Page 1
www.audison.eu
THX
ADVANCED
MANUAL
CROSSOVER
Rev. b
Page 2
ADVANCED MANUAL / THX
Index 02
THESIS - The project 03
Assembling and Cable connection 04
Size 05
THX 2
THX 2 Mono-Wiring connections 07
THX 2 Bi-Wiring connections 08
THX 2 Installation recommended with default set filter 09
THX 2 Installation with door mounted tweeter 10
THX 2 Tweeter Level Ajustment 11
THX 2 LFS (Low Frequency Shaping): Adjusting Low Frequency Response to eliminate resonances 12
THX 2 How to disassemble the circuit board “Step 1” “Step 2” 13
THX 2 How to disassemble the circuit board “Step 3” “Step 4” 14
THX 2 Modifications on the single components 15
THX mh
THX mh Mono-Wiring connections 17
THX mh Bi-Wiring connections 18
THX mh Installation recommended with default set filter 19
THX mh Installation with door mounted midrange 20
THX mh Tweeter Level Adjustment 21
THX mh Midrange Hi-pass: Activation of the High-pass filter for the midrange” 22
THX mh How to disassemble the circuit board “Step 1” “Step 2” 23
THX mh How to disassemble the circuit board “Step 3” “Step 4” 24
THX mh Modifications on the single components 25
THX 3
THX 3 Mono-Wiring connections 27
THX 3 Bi-Wiring connections 28
THX 3 Tri-Wiring connections 29
THX 3 Installation recommended with default set filter 30
THX 3 Installation with door mounted midrange 31
THX 3 Installation with door mounted double woofer 32
THX 3 Installation with door mounted double woofer and midrange 33
THX 3 Tweeter Level Adjustment 34
THX 3 Midrange Level Adjustment 35
THX 3 LFS (Low Frequency Shaping): Adjusting Low Frequency Response to eliminate resonances 36
THX 3 How to disassemble the circuit board “Step 1” “Step 2” 37
THX 3 How to disassemble the circuit board “Step 3” “Step 4” 38
THX 3 Modifications on the single components 39
Technical Specifications 40
General
02
Page 3
ADVANCED MANUAL / THX
THESIS
The Project
In order to create a system capable of reproducing amazing, first-class Sound, each acoustical
component must abide to the most elevated standards of quality and design.
The Thesis amplifiers offer their best performance when used with speakers designed with the same
philosophy. Throughout the years Thesis has represented a name referenced to the perfection of
electro
nic design and performance. Today, technological development has enabled us to push the
envelope in terms of the prestigious Thesis tradition. Creating a supreme product in amplification, the
Audison development team has achieved their ambition of reproducing an unparalleled Sound.
Appropriate tuning
Assembling a speaker system imposes choices in which parameters such as personal taste, the
physical installation limits and the acoustic environment of the vehicle itself have to be considered.
Thesis speakers ensure the highest performance with both multi-amplified active systems and with
systems using “passive” crossovers.
Pairing TH speakers with the TH amplifiers intensifies the synergy of products belonging to the same
magnificent project. Therefore, choosing an active multi-amplified system or the use of passive
c
rossovers is merely a question of personal taste.
The available crossover networks are:
THX 2, for a full range two-way system with TH 1.5 violino and TH 6.5 sax;
THX 3, for a full range three-way system with TH 1.5 violino, TH 3.0 voce and TH 6.5 sax;
THX mh, for a mid to high frequency system with TH 3.0 voce and TH 1.5 violino as part of
a "mixed" multi-way system.
Open design
Each filter is, in actual fact, an “open” design which can be customised in order to obtain the best
acoustic response in any environment.
Extreme customization
A mother board, designed for maximum versatile adaptation, provides the ability for anyone to
customize their own THX crossover.
Designed as a continued project in-progress, it is possible to change and set:
- the power connection mode for BiWiring or when used as a passive multi-amplified
ystem;
s
- the output level of every single speaker;
- the cut-off frequency of every single output;
- the filter cut-off slope;
- the Q (quality factor) at the crossover frequency;
- the use of notch filters to adjust the system to the vehicles acoustics.
Audison Thesis Advisor
The THX crossover default configuration has been designed to achieve the highest sound quality
levels. This Advanced Manual offers complete information to fully enjoy their potential.
Each user has at his/her disposal the best support to make the most of the Thesis line expandability
and customization possibilities. Through the “Support” area of the Audison website the user can
interact with the Audison Thesis Advisor to be guided by a professional inside the Audison R&D
Division who will provide him/her with the opportunity to further enhance their crossover.
