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RD-47 Retro Mic/Line Preamp  

Retro Style Open Chassis

Perfect for DIY Cabinet Builders!

  

Model No. RD-47
Series: Open Chassis Mic/Line Preamp                

 

Pro Audio Pure Tube Microphone/Line Preamp

Price: MSRP................. $695.00

25% Off Sale Price - $521.25

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RD-47 Mic/Line Preamp 

2U Rack Mount Chassis Chassis 

  

Model No. RD-47RM
Series: Rack Mount Mic/Line Preamp                  

 

Pro Audio Pure Tube Microphone/Line Preamp

Price: MSRP................. $895.00

25% Off Sale Price - $671.25

Overview:

The  FRENZEL RD-47 microphone/line 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  ECC83 dual triode output with rock solid level control enhanced by  power supply voltage regulation.

Standard Features:

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

  • HI-Z Direct Input 1/4" jack high impedance instrument input on front panel.

  • 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  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 10"D x 3.5"H 

  • Tubes:  2 - ECC83

 

FRONT PANEL:

        HI-Z DIRECT INPUT JACK

        FINE GAIN CONTROL
        VOLTAGE  DB LEVEL SWITCH
        POLARITY SWITCH
        RUMBLE FILTER SWITCH
        PILOT LIGHT
        POWER SWITCH

REAR PANEL:

        POWER CORD
        FUSE
        BALANCED XLR LOW IMPEDANCE  OUTPUT 

        HI-Z  1/4' HIGH IMPEDANCE OUTPUT JACK
        BALANCED XLRLOW IMPDEANCE  INPUT     


Specifications:

  • Input Impedance: Balanced XLR 600 ohms

  • Output Impedance: Balanced XLR 600 ohms & HI-Z 50,000 OHM

  • Sensitivity: 5 mv

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

  • Frequency Response: 30 -15,000 hz

  • 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: ECC83

  • High Voltage Regulated: High Stability and Accuracy

  • Input/Output Transformers:  Balanced and Shielded For Ultra Low Noise

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

  • Chassis: Custom 2U Ventilated Rack Mount Chassis

  

Wiring View:  Hand-wired point-to-point for long-life and reliability.

Sample Images - Wiring Design May Vary Depending On Upgrades

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:

Jim,  This RD47 pre sounds fantastic.  Planning to record flutes, lute and violin towards the end of the  month for a film I am currently scoring and will send you more feedbacks. So far, on vocals, small percussion and frame drums (Bodhràn and Native drums) it was excellent. Sounds a bit sensitive when they source is aggressive or rich in low end, but I guess it’s typical? My everyday mic is a Telefunken Copperhead. Happy Sunday   Leo-Z- Composer, Producer, Performer (Los Angeles, CA)

 

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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