Radial Engineering McBoost Microphone Signal Intensifier

Mic Signal Booster, Class-A FET with 25dB Gain, Load Adjust and Filter

The Radial McBoost is a high performance microphone signal booster designed to elevate the output of a typical dynamic microphone for greater transient response and boost the signal of a low-output ribbon mic to bring it up to a usable level for mixing consoles or preamps that may not provide sufficient gain.

The 100% discrete class-A circuit design begins with a dual-transistor J-FET circuit to produce up to 25dB of gain without introducing noise, color or artifact. Each individual transistor is carefully measured and batch-sorted to comply with the design specification to certify performance. As with all Radial products, the circuit board is then loaded into a 14-gauge, I-beam, reinforced steel enclosure to prevent outside stress from torquing which otherwise could lead to premature part failure. A book-end cover creates protective zones at each end to safeguard the switches, potentiometer and connectors from the rigours of the road.

Merely connect the McBoost in-line using standard 3-pin XLRs and activate 48V phantom to provide power. Select between three impedance settings to optimize the response and then reduce low-frequency clutter with the 3-position high-pass filter. The McBoost will elevate the output to produce added clarity, excitement and extra drive for long cables whether you are in a recording studio, on a live concert stage or in a broadcast center.

Features:

• 25dB signal booster for dynamic & ribbon mics
• Extends dynamic range and microphone reach
• Uses standard 48V phantom for power
• 3-position load switch and high-pass filter

Specifications:

• Audio circuit type: Class-A Differential FET/Bipolar Hybrid
• Frequency response: 7Hz to 30kHz
• Total harmonic distortion: 0.005% @-30dB
• Dynamic range: 105dB
• Maximum input: -6dBu
• Maximum gain: +25dB
• Equivalent input noise: -120dBu
• Input impedance: 600 Ω, 2.7k Ω, 30k Ω
• Clip level - input: -17dBu / -14Bu / -9dBu
• Clip level - output: +10dBu
• Noise floor: -95dBu / -98dBu / -113dBu
• Output impedance: 2.2k Ω
• Intermodulation distortion: 0.01%
• Phase Deviation: 0° @ 20Hz, <10° @ 20kHz
• Features
• Gain control: Variable from +4dB to +25dB
• High-pass filter: 100Hz and 55Hz @-3dB
• Filter slope: 6dB / Octave
• XLR configuration: Pin 2 + / Pin 3 - / Pin 1 Ground
• General
• Construction: 14 gauge steel chassis & outer shell
• Finish: Durable powder coat
• Size: (L x W x H) 4.2" x 2.76" x 1.68" (106.7 x 70.1 x 42.7mm)
• Weight: .5 lbs (0.23kg)
• Shipping size: (L x W x H) 6.25" x 4.25" x 3" (158.7 x 108 x 76.2mm)
• Shipping weight: 1.4 lbs (0.64kg)
• Power: 48V phantom
• Conditions: For use in dry locations only between 5°C and 40°C
• Warranty: Radial 3-year, transferable