A mother board, designed for maximum versatile adaptation, provides the ability for the users to
customize their own THX crossover.
THX 3THX 2 THX mh
03
Page 4
Assembling
ADVANCED MANUAL / THX
O 4.2 x 38 mm
(supplied)
THX
Cable connection
L: 11 ÷ 15 mm (7/16” ÷ 5/8”)
O MAX: 4,8 mm (6 AWG)
2 mm
THX 3THX 2 THX mh
04
Page 5
Size
A B
ADVANCED MANUAL / THX
C
D
E
THX 2
THX mh
THX 3
A B C D E
190 166 348 324 66,5
1/2
7”
6”
258 234 438 414 66,5
3/16
10”
Misure espresse in millimetri e pollici / Measures in mm and inches
9”
1/2
13”
1/4
17”
3/4
12”
1/4
16”
3/4
2”
5/16
2”
THX 3THX 2 THX mh
5/8
5/8
05
Page 6
THX 2
ADVANCED MANUAL / THX 2
THX 2
PATTERNS
TUNING KIT (supplied)
N° 2 1Ω, 10W Resistors
N° 2 2,2Ω, 10W Resistors
N° 2 3,3Ω, 10W Resistors
N° 2 4,7Ω, 10W Resistors
N° 2 5,6Ω, 10W Resistors
N° 2 1µF, 330V Polypropylene capacitors
N° 4 4,2x38 mm cross headed,
self-tapping fixing screws
Page 7
THX 2 Mono-Wiring connection
Left Channel Right Channel
ADVANCED MANUAL / THX 2
TH 6.5
sax
TH 1.5
violino
Left Right
TH 1.5
violino
Amplifier to
the 2 way system
TH 6.5
sax
THX 2
Mono-Wiring
07
Page 8
THX 2 Bi-Wiring connection
Left Channel Right Channel
ADVANCED MANUAL / THX 2
TH 6.5
sax
TH 1.5
violino
Left Right
TH 1.5
violino
Amplifier to
Tweeter
Left Right
Amplifier to
Woofer
TH 6.5
sax
Bi-Wiring
THX 2
08
Page 9
ADVANCED MANUAL / THX 2
THX 2 Installation recommended
with default set filter
Tweeter suggested position
J1
J2
J3
L1
3,3mH
C2
220µF
R1
R2
R3
R4
4,7Ω
4,7Ω
15Ω
15Ω
L2
0,68mH
TH 6.5
sax
C1
0,68mH
L3
4,7µF
8,2Ω
J6
J7
J8
J9
R6
R7
R8
R9
5,6Ω
3,9Ω
2,2Ω
R5
6,8Ω
TH 1.5
violino
THX 2
09
Page 10
ADVANCED MANUAL / THX 2
THX 2 Installation with door mounted tweeter
J1
R1
J2
J3
L1
3,3mH
4,7Ω
R2
4,7Ω
R3
15Ω
R4
15Ω
L2
0,68mH
Left Channel
C
C2
220µF
TH 6.5
sax
C1
L3
0,68mH
4,7µF
1,0µF C3
A
J6
J8
J9
R6
4,7Ω
3,3Ω R7J7
R8
2,2Ω
R5
R9
1,0Ω
B
5,6Ω
C
TH 1.5
violino
Right Channel
B
A
B
A
C
WORK ON THESE COMPONENTS!
