HPA B 300 User manual

Owner’s Manual
B300
B1802
B 300
B 600
B 900
B 1200
B 1500
B 902
B 1202
B 1802

WARNING

1
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Introduction ………………………………………………………… 2
Features ……………………………………………………………… 3
Front Panel Controls ………………………………………………… 4
Rear Panel Controls ………………………………………………… 5
Protection ……………….…………………………………………… 7
Setup ………………………………………………………………… 8
Speaker Connections ….....….…………………………………… 9
Wiring ………………………………………………………………… 12
Specifications ……………………………………………………… 13
Black Diagrams ....………………………………………………… 14
Table of Contents
Table of Contents

2
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Introduction
Welcome.
Congratulation and thank you for the purchasing B Series, a state-of-the-art professional
amplifier.
These amplifier are designed to provide a big impact in sound reproduction and to
produce the best and highest quality audio at an affordable price. We wish you great
enjoyment and satisfaction when using your amplifier, whether you are an installation,
or reinforcement engineer.
Unpacking and Installation
Although it is neither complicated to install nor difficult to operate your amplifier, a few
minutes of your time is required to read this manual for a properly wired installation
and becoming familiar with its features and how to use them. Please take a great care
in unpacking your set and do not discard the carton and other packing materials. They
may be needed when moving your set and are required if it ever becomes necessary to
return your set for service. Never place the unit near radiator, in front of heating vents,
to direct sun light, in excessive humid or dusty location to avoid damages and to guar-
anty a long reliable use. Connect your unit with the system components according to
the description on the following pages.
B1500
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
PROFESSIONAL AMPLIFIER
Introduction

3
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Features
HPA B-Series amplifier delivers the following power ratings.
B 300 2 x 100 Watts at 8 ohm, 2 x 150 Watts at 4 ohm
B 600 2 x 200 Watts at 8 ohm, 2 x 300 Watts at 4 ohm
B 900 2 x 300 Watts at 8 ohm, 2 x 450 Watts at 4 ohm
B 1200 2 x 400 Watts at 8 ohm, 2 x 600 Watts at 4 ohm
B 1500 2 x 500 Watts at 8 ohm, 2 x 750 Watts at 4 ohm
B 902 2 x 200 Watts at 8 ohm, 2 x 300 Watts at 4 ohm and 2 x 450 Watts at 2 ohm
B 1202 2 x 300 Watts at 8 ohm, 2 x 450 Watts at 4 ohm and 2 x 600 Watts at 2 ohm
B1802 2 x 400 Watts at 8 ohm, 2 x 600 Watts at 4 ohm and 2 x 900 Watts at 2 ohm
2-channel, parallel or bridged mono operating modes for flexible application 300
Watts for B 300, 600 Watts for B 600, 900 Watts for B 900 and B 902,1200 Watts
for B 1200 and B 1202, 1500 Watts for B 1500 and 1800 Watts for B 1802.
Independent input level controls for each channel allow precision adjustments.
Precise signal and clip LED indicators to monitor performance, allow you to correct
for overloading (clipping) condition.
One-tunnel and two temperature-sensitivity forced-air cooling system to maintain a
low temperature working station.
Balanced XLR or balanced 1/4-inch TRS Combination input connector for each
channel.
5-way output binding posts or Speaker connectors enable secure operation.
High-current toroidal transformer for absolute reliability.
Independent DC thermal and overload protection on each channel automatically pro-
tects amplifier and speaker.
The B series can be mounted in any standard 19” rack.
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Features

4
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Front Panel Controls
1. Rack Mounting Ears
Two front panel mounting holes are provided
on each mounting ear.
2. Fan Vent
Cool air is flowed through the front fan filters,
reducing the temperature of the inside compo-
nents while forcing the heat out the rear vents.
Never block these vents and keep them clean at
all time.
3. AC Power Switch
This switch controls the units main power.
4. Signal Indicators
These green LED will illuminate to indicate
that a signal is present at the amplifier input,
and that the signal is being amplified.
5. Clip Indicators
These yellow LED will illuminate at the clip-
ping threshold. If it lights frequently, you maybe
overloading the HPA B-Series and a distorted
signal is probably being output. Under heavy
clipping activity lower the channel gain controls
to reduce the risk of damage to your speakers
and amplifier.
6. Active Indicators
These blue LED indicate that AC power is
connected and the amplifier is turned on.
7. Protect Indicators
These red LED indicate that the channel is in
Protect mode. When the channel goes into pro-
tect mode all output for that channel will turn off
by output relay. The protect LED will light when
B1802
1 3
4
2 1
8
overheating or other severe problem occur. This
is to protect any speakers connected to the
channel. These LED light for approximately five
seconds whenever the B Series is powered on
and to fade slowly when the amplifier is pow-
ered off. It is normal.
8. Channel input level control
These two 21-position detented controls
adjust input level for their respective amplifier
channels. In Bridged Mono Mode, only channel
1 input level control are used to adjust signal
level. In Parallel Mode, both input level control
are used to adjust signal level for their respec-
tive amplifier channels. At their fully counter-
clockwise position, the signal is attenuated by
more than 80dB. At their fully clockwise posi-
tion, the signal is at unity gain. When 0 dBu of
signal arrives at the input jacks and the Channel
input level controls are set to their fully clock-
wise position, the B Series delivers full power
output.
9. Fan
This is a variable speed cooling fan. Cool-
ing air enters the amplifier through the fan
ports located on front of the amplifier chassis,
Be sure not to block these ports when install-
ing the amplifier or other associated equip-
ment.
Front Panel Controls
5
7 6 9

