THESIS: BEYOND THE ABSOLUTE

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TH quattro
Amplifier

|

4 Ch

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4 x 260 W @ 2 ohm

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A-class

Thesis amplifiers are born with the know-how and experience achieved with the HV venti, improved by the innovation of digital technology. The result is a perfect combination between the highest level of analog technology and the advanced features of the digital technology in one unique product. The precious synergy with Full DA HD technology takes the in-car listening experience to a new level of excellence; the synthesis of a unique know-how employed in mobile audio reproduction. TH quattro is a four-channel amplifier fully adjustable and entirely manageable by the internal microprocessor, for limitless system configurations.

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Amplifier Tech Data

Channels	4
Class	A-Class
Hi Level Input	No
Low Level Input	Yes
Digital Input	Yes
Power supply voltage / fuse	11 ÷ 15 VDC
Idling current when off	0.04 mA
Consumption @ 14.4 VDC, 2Ω, Max Musical Power	105 A
Remote OUT	12 VDC (20 mA)
Remote IN	7 ÷ 15 VDC (1 mA)

Amplifier Stage

Distortion - THD @ 100 Hz, 4Ω, 70% Rated Power	Distortion - THD @ 1 kHz, 4 Ω; 90% Power: 0.03 %
Bandwidth A	(-3 dB, 2 VRMS, 4 Ω): 5 ÷ 70k Hz
S/N ratio A	(A weighed @1 V): 104 dBA
Damping factor A	(1 kHz, 2 VRMS, 4 Ω): 80
Input sensitivity Pre-In	Pre-In sensitivity (two ranges): 0.3 ÷ 4.8 VRMS
Pre In Impedance	15 kΩ
Total Power RMS	1400 W
Output Power (RMS) @12.0 ÷ 14.4 VDC, 1% THD	4 Ch @ 4 Ω 160 W x 4 4 Ch @ 2 Ω 260 W x 4 4 Ch @ 1 Ω 340 W x 4 3 Ch @ 4 Ω 150 W x 2 +540 w x 1 3 Ch @ 2 Ω 250 w x 2 + 650 w x 1 2 Ch @ 4 Ω 500 W x 2 2 Ch @ 2 Ω 700 W x 2 Dual Power Mode - A Class: 4 Ch @ 4 Ω 55 W x 4
Adjustable Crossover	No

CEA Specifications

Output power @ 4Ω, 1% THD+N, 14.4 V	Output power @ 4Ω, 1% THD+N, 14.4 V: 150 W x 4 Ch
SN ratio (ref. 1W output)	SN ratio (ref. 1W output): 80 dBA

Inputs

Input Type	PRE - S/PDIF (Max 192 kHz / 24 bit) Optical and AD Link
Filters Outputs	PRE Bypass / AD Link
Filter Pass A	2 x Removable kits: (Hi-pass / Lo-pass / Bandpass 12/24dB) 32 steps 18 ÷ 7.5k Hz with 8 standard & 2 customizable modules

Other

Fuse	100 A
Weight	10.3 kg

Dimensions

Dimension A	510 mm
Dimension B	478 mm
Dimension C	259 mm
Dimension D	160 mm
Dimension E	66 mm

Accessories

DRC

Digital Remote Control permits the control of the main system without the use of a PC. Installed in an ergonomic position within the dashboard of the car, the user can: choose between two tuning configurations pre-sets created and saved using the bit software; select the source from the master, auxiliary and optical digital inputs; adjust main system functions (volume, balance, fader and subwoofer volume); identify the proper position of the sources output level set while tuning the bit processor as well as adjust the display brightness and to reduce glare during night driving.

ECK DRC

It is a kit composed of a cable and an adapter allowing a 2 m / 78.74 in. Additional extension of the cable supplied with the DRC. This extension is required for installations on especially long vehicles such as SUV. Total length of the supplied cable with the extension is equal to 6,5 m / 225.90 in.

Complementary differential circuitry with current mirror.
Cascode A Class driver with inverted complementary triplet power
stages.
Integrated 24-bit / 192 kHz Hi-End DA converters.
Compatibility with Audison Full DA HD technology and Hi-Res audio
files listening certification.
SPDIF and AD Link optical digital inputs that manage up to 8 digital
channels on RJ-45 connector.
Dual Mono Construction featuring four power supplies in Synchro-PWM
configuration.
Sensitivity control featuring 256 steps resistive switching for a
resolution of 120 dB.
Energy Saving, Hi-Current, Hi-AB Class, A Class presets selectable in
real time.
Digital control via integrated settings panel, DRC and PC Software.
High quality crossover module supplied.
Chassis extruded from solid aluminium and built using CNC machines.

Technologies

FULL DA HD

Pure digital signal transfer with a resolution up to 24 bit / 96 kHz

Hi-Res audio

According to the definition of HiRes audio provided by JAS (Japan Audio Society – jas-audio.or.jp), HV venti far exceed the above 40 kHz bandwith analog requirement, providing an astonishing 5 ÷ 75k Hz (@ -3 dB, 2 VRMS, 4 Ω).

DIGITAL INPUTS AND OUTPUTS

Innovation is at the heart of the state-of-the-art digital decoding section. The S/PDIF optical input allows direct connection to digital sources with the ability to re-launch the digital signal to other Thesis amplifiers through the AD Link (Audison DigitalLink) system. Each amplifier features 192 kHz/24 bit PCM D/A conversion through a very high quality converter.

BIAS CONTROL

Provides the selection of four possible presets: Energy Saving, Hi-Current, Hi-AB Class and full A Class operation.

REMOVABLE CROSSOVER

Inherited from the HV venti and making the most of TH’s extreme versatility, the complete crossover circuit of the TH amplifier is removable; a high-end sound quality solution.