Telefunken U48 - Classic Tube Condenser Microphone
The Telefunken U48 is a tube condenser microphone that was originally introduced 10 years after the U47. The U48 shares the same specifications and components as the U47 but with the addition of a Figure of 8 polar pattern that replaces the U47's Omni pattern.
The Telefunken U48 features the M7 capsule which had been developed in 1928 by Georg Neumann and was used in the original U48's. To this capsule was added an amplifier built from military surplus VF14 tubes (they had been used in field and aircraft radios), and BV8 output transformers. The combination of these components created a sonic quality that was absolutely unheard of in the English speaking world of the mid-1940s when darker sounding, less detailed ribbon microphones were the standard.
The Telefunken U48 is a great choice of microphone for a wide range of applications and can most famously be heard on George Martins recordings of The Beatles.
Telefunken U48 Specifications:
- Type: Condenser Pressure Gradient
- Capsule: M7
- Frequency Range: 20Hz / 20kHz
- Polar Pattern: Cardioid and Figure 8
- Sensitivity: 24.5 mV/pa +/- 1 dB
- THD at 1kHz at 1Pa: <0.3%
- Output Impedance: <400 ohms
- Maximum SPL: 127dB
- Non Linear Distortion: less than or equal to 0.5% at 100 dyne / cm sq
- Self Noise: 9.5dBa +/- 1dB
- Tube Type: VF-14K
- Power Type: Dedicated American-made power supply with slow-ramping filament voltage
- Size: 9 3/4" (248mm) length x 2 1/4" (57mm) diameter
- Weight: 22oz (624g)
- Supply Current: <45mA
- Connected Via: Large Tuchel/Historic stand mount swivel, XLR-3 (M) output
- Supplied Accessories: Locking flight case, power supply, wooden mic box, clasping shock mount, 25' Accusound quad-shielded cable with swivel connector