Short Description:

The Next Generation of conversion is here with the HEDD Quantum! Featuring improvements to the original HEDD 192 converstion quality as well as new connection options, the HEDD Quantum takes it's quality and features to the next level while still offering the unique harmonics controls that made the original unit so incredible!

Manufacturer Description:

The new features in the HEDD Quantum:

• Quantum clocking is the same sub pico second jitter clocking that is used in the Avocet IIA DAC
• In HEDD Quantum, the sub ps jitter clocking is applied to both the AD and the DA
• The result is very good imaging, a very open 3d sound, and very detailed transit response, it is very accurate
• Optical in and out have been added, toslink
• HEDD Quantum as a master clock
• There are 6 new WC outputs that allow HEDD Quantum to be used as a master clock at the same time that the AD and DA are being used
• In addition to the new AD, DA, Clocking, I/O and WC outputs.  HEDD  Quantum still has the same great DSP emulation of Triode, Pentode tubes and Tape emulation
• Operational modes allow the DA and the AD to be used at the same time, at different sample rates.  In the DIGI setting the unit will run digital in from one of three sources and output on all three digital outputs and the analog output at the same time.
• In the ANA mode the input is analog and it outputs on all three digital outputs and the analog output at the same time.
• Dither, which is analog generated, is selectable for 16 or 20 bit
• The AD, DA and ASRC chips are the high end AKM 32 bit parts, coupled with proprietary analog filtering and clocking
• A word on upgrades of HEDD-192, the DA will upgrade, the AD will but will not be tested until Late November, the clocking will not.

HEDD, short for Harmonically Enhanced Digital Device, is a technological breakthrough in signal processing. It is engineered to provide musically pleasing sound with the capability of generating tube/analog sounds in the digital domain. HEDD gives any user who works with digital the ability to sound less digital and more analog.
Features include:

•     High-quality 24-bit A/D and D/A Convertors
•     24-bit Processing
•     Adjustable Triode, Pentode and Tape sounds
•     Digital I/O, AES and S/PDIF
•     External WC Sync Input and Output
•     22 Element VU Metering
•     Analog Tape Compression

The front panel controls allow the user to select input source, sample rate, and continuously variable triode and pentode sounds. The HEDD can operate as an effects device or as a separate A/D and D/A convertor with the harmonic generation process applied to either the A/D or the D/A convertor.
The signal processor performs 24 Bit processing on a digital or analog source.

HEDD has transformerless balanced analog inputs and outputs, transformer isolated digital inputs and outputs, and uses separate power transformers and supplies for the analog and digital sections. The HEDD-192 will operate at sample rates from 44.1K to 192K.

Applications include: CD preparation, work station input and output, DAT machine A/D and D/A convertor replacement and effects generation (warming or changing sounds in the digital domain). HEDD can be used in tracking, mixing, and mastering.

Specifications:

Analog Output: Transformer-less balanced floating stereo output with XLR connectors. Digital zero is +16dBm. This allows 12 db of headroom above a +4dBm 0 VU. Gain adjust trims are on the back panel

Analog Input: Transformer-less balanced floating stereo with XLR connectors. Digital zero is +16dBm. This allows 12 db of headroom above a +4dBm 0 VU. Gain adjust trims are on the back panel

Word Clock Input: BNC connector takes a TTL level signal at the sample rate to sync the A\D to the external sample rate. HEDD will sync from 20 kHz to 192K kHz. The input impedance is 75 ohms.

Word Clock Output: BNC connector this is a TTL level square wave that can be used to provide sync to other equipment. The WC output will be the selected sample rate or the rate of the WC input.

Internal Sample Rate: 44.1kHz TO 96kHz determined by front panel switch.

S/PDIF Input: Unbalanced digital input 75 ohms RCA connector

S/PDIF Output: Unbalanced digital output 75 ohms RCA connector

AES Input: Balanced digital input 110 ohms XLR connector

AES Output: Balanced digital output 110 ohms XLR connector

Power: 25 watts at 115 or 230 volts, 50 or 60 Hz. Fuse size is MDL .3A for 115 volts; MDL .25A for 230 volts

Pilot Lamp: # 7335

Shipping Weight: 15 lbs (6.7kg)

Depth Behind Panel: 10 inches (25.4cm) plus user input/output connectors

The Convertors: HEDD uses high Quality 24 Bit A/D and D/A Convertors made by crystal semiconductor with an upgrade path to 192K sample rate converters