TWO Aphex Dominator II - Precision Multiband Peak Limiter

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Vendedor: kitus1983 ✉️ (206) 0%, Ubicación del artículo: Rubi (Barcelona), Cataluña, ES, Realiza envíos a: WORLDWIDE, Número de artículo: 172480532524 TWO Aphex Dominator II - Precision Multiband Peak Limiter.

The Dominator II from Aphex Systems is a stereo multiband peak limiter designed to fit

a wide range of applications. Through the use of multiband techniques along with new

proprietary circuits, the audibility of limiting action has been greatly reduced, especially

when compared to conventional limiters. This means that greater limiting depth is

possible, resulting in higher loudness with maintained audio quality. At virtually any

limiting depth, the Dominator II is free of “hole punching”, “dullness”, and most other

effects normally associated with limiters. As a peak overshoot protection limiter, the

Dominator II is undetectable in line while it absolutely prevents peak levels from

exceeding a user settable output level. In addition, the desired limiting effects of

greater audio density and increased “punch” are readily available with the Dominator II.

 

FEATURES

 

• Peak Ceiling Trimmable in 0.2dB Steps Over a 34dB Range

• 3 Bands of Limiting with Switchable Crossover Frequencies

• Patented Automatic Limit Threshold (ALT) Circuitry

• Freedom from Pumping

• Freedom from Spectral Gain Intermodulation

• Adjustable Density (Relative Crest Height)

• Calibrated Detented Potentiometers

• 104dB Dynamic Range

• LF and HF EQ Provides Shaping Equalization Below Peak Ceiling

• Relay Bypass, Remote Controllable

• Servo-Balanced Transformerless Inputs and Outputs

 

Why is the Dominator So

Special?

A very significant problem with wideband processing

is “spectral gain intermodulation” which occurs when

one part of the spectrum controls the level of another

part. A typical situation is a vocalist being “sucked

down” every time the kick drum hits.

Since most energy is contained in the lower

frequencies, they tend to control the level of the entire

spectrum. When the lower frequencies are above the

limit threshold the higher frequencies are attenuated

thus causing the output to sound dull.

Multiband processing solves these problems by

splitting the audio into two or more frequency bands

and processing each band separately. However, more

bands often result in many more parameters to control

including a method of summing the bands together

again. While giving the user flexibility, it also requires

different settings for almost every different source.

The Dominator ll uses program dependent, intelligent

circuits to reduce the number of controls. The user,

therefore, has flexibility to shape the sound while

quickly and easily achieving the goal of consistent,

effective limiting.

 

The Secret Ingredient: ALT

 

A multiband processor splits the audio into separate

bands, limits each band individually and then sums the

bands together again. Even though each band’s peak

output is predictable, summing the bands together

produces an unpredictable peak output.

One conventional approach to making the summed

output predictable is to use a wideband limiter after the

summing. This, however, introduces all the drawbacks

of wideband limiting discussed above.

Another approach is to use a clipper on the summed

output. This causes too much clipping distortion if the

summed output is too high. In order to avoid this

distortion the limiters’ thresholds are set very far below

the clipper threshold. The drawback is a loss of

loudness and, due to the lower thresholds, much

greater amount of processing.

The Dominator ll uses a patented method to produce

a predictable peak output while maintaining maximum

loudness without audible distortion- the Automatic Limit

Threshold (ALT). The outputs of the three bands are

summed and sent to the ALT detector circuit. If the sum

exceeds a reference value, the ALT reduces the

thresholds of the individual limiters. When the summed

output falls below the reference value the limit

thresholds return to their original setting.

The ALT circuit has a self-adjusting finite attack time.

The amount of time it takes to lower the thresholds of

the limiters is the length of time the limiters’ overshoot

may be in the clipper. The reference value of the ALT in

relation to the clipper determines the depth of clipping.

Both parameters are set by the Density control. When

the Density control is set higher, the ALT reference gets

closer to clipping, and the attack time is slower,

producing more clipping. The opposite occurs when

Density is set lower. The “0 RCH” position for the

Density control emulates the standard parameters of

the original Studio Dominator Model 700, and is

recommended for general use.

