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DBMax is a Level Maximizer and Audio Enhancement processor for use in digital transmission, linking, webcast and radio STL applications.
High resolution and high sample rate processing prevents unwanted distortion and listening fatigue from being generated, artifacts often associated with comparable processors.
The 5-band section in DBMax can be combined with Automatic Gain Control, Dynamic and Static Stereo Enhancement, Dynamic and Static Eq and other tools for maximizing audio impact and creating a signature sound. Balanced and unbalanced AES/EBU I/O is standard, and outputs are always active. Sample rate conversion can be invoked when using digital inputs. Analog I/O is standard and outputs are always active.
The 24 bit converters are scaled in the analog domain, with scaling under preset control, to minimize noise and maximize headroom under all operating conditions. DBMax can be remotely controlled using GPI or RS485 serial inputs.
MAIN FEATURES:
Maximum Level
Maintain maximum level and simultaneously eliminate overshoots.
• Maximum efficiency: 5-band compression.
• Limiting: Sample accurate, distortion reduced Limiter.
• Multi Slope: Add gain at mid-levels without squashing the transients.
Optimum Quality
The DBMAX uses precision calculations at a full processing rate to keep aliasing distortion low and audio bandwidth high.
Audio quality has been our primary concern when designing the DBMax - hence you can even cascade several units without any sonic penalties.
• Bandwidth: Processing at up to 48kHz sample rate for 24kHz audio.
• Resolution: Processing of all 24bits of an AES/EBU Digital signal.
• A/D-D/A converters: 24bit resolution with analog pre-scaling.
Output Formats
AES/EBU, S/PDIF and Analog outputs are all active simultaneously.
Digital outputs may be dithered to resolutions between 8 and 24bits.
Analog and Digital outputs may have emphasis applied individually.
Gain Transfer
Example of gain transfer and parameters using DBMax.
Presets
The DBMax comes loaded with 60 presets for a variety of different applications.
DBMax Internal Structure
Four selectable Insert algorithms surround the multi-band structure.
The digital output fader may be remotely set via voltage control.
COMPRESSOR
The heart of the DBMAX is the most powerful dynamics tool you?ve ever heard: A five-band Compressor with adjustable slopes and cross-over frequencies. An advanced Look-ahead Delay can be used to reduce dynamic distortion and transient overshoots.
ou can easily change the DBMAX multi-band structure from one to five bands.
Take control over individual band parameters or adjust them in groups.
Find a Preset you like and adjust the More / Less master compression control
INSERT BLOCKS
Insert blocks give you the ability to use plug-in types of processing tools before the 5-band Compressor/Limiter/Expander.
Three simultaneous pre-dynamics inserts are available and you decide the order.
Insert examples: Parametric EQ, Normalizer, Dynamic EQ/De-esser, AGC (Automatic Gain Control), MS Encode/Decode and Stereo Enhance.
EQUALIZER
Properly used multi-band compression is often a more desirable form of EQ. With the DBMAX you can do both.
Use the multi-band Parametric EQ to adjust the spectral content of your programme and preserve or enhance its transparency and energy.
BRICKWALL LIMITER
Both the five-band and wide-band Limiters can be used simultaneously.
The five-band Limiter uses look-ahead delay, and each band may be engaged individually.
A Brickwalll Limiter at Insert 4 is a sample accurate system including distortion cancelling look-ahead delay. If desired Soft Clipping may also be added.
50ls, 75ls or J17 emphasis can be used as a reference for final limiting. Afterwards the emphasis may even be removed individually on the analog and/or digital outputs. By removing emphasis after the limiting process, transmission lines using data compression perform better.
WIZARD
Based upon know-how from transmission engineers around the world, the Wizard will produce optimum settings for you. Answer a few simple questions, play your typical program material, and let the Wizard function take care of the rest. No matter if you're processing for high quality digital transmission or internet audio, you're set in a matter of minutes. From this point, you can start building your own unique station identity by taking advantage of more than 200 uncensored parameters encompassed within the DBMax
TOOLS
For alignment and signal check, a range of precision tools are included: ? Peak Hold Meter with 0.1dB resolution.
