Klark Teknik SQ1D Product Information Document

Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

High-performance frequency-

selective compression and gating
with comprehensive control options

Intelligent Threshold Shift (iTS)

gate hysteresis to avoid re-triggering
by low frequency signals

Flexible channel linking allows

multiple combinations of side chain
summing to preserve stereo images

Solo bus allows monitoring of the

side chain control signals without
a ecting channel outputs

RMS and “Vintage” peak-sensing

compressor modes

Soft or hard knee

compressor response

Side chain band-pass  lter allows

frequency-selective compression or
gating for creative and
corrective control

External side chain input on

balanced ¼ " TRS connector for
each channel

Electronically balanced inputs and

outputs on Neutrik* XLR connectors

Rugged 3U rackmount chassis for

durability in portable applications

A veritable tool box of dynamics

processing, SQ1D provides 8 channels

of either compression or gating in a

compact 3U high rack unit. This tightly

integrated form factor allows the

channels to be used together with

ease, and includes highly  exible

options for channel linking and

side chain  ltering and monitoring.

SQ1D features multiple compression

modes with combinations of RMS

and Peak sensing and Hard and Soft Knee characteristics, ideal for both

corrective and creative dynamics processing. In conjunction with the fully-

featured noise gate and side chain options, one SQ1D can replace multiple

other dynamics processors with considerable savings in space, weight

and cost, with the con dence of knowing that whatever the application,

SQ1D is more than capable of providing the required dynamic control of

signal levels.

Auto-ranging universal switch-mode

power supply

3-Year Warranty Program*

Designed and engineered

in England

*All third-pa rty tradema rks are the prop erty of their re spective owne rs.
Their use n either constitu tes a claim of the trad emark nor a liation
of the trade mark owners with M USIC Group. Produc t names
are mention ed solely as a ref erence for compati bility, e ects
and/or compo nents. Warrant y details can be f ound at music-grou p.com.

Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

Intelligent Threshold Shift (iTS)

iTs operates in conjunction with the Gate Hold control to reduce false triggering of noise gates.
When signals (especially low frequency ones) are very close to the gate threshold, a gate can
repeatedly open and close on the programme material. iTS ensures that the gate remains open
by automatically adjusting the gate threshold downwards the moment the signal goes over the
threshold setting. When the signal eventually falls below the (new) temporarily adjusted threshold,
the iTS function resets, ready for the next gate opening. This hysteresis action results in more
decisive operation of the noise gates, and attack envelopes also start instantly and consistently,
even on signals that are only slightly over threshold.

Flexible Channel Linking

Adjacent channels can be linked in any combination for stereo or multichannel operation.
When any number of adjacent channels are linked, the linked channels all adopt the operating mode
(compressor or noise gate) of the left-hand channel of the linked group. This channel’s settings now
control all the members of that group, with only the make-up gain and Side chain  lter frequency
controls independent for optimising the action of the compressor or gate for each channel.

Independent Side Chain Monitoring

SQ1D overcomes a common issue with many outboard dynamics processors, where the side
chain listen function is routed to the main output when engaged, which prevents mix engineers
utilising this essential function during a live performance. SQ1D features an additive console-style
Solo Bus which allows monitoring of the incoming signals at source and the  ne-tuning of the side
chain  lters. Dedicated input and output XLR connectors allow this bus to be cascaded between
multiple units and connected to a spare input channel or auxiliary return on the mixing console,
for easy and convenient monitoring by the mix engineer. A Solo In Place button is included which
will route the side chain signals directly to the audio outputs, a useful feature during the set-up
for a show.

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Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

Multiple Compression Modes

SQ1D features a “Vintage” switch allowing the selection of the default RMS sensing compression
mode, or when engaged, an emulation of many older compressor designs with exponential attack
and release envelopes. When used in conjunction with the “Hard Knee” switch, SQ1D provides several
di erent forms of compression to suit a wide range of programme material. By default, SQ1D o ers
a Soft Knee response, however when the “Hard Knee” switch is activated, a Hard Knee response is
provided instead.

With both mode switches inactive the compressor behaves in the default RMS and Soft Knee modes.
This gives the slowest (and most subtle) feel to the compressor envelopes. The soft knee curve
combines with the adaptive RMS attack and release times to produce gentle envelope responses that
are ideal for compressing sung vocals, but which can still be aggressive enough to limit transients
when needed. The Soft Knee curve also reduces the adaptive nature of the RMS detection slightly,
providing a little more manual control of the envelope timings than is the case below.

When the Hard Knee response is used with RMS mode, the compressor operates in a more
clinical way with a more de ned transition between under threshold and over threshold - this is better suited to limiting style compression.
A small amount of the soft knee curve is still retained keeping the sound reasonably natural but with no modi cation of the compressor envelope.
This means that attacks are more aggressive, but it also allows the adaptive nature of the RMS detection to operate to its fullest extent. This mode
is good for natural sounding limiting of speech.