 

Precision MultiBand Peak Limiter

 

INPUT GAIN - adjusts

input level ±15dB.

Center detent is unity

gain.

PROCESS OFF/ON -

switches the audio

through the unit or

through bypass relays.

LF EQ - adjust input

level to the low

frequency band ±5dB.

Center detent is flat

response below limiting.

XOVER 1 - switches

the crossover point

between low and mid

bands from 100Hz to

RELEASE - adjusts

release time of the

limiters between

150mSec (fully

clockwise) and 7Sec

(fully counter-clockwise).

HF EQ - adjusts input

level to the high

frequency band ±5dB.

Center detent is flat

STEREO

forces th

band to

limiting

the othe

band in

has a gr

limiting.

XOVER

crossov

mid and

1.7kHz

 

It should be noted that there is only one ALT circuit

controlling both channels equally. This provides global

stereo balance and imaging by assuring that both

channels always limit at the same threshold. This

does cause an interaction if the Dominator ll is used

as two independent channels. Therefore, we do not

recommend such a practice.

 

Applications

 

Sound Contracting — protection of amplifiers and

speakers from overload; increased loudness;

maximized use of available power.

Recording — preventing sudden peak overload of

mixer or recorder; tightening tracks; special eff e c t s ,

e t c .

Mixing — used as a program limiter, the Dominator ll

will keep a track “rock steady” for “layering” into or on

top of a mix.

Digital Sampling — obtaining good full scale samples

free from peak overload, i.e. no more missed samples.

Digital Recording — insuring clean recording by

stopping clipping of peaks and overshoots. Maximizes

bit usage for less distortion.

Satellite Uplink — Modulation control to prevent

splattering on high frequency audio, gives reduced

distortion, better signal-to-noise.

Broadcasting — AM and FM modulation control for

increased loudness; cleaner sound; use in production

for greater consistency of tapes, punchier voice-overs.

Location Film Shoots — anti-crash for dialog and

sound effects recording.

Post Production — Soundtrack peak control;

managing difficult dialog; controlling transient sound

effects.

Optical Recording and Transfer — prevents “valve

clash”, gives higher average level with low distortion

and better signal-to-noise performance.

Analog Disk Mastering — peak control for high

allowable average cutting levels; less limiter

degradation to the program; brighter, punchier sound.

C/D Mastering — peak and density control for more

accurate digitizing, cleaner sound requiring less error

correction on playback; no limiter induced sound

degradation.

STL & Phone Line Driver — maximize signal-tonoise

without overload distortion.

Video and Audio Tape Duplication — “Hotter”

transfers without saturation.

 

POWER - switches

AC mains on and off.

“Off” position engages

bypass relays.

RCH DENSITY - adjusts

the Relative Crest Height

(RCH) of the output.

The higher the RCH

(clockwise) the louder the

output. The lower the

RCH (counter-clockwise)

the lower the average

level in the output.

FINE - adjusts the

PEAK CEILING by

±1dB in 0.2dB steps.

RANGE - when switched

to the “.10” position it adds

a 10dB boost in the input

and a 10dB cut in the

output. The PEAK CEILING

is therefore 10dB lower

than the settings shown

on COARSE and FINE

controls.

COARSE - switches

the PEAK CEILING

in 2dB steps from +2

to +24dB(pk).

LIMITING (meter) -

displays the limiting

(from gain reduction

and clipping) in the

channel with the

greatest amount of

limiting. · The equipment has been tested and works perfectly, although some may have some chafing in their physical appearance due to use. · Any questions you might have we will gladly respond to. · El equipo ha sido comprobado y funciona a la perfección, aunque alguno puede tener alguna rozadura en su aspecto físico debido al uso.

· Cualquier duda o consulta que quiera hacernos estaremos encantados en atenderle.

  • Condition: Usado
  • Condition: Some units have surface wear but they all work properly.
  • Marca: Aphex
  • MPN: AX720-2482 // AX720-5243
  • País/Región de fabricación: Estados Unidos

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