Laney
DB SERIES
USER MANUAL
MODEL :
DB150C
DB150H
DB300C
DB300H
DB400C
DB400H
Laney
FRONT PANEL FEATURES
DB150C & DB150H
2
15
16
14
TREBLE
-0+
GRAPHIC EQ
FET GAIN
5
VOLUME
4
6
1
1
LEVEL
3
2
POWER
7
2
5
4
6
LO OK HI
2
8
3
3
1
0
3
7
1
9
4
4
0
10
5
1
5
1
0
0
2
8
PREAMPS
DB150C
ACTIVE
5
5
-0+
4
6
4
6
1
9
3
3
2
7
7
2
0
10
NOISE
LIMIT GATE
FET TUBE
MID HI
2
8
2
8
3
3
EQ
1
9
1
9
4
4
PASSIVE
0
10
0
10
5
5
40Hz 80Hz 160Hz320Hz 650Hz 1k3Hz2k6Hz 5kHz 10kHz BALANCE
INPUT
PRE TUBE POST
PRESHAPE BASS
1
4
10 12
11
13
2
3
5
6
8 9
7
DB300C, DB300H, DB400C & DB400H
22
21
SUSTAIN
5
FET GAIN
5
TREBLE
-0+
GRAPHIC EQ
VOLUME
ATTACK
5
4
6
4
6
4
6
1
1
LEVEL
3
7
3
7
3
7
2
2
5
4
6
LO OK HI
2
8
2
8
2
8
3
3
ON
1
0
3
7
1
9
1
9
1
9
4
4
0
10
0
10
0
10
5
5
1
0
0
2
8
DB300H
COMPRESSOR
PREAMPS
5
5
5
-0+
1
4
0
6
4
0
6
4
6
1
9
3
3
3
2
7
7
7
2
NOISE
10
LIMIT GATE
0
ON
ON
MID HI
EQ
PAD
2
8
2
8
2
8
3
3
POWER
1
9
1
9
1
9
4
4
10
10
0
10
5
5
40Hz 80Hz 160Hz320Hz 650Hz 1k3Hz2k6Hz 5kHz 10kHz BALANCE
LEVEL
INPUT
PRE
TUBE
POST
PRESHAPE
BASS
20
19
17
18
INPUTS: Active Input: Low sensitivity input for instrument with active circuitry and high output.
Passive Input: High sensitivity input for instrument with normal output i.e. Passive.
1
2
PRE AMP MODE SELECTOR: Allows access to the different pre amp modes. Pre amp mode selection is achieved
by depressing the relevant switch. With no switches depressed the unit defaults to FET. To access both FET and Tube
pre amp sections depress both switches simultaneously.
TUBE PRE GAIN: Sets the level of drive in the Tube pre amp circuit. Should be used in conjunction with POST gain
control to achieve the desired sound. To achieve a clean sound set the PRE gain level low whilst setting the POST gain
relatively high. To achieve a saturated pre amp sound set the PRE gain high and the POST gain relatively low.
3
POST GAIN: Sets the level of post gain. See above for application.
4
5
PRE-SHAPE: Two factory set PRE-SHAPES are available. The MID PRE SHAPE produces an overall dip in the mid
frequency responce of the amp whilst at the same time boosting the low end of the amplifier. The HI PRE SHAPE
boosts the upper end frequency response of the amplifier. Both these PRE SHAPES can be selected simultaneously to
provide a third factory pre set. These pre shapes can be further modified by the units BASS, MID and GRAPHIC EQ
sections. PRE SHAPES are footswitchable on all models except DB150C and DB150H.
BASS: Controls the overall bass response of the amplifier
6
7
GRAPHIC: Nine band GRAPHIC. When switched out the EQ will be set in a flat frequency response. Voicings set via
the PRE-SHAPE can be further modified using the GRAPHIC.
BALANCE: Balances the pre amplifier output level when the GRAPHIC is assigned. Raising the slider increases the
output level of the GRAPHIC. Lowering the slider cuts the output of the GRAPHIC. BALANCE has no effect when
EQ is not selected
8
EQ: Enables the onboard GRAPHIC. The GRAPHIC can also be switched via a footswitch on all models. FS2
DB150C/DB150H FS4 footswitch. on all remaining models.
