ProFM Broadcast - Sonifex RB-HD2 RedBox Headphone Amplifier
Sonifex at Pro FM Broadcast

Sonifex Redbox RB-HD2 Headphone Amplifier

$464.40

Sonifex Redbox RB-HD2 Headphone Amplifier

The RB-HD2 is a high performance 2-way stereo headphone distribution amplifier for driving up to 2 pairs of professional stereo headphones from a single stereo or mono input. A switch on the rear panel enables the distribution of a mono signal to all four outputs (i.e. both earpieces of a pair of stereo headphones) via the left channel input. The stereo/mono switch is located on the rear panel to prevent accidental knocking.

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Category: SKU: 415

Description

Sonifex RedBox RB-HD2 Dual Stereo Headphone Amplifier

Sonifex RedBox RB-HD2 Dual Stereo Headphone Amplifier. Engineered for precision and versatility, this amplifier enhances your audio setup with its advanced features and exceptional sound quality.

Equipped with electronically balanced XLR-3 inputs, the RB-HD2 ensures optimal signal integrity for your audio sources. Whether you’re using balanced or unbalanced wiring, you can count on reliable performance and clear audio reproduction.

Conveniently located on the rear panel, two pre-set controls allow you to fine-tune the level of the master input signal to the outputs. This gives you precise control over your audio levels, ensuring the perfect listening experience every time.

Each output of the RB-HD2 is connected via a ¼” stereo jack socket, designed to drive 150mW into a wide range of stereo headphones, from 32 ohms to 600 ohms. This versatility makes it suitable for various headphone types, providing ample power for optimal sound reproduction.

Furthermore, the outputs are individually buffered, with their own front panel volume control. This allows you to customize the volume levels for each headphone independently, catering to different preferences and ensuring personalized listening experiences.

Additionally, a LED power indicator located on the front panel provides a visual confirmation of the power supply connection, giving you peace of mind and ensuring that your amplifier is operational at all times.

With its robust construction, advanced features, and exceptional sound quality, the Sonifex RedBox RB-HD2 Dual Stereo Headphone Amplifier is the perfect choice for professional audio applications, including studios, broadcasting, and live sound environments. Experience unparalleled performance and elevate your audio experience with the RB-HD2.

Technical Specification For RB-HD2
Audio Specification
Input impedance: >20kΩ balanced bridging (main)
Max Input Level: 28dBu
Input Gain Range: -12dB to 20dB gain (pre-set pots)
Output Level: Drives 150mW into 32Ω to 600Ω headphones
Volume Controls: -80dB to 11dB gain
Connections
IMain Stereo Inputs: 2 x XLR 3 pin female (balanced, can be unbalanced)
Outputs: 2 x ¼” (6.35mm) A-gauge 3-pole stereo jack sockets
Mains Input: Filtered IEC, switchable 110-120V, or 220-240V, fused, 9W max
Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC)
Anti-surge fuse 250mA 20 x 5mm (115VAC)
Equipment Type
RB-HD2: Dual stereo headphone amplifier
Physical Specification
Dimensions (Raw): 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
19” (W) x 4.3” (D) x 1.7” (H) (1U)
Dimensions (Boxed): 53cm (W) x 20.5cm (D) x 6cm
21” (W) x 8” (D) x 2.4”
Weight: Nett: 1.35kg Gross: 2.0kg
Nett: 3lbs     Gross: 4.4lbs
Discription

Sonifex RedBox RB-HD2 Dual Stereo Headphone Amplifier

Sonifex RedBox RB-HD2 Dual Stereo Headphone Amplifier. Engineered for precision and versatility, this amplifier enhances your audio setup with its advanced features and exceptional sound quality.

Equipped with electronically balanced XLR-3 inputs, the RB-HD2 ensures optimal signal integrity for your audio sources. Whether you’re using balanced or unbalanced wiring, you can count on reliable performance and clear audio reproduction.

Conveniently located on the rear panel, two pre-set controls allow you to fine-tune the level of the master input signal to the outputs. This gives you precise control over your audio levels, ensuring the perfect listening experience every time.

Each output of the RB-HD2 is connected via a ¼” stereo jack socket, designed to drive 150mW into a wide range of stereo headphones, from 32 ohms to 600 ohms. This versatility makes it suitable for various headphone types, providing ample power for optimal sound reproduction.

Furthermore, the outputs are individually buffered, with their own front panel volume control. This allows you to customize the volume levels for each headphone independently, catering to different preferences and ensuring personalized listening experiences.

Additionally, a LED power indicator located on the front panel provides a visual confirmation of the power supply connection, giving you peace of mind and ensuring that your amplifier is operational at all times.

With its robust construction, advanced features, and exceptional sound quality, the Sonifex RedBox RB-HD2 Dual Stereo Headphone Amplifier is the perfect choice for professional audio applications, including studios, broadcasting, and live sound environments. Experience unparalleled performance and elevate your audio experience with the RB-HD2.

Specifications
Technical Specification For RB-HD2
Audio Specification
Input impedance: >20kΩ balanced bridging (main)
Max Input Level: 28dBu
Input Gain Range: -12dB to 20dB gain (pre-set pots)
Output Level: Drives 150mW into 32Ω to 600Ω headphones
Volume Controls: -80dB to 11dB gain
Connections
IMain Stereo Inputs: 2 x XLR 3 pin female (balanced, can be unbalanced)
Outputs: 2 x ¼” (6.35mm) A-gauge 3-pole stereo jack sockets
Mains Input: Filtered IEC, switchable 110-120V, or 220-240V, fused, 9W max
Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC)
Anti-surge fuse 250mA 20 x 5mm (115VAC)
Equipment Type
RB-HD2: Dual stereo headphone amplifier
Physical Specification
Dimensions (Raw): 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
19” (W) x 4.3” (D) x 1.7” (H) (1U)
Dimensions (Boxed): 53cm (W) x 20.5cm (D) x 6cm
21” (W) x 8” (D) x 2.4”
Weight: Nett: 1.35kg Gross: 2.0kg
Nett: 3lbs     Gross: 4.4lbs

Additional information

Weight 3 kg
Dimensions 59 × 23 × 8 cm

Brand

Sonifex

Sonifex  Sonifex at Pro FM Broadcast

Sonifex is a Private Limited Company owned by the Directors, which manufactures broadcast audio equipment for the radio, TV, security and telecommunications industries. This is a family business, started as a partnership in 1969 by Paul and Dorothy Brooke, which has had a steady turnover of trading, and has established a recognised position in the radio broadcasting industry. The company became a limited company in 1983 and the operation moved to new purpose built premises at Irthlingborough, Northamptonshire, during 1986. In 1987, the size of the premises was doubled to 11,000 square feet of production space with excellent working conditions and facilities for recreation. An extension was completed in February 1998, adding another 7,000 ft² of engineering and storage space. Over 90% of British radio broadcast studios have in the past used some form of Sonifex equipment and the company exports on average 50% of its products. Sonifex supplies equipment to over 60 countries world-wide and is recognised for the quality and reliability of its designs and finished equipment.
Sonifex at Pro FM Broadcast

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