THX 2
(see page 13÷15)
10
Page 11
+4dB
+2dB
0dB
-2dB
+4dB
+2dB
0dB
-2dB
+4dB
+2dB
0dB
-2dB
+4dB
+2dB
0dB
-2dB
ADVANCED MANUAL / THX 2
THX 2 Tweeter Level Adjustment
dB
0
500 1k 2k 10k5k 20k
dB
0
0
500 1k 2k 10k5k 20k
-2
dB
0
500 1k 2k 10k5k 20k
dB
+2
0
+4
THX 2
500 1k 2k 10k5k 20k
11
Page 12
- 4dB
LFS
- 2dB
0dB
- 4dB
LFS
- 2dB
0db
- 4dB
LFS
- 2db
0dB
ADVANCED MANUAL / THX 2
THX 2 LFS (Low Frequency Shaping)
Adjusting Low Frequency Response to eliminate resonances
dB
0
0
5020 100 200 500 1k 2k 10k5k 20k
180
dB
0
-2
5020 100 2 00 500 1k 2k 10k5k 20k
180
dB
0
-4
5020 100 200
180
500 1k 2k 10k5k 20k
THX 2
12
Page 13
ADVANCED MANUAL / THX 2
THX 2 How to disassemble the circuit board
Step 1: remove plexiglass cover (see page 4)
Step 2: remove the main screws (marked in blue)
Left Channel Right Channel
THX 2
13
Page 14
ADVANCED MANUAL / THX 2
THX 2 How to disassemble the circuit board
Step 3: remove the screws that secure the resistor blocks (marked in blue)
Step 4: remove the screws that secure the resistors with the clamps
Clamp
THX 2
14
Page 15
ADVANCED MANUAL / THX 2
THX 2 Modifications on the single components
Insert the supplied 1,0 µF
capacitor
A
B
C
Replace the 6,8Ω resistor originally
mounted with a 5,6Ω one supplied
with the product
THX 2
Replace the supplied resistors
originally mounted following the
diagram on page 10
15
Page 16
THX mh
ADVANCED MANUAL / THX mh
THX mh
PATTERNS
TUNING KIT (supplied)
N° 2 1.5 mH, Ø 42 mm inductances
N° 2 1µF, 330V Polypropylene capacitors
N° 4 4,2x38 mm cross headed,
self-tapping fixing screws
Page 17
ADVANCED MANUAL / THX mh
THX mh Mono-Wiring connection
Left Channel Right Channel
TH 3.0
voce
TH 1.5
violino
Left Right
TH 1.5
violino
Amplifier to
the Mid-high system
TH 3.0
voce
THX mh
Mono-Wiring
17
Page 18
THX mh Bi-Wiring connection
Left Channel Right Channel
ADVANCED MANUAL / THX mh
TH 3.0
voce
TH 1.5
violino
Left Right
TH 1.5
violino
Amplifier to
Tweeter
Left Right
Amplifier to
Midrange
TH due
TH 3.0
voce
THX mh
Bi-Wiring
18
Page 19
ADVANCED MANUAL / THX mh
THX mh Installation recommended
with default set filter
Tweeter
suggested
position
Midrange
suggested
position
C1
J2
22µF
L1
1.00mH
C4
2,2µF
0,68mH
L3
C3
10µF
J5
J6
J7
R1
R2
2,2Ω
4,7Ω
TH 3.0
voce
TH 1.5
violino
THX mh
19
Page 20
ADVANCED MANUAL / THX mh
10
µF
C2
1,5
mH
L2
THX mh Installation with door mounted midrange
Tweeter suggested position
J2
22µF
C1
A
10µF
C2
1,5mH
L2
B
1.00mH
L1
J1
C3
10µF
TH 3.0
voce
Left Channel
A
C4
2,2µF
L3
0,68mH
J5
2,2Ω
J6
J7
R1
R2
4,7Ω
TH 1.5
violino
Right Channel
A
BB
THX mh
WORK ON THESE COMPONENTS!
(see Page 23÷25)
20
Page 21
0dB
+2dB
-2dB
0dB
+2dB
-2dB
0dB
+2dB
-2dB
ADVANCED MANUAL / THX mh
