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Grace Design m103

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Channel Strip - mic preamplfiier / 3 band EQ / optical compressor
 

We proudly present the m103 channel strip.

It 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.

 

Features

-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

Mic Amp Section Measured at Mic Amp Output
 
GAIN RANGE (5dB steps)
 
Mic input
10-65dB
Hi-Z input
-10-45dB
THD+N 1kHz, 22Hz-22kHz BW
 
@ 20dB Gain +20dBu out
<0.00085%
@ 40dB Gain +20dBu out
<0.0010%
@ 60dB Gain +20dBu out
<0.0050%
INTERMODULATION DISTORTION
 
@ 40dB Gain +20dBu out  
SMPTE/DIN 4:1 7kHz/50Hz
<0.0020
NOISE - REFERRED TO INPUT@60dB Gain 22Hz-22kHz BW
 
50? source
<-130dB
150? source
<-128dB
600? source
<-124dB
CMRR @60dB Gain, 3.5Vcm
 
100Hz
>60dB
1kHz
>75dB
10kHz
>65dB
FREQUENCY RESPONSE
 
Mic input @ 40dBm Gain -3dB
3.7Hz-140kHz
Hi-Z input @ 20dB Gain -3dB
1.2Hz-112kHz
IMPEDANCE
 
Mic input
8.1kΩ
Mic input, Ribbon mode
20kΩ
Hi-Z input (unbalanced)
2.5MΩ
Hi-Z input (balanced)
5MΩ
Balanced Output
300Ω
Unbalanced Output
150Ω
PEAK LED METER
 
Green threshold
-10dBu
Red threshold
+16dBu
MAXIMUM OUTPUT LEVEL
 
100k Ohm load, 0.1% THD
+28dBu
EQ/COMP Section
 
GAIN RANGE
 
Output Trim
-10 - +10dB
EQ: 3 Bands of 0-12dB Cut or Boost
 
Low Frequency Range
20Hz 750Hz
Mid Frequency Range
500Hz 4kHz
Mid Frequency Q
0.5 - 5
High Frequency Range
3kHz 20kHz
Low and High Frequency Peak/Shelf switches  
Compressor Inserts Pre or Post EQ
 
Threshold Range
-15 - +15 dBu
Attack Range
3 - 200 ms
Release Range
0.03 - 3 s
Ratio Range
1:1 12:1
Gain Reduction
0 10dB
Output
THD+N 1kHz, 22Hz-22kHz BW
 
@ 0dB Gain +20dBu out
<0.002%
INTERMODULATION DISTORTION @ 0dB Gain +20dBu out
 
SMPTE/DIN 4:1 7kHz/50Hz
<0.002%
OUTPUT NOISE 22Hz-22kHz BW
 
@0dB Gain
<-78dB
CMRR @0dB Gain, 3.5Vcm
 
100Hz
>75dB
1kHz
>75dB
10kHz
>75dB
FREQUENCY RESPONSE
 
@0dB Gain -3dB
0.016Hz-150kHz
IMPEDANCE
 
Line In
24kΩ
Main Out balanced
350Ω
Main Out unbalanced
150Ω
Link In sidechain mode
100kΩ
LEVEL METERS
 
EQ Peak threshold
6 dB below interstage clipping
Output Level VU Meter
0dB VU = +4dBu output
Gain Reduction Meter
0-10dB Gain Reduction
MAXIMUM OUTPUT LEVEL
 
100k Ohm load, 0.1% THD
+28dBu
WEIGHT and DIMENSIONS
 
4.5 lbs
H1.7" x W19" x D9"
2.05 kg
H4.3cm x W48.3cm x D22.9cm
POWER CONSUMPTION
 
85-264VAC / 120-370VDC
14 Watts Max

 

I've been very impressed by the Grace Design M103 channel strip...the sound quality proved to be exactly what I'd expect from a Grace Design product: dynamic, transparent, musical and very revealing of its sources.

Sound On Sound

Read the complete review here

 

 

Without a doubt, the m103 channel strip is a winner. It is as clean and pristine as you would expect from Grace Design with a sweet EQ and smooth compression....

Its flexible design, clarity and super-accurate sound have made it a permanent part of my acoustic mic pre arsenal. Yep, I bought it!

Pro Sound Network

Read the complete review here

 

 

...consider investing in an m103, which will afford you the ability to capture the true color of the source and the dynamic detail of the performance

TapeOP

Read the complete review here

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