Grace Design M103

Channel Strip – mic preamplfier / EQ / compressor


The m103 starts with the tried and true m101 microphone preamplifier circuity. For many engineers, the
m101 is an introduction to what quality mic preamplification is all about, and the perfect starting point
for a channel strip – musical, transparent and pure. Headroom, detail, clarity – its all there. Complete
with our exclusive ribbon mic mode, a 75Hz HPF and 48V phantom.
The 3 band EQ section is built around single stage parallel tuning architecture, which minimizes circuitry
and delivers natural tonal shaping from 20Hz to 20kHz. Controls include a fully parametric mid, with
sweepable high and low bands which can be operated in shelving or peak modes. Because of its
accuracy of this design, smaller increments of cut or boost can be heard, providing a greater level of
control over tone shaping.
The compressor circuit is based on an optical attenuator – the purest, high fidelity gain control
mechanism available. It provides gentle limiting to fairly heavy compression, while remaining neutral
and transparent. The perfect way to zip it all up and send it downstream – clean, intact and alive.
10 segment gain reduction and output meters make monitoring compression and output levels simple.
The front panel accessed HI-Z input makes this an amazingly high quality instrument preamp.
Comprehensive I/O options allow the mic pre and EQ/COMP sections to be accessed independently of
each other, and the order of the EQ/COMP is switchable.
A dual function link/ sidechain input on rearpanel is provided for inserting external sidechain signals (for
de-essing, ducking) or connecting two m103's together for stereo compression applications. Predictably,
the m103 is built to last, and proudly backed by our 5 year transferable warranty. So there it is, we’ve
done it. The m103 – a channel strip by name, a powerful tool by design.
Check out a track which features m103's on overheads and electric guitars.

Fast and musical transimpedance microphone preamplifier architecture
Updated audio path with 0.5% precision metal film resistors
New 12 position gold plated rotary gain switch
High performance output line driver amplifier and HPF amplifier
Ribbon mic mode (also great for dynamic mics) -Relay bypass of phantom power decoupling capacitors,
increased input impedance, and 48V lockout
3-band presicion EQ, fully parametric mid band, peak and shelf mode for hi and low bands
newly designed optical compressor
Mic amp direct output
EQ/COMP section line input
Bombproof laser-etched black anodized frontpanel
Sealed gold contact relay for Hi-Z input switching
Built in power supply
Led indicators for +48V, Ribbon mode, and HPF
powerful 10 segment meters for gain reduction and output level
Five year transferable warranty on parts and labor
Made in the USA


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