5
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Rear Panel Controls
PROFESSIONAL AMPLIFIER
DESIGNED AND ENGINEERED IN KOREA
INPUT
INPUT
CONNECT 1
CONNECT 2
BRIDGE
(min 4 )
STEREO
BRIDGED PARALLEL
1 3
1. Input connectors
Connect the input source to these electronic
balanced Combination connectors using either
XLR or 1/4” TRS plugs. The 1/4” TRS and XLR
plug configured as follows : Pin 2 (Tip) hot, Pin
3 (Ring) cold, and Pin 1 (Sleeve) ground. We
recommend the use of balanced three-con-
ductor cabling wherever possible. Unbalanced
two-conductor 1/4” plugs can also be inserted
into these inputs, but you will get better signal
quality and less outside noise and hum if you
use balanced lines. Stereo signal should be
connected to both the Channel 1 and Channel
2 input jacks ; however ; when operating the B
Series in Bridged Mono or Parallel modes, use
the Channel 1 input jack only.
2. Bridge / Stereo / Parallel switch
This switch changes the amplifier operating
mode from either stereo or mono bridged or
parallel. You can place this switch in “STEREO”
position (center) for normal stereo operation.
When placed in “PARALLEL” position, the chan-
nel 1 input signal is routed to the power ampli-
fier of both channel. When placed “BRIDGED”
position, the channel 1 input signal only is
routed to both amplifiers again. In this mode the
channel 2 input is ignored.
3. 5-way Binding Post
Connect each channel of the B Series to
4 ohms or 8 ohms loudspeakers.Two pairs
of 5-way binding posts are provided for each
Rear Panel Controls
PROFESSIONAL AMPLIFIER
DESIGNED AND ENGINEERED IN KOREA
INPUT
INPUT
CONNECT 1
CONNECT 2
BRIDGE
(min 4 )
STEREO
BRIDGED PARALLEL
CIRCUIT
BREAKER
7
1
2
2
4
3 4 5
6
7
[ B 300 / B 600 / B 900 ]
[ B 1200 / B 1500 / B 902 / B 1202 / B 1802 ]

6
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
channel, so that paralleling of speakers is pos-
sible.Connection to the binding posts can be
made with bare wire, banana plugs, or spade
lug terminations. Make connections to both the
Channel 1 and Channel 2 terminals for Stereo or
Parallel Mode, or a single connection across the
red terminals only of Channel 1 and Channel 2
for Bridged Mono Mode.
4. Speakon output connectors
You can use these to connect each channel
of B Series to 8 ohms or 4 ohms loudspeakers.
Using Speakon speaker cables, make con-
nections to both the channel 1 and channel 2
connectots for Stereo or Parallel Mode, or to
the Bridged mode connector for Bridged Mono
Mode.
5. Circuit breaker
The breaker acts in place of common dis-
cardable fuses. This circuit breaker will trip if
there is a fault with the main voltage or if maxi-
mum output is exceeded. Simply depress the
circuit breaker and power up the unit again.
6. AC input
( B 1200 / B 1500 / B 902 / B 1202 / B 1802)
IEC connector for AC power cable. Con-
nect the supplied heavy-gauge 3-pin IEC power
cable.
7. AC inlet
(B 300 / B 600 / B 900)
This Ac intel allows replacing fuse conven-
iently please make sure the value of fuse before
replacement.
Rear Panel Controls

