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Mercury D Series G810 Rack System w/ G8 Sum-It (Demo Deal)

Professional 500 Series rack system offering exceptionally high power levels - includes G8 Sum-It module

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What is a Demo Deal Item?
In just about every case, a Demo Deal item is in nearly mint-condition but has be taken out of the box so a customer could take a look at it or try it for a few days. Because it is no longer factory-sealed, we offer it to you at a special price with full manufacturer’s warranty.

Regular Price: $2,108.00
Save 14.7%: -$309.00
Sale Price: $1,799.00

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Product Description
Additional Information
  • Product Description

    The Mercury D Series G810 Rack System solves the biggest complaint for users of other '500 racks' in the marketplace, lack of power. Especially when using products that are not built to the specifications of the '500' standard. The products not built to that standard take more than their share of the power to work, which, in turn, causes problems with all other modules in the rack. This is not an issue with the Mercury D Series G810 Rack System. 

    The power specification for Mercury D Series G810 Rack System is much higher than the spec of the '500' Standard. Providing more power does not solve the power problems of '500' Racks, so, Mercury successfully designed a better Power Structure not just providing more amps/watts. Mercury designed the Mercury Power Regulation Circuit as a solution to '500' Rack power problems. The Mercury Power Regulation Circuit is not only in the rack, it is on every channel of the rack offering individual regulation per channel. The Mercury D Series G810 Rack System is the first '500' Rack to have this feature and is why we feel this is not only a better rack but a better system overall. The Mercury Power Regulation Circuit allows each channel to be isolated from the channel next to it or any other channel in the rack, which will protect from faults or emissions from problematic modules. No module in the Mercury D Series G810 Rack System shares DC power with another module in the rack.

    In addition of the Mercury Power Regulation Circuit, there is also the Mercury Soft Start Circuit featured in the Mercury D Series G810 Rack System as well. The Mercury Soft Start Circuit allows power to 'ramp up' slowly and will gradually and gently apply voltage to your expensive D Series or '500 Series' modules when you power up. This is better for your modules as well it reduces the danger to woofers that could be damaged with 'turn-on' thump when part of a larger system.

    Rock Solid Construction

    The Mercury D Series G810 Rack System is simply built like a Tank. Like all Mercury Recording Equipment Co. products, the Mercury D Series G810 Rack System is engineered to be reliable and look good in your studio but built to be road-worthy.


    On the back panel of the Mercury D Series G810 Rack System - I, there are Gold Pin XLRs (for channels 1-10) and DB25 (DSUB) connectors for channels 1-8 to give you choices of how you install your system. The Mercury D Series Line will have several choices of power supplies to be able to power a single rack or several in the future. The first is the Mercury D Series PSU-1. All Mercury D Series Power Supplies feature Studio Quality, Low Noise, Linear Power designed for Audio. The D Series PSU-1 Power supply is also rack mountable or can sit on the tabletop next to the rack or on the floor etc... You can also mount two D Series PSU-1 Power Supplies together as a dual 1U unit to save valuable rack space, and there are places for optional feet on the bottom if needed.



    • Easily convertible between being rack mountable or free standing (rack and PSU) - rack ear kit requires additional purchase
    • Supports ten D Series / '500 Series' modules 
    • Proudly built in the USA
    • Mercury D Series PSU-1 included: 2.5A+ of clean, stable power
    • Mercury Power Regulation Circuit for each slot / channel
    • Mercury Soft Start Circuit
    • Heavy duty steel and aluminum chassis 
    • Shielded internal electronics inside the rack and PSU
    • Individual Gold Pin XLR connectors (ch. 1-10)*
    • Convenient DB25 connectors (ch. 1-8)* 
    • G810 chain switch for each channel
    • G810 link switch for each channel
    • Ground lift switch for quiet operation in all environments

    *You can use either or, but not both at the same time


    Choosing between System I and System II:

    Mercury D Series G810 Rack System I has all the features available in the G8 System. Mercury power structure, rack mountable or table top usability, G8 module compatible in slots 9 & 10, ground lift, chain for ch. 1-10, link ch. 1-10, XLR in/out for ch. 1-10 and DB25 for ch. 1-8.

    Mercury D Series G810 Rack System II has the same Mercury power structure, rack-mountable or tabletop usability, G8 module compatible in slots 9 & 10, ground lift, no chain function, sequential linking only ch. 1 to ch. 2, ch. 3 to ch. 4 etc., XLR in/out for ch. 9-10 only and DB25 only for ch. 1-8. Mercury D Series G810 Rack System II is meant to be used with a patch bay so you can chain things together there, instead of on the back of the rack. The Mercury D Series G810 Rack System II is not a lower quality system, Mercury just took into consideration that some people will not need all of the features and lowered the cost to help provide a quality product with only the features needed.

    "It is without question that Mercury reached our goal of building a more flexible, more innovative, more stable and more reliable way of using and especially powering '500 Modules.' The new Mercury Power Structure is a leap forward from the original '500' power structure."

    David Marquette, Marquette Audio Labs / Mercury Recording Equipment Co.


    The Mercury D Series G8 Sum-It Module is a 8:2, Passive Summing Mixer for your Mercury G810 Rack System. A simple to operate, but flexible and convenient mixer to have on top of your work station or in your rack. Illuminated push button switches allow you to easily choose Left, Right or Center (for Center both are buttons are engaged) on the G8 Sum-It.

    The G8 Sum-It gives you many options that you can quickly and easily do during a recording session. From recording 8 tracks of Drums and summing down to stereo if you only have 2 Inputs to your DAW or Recorder - Or - You can easily sum multiple microphones together for Mono, Dual Mono or Stereo applications. If you have 3 mics on a Guitar Cabinet you can quickly sum them down to 1 channel by engaging 3 switches on the Mercury D Series G8 Sum-It. Note: You also can still use Direct Outs from Channel 1-8 to go to another DAW, Mixer etc...

    The best feature of the Mercury G8 Sum-It is that it is passive.  Designed to use the Mercury M72s, M76m or GPQ15s Studio Microphone Amplifiers (but any Preamp at 34dB fo gain will work) as the Two Buss Amplifiers for the G8 Sum-It.

    You can easily change the tone of recording by changing the Two Buss Amplifiers on your G8 Sum-It.  Mix and Match your Mercury Studio Microphone Amplifiers to get the sound you want for Bass, Guitar, Drums, Keys etc...  Or You can easily send 4 Stereo Stem from your DAW out to your G810 / G8 Sum-It to get warmed up with you Mercury M72s working as your Two Buss Amplifier.

    Easy set up Example: Take the Outputs of Channel 9 and 10 on the G810 Rack System (which is Left and Right out of the G8 Sum-It) and plug into the Inputs of your M72s or M76m.  Set gain to 34dB and you are at unity level for the Mercury D Series G8 Sum-It. Take the Outputs of the Mercury M72s (working as your Two Buss Amps) to your DAW or Recorder.

    The Mercury D Series G8 Sum-It is the first in the G8 Module Product Line. G8 Modules are proprietary 2 slot modules for slots 9 and 10 in your Mercury D Series G810 Rack System I or II. No other ‘500’ rack has the interface capabilities to connect a Mercury G8 Module.   The G8 Sum-It can be installed in both the G810 Rack System I and G810 Rack System II.

  • Additional Information

    Condition Demo Deal
    Channels 10-Channel
    Chassis 19-in. Rackmount
    Module Slot Count 10 Slots
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