With the “Vintage” switch active and the default Soft Knee response selected, the compressor employs a dual time constant, linear attack pro le.
This produces extremely subtle attack and release curves during the onset of compression that are largely independent of the envelope
control settings. As the compressor is driven harder (i.e. signals further over threshold) the soft knee e ect reduces, gradually returning manual
control of the attack and release times to optimise capture of larger transients. Like the RMS modes, this compressor mode is very adaptive making
set up of the envelope controls relatively easy. The peak sensing, however, increases harmonic overtones, which add a “Vintage” brightness and
sparkle to the programme, producing extremely transparent and lively sounding compression of acoustic instruments.

When both the “Vintage” and “Hard Knee” switches are selected, the compressor operates with more precise envelope control and a de ned
transition between under- and over-threshold. This produces aggressive compression that gives fast control of extremely dynamic material. It can
also be used to add colour to low frequency signals making it ideal for controlling instruments such as bass guitar. With the highest ratio setting,
this mode allows the compressor to e ectively be used as a limiter.

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Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

Frequency-Selective Compression and Gating

Each channel side chain is equipped with a selectable bandpass  lter with wide and
narrow responses. This powerful feature greatly extends the capabilities of the multiple compression
and gating modes. Frequency-selective compression is a very e ective and creative alternative to
equalisation, with the wide bandpass  lter response being ideal to enhance the essential character
of an instrument, allowing it to stand out in a mix without the use of harsh- or unnatural-sounding
boosted EQ responses. The SQ1D can also be used as a frequency-selective De-esser by selecting
the narrow bandpass  lter response to reduce sibilance or other undesirable artefacts from vocals,
or to remove speci c resonances from instruments or programme material. When the SQ1D is
operating as a noise gate, the side chain  lter can be used to select the key frequency component
in programme material that can be used to trigger the operation of the gate, especially useful with
drums kits and percussion instruments.

The  exibility of the side chains is enhanced by the inclusion of a dedicated side chain input for each
channel on a balanced ¼ " TRS connector.

Built for the Road

Featuring a rugged steel 3U rackmount enclosure, the SQ1D is designed for the rigours of live
concert touring. Premium Neutrik XLR connectors are used to ensure reliable audio connections,
night after night.

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Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

Auto-Ranging Universal Switch-Mode Power Supply

SQ1D features a universal power supply, which is auto-voltage sensing for use on a worldwide basis.

You Are Covered

We always strive to provide the best possible Customer Experience. Our products are made in our
own MUSIC Group factory using state-of-the-art automation, enhanced production work ows and
quality assurance labs with the most sophisticated test equipment available in the world. As a result,
we have one of the lowest product failure rates in the industry, and we con dently back it up with a
generous 3-Year Warranty programme.

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Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

Dimensions

435 [17.1]

6.5 [0.26]

TOP

483 [19.0]

CL

FRONT

203 [8.0]

17.0 [0.67]

132 [5.2]

227 [8.9]

SIDE

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Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

Technical Speci cations

Technical Speci cation

Inputs

Input impedance 10 kΩ
Maximum input level +22 dBu
CMRR -80 dB at 1kHz (typical)
Connectors 3-pin female XLR

Outputs

Output impedance <60 Ω
Min load 2 kΩ
Maximum output level +22 dBu @ 1 kHz
Connectors 3-pin male XLR

External Key Input

Input impedance 10 kΩ

Maximum input level +22 dBu

CMRR -60 dB at 1kHz (typical)

Connector ¼ " TRS

Solo Bus Input

Input impedance 10 kΩ

Maximum input level +22 dBu

CMRR -60 dB at 1kHz (typical)

Performance

Frequency response ±0.5 dB (Input to Output), 20 Hz to 20 kHz

Dynamic range >117 dB (22 Hz to 22 kHz unweighted)

Noise floor <-95 dBu (22 Hz to 22 kHz unweighted)

Compressor

Threshold -50 dB to +25 dBu

Ratio ∞ to 1:1, with scale markings 5:1 and 2:1

Attack 100 μs to 20 ms

Release 50 ms to 2.5 s

Make-up gain 0 dB to +30 dB

Gate

Threshold -50 dB to +25 dBu

Range -∞ to 0dB

Attack 10 μs t o 10 ms

Release 2 ms to 2 s

Hold 2 ms to 2 s

Connector 3-pin female XLR

Solo Bus Output

Output impedance <60 Ω

Min load 2 kΩ

Maximum output level +22 dBu @ 1 kHz

Connectors 3-pin male XLR

Sidechain Bandpass  lter

Frequency range 40 Hz -16 kHz

Ter mi nat io ns

Audio 3-pin XLR and 1/4" TRS jack

Power 3-pin IEC

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Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

Power Requirements

Volt age 100 to 240 VAC ±10%

Consumption <35W

Dimensions

Width 483 mm (19.0")

Depth 227 mm (8.9")

Height 133 mm (5.2")

Weight

Net 4.7 kg (10.3 lbs)

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Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

Architecture & Engineering Speci cations

The dynamics processor shall provide eight complete channels of either compression or gating, with push button selection and LED status
indication of operational mode on an individual channel basis.

