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Sunfire Theater Grand IV Surround Processor 17" w/ Sonic Holography

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  • $1,999

The Sunfire TGIV (Theater Grand IV) packaging has changed very little from the prior model, the TGIII. It is 17 inches wide, five-and-three-quarters inches high, 16.5 inches deep and weighs 24 pounds. The TGIV retains the charcoal gray anodized faceplate, chassis, and top cover. The faceplate has a horizontal linear grained texture that continues to the top cover for a uniform look. This styling has been with the Sunfire products for a while and still looks relevant today. The radius corners give the TGIV a refined and unique presence that speaks of pride in brand recognition. The front panel controls are identical, sporting the same bright orange buttons. The exception is an elliptical shape to the display recess that frames the familiar blue characters, as opposed to a rectangular one on the TGIII.

Looking at the back panel you’ll find it also remains similar. To connect to various high-definition sources, there are three 100MHz+ HDTV compatible high-bandwidth component video inputs, and two component video outputs. Six audio/video inputs, with composite video, S-video and audio, and three composite video, S-video and audio outputs gives you plenty of connectivity, and a new feature allows the ability for video format conversion that automatically up-converts composite to S-video and S-Video to component video to keep you from having to change inputs on your TV. Eight channels of analog inputs are provided for connecting a DVD-Audio or SACD player. There are six coaxial (S/PDIF) and four optical digital connections with a single coaxial and optical output, providing the ability to send a direct digital signal, whether it is 5.1 or analog, to a CD burner or a PC if you choose. Need more than one subwoofer? The TGIV gives you the ability to run four. Do you like Firewire? The TGIV has an IEEE-1394 port.

Although the TGIV has their proprietary “side axis” channels, which are matrixed from the front left and right channels that work in two-channel as well as surround. I’m not sure how many people will actually use this feature, especially when only a small percentage of users actually take advantage of 7.1. The cost of more speakers, amps and cabling often makes the monetary decision an easy one. Sunfire keeps things simple and cost-effective in comparison to other high-end AV preamps.

Thoughtfully, the Sunfire TGIV has separate high-current trigger and infrared outputs for both zones. Sunfire also includes, much to my delight, balanced outputs for the main 7.1 channels of the processor. This robust interconnect exceeds the performance of RCA interconnects with their inherent noise cancellation. 

Specs and Features:

  • Auto signal-sensing input switching – automatically turns the unit on, selects your source and surround mode
  • 7.1 Channel Dolby Pro Logic IIx, Dolby Digital,
    Dolby Digital EX, DTS, DTS-ES and DTS Neo:6 decoding, plus Side-Axis
    outputs for 9.1 channels playback
  • Bob Carver’s Sonic Holography Imaging in noise-free DSP for the soundstage enhancement of two-channel sources
  • Second zone plays sources independent of the main zone
  • Full-time digital downmix provides accurate
    two-channel output for tape recording, digital outputs, and second zone
    from multichannel digital sources
  • Nine channel (user settable) “PARTY” mode engages all speakers from any two channel source
  • Direct two-channel analog bypass mode
  • Preprogrammed and learning remote control with LCD display
  • Bob Carver’s Dynamic Tuner Noise Reduction for dramatically improved clarity of weak FM stations
  • Simulated surround mode converts stereo inputs into five or seven channels of output
  • FM/AM tuner with Bob Carver’s Dynamic Noise Reduction circuit and 40 presets
  • DSP tone controls
  • Three 100MHz+ HDTV compatible wide-bandwidth component video inputs and two outputs
  • Format conversion between S-VHS, component and composite video
  • Six audio/video inputs, each with audio, S-video and composite video
  • Three audio-only inputs, including Moving Magnet Phono input
  • Eight analog audio inputs for DVD-A, SACD
  • Digital audio (S/PDIF) inputs for six sources: four coax or optical, plus two coax only
  • Coaxial and optical digital (S/PDIF) outputs provide two-channel digital downmix from 5.1 sources
  • Balanced XLR outputs for primary 7.1 channels
  • Four subwoofer outputs
  • Side-axis side speaker outputs for completely enveloping soundstage (total of 9.1 channels!)
  • Comprehensive all-digital bass manager with crossover frequencies of 40 to 160Hz
  • 24-bit A-to-D converter and 24-bit/192kHz Multibit D-to-A converters for the ultimate in sound quality
  • Separate trigger outputs and infrared inputs for both zones
  • FLASH memory upgradable just by playing a CD-ROM
  • IEEE-1394 (Firewire™) port for future expansion
  • 110volts 60hz AC only
  • Built in 2004 : it does NOT have HDMI 
1 unit available. NEW still sealed in factory packaging with Remote, Glass Plinth, Power cord & manual
We ship double-boxed and insured via Fedex Ground.

Original Retail Was $4000.00

Buy it now$1999.00 


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  • Returns

  • We do not offer free auditions. Defective items will be exchanged within 14 days from delivery. After 14 days, please contact the manufacturer. 
  • Defective item returns must be in the manufacturer's original packaging, in like new condition, including all packaging material, shipped double boxed and fully insured 
  • Item is guaranteed to be as described. If a refund is desired, we will refund your full purchase minus a 15% restocking fee.  The item must be as-sold, unopened, and in a re-sellable condition. Return shipping costs to seller will be the buyer's responsibility. Please contact us with any questions in advance.