Trident A-Range 500 Handleiding

Trident Niet gecategoriseerd A-Range 500

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L E G E N D A R Y E Q U A L I Z A T I O N

A-Range® 500 User Manual

Safety - This product is intended for professional use only and it is assumed

that the user is familiar with the 500 Series Modular Rack system. Always

switch o the rack power before inserting or removing this (or any other)

module or damage may occur. Do not expose this product to direct heat,

moisture or mechanical shock.

Warranty - This product is warranted free from defects in material or workmanship,

for a period of one year from date of purchase. During this period, Trident Au-

dio Developments will repair or replace this product by prior arrangement free

of charge, providing the product is determined to be defective and has been re-

turned, freight prepaid, in its original or similarly protective packaging, to a Trident

Audio Developments Service Center. Trident Audio Developments is not obligated

to provide the Purchaser with a substitute unit while repairs are carried out.

Environmental - This product complies with the RoHS directive and contains no

lead or other banned hazardous materials. In accordance with the WEEE directive,

this product must be disposed of responsibly at its end of life, by means of local

authority approved recycling systems.

For further information, or to register your purchase,

visit: www.tridentaudiodevelopments.com

Trident Audio Developments

1845 W 169th Street, Gardena, CA 90247 | tridentaudiodevelopments.com

US Sales & Service

+1 (310) 323-9050 sales@tridentaudiodevelopments.com

UK Service Only

+44 (0) 1392 826 005 ukservice@tridentaudiodevelopments.com

A-Range® is a Registered Trademark of Trident Audio Developments

Introduction

The legendary A-Range® equaliser holds a unique place in audio history, with a

stunningly musical sound that resulted from its all-discrete transistor circuitry and

the use of inductors in the upper and lower mid bands. The A-Range® s a faithful

re-creation of the original four band Trident A-Range® equaliser in a 500 module

format, that will add the unique Trident signature to any programme material.

The mid frequency EQ sections are “peaking”, while the high and low frequency

sections are “shelving”. A distinguishing feature of both the original A-Range® console

and this module, is the use of faders for level adjustment, rather than rotary potentiometers.

These faders feature a useful centre detent at mid travel to denote zero boost or

cut of the selected frequency. The use of faders makes it very easy to see not only

how much equalisation is being applied. Each band is rotary-switch-selectable to

one of four frequencies, while individual push buttons engage the three high pass

and three low pass ﬁlters. An LED peak level indicator is included to warn when

levels get too high. The Line level input and output are balanced for maximum

signal integrity & high output levels with minimum distortion.

The dierence between shelving and peaking equalisers are as follows. A shelving

equaliser boosts or cuts all frequencies equally, above or below a certain frequency,

usually the point where it eectively reaches its “shelf” state. A “high shelf” EQ

boosts or cuts high frequencies and a “low shelf” type boosts or cuts low fre-

quencies. This type of circuit is very popular in hi-ﬁ systems but is also actually

highly musical when applied in a recording environment. In contrast, a peaking

equaliser is one that, as its name implies, has a centre frequency that is boosted

or attenuated more than others. The frequency range over which it reaches its

peak and then falls down is known as the bandwidth (or “Q”). Because this type

of design reaches a peak and then falls away, it is possible with this type of circuit

to “home in” on particular frequencies and make adjustments without aecting

those around them. This can be particularly useful when working with instruments

such as bass guitars and snare drums. By incorporating both shelving and peaking

equalisers into the design of the versatile A-Range®, it is possible to get the best

of both types of design.

Operating the Equaliser

Begin with all boost/cut faders set to their mid way (‘0’) positions. Adjust the low

and high mid frequency controls to their minimum positions (fully anticlockwise).

The high and low pass ﬁlter switches should be in their out positions. Set the fre-

quency select switchescontrolling the high and low shelving sections, to 150Hz and

12kHz respectively. Lastly,press the ‘IN’ switch (the associated green LED will light).

Pushing up any of the four faders beneath its associated frequency select switch,

will result in the chosen frequency being boosted. Moving the faders below cen-

tre will result in the chosen frequency being cut. Operating the frequency select

switch in the high section (8kHz to 15kHz shelving) will introduce a subtle change

of emphasis. Operating the frequency select switch in the upper mid section (3kHz

to 9kHz peaking) will introduce a distinct dierence according to the frequency

selected, since it is now peaking rather than shelving and also due to the charac-

teristics of the inductor-based circuitry. Operating the frequency select switch in

the ‘lower mid’ section, 250Hz to 2kHz peaking, will also introduce a distinct dier-

ence according to the frequency selected, again because of its peaking nature and

the use of inductors in this part of the circuit.

Operating the frequency select switch in the low section, 80Hz to 150Hz shelving,

will introduce an eective change of emphasis to the low frequencies.

Finally, the three shelving ‘low-pass’ and ‘high-pass’ ﬁlter sections are employed to

introduce a roll-o of either high frequencies or low frequencies respectively, ac-

cording to which of the three push buttons are selected in each section. The high-

pass ﬁlters are useful for the minimization of extraneous low frequency ‘rumble’

caused, for example, by someone’s feet moving about near a microphone stand,

nearby trac noise, AC systems, etc. Additionally, a high-pass ﬁlter can be used

eectively during recording to reduce the accumulation of low frequency sounds

that can adversely aect a mix. The three high-pass corner frequencies are 25Hz,

50Hz and 100Hz. The low-pass ﬁlters are used to minimize high frequency noise

that may cause ‘harshness’ in a vocal, or to tame the output of a violin or guitar

ampliﬁer, etc. Low-pass ﬁltering is often employed on kick and snare drums and

bass guitars, as well as a means of reducing ‘hiss’. The three lowpass ﬁlter frequen-

cies on the A-Range® are 9k, 12k and 15k. Filters can also be used in combination

for greater eect.

The amount of boost or cut required for any particular programme material is a

very subjective matter and is usually found by experiment. Use the ‘IN’ switch to

make comparisons between EQ’d and non-EQ’d signals. Keep an eye on the red

“PK” LED: occasional ﬂashes are OK but if it is on all the time, turn down the input level

to the A-Range® module. using whatever modules precede it in the signal chain.

Extended Function

If you have a Radial Workhorse™ or compatible rack, you can send the output of

the A-Range® to the rack’s internal mix buss. To do this, locate jumper J1 on the

main circuit board near the edge connector. Move the jumper onto the two pins

nearest R53.

Technical Speciﬁcation*

Input impedance 10kohm balanced

Common mode rejection 70dB

Equivalent input noise -85dBu (unweighted,

no boost or cut)

Distortion 0.05% (+4dBu output, 1kHz)

Frequency response 20Hz to 20kHz (-1dB)

Boost / Cut range +/-15dB (variable)

Filter Q value 1.3 (1 octave)

Maximum input level +22dBu

Max output before clip +28dBu (10k load)

Nominal output level +4dBu (electronically balanced)

Output impedance 100 ohm

Output noise ﬂoor -85dBu (typical, unweighted)

Peak LED threshold +16dBu

I/O connections XLR: pin 2 +, pin 3 -, pin 1 ground

Current requirement 130mA (maximum) per rail

*In the interests of product development, Trident Audio Developments

may change technical speciﬁcations without notice.

2Trident Audio Developments | A-Range® 500 User Manual 3Trident Audio Developments | A-Range® 500 User Manual

Product specificaties

Merk:	Trident
Categorie:	Niet gecategoriseerd
Model:	A-Range 500

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