6. Exploded View & Mechanical Parts List.......................................11
7. Electrical Parts List............................................................................13
Page 3
1. Introduction
˙ 1.5U 1/2 rack, stereo high power amplifier.
˙ Fantastic audio quality even with extremely high volume levels.
˙ Solid and durable, can be mounted into a cabinet.
˙ User-controllable clip limiter.
˙ 2×480 Watts on 4 ohms (EIAJ)
˙ Balanced XLR inputs and 1/4”TRS jack to ensure noiseless long wiring.
˙ Neutrik Speak-on connectors for output.
˙ Front panel LED indicators for signal, limit and clip.
˙ Accurate gain control.
˙ Independent thermal overload protection on each channel automatically
protects amplifier and speakers.
˙ Single channel over-heat protection.
- 1 -
Page 4
2. Specification
MODEL
20Hz 20KHz@0.1%THD, Stereo Mode
8 ohms per channel(EIAJ)
4 ohms per channel(EIAJ)
4 ohms per channel(RMS)
Input Sensitivity @4 ohms
Controls
Indicators (per channel)
Connectors of each channel
A500.2 DRAGONFLY
260W
480W
245W (at THD 1%)
+3dBu
FRONT: Power switch, CH1 & CH2 LEVEL knobs
REAR: CH1 & CH2 LIMITER
Power-On: Green LED
Clip: Red LED
Limit: Yellow LED
Signal: Green LED
Input: COMBO connector
Output: NEUTRIK Speak-on connector
Power Supply
Dimension
Net Weight
190-240 Vac~50Hz / 95-120Vac~60Hz
314W x 208.5D x 66.6H mm / 12.4" x 8.2" x 2.6"
3.85 kg (8.49lb)
- 2 -
Page 5
3. Schematic Diagram
D
8
C
CLIP
SIG
R22
30R
SIG
CLIP
R23
30R
B
A
7654321
CN4
C11
LED5
C13
R26
56pF/50 cer
1
2
CON2
GND1
R6
10K
56pF/50 cer
R5
CH1-OUT
U2
GR
R15
82K
VTL5C2
10K
270R
LIMITER
1
3
2
R25
10K
41
7
5
6
LED2
RED
R21
82R
R19
180R
123
CN8
LED1
YEL
GND1-1GND1
12345
CN7
U5:1
NJM4580L
R27
10K
GND1
CN3
23
U1:2
NJM4580L
C12
56pF/50 cer
R9
10K
GND1
LED6
GND1-1
4
CON4
CON5
C14
R29
82K
56pF/50 cer
12345
CON5
U4
VTL5C2
R14
10K
10K
R12
GR
R17
270R
LIMITER
7
5
6
R28
10K
41
7
5
6
LED4
RED
R24
82R
GND1-1
R20
180R
LED3
YEL
U5:2
NJM4580L
R30
10K
GND1
1
2
CN5
CON2
GND1
123
CN6
23
CH2-OUT
U3:2
NJM4580L
R13
10K
GND1
15V1
84
CON3
-15V1
GND1
C21
10u/25V
C22
10u/25V
U5:3
NJM4580L
C19
104P
C20
104P
GND1
VR1
A100K
C9
47uF/25V
1
C6
R4
100pF/50 cer
R1
C1
22uF/50V
D
10K
2
15K
CN1
U1:1
3
R2
15K
123
NJM4580L
R3
C2
CON3
22uF/50V
10K
C5
CH1-IN
CH1 GAIN
C7
GND1
GND1
100pF/50 cer
GND1
C10
47uF/25V
1
R8
10K
100pF/50 cer
2
R7
15K
C3
22uF/50V
CN2
C
VR2
U3:1
NJM4580L
R11
10K
3
C8
R10
15K
C4
22uF/50V
123
CON3
CH2-IN
A100K
100pF/50 cer
GND1
GND1
GND1
GND1
CH2 GAIN
B
84
U3:3
NJM4580L
C17
104P
C18
84
U1:3
NJM4580L
C15
104P
C16
104P
104P
12345678
A
- 3 -
Page 6
D
4
321
C
B
A
X1X2X3
CN1
CN5
12345
CN9
1
2
123
CON3
SW1: 1
SW1: 2