THX mh Tweeter Level Adjustment
dB
0
500 1k 2k 10k5k 20k
dB
0
-2
dB
0
0
+2
THX mh
500 1k 2k 10k5k 20k
500 1k 2k 10k5k 20k
21
Page 22
ADVANCED MANUAL / THX mh
THX mh Midrange Hi-pass
Activation of the High-pass filter for the midrange
dB
0
5020 100 200 500 1k 2k 10k5k 20k
Hi-pass frequency: ON
dB
0
0
5020 100 200 500 1k 2k 10k5k 20k
Hi-pass frequency: OFF
THX mh
22
Page 23
ADVANCED MANUAL / THX mh
THX mh How to disassemble the circuit board
Step 1: remove plexiglass cover (see page 4)
Step 2: remove the main screws (marked in blue)
Left Channel Right Channel
THX mh
23
Page 24
ADVANCED MANUAL / THX mh
THX mh How to disassemble the circuit board
Step 3: remove the screws that secure the resistor blocks (marked in blue)
Step 4: remove the screws that secure the resistors with the clamps
Left Channel Right Channel
Clamp
THX mh
24
Page 25
ADVANCED MANUAL / THX mh
THX mh Modifications on the single components
Insert the supplied 10 µF capacitor
A
B
THX mh
Insert the supplied 1,5 mH coil
25
Page 26
THX 3
ADVANCED MANUAL / THX 3
THX 3
PATTERNS
TUNING KIT (supplied)
N° 2 1.5 mH, Ø 42 mm inductances
N° 2 6,8Ω, 10W Resistors
N° 2 2,2Ω, 25W Resistors
N° 2 2,7Ω, 25W Resistors
N° 2 3,3Ω, 25W Resistors
N° 2 10µF, 250V Polypropylene capacitors
N° 4 4,2x38 mm cross headed,
self-tapping fixing screws
Page 27
THX 3 Mono-Wiring connection
Left Channel Right Channel
ADVANCED MANUAL / THX 3
C4
R19
R6
L1
L3
L2
C2
C1
C5
C3
J3
0db
J4
-2db
J5
-4db
LFS
J1
J2
OFF ON
OFF ON
TH 3.0
L5
J8
-2db
J9
0db
J10
+2db
MD
Level
L4
R1 R9
J11
-2db
J12
R2
0db
J13
TW Level
+2db
R3
J14
+4db
R4
R5
C6
J1
J2
OFF ON
OFF ON
TH 1.5
violino
R20
R7
R21
R8
R14 R22
R10
R15
R11
R16
R12
R17
R13
R18
TH 1.5
violino
L9
J20
-2db
J21
0db
J22
+2db
MD
Level
J15
-2db
J16
0db
J17
TW Level
+2db
J18
+4db
C7
J1
J2
OFF ON
voce
TH 6.5
sax
L7
R23
R24
R25
R26
OFF ON
TH 3.0
voce
C9
C10
C8
J24
0db
J25
-2db
J26
-4db
LFS
J1
J2
OFF ON
OFF ON
+ OUTPUT - WF + INPUT -+ OUTPUT - TW + INPUT - TW + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT - + OUTPUT - MD + INPUT - WF + OUTPUT -+ INPUT -
L10
L8
L6
C12
C11
TH 6.5
sax
Mono-Wiring
THX 3
Left Right
Amplifier to
the 3 way system
27
Page 28
THX 3 Bi-Wiring connection
AB
Left Channel Right Channel
ADVANCED MANUAL / THX 3
C4
R19
R6
L1
L3
L2
C2
C1
C5
C3
J3
0db
J4
-2db
J5
-4db
LFS
AB
J1
J2
OFF ON
OFF ON
TH 3.0
L5
J8
-2db
J9
0db
J10
+2db
MD
Level
L4
R1 R9
J11
-2db
J12
R2
0db
J13
TW Level
+2db
R3
J14
+4db
R4
R5
C6
J1
J2
OFF ON
OFF ON
TH 1.5
violino
R20
R7
R21
R8
R14 R22
R10
R15
R11
R16
R12
R17
R13
R18
TH 1.5
violino
L9
J20
-2db
J21
0db
J22
+2db
MD
Level
J15
-2db
J16
0db
J17
TW Level
+2db
J18
+4db
C7
J1
J2
OFF ON
voce
TH 6.5
sax
L7
R23
R24
R25
R26
OFF ON
TH 3.0
voce
