The Grace Design m108 is a rack-mountable eight-channel preamplifier and ADC providing connection points for eight microphones on the rear panel, as well as two Hi-Z instrument inputs on the front. With this unit, you can either achieve analog amplification through its transformerless, transimpedance design, or utilize its on-board conversion stages to route signal into your DAW in a variety of digital output formats, including AES, ADAT, and USB. The unit is also remote-controllable, able to receive commands from Grace's m802 remote control unit or Pro Tools via on-board 485/422 serial / MIDI ports.

Its push-button rotary knob handles the navigating and instantiation of various operations, though dedicated push-buttons are assigned for essential needs, such as 48V phantom power switching, phase reversal, channel grouping, and clearing peaks on the meter. A headphone output with integrated headphone amplifier allows for low-latency monitoring of assignable channel pairs, or for listening to USB playback from a source-computer.

The m108 features word clock I/Os and optional expansion slots to interface with Dante networks. Furthermore, this device is compatible with m802s, so you integrate this unit into any existing m802 system

8-Channel Preamp & ADC + CR Output Card    Mic and Hi-Z Inputs    Gain Range of -8 to 74 dB    Transformerless Preamp Design    48V Phantom Power, Phase Reversal    Multiple Digital I/Os: AES, USB & More    External Word Clock I/Os    RJ45 Ethernet Port    RS 485/422 Serial / MIDI Ports    1 RU Rackmount Unit

• 8 channels of balanced analog preamp outputs
• 8 mic preamplifiers
• Gain range of -8 to 74 dB
• Ribbon mic mode
• 8 channels of 192 kHz ADC outputs via AES, ADAT (4ch SMUX) and USB Class 2
• External Word clock in and out
• Reference DAC and headphone amplifier for low-latency monitoring of channel pairs or USB playback from a computer
• Channel 1 and 2 Hi-Z inputs on front panel
• High contrast, wide viewing angle OLED display for all system parameters and setup menu
• Combination RS 485/422 serial / MIDI ports for control from existing m802 RCU or Pro Tools
• RJ45 Ethernet port for network control
• Expansion slot for optional Audinate / Dante network audio card
• On-board Cooling fan
• Built-in 100-240 VAC power supply
• Made in the USA

Related Questions and Answers

Q: 1. This preamp have warranty?

A: This mic preamp comes with a five year, transferable warranty from Grace Design.

Q: 2. Is this the older model that comes in a silver box or the newer one that comes in a black box?

A: it came with a black box

Q: 3. External DAC drive these like Cambridge, well I still need a headphone amp?

A: If the DAC can handle 300-600 ohm headphones, then you would not need amp amp.

Q: 4. Are these $100 better than the HD600s?

A: I will address some of these questions I see here. Some posters would have you waiting forever for a price drop. I haven't listened to the HD600s. I find the HD650S well worth the money. I find them comfortable to wear and I have a big head.The sound is superior to the HD598s which I do own. The one drawback to the 650's is that the cord is long and bulky. You will also need an adapter to use them on a phone or tablet. This would also apply to the HD600s as well. To me either these headphones are in your price range or they are not. If not look elsewhere for cheaper.

Q: 5. Must i use it only with amplifier or it good works with directly PC soundcard?

A: Most PC sound cards will not drive these 300 Ohm headphones. Use a headphone amplifier.

Q: 6. can I use ui 16 as a stagebox?

A: The Ui16 is a mainly a mixer which is meant to be placed on, or near the stage, and controlled via a tablet or PC. This will not interface as a digital snake for other mixers.

Q: 7. can you link two sound craft ui boxes to create double the inputs?

A: You could always run the output of one mixer into the other, but you'd only be able to control one at a time with a single device. If the UI16 is not big enough for you, consider a larger (and more expensive) mixer.

Q: 8. Is this HD650 comes with black or silver drivers? There is a sound quality improvements with the silver ones. Thank you very much!

A: All the critical parts I can see on either side are silver/metallic. There is plenty of black plastic in there, too, but it all looks like structural support for the silvery parts. I took off the earcup padding and thin foam cover, but that's as much disassembly as I feel safe doing.

Q: 9. Will these work with the new Cambridge dac, from the headphone jack of the PC?

A: These headphones would work with a DAC such as the DACMagic 200M BH #CAC11217.

Q: 10. Are the cables removable/replaceable?

A: Yes."Specially modulated connecting cable (detachable) made from highly conductive OFC copper, with very-low handling noise"