6
CN-BAL-COMBI
3
SW PS-22E85L
4
5
6
P
SW PS-22E85L
CH1
CON4
4
5
6
SW3: 2
1
SW3: 1
P
SW PS-22E85L
2
3
X1X2X3
SW PS-22E85L
CN2
CN6
12345
123
CON3
6
CN-BAL-COMBI
CH2
123
4
1234
D
C
B
A
- 4 -
Page 7
D
4
321
C
B
A
4
CN1
1
1
2
CN5
CON2
CN6
CH1_SP+
CN-SP
2-
1+
2+
1-
2
2
3
1
CON2
CH1_SP-
1
2
CN7
CH2_SP+
1
CON2
4
CN2
CN8
CN-SP
2-
1+
2+
1-
2
2
3
1
CON2
CH2_SP-
1234
D
C
B
A
- 5 -
Page 8
7654321
8
+25C
10
GND
11
GND
L1
L2
ferrite bead
U6
4
N1-
5
N1+
2
SGND1
7
OSC
6
MODE
SGND2
8
N2+
9
N2-
TDA8929
C105
100U/35V LOW ESR
+25C
GND
-25C
C106
100U/35V LOW ESR
DIATEMP
12
-25C
VDD13VDD2
SW
REL
ENA
DIACUR
STABEX
STABINT
ENA2
REL2
SW2
VSS11VSS2
100N/100V
FB
FB2
C46
20
24
23
21
22
15
18
19
16
14
13
17
C45
100N/100V
100N/100V
-25C
C47
C48
220N
GND
GND
C8
100N/100V
C9
100N/100V
C10
100N/100V
C59
1N
TE2
D
C
B
TE3
+VCC
TE4
GND
TE5
-VCC
GND
AF IN
L7
WB0610-3.0T
C1
100N/100V
C2
100N/100V
L8
WB0610-3.0T
TE1
-25C
C11
100N/100V
C12
100N/100V
C20
10U/16V
C22
10U/16V
R31
27K
MUTE
C23
2200U/35V
C24
2200U/35V
C34
220N
R26
5K60
R27
5K60
C28
560P
+25
ferrite bead
C14
2200U/35V LOW ESR
C15
2200U/35V LOW ESR
-25
fbla
sla
rla
ela
dia1
-25C
C3
GNDCASE
10N(NPO)
-25
-25
R28 1K0
R35
1K0
C49
220N
C54
220N
+25
13
17
SW2
16
REL2
14
ENA2
9
VSTAB
15
POWUP
3
DIAG
4
ENA1
2
REL1
1
SW1
U9
17
SW2
16
REL2
14
ENA2
9
VSTAB
15
POWUP
3
DIAG
4
ENA1
2
REL1
1
SW1
TDA8927
BOOT2
VDD15VDD2
OUT2
OUT1
BOOT1
VSS18VSS2
U8
TDA8927
10
-25
+25
13
BOOT2
VDD15VDD2
OUT2
OUT1
BOOT1
VSS18VSS2
10
-25
C43
22N
12
11
7
6
C42
22N
12
11
7
6
C40
22N
C41
22N
+25 -25
C29
560P
R39
5R60
R41
5R60
C32
560P
+25 -25
+25 -25
C36
560P
R43
5R60
R44
5R60
C37
560P
+25 -25
C30
560P
R40
5R60
TWKC-22UH
TWKC-22UH
R42
5R60
C33
560P
C38
560P
R45
5R60
L5
TWKC-22UH
L6
TWKC-22UH
R46
5R60
C39
560P
GNDGND
C151
C18
2N7 COG
470N MKT
R63
100R
L3
L4
L10
TWKC-22UH
Modify R65 22R/2W 20051213
L11
TWKC-22UH
R64
100R
C152
2N7 COG
GNDGND
GND
C153
2N7 COG
C26
R29
470N MKT
100R
L12
TWKC-22UH
L13
Modify R70 22R/2W 20051213
TWKC-22UH
R30
100R
C27
470N MKT
C154
2N7 COG
GNDGNDGND CASE
R68
REMOVE 20051213
47R0
R65
22R/2W
C21
470N MKT
GNDCASE
C50
0.1uF/100V
GND
GND
100N/100V
R66
REMOVE 20051213
47R0
C62
1N(NPO)
GND
R70
22R/2W
C64
1N(NPO)
C56
TE11
-OUT
R72
390/2W
ADD 20051213
C110
1N(NPO)
R71
390/2W
ADD 20051213
TE13
+OUT
C111
1N(NPO)
D
C
B
MUTE
+25C
GND
R1
56K
D8
ZD5.6
A
GND
C5
100N/100V
+25
C6
100N/100V
A
-25
C7
100N/100V
GND
C71
100N/100V
C72
100N/100V
C73
100N/100V
C60
100N/100V
C55
100N/100V
C61
100N/100V
C16
100N/100V
C63
100N/100V
C31
100N/100V
C44
100N/100V
C4
100N/100V
REMOVE 20051213
12345678
- 6 -
Page 9
D
C
B
A
V27NF
8
7654321
P2
C13
C24
L6
1uH/12A
V27NFB
C23
C22
17
L4E