7
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Protection
Every model in the B Series incorporates pro-
tection features. The HPA B-Series front panel
Protection LED indicates the activity of the relay
speaker connection circuitry in each channel.
When the protection LED turn on, this circuitry
is active, and all connected speakers are muted.
Initial power-up ; For approximately five sec-
onds after initial power-up, the protection
circuitry is activated and the speaker outputs
are muted. If everything is operating normally,
you will hear an audible click at the conclusion
of this brief period, as the protection circuitry is
deactivated and the B Series begins delivering
signal to connected speakers. It is normal for
the Protection LED to fade gradually after the
amplifier is powered off.
Thermal Protection ; Abnormally high heat sink
temperatures will engage the Protect circuitry
for the overheating channel only. An output relay
disconnects the speakers until normal tem-
perature range is restored. During this time, the
Protect LED will light.
To guard against this problem, make sure the
B Series receives adequate ventilation on all
sides and that both the front and rear panels are
unobstructed. If the power transformer gets too
hot, its thermal switch will disconnect all of the
secondary power and disconnect both channel
outputs.
Short circuit ; If output is shorted due to faulty
wiring, the thermal circuitry will automatically
protect the amplifier. If this will occur, the load
will be disconnected by thermal protection cir-
cuitry (also output relay opens).
DC Voltage Protection ; If an amplifier channel
detects DC voltage at speaker output, the out-
put relay immediately open to prevent speaker
damage.
Subsonic Frequency Protection ; Built-in High
Pass Filter provides subsonic frequency protec-
tion for each channel.
Current limiting Protection ; At the amplifier’s
full power limit, or clipping point, the limiter
circuitry will be activated. This is indicated by
illumination of the Clip LED. The channel gain
is automatically reduced, protecting the speak-
ers from the high power. This circuitry may be
activated by uncontrolled feedback, oscilla-
tions, improper equipment gain setting. And this
circuitry is virtually transparent in operation and
full signal bandwidth is maintained.
Any time the Protection LED lights up (except
for initial power-up during approximately five
seconds), there is reason to be concerned. If
this occurs, turn the amplifier off immediately
and check carefully all wiring and external
equipments in order to locate and correct the
condition.
Protection

8
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Setup
Mode Select
Stereo Mode
In stereo mode, both channels operate inde-
pendently, with their input gain controls. Signal
at channel 1’s input produces output at channel
1, while signal at channel 2’s input produces
output at channel 2’s output.
Parallel Mode
When set to Parallel mode, a signal applied to
channel 1’s input will be amplified and appear
at outputs for both channel 1 & 2. With set to
parallel. The parallel mode is well-suited for ap-
plications in which driving two speakers with the
same signal but with separate amplification.
Bridged Mono Mode
Bridged mono mode straps both amplifier
channels together to make a very powerful,
single-channel monaural amplifier. One channel
”pushes” and the other channel “pulls” equally,
doubling the power over that of either chan-
nel alone. Therefore the voltage is doubled, the
peak power is quadrupled, and program power
is roughly three times as high as that of the indi-
vidual channel. Signal is applied to the channel
1 input only and channel 1 input gain control is
used to adjust signal level. The input gain con-
trol belonging to channel 2 are not used.
Note : See speaker connections in detail in
the following pages.
Use extreme caution when operating the ampli-
fier in Bridged Mono Mode. Never ground either
side of the speaker cable when the amplifier is in
Bridged Mono Mode ; the speaker load must “
float “ away from the amplifier chassis.
Setup

9
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Speaker Connections
Speaker Connections
Speakers can be connected to the amplifier in three ways, as shown below. Note that speaker
impedance will vary according to the connection method and the number of speakers. Please
be sure that your speaker’s impedance is not less than the relev ant minimum value indicated
below.
Stereo Mode
Set the Mode switch to STEREO to use the unit as a stereo amplifier. The volume controls on
the front panel (A and B) let you control the volume of each channel independently.
5-way binding post
or
or
Speakon connector
B
A
B
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 2+
SPK- to PIN 2-
Minimum speaker impedance:
B 300 / B 600 / B 900 / B 1200 / B 1500 : 4Ω
B 902 / B 1202 / B 1802 : 2Ω
WARNING:Use of Stereo mode with speaker load of less than 4 ohms in B 300 / B 600 / B 900 /
B 1200 / B 1500 and 2 ohms in B 902 / B 1202 / B 1802 can result in severe damage
to unit due execessive heat an current limiting and will void you warranty!

10
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
or
Speakon connector
B
A
or
B
or
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 1+
SPK- to PIN 1-
SPK+ to PIN 2+
SPK- to PIN 2-
5-way binding post
Parallel Mode
Set the Mode switch to PARALLEL to use the unit as a two-channnel mono amplifier. The vol-
ume controls on the front panel (A and B) let you control the volume of each channel independ-
ently.
Note:In this case, the loads for A and B are connected directly in the amplifier. Make sure
not to input any signal to the B terminal.
Minimum speaker impedance:
B 300 / B 600 / B 900 / B 1200 / B 1500 : 4Ω
B 902 / B 1202 / B 1802 : 2Ω
WARNING:Use of Parallel mode with speaker load of less than 4 ohms in B 300 / B 600 / B 900 /
B 1200 / B 1500 and 2 ohms in B 902 / B 1202 / B 1802 can result in severe damage
to unit due execessive heat an current limiting and will void you warranty!
Speaker Connections