C9
C10
C8
J24
0db
J25
-2db
J26
-4db
LFS
AB
J1
J2
OFF ON
OFF ON
+ OUTPUT - WF + INPUT -+ OUTPUT - TW + INPUT - TW + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT - + OUTPUT - MD + INPUT - WF + OUTPUT -+ INPUT -
L10
L8
L6
C12
C11
TH 6.5
sax
Bi-Wiring
THX 3
Left Right
Amplifier to
Tweeter + Midrange
Left Right
Amplifier to
Woofer
Mono-Wiring
28
Page 29
THX 3 Tri-Wiring connection
Left Channel Right Channel
ADVANCED MANUAL / THX 3
C4
R19
R6
L1
L3
L2
C2
C1
C5
C3
J3
0db
J4
-2db
J5
-4db
LFS
J1
J2
OFF ON
OFF ON
TH 3.0
L5
J8
-2db
J9
0db
J10
+2db
MD
Level
L4
R1 R9
J11
-2db
J12
R2
0db
J13
TW Level
+2db
R3
J14
+4db
R4
R5
C6
J1
J2
OFF ON
OFF ON
TH 1.5
violino
R20
R7
R21
R8
R14 R22
R10
R15
R11
R16
R12
R17
R13
R18
TH 1.5
violino
L9
J20
-2db
J21
0db
J22
+2db
MD
Level
J15
-2db
J16
0db
J17
TW Level
+2db
J18
+4db
C7
J1
J2
OFF ON
voce
TH 6.5
sax
L7
R23
R24
R25
R26
OFF ON
TH 3.0
voce
C9
C10
C8
J24
0db
J25
-2db
J26
-4db
LFS
J1
J2
OFF ON
OFF ON
+ OUTPUT - WF + INPUT -+ OUTPUT - TW + INPUT - TW + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT - + OUTPUT - MD + INPUT - WF + OUTPUT -+ INPUT -
L10
L8
L6
C12
C11
TH 6.5
sax
Bi-Wiring
Left Right
Amplifier to
Tweeter
Left Right
Amplifier to
Midrange
Left Right
Amplifier to
Woofer
THX 3
29
Page 30
ADVANCED MANUAL / THX 3
THX 3 Installation recommended
with default set filter
J3
J4
J5
Tweeter
suggested
position
Midrange
suggested
position
3,3mH
L2
220µF
C2
1.00mH
22µF
C4
L1
R1
R2
R3
R4
4,7Ω
4,7Ω
15Ω
15Ω
4.7mH
L3
C1
C3
47µF
J8
J9
J10
10µF
R6
R7
R8
R5
4,7Ω
3,9Ω
3,3Ω
4,7Ω
TH 6.5
sax
TH 3.0
voce
2,2µF
C6
J11
J12
L9
TW Level
J23
J14
C9
C10
L7
R23
R24
R25
R26
OFF ON
0,68mH
L4
C4
R19
R6
L1
L3
L2
C2
C1
C5
C3
J3
0db
J4
-2db
J5
-4db
LFS
J1
J2
OFF ON
OFF ON
L5
J8
-2db
J9
0db
J10
+2db
MD
Level
L4
R1 R9
J11
-2db
J12
R2
0db
J13
TW Level
+2db
R3
J14
+4db
R4
R5
C6
J6
J7
OFF ON
OFF ON
R20
R7
R21
R8
R14 R22
R10
R15
R11
R16
R12
R17
R13
R18
J15
-2db
J16
0db
J17
+2db
J18
+4db
C7
J20
-2db
J21
0db
J22
+2db
MD
Level
J19
OFF ON
8,2Ω
R9
R10
5,6Ω
3,3Ω
R11J13
1,5Ω
R12
R13
10Ω
TH 1.5
violino
THX 3
L10
C8
J24
0db
J25
-2db
J26
-4db
LFS
J27
J28
OFF ON
OFF ON
+ OUTPUT - WF + INPUT -+ OUTPUT - TW + INPUT - TW + OUTPUT -+ INPUT - WF + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT - + OUTPUT - MD + INPUT -
L8
L6
C12
C11
30
Page 31
ADVANCED MANUAL / THX 3
6,8
Ω
R5
.1,5mH
L5
2,7
Ω
3,3
Ω
2,2
Ω
R6R7J8J9R8
J10
AA
THX 3 Installation with door mounted midrange
J3
4,7Ω
3,3mH
L2
220µF
L1
A
.1,5mH
L5
R1
R2
R3
R4
1.0 mH
4,7Ω
15Ω
15Ω
4.7mH
L3
C1
47µF
C3
J8
J9
10µF
D
R6
R7
R8J10
R5
TH 6.5
sax
3,3Ω
2,7Ω
2,2Ω
6,8Ω
B
Tweeter
suggested
position
J4
J5
C2
C4
22µF
10µF
C5
C
TH 3.0
voce
2,2µF
C6
0,68mH
L3
J11
J12
J14
R9
R10
R11J13
R12
8,2Ω
