Presenting the m501, Grace Design's 500 series module version of the venerable m101 mic preamplifier. Now the signature transparency and detail of our circuit designs is available for your 500 series frame.

While the 500 series market has plenty of colored mic preamplifier options, the natural, musical clarity of the m501 makes it a welcome addition to the field. This circuit is for engineers confident with the quality of the source, mic section and placement, and wish to capture it with as little coloration or distortion as possible.

The m501 module is a balanced, transformerless design, with 48V phantom, a 75Hz HPF and a 1/4” HI-Z instrument input. Also standard is our exclusive ribbon mic mode, which raises the mic input impedance, bypasses the input decoupling capacitors and deactivates 48V phantom to protect delicate ribbon mics from damage.

Key Features:

• Fast & musical transimpedance architecture
• Precision audio path with 0.5% precision metal film resistors
• 12 position gold plated rotary gain switch
• High performance output line driver amplifier & HPF amplifier
• Ribbon mic mode (also great for dynamic mics) - Relay bypass of phantom power decoupling capacitors, increased input impedance & 48V lockout
• Wide 10-75dB gain range
• Enhanced RFI interference suppression
• Three output connectors: XLR balanced, TRS balanced & ¼” unbalanced
• Bombproof laser-etched black anodized frontpanel
• Sealed gold contact relay for Hi-Z input switching
• Led indicators for +48V, Ribbon mode & HPF