HAS-33S Pro | Ultimate Dual Speaker / Amplifier Selector

The Grand Master of Signal Routing. 3-In / 3-Out Independent Control with Zero Degradation.

The HAS-33S Pro is the most sophisticated speaker/amplifier selector in our lineup. Designed for audiophiles with complex setups, it allows you to connect up to three different amplifiers and three pairs of speakers, selecting any combination independently. Built with professional-grade components, it delivers the absolute purity required for the world’s finest audio systems.

Key Features (Pro Edition)

• ■ Dual-Independent Switching (3 x 3 Matrix)
  Equipped with two independent rotary switches. You can select one of 3 amplifiers and route it to one of 3 speaker pairs instantly. This provides unparalleled flexibility for comparing gear or managing multi-system environments.
• ■ SEIDEN Type 56 Silver Alloy Switches
  The heart of the Pro model features two massive SEIDEN (Japan) Type 56 rotary switches. Utilizing silver alloy contacts, these switches offer the lowest contact resistance and maximum longevity, ensuring the signal remains pristine over decades of use.
• ■ Extreme Low Resistance Path
  Every milliohm matters. The HAS-33S Pro is engineered to maintain a high Damping Factor (DF). By using oversized switches and high-purity Oxygen-Free Copper (OFC) internal wiring, it ensures your amplifier maintains perfect grip and control over your speaker drivers.
• ■ Universal Amp Compatibility (BTL & Tube)
  The selector switches both positive (+) and negative (-) lines simultaneously. It is 100% safe for all amplifier designs, including balanced (BTL), Class-D, and delicate vacuum tube amplifiers.
• ■ Masterpiece Build Quality
  Featuring a 4mm thick solid aluminum front panel and two 40mm machined aluminum knobs. The heavy-duty chassis (2.6kg) provides excellent stability and shielding against external interference.

Technical Specifications