German design of the 1960s,The Grundig GDM 313 is a compact dynamic microphone built for home recording, dictation, and semi-professional applications. stylish and functional too. The 313 has become a collectible not just for its looks, but also for its surprisingly usable tone once properly restored and upgraded.

OPTICAL CONDITION
used excellent —MINT.

body and grille show minimal signs of wear, generally well preserved

TECHNICAL CONDITION
Fully functional. Capsule tested and working perfectly. Refurbished with modern XLR connection for easy use.

COMES WITH

Original Grundig presentation box

Matching microphone holder

BUILD & DESIGN

Despite its small size and plastic housing, the microphone feels unusually heavy in the hand. This weight comes from its internal transformer, mounted inside the body to adapt impedance and improve compatibility with recording devices of its time. The microphone comes with a permanently attached cable

TECHNICAL SPECIFICATIONS

• Type: Dynamic microphone
• Polar Pattern: Cardioid (approximate)
• Connector: Modified to XLR
• Output: Unbalanced
• Finish: Brushed silver body with black grille
• Manufactured: Germany, mid-1960s

Frequency Response:

80 Hz – 12,000 Hz

• Presence bump around 4–6 kHz
• Gradual roll-off above 10–12 kHz
• Gentle bass roll-off below 120 Hz

SOUND CHARACTERISTICS

The Grundig 313 was never intended as a studio flagship, but once modified to XLR and carefully refurbished, it produces a clear and mid-forward sound. The presence bump makes it particularly effective for speech and spoken word recordings, while its rolled-off lows and highs give it a distinct vintage character. In a music production setting, it can add unique color for lo-fi vocals, guitar cabinets, or snare close-miking when a more focused tone is desired.

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