thomann Harley Benton Block-300B User manual

Block-300B
bass head
user manual

Musikhaus Thomann
Thomann GmbH
Hans-Thomann-Straße 1
96138 Burgebrach
Germany
Telephone: [phone]
E-mail: [email protected]
Internet: www.thomann.de
19.01.2021, ID: 497726

Table of contents
1 General information................................................................................................................................. 4
1.1 Further information........................................................................................................................... 5
1.2 Notational conventions.................................................................................................................... 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 specications....................................................................................................................... 21
7 Plug and connection assignment.................................................................................................... 24
8 Protecting the environment.............................................................................................................. 27
Table of contents
Block-300B
3

1 General information
This manual contains important instructions for the safe operation of the unit. Read and follow
the safety instructions 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 this manual.
Our products are subject to a process of continuous development. Thus, they are subject to
change.
General information
bass head
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1.1 Further information
On our website (www.thomann.de) you will nd lots of further information and details on the
following points:
Download This manual is also available as PDF le for you to download.
Keyword search Use the search function in the electronic version to nd the topics of
interest for you quickly.
Online guides Our online guides provide detailed information on technical basics
and terms.
Personal consultation For personal consultation please contact our technical hotline.
Service If you have any problems with the device the customer service will
gladly assist you.
General information
Block-300B
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1.2 Notational conventions
This manual uses the following notational conventions:
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 nd an overview of the meaning of symbols and signal words that are
used in this manual.
Letterings
General information
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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.
CAUTION! This combination 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 dangerous situation that can result in material and
environmental damage if it is not avoided.
Warning signs Type of danger
Warning – high-voltage.
Warning – danger zone.
General information
Block-300B
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2 Safety instructions
This device is intended to be used for the amplication 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.
This device may be used only by persons with sucient physical, sensorial, and intellectual
abilities and having corresponding knowledge and experience. Other persons may use this
device only if they are supervised or instructed by a person who is responsible for their safety.
Intended use
Safety instructions
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DANGER!
Danger for children
Ensure that plastic bags, packaging, etc. are disposed of properly and are not
within reach of babies and young children. Choking hazard!
Ensure that children do not detach any small parts (e.g. knobs or the 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 where high voltages may be present. Never
remove any covers.
There are no user-serviceable parts inside.
Do not use the device if covers, protectors or optical components are missing or
damaged.
Safety
Safety instructions
Block-300B
9

DANGER!
Electric shock caused by short-circuit
Always use proper ready-made insulated mains cabling (power cord) with a pro‐
tective contact plug. Do not modify the mains cable or the plug. Failure to do so
could result in electric shock/death or re. If in doubt, seek advice 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 levels that seem to
be uncritical can cause hearing damage.
Decrease the volume level immediately if you experience ringing in your ears or
hearing impairment. If this is not possible, keep a greater distance or use su‐
cient ear protectors.
Safety instructions
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NOTICE!
Risk of re
Do not block areas of ventilation. Do not install the device near any direct heat
source. Keep the device away from naked ames.
NOTICE!
Operating conditions
This device has been designed for indoor use only. To prevent damage, never
expose the device to any liquid or moisture. Avoid direct sunlight, heavy dirt, and
strong vibrations.
Safety instructions
Block-300B
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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 re.
NOTICE!
Possible staining
The plasticiser contained in the rubber feet of this product may possibly react
with the coating of your parquet, linoleum, laminate or PVC oor and after some
time cause permanent dark stains.
In case of doubt, do not put the rubber feet directly on the oor, but use felt-pad
oor protectors or a carpet.
Safety instructions
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3 Features
This powerful bass head is characterized by the following special features:
nCompact, lightweight design
nOutput power: 300 watt @ 4 Ω
nClass-D ICE power amp
n5-band equalizer
nD.I. output with pre / post & lift / ground switch
nInput sensitivity switchable for active or passive basses
nLine input with volume control for rehearsing
nHeadphones output
nGigbag optionally available (item no. 194575)
Features
Block-300B
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4 Installation and starting up
Unpack and carefully check that there is no transportation damage before using the unit. Keep
the equipment packaging. To fully protect the device 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 o. Use the shortest possible high-quality cables for
all connections. Take care when running the cables to prevent tripping hazards.
Installation and starting up
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5 Connections and operating elements
Front panel
Connections and operating elements
Block-300B
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1[INPUT]
Preamp volume control. If the [CLIP] LED lights up red, this controller must be turned counter-clockwise until the LED
turns green again. If some EQ band levels have been changed, 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.
3[BASS] / [LO MID] / [MIDDLE] / [HI MID] / [TREBLE]
Controls for raising or attenuating the bass / lower mids / mids / upper mids / treble
4[OUTPUT]
Master volume control
5
3.5 mm jack output to connect head phones
6
3.5 mm jack input for connecting a line level player, e.g. MP3 player or mobile phone
Connections and operating elements
bass head
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7[LINE]
Volume control for the input
8[EQ]
Enables or disables the EQ. Slider control is only possible if the EQ is enabled.
9[HI/LOW]
Switch for the sensitivity and impedance of the [IN]. When using passive instruments, this switch should be in the [HI]
position (not pressed), otherwise the input level is not sucient to fully drive the amplier. When using active instru‐
ments, this switch should be in the [LOW] position (pressed), otherwise clipping and thus a preamp overload can
easily occur, resulting in very disturbing-sounding distortions.
10 [IN]
1/4" jack socket to connect an electric bass
Connections and operating elements
Block-300B
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Rear panel
Connections and operating elements
bass head
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11 [POWER]
IEC chassis plug for mains connection 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]
Speakon speaker output 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. In [PRE] position, the signal is tapped before tone control and
compressor, in [POST] position behind it.
Connections and operating elements
Block-300B
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16 [LIFT/GND]
This switch disconnects or connects the ground potential of the DI output and the device ground. In [LIFT] position
(released), the device ground is disconnected. This can possibly eliminate noise caused by ground loops, that may
occur when connecting the device to other grounded equipment. In [ GND] position (pressed), the device ground is
connected.
17 Mains switch to turn the device on and o
Connections and operating elements
bass head
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