5,6Ω
3,3Ω
1,5Ω
R13
10Ω
TH 1.5
violino
Left Channel Right Channel
C4
L1
C5
L3
L2
C2
C1
C3
J3
0db
J4
-2db
J5
-4db
LFS
J1
J2
OFF ON
OFF ON
CC
L5
J8
-2db
J9
0db
J10
+2db
MD
Level
L4
R1 R9
J11
-2db
J12
R2
0db
J13
TW Level
+2db
R3
J14
+4db
R4
R5
C6
J1
J2
OFF ON
OFF ON
R19
R6
R20
R7
DD
R21
R8
R14 R22
R10
R15
R11
R16
R12
R17
R13
R18
J20
-2db
J21
0db
J22
+2db
MD
Level
J15
-2db
J16
0db
J17
+2db
J18
+4db
C7
J1
OFF ON
L9
TW Level
J2
C9
C10
C8
L7
R23
R24
R25
R26
OFF ON
J24
0db
J25
-2db
J26
-4db
LFS
BB
J1
J2
OFF ON
OFF ON
+ OUTPUT - WF + INPUT -+ OUTPUT - TW + INPUT - TW + OUTPUT -+ INPUT - WF + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT - + OUTPUT - MD + INPUT -
L10
L8
L6
C12
C11
THX 3
WORK ON THESE COMPONENTS! (see page 37÷39)
31
Page 32
3.3mH
L3
ADVANCED MANUAL / THX 3
THX 3 Installation with door mounted
double woofer
Tweeter
suggested
position
Midrange
suggested
position
C4
C6
L4
0,68mH
J3
J4
J5
22µF
2.2µF
L2
C2
3.3mH
220µF
1.00 mH
L1
R1
R2
R3
R4
J11
J12
4,7Ω
4,7Ω
15Ω
15Ω
3.3mH
L3
C1
C3
E
47µF
J8
J9
10µF
R9
R10
R11J13
R12J14
8.2Ω
5.6Ω
3.3Ω
1.5Ω
R6
R7
R8J10
R13
R5
4.7Ω
3.9Ω
3.3Ω
4.7Ω
10Ω
2 x
TH 6.5
sax
TH 3.0
TH 1.5
violino
voce
Left Channel Right Channel
C4
R6
R19
L1
L3
L2
C2
C1
C5
C3
J3
0db
J4
-2db
J5
-4db
LFS
J1
J2
OFF ON
OFF ON
L5
J8
-2db
J9
0db
J10
+2db
MD
Level
L4
R1 R9
J11
-2db
J12
R2
0db
J13
TW Level
+2db
R3
J14
+4db
R4
R5
C6
J6
J7
OFF ON
OFF ON
R7
R20
R8
R21
R14 R22
R15
R10
R16
R11
R17
R12
R18
R13
L9
J20
-2db
J21
0db
J22
+2db
MD
Level
J15
-2db
J16
0db
J17
TW Level
+2db
J18
+4db
C7
J19
J23
OFF ON
C9
C10
C8
L7
R23
R24
R25
R26
OFF ON
J24
0db
J25
-2db
J26
-4db
LFS
J27
J28
OFF ON
OFF ON
+ OUTPUT - WF + INPUT -+ OUTPUT - TW + INPUT - TW + OUTPUT -+ INPUT - WF + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT - + OUTPUT - MD + INPUT -
L10
L8
EE
L6
C12
C11
THX 3
WORK ON THIS COMPONENT! (see page 37÷39)
32
Page 33
ADVANCED MANUAL / THX 3
THX 3 Installation with door mounted
double woofer and midrange
J3
4,7Ω
3,3mH
220µF
1.00mH L1
A
.1,5mH L5
R1
R2
R3
R4
4,7Ω
15Ω
15Ω
3.3mH
L3
47µFC1
C3
Tweeter
suggested
position
J4
J5
L2
C2
C4
22µF
10µF
C5
C
E
10µF
2 x
TH 6.5
sax
D
R6
J8
J9
R7
R8J10
R5
3,3Ω
2,7Ω
2,2Ω
6,8Ω
TH 3.0
voce
B
2,2µF
C6
J11
J12
R9
R10
8,2Ω
5,6Ω
3,3Ω R11J13
R12J14
0,68mH L4
1,5Ω
R13
10Ω
TH 1.5
violino
Left Channel Right Channel
C4
L1
L3
L2
C2
C1
C5
A
C3
J3
0db
J4
-2db
J5
-4db
LFS
J1
J2
OFF ON
OFF ON
CC
L5
J8
-2db
J9
0db
J10
+2db
MD
Level
L4
R1 R9
J11
-2db
J12
R2
0db
J13
TW Level
+2db
R3
J14
+4db
R4
R5
C6
J6
J7
OFF ON
OFF ON
R19
R6
DD
R7
R20
R8
R21
R14 R22
R15
R10
R16
R11
R17
R12
R18
R13
J20
-2db
J21
0db
J22
+2db
MD
Level
J15
-2db
J16
0db
J17
+2db
J18
+4db
C7
J19
OFF ON
L9
TW Level
J23
C9
C10
L10
THX 3
A
C8
L7
R23
