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Plug and connection assignment

This chapter will help you select the right cables and plugs to connect your valuable equip-

ment in such a way that a perfect sound experience is ensured.
Please note these advices, because especially in ‘Sound & Light’ caution is indicated: Even if a

plug fits into the socket, an incorrect connection may result in a destroyed power amp, a short

circuit or ‘just’ in poor transmission quality!

Unbalanced transmission is mainly used in semi-professional environment and in hifi use.

Instrument cables with two conductors (one core plus shielding) are typical representatives of

the unbalanced transmission. One conductor is ground and shielding while the signal is trans-

mitted through the core.
Unbalanced transmission is susceptible to electromagnetic interference, especially at low

levels, such as microphone signals and when using long cables.
In a professional environment, therefore, the balanced transmission is preferred, because this

enables an undisturbed transmission of signals over long distances. In addition to the conduc-

tors ‘Ground’ and ‘Signal’, in a balanced transmission a second core is added. This also transfers

the signal, but phase-shifted by 180°.

Introduction

Balanced and unbalanced trans-

mission

Plug and connection assignment

 

 

bass head

24

Summary of Contents for Block-800B

Page 1: ...Block 800B bass head user manual...

Page 2: ...Musikhaus Thomann Thomann GmbH Hans Thomann Stra e 1 96138 Burgebrach Deutschland Telephone 49 0 9546 9223 0 E mail info thomann de Internet www thomann de 08 03 2018 ID 424520 V2...

Page 3: ...onventions 6 1 3 Symbols and signal words 6 2 Safety instructions 8 3 Features 13 4 Installation and starting up 14 5 Connections and operating elements 15 6 Technical specifications 22 7 Plug and con...

Page 4: ...ions and all other instructions Keep the manual for future reference Make sure that it is available to all those using the device If you sell the unit please make sure that the buyer also receives thi...

Page 5: ...rd search Use the search function in the electronic version to find the topics of interest for you quickly Online guides Our online guides provide detailed information on technical basics and terms Pe...

Page 6: ...s for connectors and controls are marked by square brackets and italics Examples VOLUME control Mono button 1 3 Symbols and signal words In this section you will find an overview of the meaning of sym...

Page 7: ...nation of symbol and signal word indicates a pos sible dangerous situation that can result in minor injury if it is not avoided NOTICE This combination of symbol and signal word indicates a pos sible...

Page 8: ...red to be improper and may result in personal injury or property damage No liability will be assumed for damages resulting from improper use This device may be used only by persons with sufficient phy...

Page 9: ...like from the unit They could swallow the pieces and choke Never let children unattended use electrical devices DANGER Electric shock caused by high voltages inside Within the device there are areas w...

Page 10: ...e from a regis tered electrician CAUTION Possible hearing damage The device can produce volume levels that may cause temporary or permanent hearing impairment Over an extended period of time even leve...

Page 11: ...rect heat source Keep the device away from naked flames NOTICE Operating conditions This device has been designed for indoor use only To prevent damage never expose the device to any liquid or moistur...

Page 12: ...and that the AC outlet is protected by a residual current circuit breaker Failure to do so could result in damage to the device and possibly injure the user Unplug the device before electrical storms...

Page 13: ...t 4 n Class D ICE power amp n 4 band EQ n Smart compressor n D I output with pre post lift ground switch n Input sensitivity switchable for active or passive basses n Mute function n Tuner output n Li...

Page 14: ...vibration dust and moisture during transportation or storage use the original packaging or your own packaging material suitable for transport or storage respectively Create all connections while the...

Page 15: ...5 Connections and operating elements Front panel Connections and operating elements Block 800B 15...

Page 16: ...hen turn the INPUT control counter clockwise until the LED turns green again 3 BASS Control for boosting attenuating the low frequencies 4 LO MID Control for boosting attenuating the low mid frequenci...

Page 17: ...occur when connecting the device to other grounded equipment In GND position pressed the device ground is connected 9 PRE POST This switch determines where the DI signal is tapped In PRE position the...

Page 18: ...s from hard string attack and increases the sustain of the notes i e the long lingering of single notes 16 MUTE Switch to mute the device 17 INPUT Preamp volume control If the POWER CLIP LED lights up...

Page 19: ...he input level will not be sufficient to fully drive the amplifier When using active instru ments this switch should be in the LOW position otherwise clipping and thus a pre stage overload can easily...

Page 20: ...Rear panel Connections and operating elements bass head 20...

Page 21: ...s interrupted only by plugging a plug into the RETURN input The SEND signal is tapped behind the EQ 23 RETURN 1 4 jack input of the effects loop for returning the processed signal 24 POWER IEC chassis...

Page 22: ...6 Technical specifications Input impedances INPUT HIGH 1 5 M LOW 33 k RETURN 22 k LINE 22 k Output impedances SEND 22 k D I 420 Sound control Bass 100 Hz 12 dB Technical specifications bass head 22...

Page 23: ...B General warnings Power output RMS 800 W 4 Signal to noise ratio 80 dB A weighted Distortion 0 5 Fuse 5 mm 20 mm 6 3 A 250 V slow blow Operating supply voltage AC 230 V 50 Hz Dimensions W H D 240 mm...

Page 24: ...uctors one core plus shielding are typical representatives of the unbalanced transmission One conductor is ground and shielding while the signal is trans mitted through the core Unbalanced transmissio...

Page 25: ...interfering signal is completely neutralized The result is a pure signal without any noise inter ference 1 Signal 2 Ground shielding 1 Signal in phase 2 Signal out of phase 3 Ground 1 4 TS phone plug...

Page 26: ...ht 3 Ground shielding 1 Ground shielding 2 Signal in phase 3 Signal out of phase 4 Shielding on plug housing option Three pole 1 8 mini phone jack stereo unbalanced XLR plug balanced Plug and connecti...

Page 27: ...the notes and markings on the packaging This product is subject to the European Waste Electrical and Electronic Equipment Directive WEEE in its currently valid version Do not dispose with your normal...

Page 28: ...Notes bass head 28...

Page 29: ...Notes Block 800B 29...

Page 30: ...Notes bass head 30...

Page 31: ......

Page 32: ...Musikhaus Thomann Hans Thomann Stra e 1 96138 Burgebrach Germany www thomann de...

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