1614
D12B
V27N
GND
P3
470N
2200U/25V
2200U/25V
2200U/25V
P
C12
470N
C21
2200U/25V
L5
1uH/12A
C20
2200U/25V
V27NY
C19
2200U/25V
1315
L4B
GND
LF20_13EED
L4D
911
L4C
LF20_13EED
LF20_13EED
1210
30CPQ150
D9B
30CPQ150
24
L4A
LF20_13EED
LF20_13EED
P
1234567
K2
V27N
123
CN4
GND
V15N
V15A
V15A
GND
C16
100N
C30
100U/25V
8
CON8
GND
V27NF
CON3
V15N
R10
2K2
C14
100N
C26
100U/25V
D5
GR
1234567
K3
8
CON8
P1
C11
R6
PWR_LED
R17
P
D12A
30CPQ150
470P/500V
T2
D4
270RR5270R
1
2
CN1
51K
R18
C3
2N2/400V
C2
2N2/400V
C39
2N2/400V
C38
2N2/400V
D9A
30CPQ150
C10
470P/500V
C41
R9
10R/30W
12
234
1
1N4148
CON2
51K
L2
D1
KBU8M
100N
8
10
131415
5
R13
150K
R14
150K
C7
470U/200V
C37
470U/200V
1uH/12A
L3
1uH/12A
C8
470U/200V
C36
470U/200V
17
7
TF20_13EED
M2
STW9N K90Z
1
2
T1
PE67100
3
4
R3
150K
R4
845K
R1
845K
D7
Q2
R8
6R80
D8
BYV27- 150
C6
100U/25V
IC1
L7812CV
C5
100N
BZT03-C16
D2
BYV27- 150
C4
BC640
1
S1
R15
330U/25V
2
CON2
1R8
IC4
7815
C25
100N
C47
180U/25V
R20
12R/10W
V27NF
V27NY
V27N
R11
75R0
R12
150R
IC2
7915
C48
100N
C9
180U/25V
R21
12R/10W
V27N
C1
R2
Q1
BT139
A2A1
G
AC_INPUT
D
100N/275V
NTC_B57237
V27NFB
GND
VAR1
275V
L1
TL25-050-182
4
2
3
1
1
2
K1
CON2
K4
J1
1
2
CON2
C
123456789
AC_SEL
10
CON10
PMPWRCTL_BOARD
V27NF
123
4
J2
CON4
B
A
12345678
- 7 -
Page 10
D
C
B
A
CURR
OUT
C2
10U/50V
4
R13
24K
D2
TMBYV 1 -40
D3
TMBYV 10-40
VCC1
3
4
VCC
OUT
VFWD
10K
VREF
12
R12
470P_NPO
2K2
VFWD
D4
321
U1
6
BAS85
27K
C12
R9
R8
CURR/10
D1
1N414BS
R16
10R7
R14
180R
2
ILIM
FEEDBK
8
R23
C1
2 2U/35V
C13
R2
47R0
27N
R15
14
100K
4R30
C11
SOFTST
R15----4R30
050111 modify
470P_NPO
C10
27N
1
COUNT
ISET9RAMP10FREQ
7
13
5
GND
PGND
SLOPE
11
R10
28K
VR1
R11
10K
J1
VCC1
UCC3571D
C7
C8
123456789
OUT
VFWD
N/C
270P_NPO
20K
CURR
C7----N/C
CURR/10
C8----270P_NPO
10
FFEDBK
R10---28K
CON10
R11---10K
040515 modify
FFEDBK
U3
C14
27N
R17
180R
VCC2
U2
C4
68N
C5
R3
1K
R5
68R0
C6
R6
19K6
4
5
OPTO CNY17-3T
1
2
R1
68R0
1
3
VCC
COMP
2
R4
1K
47P
27N
8
7
COL
ISET
GND
EA+4REF
EA-
6
C16
UC39432BD
5
R19
1K
C18
470P_NPO
C15
68N
1K
1234
27N
R20
C17
470N
R22
19K6
C3
3N3
R7
150R
VCC2
R18
D
VCC2
75R0
123
J2
C
4
CON4
B
A
- 8 -
Page 11
4. Wiring Diagram
- 9 -
Page 12
- 10 -
Page 13
6. Exploded View & Mechanical Parts List
- 11 -
Page 14
Part List
Mechanical Parts List
No. Item NO. Item Description Specification pcs
1 MJ00476 cushion
A500.2 top_V1.0
1
2 MC00476 top cover A500.2 bottom_V1.0 1
3 MI02593 front panel A1000.4 right_V1.0 1
4 MI02595 front panel A1000.4 left_V1.0 1
5 MB03849 rear chassis 208.5*64.8*308 1
6 MA00813 panel 205.5*63.6*12 1
7 MC00675 top cover A500.2 DRAGONFLY_V1.0 1
8 MI02588 barrier A500.2 210*90*31.8_V1.0 1
9 NI03389 net