9
VOLUME: Sets the overall listening level of the amplifier
10
DB BASS MANUAL
Laney
FRONT PANEL FEATURES
DB150C & DB150H
3
15
16
14
TREBLE
-0+
GRAPHIC EQ
FET GAIN
5
VOLUME
4
6
1
1
LEVEL
3
2
POWER
7
2
5
4
6
LO OK HI
2
8
3
3
1
0
3
7
1
9
4
4
0
10
5
1
5
1
0
0
2
8
PREAMPS
DB150C
ACTIVE
5
5
-0+
4
6
4
6
1
9
3
3
2
7
7
2
0
10
NOISE
LIMIT GATE
FET TUBE
MID HI
2
8
2
8
3
3
EQ
1
9
1
9
4
4
PASSIVE
0
10
0
10
5
5
40Hz 80Hz 160Hz320Hz 650Hz 1k3Hz2k6Hz 5kHz 10kHz BALANCE
INPUT
PRE TUBE POST
PRESHAPE BASS
1
4
10 12
11
13
2
3
5
6
8 9
7
DB300C, DB300H, DB400C & DB400H
22
21
FET GAIN
5
SUSTAIN
5
ATTACK
5
TREBLE
-0+
GRAPHIC EQ
VOLUME
4
6
4
6
4
6
1
1
LEVEL
3
7
3
7
3
7
2
2
5
4
6
LO OK HI
2
8
2
8
2
8
3
3
ON
1
0
3
7
1
9
1
9
1
9
4
4
0
10
0
10
0
10
5
5
1
0
0
2
8
DB300H
COMPRESSOR
PREAMPS
5
5
5
-0+
1
4
0
6
4
0
6
4
6
1
9
3
3
3
2
7
7
7
2
NOISE
10
LIMIT GATE
0
ON
ON
MID HI
EQ
PAD
2
8
2
8
2
8
3
3
POWER
1
9
1
9
1
9
4
4
10
10
0
10
5
5
40Hz 80Hz 160Hz320Hz 650Hz 1k3Hz2k6Hz 5kHz 10kHz BALANCE
INPUT
PRE
TUBE
POST
LEVEL
PRESHAPE
BASS
20
19
17
18
LIMIT: Activates a fast attack compressor circuit. This is auto triggered by the output section, and prevent distortion
at high output levels.
11
12
NOISE GATE: When the amplifier is set for a high gain and high output volume; noise, hum and acoustic feedback
may become apparent. When selected (Pressed in) the noise reduction circuit is activated when playing ceases, greatly
reducing the unwanted noise. Note this is designed to be used at high gain and volme levels, use at low levels can
cause unwanted noise and result in premature signal cut off.
POWER: Illuminates when amplifier is switched on.
13
14
LEVEL INDICATORS: Indicates the strength of signal present in the pre-amplifier. If an ORANGE LED is
displayed the level of signal should be increased by means of the Pre-amp gains, using the appropriate gain controls. If
a GREEN LED is displayed the signal is at its optimum level. If a RED LED is displayed then the level present is too
high and should be adjusted accordingly.
FET GAIN: Adjusts the level of gain for the FET (solid state) section of the pre amp. This control is only active if the
FET pre amp selector is assigned or if both pre amp modes are selected simultaneously
15
TREBLE: Controls the HIGH level frequency content of the amplifier.
16
17
COMBINATION XLR/JACK INPUT: Allows for the connection of an instrument using either XLR connectors of
Jacks
PAD: Pad switch for selecting between ACTIVE and PASSIVE input sources.
ON: Switches the on board compressor on.
18
19
20
LEVEL: Controls the output level of the compressor when the compressor is switched on.
SUSTAIN: Controls the compression range and the length of sustain. Turning the control clockwise increases the level
of sustain.
21
22
ATTACK: Controls the envelope of the signal. Turning the control clockwise emphasizes the attack.
DB BASS MANUAL
Laney
REAR PANEL FEATURES
DB150C & DB150H
4
23
24
WARNING THIS EQUIPMENT MUST BE EARTHED.
MAXIMUIM POWER
CONSUMPTION 300 WATTS ~50 - 60 Hz.
SPEAKER OUTPUT
HORN
8P-86
CE
OFF
PIN -1 = GND.
PIN +1 = SIG.
SUPPLY VOLTAGE ~230V T1A
& FUSE RATING ~115V T2A
SERIAL No:
FX LOOP
FX LOOP
A
TOTAL LOAD OF NO LESS THAN 8 OHMS
CAN BE CONNECTED AT ANY ONE TIME.
PREAMP OUT
PRE EQ. POST EQ.
CAUTION
TO REDUCE THE RISK OF
FIRE HAZARD REPLACE FUSE WITH
SAME TYPE AND RATING ONLY.
