*G.I.M.I.C 2nd Generation Motherboard [#p028d7cf]
G.I.M.I.C's core - a motherboard that can be loaded with a sound chip module.~

#ref(GMC-MB2_PCB.jpg)

#contents

**Lineup [#q6be34a4]

G.I.M.I.C motherboard comes in three editions. Choose the one that most fits your needs.~
-Lite : a low cost, more easily affordable model (release scheduled in April 2014)~
-Standard : for those who want basic functions of G.I.M.I.C~
-Professional : for those who seek higher sound quality and versatility~

See the comparison chart below for further information.

**Features [#wa0ae0bf]

- ''Built-in Preamp''~
A preamp with a low noise characteristic is used so as to minimize sound degradation.~

-''Carefully selected components''~
We made no compromise in abundantly using carefully selected, excellent grade components.~
The analog circuitry has undergone repeated trial productions and critical listening, all the while retuned and refined to bring out the sound chips' potential to the maximum.~

- ''Spacial case available'' (not included)~
Specially redesigned version of Abee cubic NE02 is available for the encasement of GMC-MB2.~

- ''LT: Onboard FM sound chip''~
Lite edition is equipped with an onboard FM sound chip, so that it can be used without sound chip modules.~
Of course, you can still install the G.I.M.I.C sound chip modules just as in Standard or Pro editions.~

- ''STD/PRO: Support for PCM''~
Standard and Pro motherboard can play PCM without the aid of a sound chip module.~
We used an audio codec of a high grade that is made use of in market production audio equipment,~
to realize a sound with a sharpness that blends in modern audio environments.~
'''(Firmware to enable this feature is currently under development; upgrade will be available for download as soon as it is implemented)'''~

- ''STD/PRO: Better pop-up noise suppression''~
Standard and Pro motherboard are equipped with a circuit for the specific purpose of pop-up noise suppression.~
(Pro motherboard has a pair of noise suppression circuits: one for the output from motherboard's 3.5mm jack, another for the output through the Breakout port)~

-''STD/PRO: Headphone amplifier''~
The analog circuitry has (apart from the codec) a driver amplifier for headphones.~
This enables high impedance headphones like Sennheiser HD800 to work properly,~
at the same time improving S/N ratio to make the sound even clearer.

-''STD/PRO: 4-layer circuit board''~
We used a high-end 4-layer circuit board not commonly seen in indie hardware, to allow G.I.M.I.C to work in its full potential.~

-''PRO: ability to work on both USB bus power and on external power supply''~
While all the three editions run on USB bus power, Pro edition can be fed its power also from an AC adaptor.~
When thus running on external power supply, Pro motherboard activates its function to cut off noise originating in the USB circuit, vastly increasing the S/N ratio.~

-''PRO: Breakout port'' (not included)~
ALVA BF-BOCMKH breakout cable can be connected to open up additional connections, namely:~
Line I/O (unbalanced), MIDI I/O, and a 6.5mm stereo output.~

-''PRO: USB hosting''~
Pro motherboard is equipped with a USB standard-A port, through which G.I.M.I.C can be connected to external USB devices, such as ten-keys.~

**Comparison chart [#gfbf9939]
The Professional edition is a model that aims at a higher sound quality with less noise.~
Compared to those in STD, the components in PRO motherboard are higher in quality and almost twice in number.~

The Lite motherboard on the other hand, while lacking the ability to play PCM, has an unique feature of a built-in FM sound chip, which enables it to be used without installing any sound chip modules, making this edition highly affordable.~
||LT|STD|PRO|
|PCM|no|yes|yes|
|Preamp|yes|yes|yes|
|Sound Quality|good|very good|excellent|
|MIDI|no|no|yes|
|Parallel-out|no|no|yes(2 paths)|
|DC In|no|no|yes|
|USB hosting|no|no|yes|
|Built-in FM chip|yes|no|no|

**Technical Specifications (PRO) [#a11d699f]
'''Specifications are subject to change without prior notice'''

-Dimensions (W x H x D)~
--4.0" x 4.0" x 1.3" (102 mm x 102 mm x 35 mm) with a sound chip module installed~
-Weight~
--c. 2.3 oz. (65 g) not including the weight of set screws / harnesses~
-Power supply~
--USB bus power, or 5V AC adaptor with a minimum of 1000mA current~
'''Using an AC adaptor with a voltage exceeding 5.2V can cause damage to the hardware.'''~
'''(We recommend using an AC adaptor shipped with audio equipment, e.g. AC-E5212 , PSP-100)'''~
-Power consumption~
--c. 2.5W (variable depending on the type of the module installed)~
-Connectors~
--External Power IN~
EIAJ #2 DC jack (center positive)~

--USB~
USB device hosting: USB(A)X1~
Connection with PC: microUSB(B)x1~

--Audio OUT~
3.5mm stereo-mini jack~

--Breakout~
D-SUB15P(HD)x1~
Connected to ALVA BF-BOCMKH, the breakout port enables the connections below~
---Line OUT x 4 (2 stereo paths; parallel out, or output through the preamplifier)~
RCA jack (unbalanced)~

---MIDI INx1 OUTx1~
5-pin DIN jack~

---Headphone out (mutually exclusive with the 3.5mm jack listed above)~
6.3mm TRS jack, unbalanced (stereo)~

-PCM~
--Wave Memory size: 2MB~
--Supported formats: PCM, ADPCM (stereo / mono)~
--Sampling rates: 8-192kHz~
--Bit depth: 4-24bit~

-Included items~
--Motherboard~
--Cable to connect a module (HOST I/F, ANALOG)~
--Connection connector for external power supply~
--Set screws~

-Electrical properties~

--DAC
---Resolution: 16bit, 24bit
---Sampling rates: 32 khz to 192 kHz
---Dynamic range: 108dBA @ 48 kHz

--Preamplifier / Headphone amplifier
---Frequency response: 20 Hz to 50 kHz (+0, -0.5 dB)
---Maximum Power Output: 130 mW + 130 mW (THD+N=1%)
---THD+N: 0.009% @ 1 kHz / 16Ω load
---S/N: 94 dB (JIS-A)

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