Audison THESIS THX 2, THESIS THX 3, THESIS THX mh Advanced Manual

www.audison.eu

THX

ADVANCED

MANUAL

CROSSOVER

Rev. b

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

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

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

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

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

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

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

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

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

+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

- 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