SEND
SEND
DIRECT INJECT
ATTENTION
REMPLACER LE FUSIBLE
PAR LE MEME ET LE CALIBRE.
ATTENTION
DEBRANCHER
A
LA PRISE
CAUTION
PRE/POST
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
SECTEUR AVAVT D'OUVRIR.
EQ
REMOVE COVERS. NO USER SERVICABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
MADE IN THE UNITED KINGDOM BY BLT INDUSTRIES LTD.
WARNING
TO REDUCE THE RISK
OF FIRE OR ELECTRIC SHOCK DO
NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
RETURN
RETURN FOOTSWITCH
25
26
28
27
29 30 31
DB300C, DB300H, DB400C & DB400H
33
34
35
32
WARNING THIS EQUIPMENT MUST BE EARTHED.
PREAMP OUT
ELECTRONIC CROSSOVER
MAXIMUIM POWER
8P-8687
CONSUMPTION 500 WATTS ~50 - 60 Hz.
SPEAKER OUTPUT
HI
LEVEL
-0+
1
HI OUT
SPLIT
HORN
OFF
1
LO MID HI
2
2
3
3
CE
4
4
LO OUT
5
5
LO
POWER AMP IN
PIN -1
=
GND.
SUPPLY VOLTAGE ~230V T6.3A
& FUSE RATING ~115V T10A
PIN +1 = SIG.
SERIAL No:
FX LOOP
FX LOOP
POST EQ.
SEND
PRE EQ.
SEND
CAUTION TO REDUCE THE RISK OF
FIRE HAZARD REPLACE FUSE WITH
SAME TYPE AND RATING ONLY.
DIRECT INJECT
ATTENTION
REMPLACER LE FUSIBLE
PAR LE MEME ET LE CALIBRE.
ATTENTION DEBRANCHER LA PRISE
SECTEUR AVAVT D'OUVRIR.
A TOTAL LOAD OF NO LESS THAN 8 OHMS
CAN BE CONNECTED AT ANY ONE TIME
A
PRE/POST
EQ
CAUTIONTO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
WARNINGTO REDUCE THE RISK
REMOVE COVERS. NO USER SERVICABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
OF FIRE OR ELECTRIC SHOCK DO
NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
MADE IN THE UNITED KINGDOM BY BLT INDUSTRIES LTD.
RETURN
RETURN
FOOTSWITCH
36
HORN SWITCH: Activates the on board COMPRESSION DRIVER. Not present on DB150H.
23
24
SPEAKON OUTPUT: SPEAKON connector for connecting external speaker cabinet. Total minimum impedance of
enclosure connected to this socket must be no lower than 8 Ohm (4 Ohm DB400C/H) when used in conjunction with
another cabinet either connected to jack socket (25) or linked from the cabinet connected to the speakon connector. If
only a single enclosure is to be used the minimum impedance should be no lower than 4 Ohm. Not present on DB150C
25
26
JACK OUTPUT: JACK socket for connection of external speaker enclosure. See above.
PRE AMP OUT: Provides output to drive external power amplifier.
27
28
29
XLR DIRECT INJECT: XLR socket for output of low impedance balanced line signal. Provides signal for use with
external mixing desks or PA system
DI SELECT: Selects whether the signal sent to the XLR DIRECT INJECT is derived from a PRE EQ signal or a
POST EQ signal.
FX LOOP PRE EQ: SEND & RETURN jacks for connection of external effects. Effects units connected to this set
of send and return sockets receive a PRE EQ signal. Should be used in conjunction with any effect which is going to
radically alter the sound of the amplifier, such as Octave dividers, distortion pedals etc.
30
31
FX LOOP POST EQ: SEND & RETURN jacks for the connection of external effects. An effect unit(s) connected to
this set of send and return sockets will recieve a POST EQ signal. Should be used in conjunction with effects such as
chorus, flanger or any type of digital pedal.
FOOTSWITCH: Should be used for connecting the correct type of footswitch to allow the remote switching of the
following features. DB150C & DB150H, FS2 for switching of GRAPHIC and INPUT MODE.
DB300C/DB300H/DB400C/DB400H, FS5 for switching of INPUT MODE/PRE SHAPE/GRAPHIC and
COMPRESSOR
DB BASS MANUAL
Laney
REAR PANEL FEATURES
DB150C & DB150H
5
23
24
WARNING THIS EQUIPMENT MUST BE EARTHED.
