Radial Engineering McBoost 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 to 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 26 dB 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

• 26 dB 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 DC coupled FET
• Frequency Response: < 7 Hz to > 30 kHz
• Dynamic Range: 116 dB
• Gain: +26 full gain, +20 half gain, +4 to +25 dB variable gain
• Clip Level: +16 dBu (output)
• Total Harmonic Distortion: 0.006%
• Intermodulation Distortion: 0.01%
• Phase Deviation: < 10°
• Common Mode Rejection Ratio: -125 dBu
• Equivalent Input Noise: -125 dBu
• Noise: -100 / -110 dBu
• Input Connector: XLR female
  • Impedance: 600 Ω / 2.7 kΩ / 30 kΩ
• Output Connector: XLR male
  • Impedance: 220 Ω
• Construction: Cold Rolled Steel
• Power: +48V phantom power
• Conditions: For use in dry locations only, 5-40°C
• Dimensions (H x W x D): 1.75" x 2.75" x 4.25"