User Manual Block-300B Bass Head
Thomann GmbH Hans-Thomann-Straße 1 96138 Burgebrach Germany Telephone: +49 (0) 9546 9223-0 Internet: www.thomann.de 21.10.
Table of contents Table of contents 1 General information................................................................................................................................. 1.1 Further information........................................................................................................................... 1.2 Notational conventions.................................................................................................................... 1.3 Symbols and signal words.....
Block-300B Bass Head
General information 1 General information This user manual contains important information on the safe operation of the device. Read and follow all safety notes and all instructions. Save this manual for future reference. Make sure that it is available to all persons using this device. If you sell the device to another user, be sure that they also receive this manual. Our products and user manuals are subject to a process of continuous development.
General information 1.1 Further information On our website (www.thomann.de) you will find lots of further information and details on the following points: Download This manual is also available as PDF file for you to download. Keyword 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.
General information Letterings The letterings 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 symbols and signal words that are used in this manual. Signal word Meaning DANGER! This combination of symbol and signal word indicates an immediate dangerous situation that will result in death or serious injury if it is not avoided.
General information Warning signs Type of danger Warning – high-voltage. Warning – danger zone.
Safety instructions 2 Safety instructions Intended use This device is intended to be used for the amplification of signals from musical instruments with electromagnetic pickups. Use the device only as described in this user manual. Any other use or use under other operating conditions is considered to be improper and may result in personal injury or property damage. No liability will be assumed for damages resulting from improper use.
Safety instructions DANGER! Electric shock caused by short-circuit Always use proper ready-made insulated mains cabling (power cord) with a protective contact plug. Do not modify the mains cable or the plug. Failure to do so could result in electric shock/death or fire. If in doubt, seek advice from a registered electrician. CAUTION! Possible hearing damage The device can produce volume levels that may cause temporary or permanent hearing impairment.
Safety instructions NOTICE! Power supply Before connecting the device, ensure that the input voltage (AC outlet) matches the voltage rating of the device 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 occur and when it is unused for long periods of time to reduce the risk of electric shock or fire.
Features 3 Features This powerful bass head is characterized by the following special features: n n n n n n n n n 12 Block-300B Bass Head Compact, lightweight design Output power: 300 watt @ 4 Ω Class-D ICE power amp 5-band equalizer D.I. output with pre / post & lift / ground switch Input sensitivity switchable for active or passive basses Line input with volume control for rehearsing Headphones output Gigbag optionally available (item no.
Installation and starting up 4 Installation and starting up Unpack and check carefully there is no transportation damage before using the unit. Keep the equipment packaging. To fully protect the product against 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 device is off. Use the shortest possible high-quality cables for all connections.
Connections and operating elements 5 Connections and operating elements Front panel ö # + 14 Block-300B Bass Head $ * ) % & ( '
Connections and operating elements 1 [INPUT] | preamp volume control. If the [ CLIP] LED lights up red, this control must be turned counter-clockwise until the LED turns green again. If some EQ band levels have subsequently been raised, re-adjusting the [INPUT] control may be necessary. 2 [CLIP] | The LED lights up green when the device is turned on. It lights up red when the signal is clipping. Then turn the [INPUT] control counter-clockwise until the LED turns green again.
Connections and operating elements Rear panel , - .
Connections and operating elements 11 [POWER] | IEC chassis plug for connecting the mains cable with fuse holder 12 [D.I.] | balanced direct-output with MIC level for connection to a mixer, directly to a PA system or for recording 13 [SPEAKER OUT] | speaker output (Speaker Twist) for connecting suitable speaker boxes. The overall impedance of the connected load must not fall below 4 Ω. 14 Housing fan 15 [PRE/POST] | this switch determines where the DI signal is tapped.
Technical specifications 6 Technical specifications Amp class Class-D ICE Input impedance High 1,5 MΩ Low 32 kΩ Line 60 kΩ Output impedance D.I. 470 Ω (balanced) Frequency bands Bass 50 Hz, ± 10 dB Lower mids 180 Hz, ± 10 dB Mids 660 Hz, ± 10 dB Upper mids 3 kHz, ± 10 dB Treble 12.5 kHz, ± 10 dB Output power Speaker max. 300 W , 4 Ω minimum load Input connections Power supply IEC chassis plug C14 Instrument 1 × 1/4" jack socket Line 1 × 3.
Technical specifications Direct out 1 × XLR panel plug, 3-pin Headphones 1 × 3.5 mm jack socket Signal-to-noise ratio > 80 dB (A-weighted) Total harmonic distortion (THD) < 0.5 % Power consumption 390 W Supply voltage 100 - 240 V Fuse 5 mm × 20 mm, 4 A, 250 V, slow-blow Dimensions (W × H × D) 200 mm × 80 mm × 200 mm Weight 1.
Technical specifications Further information Gigbag optional (item no.
Plug and connection assignment 7 Plug and connection assignment Introduction 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.
Plug and connection assignment 1/4" TS phone plug (mono, unbalanced) 1 Signal 2 Ground, shielding 1 Signal (in phase, +) 2 Signal (out of phase, –) 3 Ground 1 Signal (left) 2 Signal (right) 3 Ground, shielding 1/4" TRS phone plug (mono, bal‐ anced) Three-pole 1/8" mini phone jack (stereo, unbalanced) 22 Block-300B Bass Head
Plug and connection assignment XLR plug (balanced) 1 Ground, shielding 2 Signal (in phase, +) 3 Signal (out of phase, –) 4 Shielding on plug housing (option) Block-300B Bass Head 23
Protecting the environment 8 Protecting the environment Disposal of the packaging mate‐ rial For the transport and protective packaging, environmentally friendly materials have been chosen that can be supplied to normal recycling. Ensure that plastic bags, packaging, etc. are properly disposed of. Do not just dispose of these materials with your normal household waste, but make sure that they are collected for recycling. Please follow the notes and markings on the packaging.
Notes Block-300B Bass Head 25
Notes 26 Block-300B Bass Head
Musikhaus Thomann · Hans-Thomann-Straße 1 · 96138 Burgebrach · Germany · www.thomann.