MAXIMUIM POWER
CONSUMPTION 300 WATTS ~50 - 60 Hz.
SPEAKER OUTPUT
HORN
8P-86
CE
OFF
PIN -1 = GND.
PIN +1 = SIG.
SUPPLY VOLTAGE ~230V T1A
& FUSE RATING ~115V T2A
SERIAL No:
FX LOOP
FX LOOP
A
TOTAL LOAD OF NO LESS THAN 8 OHMS
CAN BE CONNECTED AT ANY ONE TIME.
PREAMP OUT
PRE EQ. POST EQ.
CAUTION
TO REDUCE THE RISK OF
FIRE HAZARD REPLACE FUSE WITH
SAME TYPE AND RATING ONLY.
SEND
SEND
DIRECT INJECT
ATTENTION
REMPLACER LE FUSIBLE
PAR LE MEME ET LE CALIBRE.
ATTENTION
DEBRANCHER
A
LA PRISE
CAUTION
PRE/POST
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
SECTEUR AVAVT D'OUVRIR.
EQ
REMOVE COVERS. NO USER SERVICABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
MADE IN THE UNITED KINGDOM BY BLT INDUSTRIES LTD.
WARNING
TO REDUCE THE RISK
OF FIRE OR ELECTRIC SHOCK DO
NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
RETURN
RETURN FOOTSWITCH
25
26
28
27
29 30 31
DB300C, DB300H, DB400C & DB400H
33
34
35
32
WARNING THIS EQUIPMENT MUST BE EARTHED.
PREAMP OUT
ELECTRONIC CROSSOVER
MAXIMUIM POWER
8P-8687
CONSUMPTION 500 WATTS ~50 - 60 Hz.
SPEAKER OUTPUT
HI
LEVEL
-0+
1
HI OUT
SPLIT
HORN
OFF
1
LO MID HI
2
2
3
3
CE
4
4
LO OUT
5
5
LO
POWER AMP IN
PIN -1
=
GND.
SUPPLY VOLTAGE ~230V T6.3A
& FUSE RATING ~115V T10A
PIN +1 = SIG.
SERIAL No:
FX LOOP
FX LOOP
POST EQ.
SEND
PRE EQ.
SEND
CAUTION TO REDUCE THE RISK OF
FIRE HAZARD REPLACE FUSE WITH
SAME TYPE AND RATING ONLY.
DIRECT INJECT
ATTENTION
REMPLACER LE FUSIBLE
PAR LE MEME ET LE CALIBRE.
ATTENTION DEBRANCHER LA PRISE
SECTEUR AVAVT D'OUVRIR.
A TOTAL LOAD OF NO LESS THAN 8 OHMS
CAN BE CONNECTED AT ANY ONE TIME
A
PRE/POST
EQ
CAUTIONTO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
WARNINGTO REDUCE THE RISK
REMOVE COVERS. NO USER SERVICABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
OF FIRE OR ELECTRIC SHOCK DO
NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
MADE IN THE UNITED KINGDOM BY BLT INDUSTRIES LTD.
RETURN
RETURN
FOOTSWITCH
36
HORN: Activates the on board COMPRESSION DRIVER. Not present on DB300/400H.
32
33
HI/LO SWITCH: When switched to the HI position the HORN runs at full level. When switched to LO the HORN
is attenuated down -6db.
PRE AMP OUT POWER AMP IN: PRE AMP OUT provides output to drive external power amplifier. This may be
used as an additional FX loop when used in conjunction with POWER AMP IN. POWER AMP IN provides an input
to the power amplifier for use as a slave amplifier.
34
35
ELECTRONIC CROSSOVER: The crossover consists of a HI OUT a LO OUT, a SPLIT function and a LEVEL
control. The LEVEL control determines the level of signal sent to either the HI or LO output. The SPLIT control sets
the frequency at which the crossover functions and the HI and LO outputs provide a signal to either the internal power
amp or an external power amplifier.
Lets look at the following example to gain an insight into how the crossover can be set up. Lets assume that you have a
DB400C and you wish to employ a 1x15 cabinet with a seperate power amplifier to handle the bottom end. To do this
you would first need to set the crossover frequency to LO. Using a straight Jack connector, connect the HI output to the
POWER AMP IN socket (34), This routes the HI frequency signal to the internal power amplifier which is
subsequently handled by the onboard speakers . Using a second jack connect the LO OUT socket to the input socket
of the external power amplifier connected to the 1x15 enclosurer. The DB400C will handle all the MID/HI frequencies
whilst the 1x15 will handle all the LO end.
