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€590
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  • Audioquest PowerQuest 303
  • Audioquest NRG-Y3 1m
In stock
€616

Complementary products

PowerQuest 303 Power Conditioner

In the world of high-fidelity audio, power supply is one of the fundamental pillars for ensuring optimal audio performance. Stereo systems, multi-channel home theaters, and custom installations demand clean and stable power to express their full power and clarity. This is where the new PowerQuest 303 Power Conditioner comes into play, providing a solid foundation for exceptional audio performance.

Uncompromising Performance

The PowerQuest 303 Power Conditioner adopts AudioQuest’s comprehensive approach to AC power conditioning, treating noise linearly to deliver first-order, wide-bandwidth noise reduction. This innovative approach results in linear noise dissipation of over -22 dB, ensuring uncompromised audio performance.

One of the distinctive features of this model is its differential mode, which effectively operates in a frequency range from 30 kHz to 1 GHz. This extended range allows for the attenuation of a wide spectrum of noise, contributing to exceptional audio quality.

Protection for Peace of Mind

The safety of your equipment is a top priority, and the PowerQuest 303 Power Conditioner is mindful of that. This model is equipped with non-sacrificial surge protection, ensuring the safeguarding of your devices in the event of a voltage spike. Additionally, it features automatic shutdown against extreme voltages at 140 VAC, offering complete peace of mind. You can set it and forget it, knowing your devices are secure.

Optimized Power Supply

Power is at the heart of any quality audio setup. The PowerQuest 303 Power Conditioner provides a total of 7 AC outlets, catering to the diverse needs of your devices. It offers 3 high-current outlets for amplification devices, ensuring adequate and consistent power supply. Furthermore, it provides 4 linear-filtered outlets for source devices, guaranteeing clean and stable power for optimal audio performance.

Ease of Installation and Use

AudioQuest has thought of everything, including ease of installation for professionals. The PowerQuest 303 Power Conditioner comes with optional 2RU rack ears, allowing for seamless integration into your existing setup. Moreover, it is accompanied by a removable 2-meter PowerQuest power cable with a flat wall plug. For installers, this means that each PowerQuest unit is ready to go from box to rack in just minutes.

PQ-415 Power Cord

To ensure optimal performance, the PowerQuest 303 Power Conditioner is supplied with the PQ-415 power cord. This 2-meter cord is crafted with semi-solid concentric long-grain copper (LGC), ensuring exceptional electrical conductivity. The IEC C-13 female connectors add to the reliability of this cord, providing a secure and stable connection.

Tailored Connectivity

One of the key advantages of the PowerQuest 303 Power Conditioner is its versatility in terms of connectivity. With 8 outlets dedicated to linear filtering for constant current/source components and 4 high-current outlets for variable current components, this model caters to the specific needs of various audio equipment. This allows you to optimize power distribution based on the characteristics of each device, ensuring exceptional audio performance.

Technical Specifications

Noise Reduction

  • Linear noise attenuation greater than -22 dB
  • Differential mode: 30 kHz - 1 GHz

PQ-415 Power Cord

  • Semi-rigid concentric structure
  • Long-Grain Copper (LGC), NEMA male plug
  • IEC C-13 female connectors
  • Length: 2 m

Surge Protection

  • Non-destructive surge protection
  • Withstands repeated input surge tests of 6,000 V / 3,000 A
  • Safety cutoff at 140 V AC

Connectivity

  • 4 linear-filtered outlets for source/constant current devices
  • 3 high-current outlets for variable current devices

General Characteristics

  • Maximum effective current: 15 A at 120 V
  • Dimensions (W × H × D): 43.2 × 7.6 × 33.0 cm
  • Weight: 10.2 kg

User reviews

Dominique

In my setup, it makes a noticeable improvement to the listening experience. I compared it with a Dynavox on my ifitest system.
It is more balanced across the entire frequency range than the latter, especially with the supplied Audioquest cable.
The improvement will depend on the quality of your mains power supply. If your mains supply is free from interference, the difference may be negligible on your system.

Comment from 29 October 2026 — Experience from 14 August 2026

Automatically translated — Show original (French)
Chez moi apport non négligeable sur l'écoute, je l'ai comparé à un Dynavox sur ma chaîne ifitest.
Il est plus équilibré sur tout la bande passante que ce dernier, surtout avec le câble Audioquest fourni.
Le gain dépendra de la qualité de votre alimentation secteur, si l'alimentation secteur n'est pas polluée, la différence sera peut être negligeable sur votre système.

Steve

perfect, solid and practical construction for filtering

Comment from 20 April 2026 — Experience from 20 March 2026

Automatically translated — Show original (French)
parfait construction solide et pratique pour filtrer

Pedro

It is a very good product

Comment from 2 April 2026 — Experience from 20 February 2026

Automatically translated — Show original (Spanish)
Es muy buen producto
  • Eco-contribution included in the sale price.
  • Manufacturer reference: PQ303EU
  • GTIN / EAN: 92592021761
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