QA-9 Pro

KX-8 Variable Gain Preamplifier

VX-8 Power Amplifier

CX-8 CD Player








QA-9 Pro


The QA-9 Pro Analog-to-Digital converter is Ayre Acoustics best kept secret, and our gift to the world of recording.

Designed around a fully discrete, fully balanced, zero-feedback analog circuit, with our signature variable gain staging, the QA-9 Pro will unlock the soundstage, fidelity and tonal balance in your recordings that you have heard in your head for years.

With the Arda AT1201 at the heart of the digital conversion process, you will become immersed in the music like never before. Astonishing dynamic range, and time, phase, and frequency accuracy, make the QA-9 Pro the gold standard for recording, mastering, archiving or product development.


Up to 24 bit /192 kHz digital output.

Variable gain circuitry for input level control.

Optional word clock / DSD output board (Pro version)

Separate left and right recording level meters.

Zero-feedback, fully-balanced discrete circuitry.

Equilock circuitry for active gain devices.



Input Impedance
2 MΩ balanced (1 MΩ per phase)

Analog Input Sensitivity
10.0 Vrms—at minimum gain
0.75 Vrms—at maximum gain

Analog XLR Input Polarity
Pin 1 = Ground
Pin 2 = Non-inverting (Positive)
Pin 3 = Inverting (Negative)

Frequency Response
DC – 20 kHz (44.1 kHz sample rate)
DC – 22 kHz (48 kHz sample rate)
DC – 40 kHz (88.2 kHz sample rate)
DC – 44 kHz (96 kHz sample rate)
DC – 60 kHz (176.4 kHz sample rate)
DC – 66 kHz (192 kHz sample rate)
DC – 20 kHz (DSD64)
DC – 40 kHz (DSD128)
DC – 80 kHz (DSD256)

USB Audio Output Signal
Class 2 44.1, 48, 88.2, 96, 176.4, and 192 kHz at 24 bits
Class 1 44.1, 48, 88.2 and 96 kHz at 24 bits

AES/EBU Output Signal
44.1, 48, 88.2, 96, 176.4 and 192 kHz at 24 bits

Word Clock Output Signal
44.1, 48, 88.2, 96, 176.4 and 192 kHz

DSD Output Signal
SDIF-2: 64x, 128x, and 256x
SDIF-3: 64x and 128x

110Ω, transformer-isolated

Word Clock / DSD BNCs
75Ω, transformer-isolated

Power Consumption
25 watts

8.5″W x 12″D x 3″H (21.5cm x 30.5cm x 7.5cm)

5 pounds (2.3 kg)


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