QULOOS QA690 FDA Power Amplifier 24bit 192khz 2x100W / 8 Ohm

QULOOS QA690 FDA Power Amplifier 24bit 192khz 2x100W / 8 Ohm
The Full Digital Amplifier FDA QULOOS QA690 is the worthy successor of the QLS QA-100, the first affordable FDA amplifier on the market that is unanimously acclaimed by its users.

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Quloos QA690

Truly innovative FDA technology:

The Full Digital Amplifier FDA QULOOS QA690 is the worthy successor of the QLS QA-100, the first affordable FDA amplifier on the market that is unanimously acclaimed by its users.

The QULOOS QA690 takes back the electronic quality, the very high level components of the QA100 by bringing innovations which were lacking. Thus, the Quloos brand designer listening to his customers now offers much more than a revision of the QA-100.

The QULOOS QA690 offers all the advantages of FDA amplification with an audio signal reducing all stages of conventional conversion and amplification by only 3 stages instead of the usual 8.

FDA amplifiers, which can be described as digital power converters, offer today a real evolution and alternative to traditional analog and digital amplifiers.

amplificateur FDA Quloos QA680

Very high level active and passive components:

Rotating around two 150W TAS5624 amplification chips (Texas Instrument), the QA690 offers the ultimate in Full Digital Amplifier.

The asynchronous signal reshaping input chip SRC AKM AK 4137 sends the stream

The asynchronous signal reshaping input chip SRC AKM AK 4137 sends the PCM audio stream into the amplifier chips with as little jitter as possible.

Inspired by the Quloos QA661 Digital player, the two clocks of the QA690 have their own separate power supplies on LT1763 regulator and ceramic VIMA and NPO film capacitors (thermal stability).

The phase noises (jitter) are thus rejected at the limit of the measurable bringing a liquid, full, analog sound. The design and manufacturing quality of the QA690 far exceeds the usual criteria that have earned the brand its reputation.

The best passive components are in the QA690 : VIMA, Panasonic capacitors, Vishay MELF and Holco resistors, shielded output filter coils.

An analog filter and a high level PSRR power supply:

The power supply with British brand Kemet BHC capacitors (2x10000 µf) is now shielded and separated from the rest of the electronics greatly reducing EMI and RFI pollution between components.

With a significant number of separate LDO low noise controllers (LT1965, LT1963, LM1086) for each voltage, the QA 690 offers a stable electrical voltage quality with a high noise rejection rate, necessary for optimal digital signal rendering.

The QULOOS QA690 chassis is made entirely of military grade aluminum on a CNC Pirelli machine.

Quloos QA680


qobuz test qa 690 quloss

Quloos QA690 test by Qobuz


The On/Off button on the front panel is not backlit.


Characteristics:

  • Integrated amplifier FDA 2 amplifier chips TAS5624 2X100 W on 8Ohm
  • PurePath Digital Texas Instrument Technology
  • High and low settings

Inputs and outputs:

  • Two 192Khz 24bit SPDIF coaxial inputs
  • One Toslink 24bit 192Khz optical SPDIF input
  • One analog line input on Cinch RCA stereo
  • One stereo speaker output on gold-plated screw terminals

Technical data:

  • Power under 8 Ohm : 2x 100W
  • Power under 4 ohm : 2x160W
  • Dynamic capacity: 101dB
  • Signal-to-noise ratio : 101dB
  • Channel separation: 97dB
  • Distortion : 0.02%
  • Frequency Response: 10 to 20Khz
  • Power consumption in standby mode: 13w
  • Signal ratio, Speaker output: 117dB

Dimensions :

  • 300x216mm x100mm (excluding RCA and volume knob)
  • Weight: 5Kg

Bundle :

  • Remote control with volume control
  • 1m50 SPDIF µ-OFC coaxial cable with EMI ferrite
  • IEC mains cable 3 poles
  • Instructions for use in English

Quloos QA690

Quloos QA680

Quloos QA690

Quloos QA680

 
Data sheet
InputRCA
InputOptical
InputSPDIF
OutputSpeaker terminal
ColorBlack
StructureAluminium
Channel2 channels (Stereo)
ClassClass D / T
amplifier chipTAS5624
Power (max)100W
 
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Average votes
5.0 / 5
2 reviews
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Note :
 5/5
Date :
Livraison rapide et parfaite.
Produit en remplacement d'une bête analogique Sony TA-F830-ES pour gérer des JMLab Electra 920.1.
Son magnifique, clair, fidèle et puissant. Ce sur toute l'amplitude.
J'en suis ravi!
 (0)
 (0)
This review has been posted for QULOOS QA690 FDA Power Amplifier 24bit 192khz 2x100W / 8 Ohm
Note :
 5/5
Date :
DU HAUT DE GAMME A PRIX DEMOCRATIQUE
Que reste t'il aux amplificateurs dont les prix alignent lez zéros? Ce petit Quloos pourrait bien renverser la table avec ses caractéristiques sonores et musicales. Ayant possédé des petits amplis Full Digital (FX audio D802, Sabaj A3 et SMSL AD18) j'ai alors pu constater le potentiel de la technologie FDA avec cependant quelques déceptions concernant leur stabilité dans le temps (j'ai laissé un avis sur le FX D802 silver dans ce même site), en effet ces amplis valant autour de 100 euros embarquent des composants discrets de qualité modeste (résistors sous dimensionnés, condensateurs chimiques bas de gamme) dont les caractéristiques changent vite. Je voulais donc acquérir un FDA sérieux et ce Quloos QA690 est en ce sens un candidat à prendre en considération. Avec l'oeil de l'électronicien, j'ai effectivement trouvé de beaux condensateurs à film dont la stabilité n'est plus à démonter. Venons en à l'essentiel; la restitution sonore. Il faut avouer que dès les premières minutes d'écoute on est scotché par l'homogénéité musicale dont cette machine est capable. Ce qui frappe d'emblée c'est la très grande transparence, caractéristique générale des FDA, ceci au bénéfice de l'image stéréo qui se développe avec une aisance confondante. La dynamique est un autre point fort de ce produit, capable de véritable fulgurance autant que de délicatesse quand la musique l'impose, tout ceci sans la moindre agressivité ni brillance artificielle. Les timbres eux aussi sont simplement beaux, les transitoires du piano sont restitués ace une maestria étonnante, les moindres sons provenant du feutre des marteaux se perçoivent aisément mais sans aucune accentuation artificielle. La fluidité est excellente, le discours musical, le côté liquide des interprétations sont respectés avec grand talent. Un produit exceptionnel pour mélomane exigeant.
 (3)
 (0)
This review has been posted for QULOOS QA690 FDA Power Amplifier 24bit 192khz 2x100W / 8 Ohm
 
QULOOS QA690 FDA Power Amplifier 24bit 192khz 2x100W / 8 Ohm
The Full Digital Amplifier FDA QULOOS QA690 is the worthy successor of the QLS QA-100, the first affordable FDA amplifier on the market that is...

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