Oehlbach Bi-Tech 4.4 B (2 x 2m)

The Oehlbach Bi-Tech 4.4 B features an innovative hybrid architecture, combining two types of specialized conductors to optimize the transmission of each frequency range. Specifically designed for bi-amplification, it targets demanding audiophiles seeking to fully exploit the potential of their high-fidelity systems.

Hybrid Architecture and Technical Construction

The Bi-Tech 4.4 B takes a novel approach to speaker cable design. Its structure integrates four distinct conductors divided into two functional groups: the midrange and treble benefit from silver-plated copper conductors with a cross-section of 2 x 2.5 mm², while the low frequencies are transmitted by oxygen-free copper conductors with a cross-section of 2 x 4 mm².

This design is based on a fundamental physical principle: high frequencies travel mainly on the surface of conductors, a phenomenon known as the skin effect. Silver plating therefore optimizes treble transmission by reducing surface resistance, while the large-section OFC copper ensures lossless transmission of low frequencies, which require bulk conductivity.

The high-performance transparent polymer outer sheath serves a dual purpose: it protects against electromagnetic interference while allowing visual inspection of the conductors. This transparency also reflects the manufacturer’s confidence in the quality of its internal components.

Premium Connectors and Finishes

The four banana plugs supplied with the Bi-Tech 4.4 B exemplify the attention to detail. Machined entirely from solid metal and coated with 24-carat gold plating, they ensure minimal contact resistance and long-lasting protection against corrosion. This high-end connectivity eliminates the weak points commonly found in budget plugs that use plastic inserts.

Factory assembly of the connectors eliminates wiring errors and guarantees optimal soldering quality. This approach is especially valuable for bi-amplification, where even the slightest polarity or phase inversion can compromise the system’s tonal balance.

Specialized Conductor Technologies

The use of silver-plated copper for the midrange and treble is not just a marketing gimmick. Silver plating significantly improves surface conductivity, a critical area for high-frequency propagation. This technology allows you to benefit from the exceptional properties of silver without the prohibitive cost of a fully silver cable.

The conductors dedicated to low frequencies use OFC copper selected for its remarkable structural homogeneity. This crystalline purity reduces interaction between metal grains, thus minimizing distortion in the bass range. The generous 4 mm² cross-section per conductor ensures very low linear resistance, a sine qua non for bass reproduction without dynamic compression.

Sonic Advantages and Applications

In practice, this architecture results in clearer frequency separation and reduced intermodulation. The bass gains in definition and impact, while the midrange and treble benefit from increased transparency and improved detail. This approach is particularly beneficial for high-end three-way speakers, where complex filtering can mask certain subtleties.

The cable supports amplifiers delivering up to 350 watts per channel, clearly positioning it in the high-power system segment. This capability makes it an appropriate choice for demanding home theater installations or reference high-fidelity stereo systems.

Technical Specifications

Connectivity

• 4 solid metal banana plugs, 24-carat gold-plated
• Signal direction: bidirectional (input / output)

Conductors and Wiring

• Midrange / treble conductors: 2 x 2.5 mm² silver-plated copper (SPC)
• Low-frequency conductors: 2 x 4 mm² oxygen-free copper (OFC)
• Total cross-section: 2 x 2.5 mm² + 2 x 4.0 mm²
• Conductor material: oxygen-free copper (SPC / OFC)

Electrical Specifications

• Maximum power: up to 350 watts
• Type: bi-amplified speaker cable

Construction and Materials

• Geometry: round cable
• Insulation material: plastic
• Colors: blue / copper

Performance and Features

• Very high flexibility
• High-fidelity sound: powerful bass, precise treble
• Reliable contact

General Information

• Warranty: 30 years
• Manufacturing: German (made in Germany)