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RD-47 Mic Preamp  

  

Model No. RD-47
Series: Preamp                  

 

Pro Audio Pure Tube Microphone Preamp

Price: MSRP................. $595.00

25% Off Sale Price - $446.25

Overview:

The  FRENZEL RD-47 microphone tube preamp is part of our "INSPIRED" line of products.  It was inspired by the classic vintage 1959 EMI REDD47 microphone  tube preamp that was used by the Beatles to record their early albums at the Abbey Road Studio in London, England...but the RD-47 is not a clone. Control features were added that were not available on the original preamp to provide more tone and level control. Exceptional clear warm tones produced by a classic ECC83 voltage amplifier driving a vintage ECC81 dual triode output with rock solid level control enhanced by  voltage regulators.

Standard Features:

  • Balanced XLR Input & Output Jacks isolated from chassis to eliminate eddy currents and hum.

  • DC on filaments to eliminate 60 hz hum.

  • Star ground system to eliminate induced current chassis noise.

  • Rumble filter

  • Polarity switch

  • DB calibrated Boost level switch

  • DB calibrated  Gain control

  • Preamp tubes are ECC83 AND ECC81 known for low noise and linearity

  • Regulated power supply

  • Classic Knobs and Toggle Power Switch

  • Standard IEC plug-in three prong grounded power cord. 

  • Rock solid point-to-point hand wiring using only the best of parts...low noise tubular polypropylenes caps, metal film resistors, Micalex sockets, Neutrik  jacks...etc.

  • 2U Rackmount Chassis

  • Weight - 10 lbs. 

  • Dimensions - 19"W x 12"D x 3.5"H 

  • Tubes:  1 - ECC83- ECC81 

 

FRONT PANEL:

        GAIN
        VOLTAGE BOOST DB
        POLARITY
        RUMBLE FILTER
        PILOT LIGHT
        POWER SWITCH

REAR PANEL:

        POWER CORD
        FUSE
        BALANCED XLR OUT 
        BALANCED XLR IN    


Specifications:

  • Input Impedance: Balanced XLR 200 ohms

  • Output Impedance: Balanced XLR 200 ohms

  • Sensitivity: 5 mv

  • Voltage Boost: Selectable 34 db – 40 db - 46 db

  • Gain Control Range: -20 db to  0 db for each Boost Level

  • Polarity Control: Normal – Reverse

  • Rumble Filter: On – Off

  • Voltage Amplifier: ECC83

  • Output Driver: ECC81

  • High Voltage Regulated: High Stability and Accuracy

  • Input/Output Transformers: Low Noise Shielded

  • Power: 120 VAC (Upgrades available for 100 – 240 VAC operation outside USA)

  • Chassis: Custom 2U Ventilated Rack Mount Chassis

  

Upgrade Options:

These options allow you to  customize your amp to meet your special individual requirements.

1. 240 VOLT POWER TRANSFORMER - for operation outside the USA.  Add $55.00  

 

Reviews:

Dear Mr. Frenzel -  I received the preamp. It works well. Thank you. Mahdi J. (Tabeth Sharon,  Israel)

For more reviews please check our Customers Reviews page.  

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