1 (323) 278-0001 [email protected]

Immersive Audio Achieved


The Casablanca IVA now offers immersive audio. Playback of Dolby Atmos and DTS X material is fully realized with the Casablanca IVA. Since 1996, continuous upgrades have maintained our vision of a reference-worthy multi-channel audio processor with audiophile performance, come-hither cosmetics and world-class usability and maintained essential contemporary features. The 2012 revision to the III HD brought a new, Dave Reich designed power supply with HDMI HDR and lossless audio decoding. Today’s upgrade to the Casablanca IVa brings full 4k HDMI HDR with HDMI 2.0 compatible inputs with HDCP 2.2 and includes full HDR capability using state-of-the-art audio bandwidth to 192 kHz, increases DSP processing power by a factor of 10, adds world-class digital room correction and optimization from Dirac Live operating at a world-leading 96 kHz and our novel Jitter Jail II to fix insidious timing errors especially inherent in HDMI HDR audio signals. Only Theta Digital has offered such quality and long-term value in this ever-changing product category. Operational control is improved in the Casablanca IV. Not only can it be easily controlled by its front panel buttons, or via standard IR remote control, or, for the ultimate in system control, by its powerful RS-232 protocol which interfaces with complete home automation systems from companies such as Crestron, Savant and (soon) Control 4, remote operation is now possible from a new range of devices including iPad, iOS and Android devices.

Contact Theta Digital by phone (323) 278-0001 or email ([email protected])  for pricing.


Digital Input Section (32 kHz, 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz compatible)

Inputs (digital input board) 8: 4 coaxial (RCA), 4 optical (Toslink)
Outputs (digital input board) 2 digital tape out: 1 coaxial (RCA) 1 optical Toslink
Inputs (digital input board) 3: 1 AES / EBU (XLR), USB for Dirac Live® 96 kHz
Outputs (digital input board) 2 Volume Data (RCA)

Analog Input Section

Inputs 6 stereo pair on RCA jacks
Input Level 200 mV RMS minimum, 22 V RMS maximum
Input Impedance 10 kohms
Outputs 2 stereo pair on RCA jacks for analog tape out
Tape Output Impedance 36.5 ohms
A / D Conversion 20-bit Delta-Sigma at 48 kHz; separate delta-sigma modulator and high performance decimating digital filter
Frequency response ±0.2 dB 20 Hz – 20 kHz
THD+Noise 0.0025%
Dynamic Range 104 dB
Signal to Noise Ratio 104 dB
Input volume control Theta proprietary switched resistor network in the analog domain
Automatic DC canceling circuit

Processing (DSP) Section

All DSP processing is 24 bit with 56 bit accumulator. Some processes, such as low pass crossovers, are 48 bit with 56 bit results.

Channels Supported
Left Front, Right Front, Center Front.
Left Surround, Right Surround.
Left Rear Surround, Right Rear Surround.  
Left Front Height, Right Front Height.
Left Rear Height, Right Rear Height.
One Subwoofer Only
12 Discrete  Channels.

Direct, Upmix, Multi Channel Stereo, Stereo, Mono, and Analog Direct.
The Upmix  Mode will offer Dolby Surround for Dolby and PCM signals.
The Upmix Mode will DTS Neural for DTS and PCM signals.
Analog Direct will bypass all PCM processing, NO DIRAC ROOM CORRECTION in ANALOG DIRECT MODE 2 channel playback only.

EQ DIRAC Room Correction

Crossovers Separate crossovers for each of the following: 
Left Front and Right Front share settings.
Center Front has its own.
Surround Left and Surround Right share settings.
Rear Surround Left and, Rear Surround Right share settings.
The four Heights channels share the same crossover setting.
The crossover points are 40Hz to 200Hz in 10Hz steps for all the above channels.  
The crossover slope is 12db only.

Subwoofers  12 or 24 db slope.

LFE Phase adjustment (0, 180 degrees), level adjustment (0dB to -30dB, off)

Delays . There is individual channel delay of 0 to 50 feet for the set up and calibration of a system.   There is a master signal of delay of up to 320 miliseconds to adjust for different video program material.

Control Section

RS232 Complete ability to control and read status of every operational parameter of unit.
IR Receiver 3.5mm stereo phone jack (rear panel), unmodulated.
IR Receiver Front panel IR window for hand-held remote control.
Remote Power 4 rear panel 3.5mm mono phone jacks: +12 VDC triggered (Can be set to Pulse or Continuous DC), pulse time variable from 0 to 255 mSec. Up to 100 mA each. See page 77 of Operator’s Manual for more detail.

Video Section

HDMI Input/Output card 
HDMI Input Four (4)  HDMI 2.0 compatible inputs with HDCP 2.2 and includes full HDR capability
HDMI Output One (1) output HDMI 2.0 compatible inputs with HDCP 2.2 and includes full HDR capability




Power Requirements 117 VAC, 50-60 Hz, 120 watts with all options installed
Dimensions 19″W x 16″D x 7.5″H (483 x 406 x 191 mm)
Weight 43 Lbs (19.5 Kg) Stand alone, 50 Lbs (22.7 Kg) Boxed with accessories Environment Operating Temperature: 32° to 95° F (0° to 35° C)
Storage Temperature: -22° to 167° F (-30° to 75° C)
Relative Humidity: 95% maximum without condensation
Remote Control 1 Pre-programmed and learning hand-held, battery powered control unit uses 2 AA batteries

DAC Cards
Xtreme D-3 Balanced D/A Card (Available in 2, 4, or 6 Channel Configurations)

Miscellaneous D / A Conversion 24-bit, 192K. One Stereo PCM-1792A DAC per channel (6 per board) configured for true differential operation.
Volume Control Theta proprietary switched resistor network in the analog domain.
Digital Filter 8x oversampling Theta proprietary FIR filter running on FPGA . Single-Ended Output None
Sample Rates Supported 32KHz, 44.1 kHz, 48 kHz, 88.1 kHz, 96 kHz, 176.2, 192 kHz.
Balanced Output Specifications Output Impedance 100 Ohms.
Maximum Output Level 20 Vrms balanced. Frequency Response 20 Hz-40 kHz, ± 0.025 dB, Ref. 1KHz.
THD+Noise Less than 0.0006% @ 1KHz, maximum output level.
Dynamic Range 120 dB minimum, 20 KHz bandwidth, Ref. 1KHZ, A-weighted.
Signal to Noise Ratio 120 dB, A-weighted referenced to rated output. Crosstalk -105dB Right – Left, >-120dB Center-Left @ 20KHz.


Premium 3 Balanced D/A Card (available in 6 channel configuration)


Xtreme D-2 Balanced D/A Card

Contact Us

Theta Digital
7133 Telegraph Road
Montebello CA 90640

Phone: +1 (323) 278-0001