? Surround Meter showing L, C, R, S levels.
? Phase Correlation Meter with time-base.
? Internal Headroom Metering.
? Oscillator for calibration 30Hz-15kHz at levels from -30dBfs to 0dBfs.
? Digital Status Tool lets you monitor input status and decide how status bits are handled through the machine.
TECHNICAL SPECIFICATIONS:
Digital Inputs and Outputs
Connectors XLR (AES/EBU) RCA Phono (SPDIF)
Formats AES/EBU (24 bit), SPDIF (20 bit), EIAJ CP-340, IEC 958,
Output Dither HPF TPDF dither 8-24 bit
Word Clock Input BNC, 75 Ohm, 0.6 to 10 Vpp
Sample Rates 32 kHz, 44.1 kHz, 48 kHz
Processing Delay 0.5 ms @ 48 kHz
Frequency Response DIO DC to 23.9 kHz ± 0.01dB @ 48kHz
Sample Rate Conversion
Type Asynchronous
Dynamic Range 120 dB
THD+N -106 dB 44.1 to 48 kHz @ 1 kHz, -2 dBFS
Input Rate Range 31 kHz to 49 kHz
Analog Inputs
Connectors XLR balanced (pin 2 hot)
Impedance 20 kOhm (balanced)
Max. Input Level +27 dBu (balanced)
Min Input Level (for 0dBFS) -4 dBu
A to D Conversion 24 bit (1 bit, 128 times oversampling)
A to D Delay 0.8 ms @ 48 kHz
Dynamic Range >103 dB (unweighted), >106 dB (A)
THD -95 dB (0.018%) @ 1 kHz -6 dBFS (FS@ +18 dBu)
Frequency Response 10 Hz to 20 kHz: +0/-0.2dB
Crosstalk <-80 dB, 10 Hz to 20 kHz typical -100 dB @ 1 kHz
Analog Outputs
Connectors XLR balanced (pin 2 hot)
By-pass Through relay
Impedance 40 Ohm (balanced)
Max. Output Level +26 dBu (balanced)
Full Scale Output Range -4 dBu to +26 dBu (balanced)
D to A Conversion 24 bit (1 bit, 128 times oversampling)
D to A Delay 0.57 ms @ 48 kHz
Dynamic Range >100 dB (unweighted), >104 dB (A)
THD -86 dB (0.005%) @ 1kHz, -6 dBFS (FS @ +18 dBu)
Frequency Response 10 Hz to 20 kHz: +0/-0.5 dB
Crosstalk <-60 dB, 10 Hz to 20 kHz typical 90 dB @ 1kHz
EMC
Complies with EN 55103-1, EN 55103-2 FCC part 15, Class B CISPR 22, Class B
Safety
Certified to IEC 65, EN 60065, UL 1419 and CSA E65
Environment
Operation Temperature 32° F to 122° F (0° C to 50° C)
Storage Temperature -22° F to 167° F (-30° C to 70° C)
Humidity Max. 90% non-condensing
PCMCIA Interface
Connector PC Card, 68 pin type 1 cards
Standards PCMCIA 2.0, JEIDA 4.0
Card Format Supports up to 2 MB SRAM
Control Interface
RS485/RS422 5 Pin DIN
MIDI In/Out/Through: 5 Pin DIN
GPI, Pedal, Fader 1/4 inch phone jack
General
Finish Anodized aluminum face and top plate Plated and painted steel chassis
LCD 56 x 128 dot graphic LCD-display
Dimensions 19" x 1.75" x 8.2" (483 x 44 x 208 mm)
Weight 5.2 lb. (2.35 kg)
Mains Voltage 100 to 240 VAC, 50 to 60 Hz (auto-select)
Power Consumption <20 W
Backup Battery Life >10 years
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