To split the signal to allow a seperate 2 x 10" enclosure to handle the HI frequencies whist allowing the onboard
speaker to carry the remaining signal, patch the crossover as follows, SPLIT selector to HI, LO OUT connected to
POWER AMP IN, HI OUT to input of external power amplifier connected to 2 x 10" extension cab.
With nothing connected to the crossover patch bay, the unit defaults to full range regardless of where the SPLIT
function is set.
DB BASS MANUAL
Laney
REAR PANEL FEATURES
DB150C & DB150H
6
23
24
WARNING THIS EQUIPMENT MUST BE EARTHED.
MAXIMUIM POWER
CONSUMPTION 300 WATTS ~50 - 60 Hz.
SPEAKER OUTPUT
HORN
8P-86
CE
OFF
PIN -1 = GND.
PIN +1 = SIG.
SUPPLY VOLTAGE ~230V T1A
& FUSE RATING ~115V T2A
SERIAL No:
FX LOOP
FX LOOP
A
TOTAL LOAD OF NO LESS THAN 8 OHMS
CAN BE CONNECTED AT ANY ONE TIME.
PREAMP OUT
PRE EQ. POST EQ.
CAUTION
TO REDUCE THE RISK OF
FIRE HAZARD REPLACE FUSE WITH
SAME TYPE AND RATING ONLY.
SEND
SEND
DIRECT INJECT
ATTENTION
REMPLACER LE FUSIBLE
PAR LE MEME ET LE CALIBRE.
ATTENTION
DEBRANCHER
A
LA PRISE
CAUTION
PRE/POST
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
SECTEUR AVAVT D'OUVRIR.
EQ
REMOVE COVERS. NO USER SERVICABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
MADE IN THE UNITED KINGDOM BY BLT INDUSTRIES LTD.
WARNING
TO REDUCE THE RISK
OF FIRE OR ELECTRIC SHOCK DO
NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
RETURN
RETURN FOOTSWITCH
25
26
28
27
29 30 31
DB300C, DB300H, DB400C & DB400H
33
34
35
32
WARNING THIS EQUIPMENT MUST BE EARTHED.
PREAMP OUT
ELECTRONIC CROSSOVER
MAXIMUIM POWER
8P-8687
CONSUMPTION 500 WATTS ~50 - 60 Hz.
SPEAKER OUTPUT
HI
LEVEL
-0+
1
HI OUT
SPLIT
HORN
OFF
1
LO MID HI
2
2
3
3
CE
4
4
LO OUT
5
5
LO
POWER AMP IN
PIN -1
=
GND.
SUPPLY VOLTAGE ~230V T6.3A
& FUSE RATING ~115V T10A
PIN +1 = SIG.
SERIAL No:
FX LOOP
FX LOOP
POST EQ.
SEND
PRE EQ.
SEND
CAUTION TO REDUCE THE RISK OF
FIRE HAZARD REPLACE FUSE WITH
SAME TYPE AND RATING ONLY.
DIRECT INJECT
ATTENTION
REMPLACER LE FUSIBLE
PAR LE MEME ET LE CALIBRE.
ATTENTION DEBRANCHER LA PRISE
SECTEUR AVAVT D'OUVRIR.
A TOTAL LOAD OF NO LESS THAN 8 OHMS
CAN BE CONNECTED AT ANY ONE TIME
A
PRE/POST
EQ
CAUTIONTO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT
WARNINGTO REDUCE THE RISK
REMOVE COVERS. NO USER SERVICABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
OF FIRE OR ELECTRIC SHOCK DO
NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE.
MADE IN THE UNITED KINGDOM BY BLT INDUSTRIES LTD.
RETURN
RETURN
FOOTSWITCH
36
SPEAKER OUTPUT JACKS: JACKconnectors for connecting external speaker cabinet . Total minimum impedance
of enclosure connected to this socket must be no lower than 8 Ohm (4 Ohm DB400C/H) when used in conjunction with
onboard speaker, another cabinet either connected to jack socket (25) or linked from the cabinet connected to the
speakon connector. If only a single enclosure is to be used the minimum impedance should be no lower than 4 Ohm (2
Ohm DB400H)
36
BLT Industries Ltd.,
Newlyn Road,
Cradley Heath,
West Midlands.
B64 6BE.
Tel: (0044) (0)1384 633821
Fax: (0044) (0)1384 639186
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