R24
R25
R26
OFF ON
J24
0db
J25
-2db
J26
-4db
LFS
BB
J27
OFF ON
EE
J28
OFF ON
+ OUTPUT - WF + INPUT -+ OUTPUT - TW + INPUT - TW + OUTPUT -+ INPUT - WF + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT - + OUTPUT - MD + INPUT -
L8
L6
C12
C11
WORK ON THESE COMPONENTS! (see page 37÷39)
33
Page 34
J13
J12
J11
J14
TW Level
-2dB
0dB
+2dB
+4dB
J10
+2db
MD
Level
J13
J12
J11
J14
TW Level
-2dB
0dB
+2dB
+4dB
J10
+2db
MD
Level
J13
J12
J11
J14
TW Level
-2dB
0dB
+2dB
+4dB
J10
+2db
MD
Level
J13
J12
J11
J14
TW Level
-2dB
0dB
+2dB
+4dB
J10
+2db
MD
Level
ADVANCED MANUAL / THX 3
THX 3 Tweeter Level Adjustment
dB
0
500 1k 2k 10k5k 20k
dB
0
0
-2
R6
J8
-2db
J9
0db
J10
+2db
MD
Level
500 1k 2k 10k5k 20k
R7
R8
L4
R1 R9
J11
-2db
R2
R3
J12
0db
TW Level
J13
+2db
J14
+4db
R10
R11
dB
500 1k 2k 10k5k 20k
R4
R5
R12
R13
THX 3
C6
dB
+2
00
500 1k 2k 10k5k 20k
+4
34
Page 35
C4
J11
-2db
J11
J10
J9
J8
MD
Level
-2dB
+2dB
0dB
-2db
J11
J10
J9
J8
MD
Level
-2dB
+2dB
0dB
-2db
J11
J10
J9
J8
MD
Level
-2dB
+2dB
0dB
ADVANCED MANUAL / THX 3
THX 3 Midrange Level Adjustment
dB
0
5020 100 200 500 1k 2k 10k5k
R6
R19
C5
L5
R20
R7
J8
-2db
C3
J9
0db
R8
R21
J10
+2db
MD
Level
L4
R1 R9
R14
J11
-2db
J3
0db
R2
J4
dB
0
-2
-2db
J5
-4db
LFS
R3
R4
J12
0db
J13
TW Level
+2db
J14
+4db
R10
R15
dB
+2
0
R11
R12
R16
R17
THX 3
5020 100 200 500 1k 2k 10k5k
R5
C6
5020 100 200 500 1k 2k 10k5k
R13
R18
35
Page 36
J4
J3
- 4dB
LFS
- 2dB
0dB
J4
J3
- 4dB
LFS
- 2dB
0dB
J4
J3
- 4dB
LFS
- 2dB
0dB
ADVANCED MANUAL / THX 3
THX 3 LFS (Low Frequency Shaping)
Adjusting Low Frequency Response to eliminate resonances
L1
L5
dB
0
L3
C5
0
C3
5020 100 200 500 1k 2k 10k5k 20k
160
L4
J5
J8
-2db
J9
0db
J10
+2db
MD
Level
R1
J11
-2db
L2
J3
0db
J4
-2db
J5
-4db
LFS
R2
R3
R4
J12
0db
J13
TW Level
+2db
J14
+4db
C2
R5
C1
J1
J2
dB
0
-4
WF + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT -
OFF ON
OFF ON
dB
0
-2
OFF ON
J5
C6
J1
J2
OFF ON
THX 3
5020 100 200 500 1k 2k 10k5k 20k
160
5020 100 200 500 1k 2k 10k5k 20k
160
36
Page 37
ADVANCED MANUAL / THX 3
THX 3 How to disassemble the circuit board
Step 1: remove plexiglass cover (see page 4)
Step 2: remove the main screws (marked in blue)
C4
R19
R6
L1
L3
L2
C2
C1
C5
C3
J3
0db
J4
-2db
J5
-4db
LFS
J1
J2
OFF ON
OFF ON
L5
J8
-2db
J9
0db
J10
+2db
MD
Level
L4
R1 R9
J11
-2db
J12
R2
0db
J13
TW Level
+2db
R3
J14
+4db
R4
R5
C6
J1
J2
OFF ON
OFF ON
R20
R7
R21
R8
R14 R22
R15
R10
R16
R11
R17
R12
R18
R13
L9
J20
-2db
J21
0db
J22
+2db
MD
Level
J15
-2db
J16
0db
J17
TW Level
+2db
J18
+4db
C7
J1
J2
OFF ON
C9
C10
C8
L7
R23
R24
R25
R26
OFF ON
J24
0db
J25
-2db
J26
-4db
LFS
J1
J2
OFF ON
OFF ON
+ OUTPUT - WF + INPUT -+ OUTPUT - TW + INPUT - TW + OUTPUT -+ INPUT - WF + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT - + OUTPUT - MD + INPUT -
