Grace Design m101 (2008)
A single-channel microphone preamplifier released in 2008, designed and built in Colorado.
Overview
The Grace Design m101 is a single-channel microphone preamplifier released in 2008 as a retooling of the company's successful Model 101. Built in Colorado, it features a balanced, transformerless design with transimpedance amplifier architecture intended to deliver musical quality without integrated circuits. The unit contains no user-serviceable components and must be returned to Grace Design for repair or upgrades.
Specifications
| Product type | Single Channel Microphone Preamplifier |
| Production year | 2008 |
| Weight | 2.4 lbs / 1.09 kg |
| Dimensions | H: 1.7” (4.3 cm), W: 8.5” (21.6 cm), D: 9.0” (22.8 cm) |
| Power Consumption | 100-240VAC, 5 Watts Max |
| Input type | Hi-Z |
| Gain Range | 5dB Steps |
| Circuit topology | balanced, transformerless, transimpedance circuit topology |
| Signal path components | 0.5% precision metal |
Design
The m101 uses a transimpedance amplifier architecture with a balanced, transformerless signal path incorporating 0.5% precision metal components. It was designed to achieve musical quality without relying on integrated circuits. The unit contains no user-serviceable parts and requires factory service for repairs or modifications.
Context
The m101 represents a retooling of the original Model 101 microphone preamplifier and is part of a product family that includes the m102 Compressor and the m103, referred to as its "cousin." It was positioned as a high-end single-channel preamp for under $1000 at release.
Market
Used units have been listed around $497 to $874, with some stereo pairs selling for $1,885. One listing noted both the m101 and m103 were priced "well under market," suggesting higher typical resale values.
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