops in the speakers when the input cable is connected to LT but goes away when the input cable is unplugged, that means the source equipment needs a ground reference from the LT. -
Page 8: Grounding Revisited
Grounding Revisited Next is a quick set of hints about where to look when trying to cure buzz troubles in a recording studio. While the techniques are not meant to be taken as Gospel (some techs might disagree with this treatise, so be it) these bits of knowledge were gleaned from decades of experience in test equipment use, manual reading, facility design, construction, trouble-shooting and being the chief of maintenance in some of the world’s top studios, as well as problem solving in the home studios of rock stars and remote... - Page 9 Below is a diagram showing how a typical ground loop is made and why it is important to pay attention to the wiring scheme in a studio. The input shield ground lift jumpers in Dangerous Music equipment, and that of many other manufacturers, can help in avoiding ground loops and the associated poor noise performance.
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Page 10: Connector Pin-Outs
Connector Pin-Outs All of the XLR connectors are wired pin 2 high, pin 3 low, and pin 1 shield. Due to back panel space limitations, we were forced to use ‘D’ connectors conforming to the Tascam standard for the main audio input wiring (sorry). Actually, this makes wiring the LT into a modern patchbay very easy as most of the other manufacturers use the same standard. -
Page 11: Specifications
Free 2 year extended warranty with online registration. Standard warranty: 90 days parts and labor, subject to inspection. Does not include damage incurred through abusive operation or modifications/attempted repair by unauthorized technicians. Dangerous Music, Inc. Europe Dangerous Music, Inc. Dangerous Music, Inc. 231 Stevens Road...
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