L10
L8
L6
C12
C11
THX 3
37
Page 38
ADVANCED MANUAL / THX 3
THX 3 How to disassemble the circuit board
Step 3: remove the screws that secure the resistor blocks (marked in blue)
Step 4: remove the screws that secure the resistors with the clamps
C4
L1
L3
L2
C2
C1
C5
C3
J3
0db
J4
-2db
J5
-4db
LFS
J1
J2
OFF ON
OFF ON
L5
J8
-2db
J9
0db
J10
+2db
MD
Level
L4
R1 R9
J11
-2db
J12
R2
0db
J13
TW Level
+2db
R3
J14
+4db
R4
R5
C6
J1
J2
OFF ON
OFF ON
R19
R6
R7
R20
R8
R21
R14 R22
R10
R15
R11
R16
R12
R17
R13
R18
J15
-2db
J16
0db
J17
+2db
J18
+4db
C7
J20
-2db
J21
0db
J22
+2db
MD
Level
J1
OFF ON
L9
TW Level
J2
C9
C10
C8
L7
R23
R24
R25
R26
OFF ON
J24
0db
J25
-2db
J26
-4db
LFS
J1
J2
OFF ON
OFF ON
+ OUTPUT - WF + INPUT -+ OUTPUT - TW + INPUT - TW + OUTPUT -+ INPUT - WF + OUTPUT -+ INPUT - MD + OUTPUT -+ INPUT - + OUTPUT - MD + INPUT -
L10
L8
L6
C12
C11
Clamp
THX 3
38
Page 39
ADVANCED MANUAL / THX 3
THX 3 Modifcations on the single components
1. Remove the screws securing the
coil from the bottom of the PCB;
2. Unsolder the coil leads;
3. Unwind the coil with the help of
an LCR meter until the value of
3,3 mH can be measured;
4. Refixe the coil.
originally mounted with the 6,8Ω
Replace the 4,7Ω resistor
one, supplied with the product.
B
A
E
THX 3
CD
capacitor
Insert the supplied 1,5 mH coilInsert the supplied 10 µF
Replace the supplied
resistors originally mounted
following the diagram
on page 31 or 33
39
Page 40
Technical Specifications
ADVANCED MANUAL / TH X
Type
Size
Power
Handling
Crossover frequency
Slope
Thesis speaker set
Component Adjustment
Sound Control
mm / inch
W peak
W continuous
LO/HI-pass
dB/Oct.
Tweeter
Midrange
Woofer
THX 2
Stereo 2 way
Passive Crossover Network
348x190x66,5
3/4
1/2
x7”
x2”
5/8
13”
400
200
2.5 kHz
6/12
TH 1.5 violino +
TH 6.5 sax
-2; 0; +2; +4 dB
LFS 0; -2; -4 dB
Low Frequency Shaping
Speaker Position Contour
Multi-Amp Configuration
Audison Thesis Advisor
THX 3
Stereo 3 way
Passive Crossover Network
438x258x66,5
1/4
1/4
17”
x10”
400
200
450 Hz / 3.5 kHz
12/6-12/12
TH 1.5 violino +
TH 3.0 voce +
TH 6.5 sax
-2; 0; +2; +4 dB
-2; 0; +2 dB
LFS 0; -2; -4 dB
Low Frequency Shaping
Speaker Position Contour
Multi-Amp Configuration
Audison Thesis Advisor
x2”
5/8
THX mh
Stereo 2 way Mid-High
Passive Crossover Network
348x190x66,5
3/4
1/2
x7”
x2”
5/8
13”
400
200
280 Hz / 3.5 kHz
6 (ON-OFF) / 12 (default)
12 (ON-OFF) / 12 (optional)
TH 1.5 violino +
TH 3.0 voce
-2; 0; +2 dB
MD Hi-pass ON/OFF
(280 Hz @ 6/12 dB/Oct.)
Low Frequency Shaping
Speaker Position Contour
Multi-Amp Configuration
Audison Thesis Advisor
THX 3THX 2 THX mh
40
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