11
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Bridged Mode (use as high-power mono amplifier)
Set the mode switch to BRIDGED to use the unit as a high power mono amplifier.The volume
control A on the front panel A lets you control the volume.
Note:In this case, the loads for A and B are directly connected in the amplifier. Make sure
not to input any signal to the B terminal.
5-way binding post
or Bridged/Mono
B
or
Speakon connector
SPK+ to PIN 1+
SPK- to PIN 2+
Minimum speaker impedance:
B 300 / B 600 / B 900 / B 1200 / B 1500 : 8Ω
B 902 / B 1202 / B 1802 : 4Ω
WARNING:Use of Bridged mode with speaker load of less than 8 ohms in B 300 / B 600 / B 900 /
B 1200 / B 1500 and 4 ohms in B 902 / B 1202 / B 1802 can result in severe damage
to unit due execessive heat an current limiting and will void you warranty!
Speaker Connections

12
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Wiring
These are several ways to interface the B series amplifier to support a variety of applications.
The B series features balanced inputs and outputs, so connecting balanced and unbalanced
signals is possibles.
Unbalances 1/4” Connector
Balances TRS 1/4” Connector
XLR Balanced Wiring Guide
Speakon® Output Connector
Wiring

13
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Necessary modifications are carried out without notice.
Specifications
Specifications
B 300 B 600 B 900 B 1200 B 1500 B 902 B 1202 B 1802
Output Power Stereo Both Channel Driven
8 ohms 100 W 200 W 280 W 300 W 450 W 180 W 300 W 400 W
4 ohms 150 W 300 W 450 W 600 W 700 W 300 W 450 W 600 W
2 ohms - - - - - 450 W 600 W 900 W
Output Power Bridged Mono
8 ohms 300 W 600 W 850 W 1200 W 1400 W 600 W 900 W 1200 W
4 ohms - - - - - 900 W 1200 W 1800 W
Signal to Noise Ratio
(20 Hz ~ 20k Hz) 95 dB 98 dB 98 dB 100 dB 100 dB 95 dB 102 dB 102 dB
Input sensitivity @4 ohms 4 dBu 4 dBu 4 dBu 4 dBu 4 dBu 4 dBu 4 dBu 4 dBu
Voltage Gain 26 dB 30 dB 30 dB 33 dB 33 dB 30 dB 30 dB 33 dB
Output Circuitry AB AB AB AB AB AB AB AB
Current Consumption 115Vac/230Vac
@ 1/8 power @4 ohms 1.2 A /0.5 A 3.1 A/ 1.5 A 4.1 A/2 A 5 A/2.4 A 7 A/3.6 A 3 A/15 A 4.1 A/2 A 6 A/3 A
@ 1/3 power @4 ohms 2.5 A/1.1 A 4.5 A/2.3 A 6 A/2.8 A 8 A/4 A 8.5 A/4.3 A 4.5 A/2.3 A 6 A/2.8 A 8.5A / 4.2 A
@ Rated power @4
ohms 3.5 A/1.7 A 7.2 A/3.5 A 9 A/4.7 A 12 A/6.1 A 15 A/7.8 A 7.5 A/3.7 A 9 A/4.7 A 14 A/ 6.8 A
Distortion
0.01% 0.01% 0.01% 0.01% 0.01% 0.01% 0.01% 0.01%
20 Hz-20k Hz Half
Power
1k Hz Rated Power 0.1% 0.1% 0.1% 0.1% 0.1% 0.1% 0.1% 0.1%
Frequency Response 0/-0.5dB ; 20Hz-20KHz
Input Impedance 15Kohm Unbalanced, 30Kohm Balanced
Input Clipping 22dBu (10Vrms)
Cooling Continuously variable speed, Front to rear
Connectors (each) Active balanced combo (XLR and 1/4” TRS common use)
Input
Output 5-way Binding post and Speakon
Control AC power switch, Channel 1 and 2 volume
Front
Rear Mode selector switch
Protection Short circuit, Thermal, Current limit, DC offset, Current inrush, Turn on /
Turn off muting
Power requirements 100 / 115 / 220 / 230 / 240Vac, 50/60Hz
Dimensions (W × H × D) 482 × 88 × 330mm
Net Weight 11.4Kg 14.1Kg 13Kg 14.5Kg 15.1Kg 14.2Kg 14Kg 15.6Kg

14
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Block diagrams
Block diagrams

15
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Block diagrams
Block diagrams

16
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802
Necessary modifications are carried out without notice.

17
B 300 / B 600 / B 900 / B 1200 / B 1500 / B 902 / B 1202 / B 1802