The dynamics processor compressor section on each channel shall provide for adjustment of threshold, make-up gain, attack and release times
and compression ratio. There shall be push button selection of RMS or peak-sensing responses and push button selection of Soft or Hard knee
mode on each channel.

The dynamics processor gate section on each channel shall provide for adjustment of threshold, attack, hold and release times and gate range.

The dynamics processor threshold, attack and release controls shall be operable by the same rotary control knobs in compression and
gating modes. Control of ratio and range shall be performed using the same rotary control knob. There shall be individual rotary control knobs
for make-up gain and gate hold.

The dynamics processor shall have a six-segment input level meter and a ten-segment attenuation depth meter (to show the gain reduction
being applied in both compression and gating modes) for each channel.

The dynamics processor shall have a sidechain band-pass  lter for each channel with a rotary control knob for frequency control, which
shall be enabled by a dedicated push button switch. Each band-pass  lter shall have wide and narrow bandwidth settings, selectable by a
push button switch. There shall be provision for an external sidechain input for each channel, individually selectable by the external key push
button switch with LED status indication.

The dynamics processor shall have a bypass switch on each channel to set the signal path to unity gain with LED status indication.

The dynamics processor shall have a solo switch for each channel with LED status indication that sends the sidechain signal to the solo bus
output connection.

The dynamics processor shall have a solo bus input connection to allow multiple dynamics processors of the same type to be chained together
to form a common solo bus output.

The dynamics processor shall provide the solo bus input and output connections on balanced XLR connectors.

The dynamics processor shall have a side chain solo in place switch with LED status indication to change the function of each solo switch,
when selected the sidechain signals for each channel shall be sent to the respective channel output connectors instead of the solo bus output
connection.

The dynamics processor shall have the ability to link the operation of any number of adjacent channels, which shall all be summed into the
sidechain of the left-hand linked channel which shall control the gain of each of the linked channels. The selection of either compression or
gating for the left-hand linked channel shall override the push button settings for all channels linked to it.

The dynamics processor shall have an LED for power on indication.

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Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

The dynamics processor shall have input and output XLR connectors and a ¼ " TRS jack socket for the external side chain input for each channel.
All audio connections shall be electronically balanced.

The dynamics processor shall include an auto-ranging universal switch-mode power supply for use on a worldwide basis.

The dynamics processor shall be housed in a standard 3U 19" rackmount chassis, and shall be 483 mm wide x 227 mm deep x 133 mm high
(19.0" x 8.9" x 5.2"), with nominal weight 4.7 kg (10.3 lbs). The dynamics processor shall be installed in a rack frame or road case capable of safely
supporting its weight. Input, output, and power connections shall be made at the rear panel of the dynamics processor. Installers shall allow
adequate space at the rear for connection and disconnection of input, output, and power connections. The power requirements shall be 100 to
240 VAC, 50 to 60 Hz.

The dynamics processor shall be the KLARK TEKNIK model SQ1D and no other alternative shall be acceptable.

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Product Information Document

Compressors/Limiters

SQ1D

8 Channel Dual-Mode Compressor/Gate with
iTS Hysteresis and Flexible Channel Linking

For service, support or more information contact the KLARK TEKNIK location nearest you:

or service, support or more information contact the KLARK TEKNIK location nearest you

Europe

urope

MUSIC Group Services U

MUSIC Group Services UK

Tel: [phone]

Tel: [phone]
Email: [e-mail]

mail: [e-mail]

MUSIC Group a ccepts no liabilit y for any loss which m ay be su ered by any p erson who relie s either wholly o r in part upon any de scription, pho tograph, or stat ement contained h erein.

USIC Group acc epts no liability for any loss which may be su ered by any person wh o relies either wh olly or in part up on any descript ion, photograp h, or statement con tained herein .

Tech nic al sp eci cations, app earances and othe r information are s ubject to change w ithout notice. Al l trademarks ar e the propert y of their respec tive owners. MI DAS, KLARK TEKN IK,

echnical speci ca tions, appeara nces and other info rmation are subje ct to change witho ut notice. All trad emarks are the pr operty of their resp ective owner s. MIDAS, KLARK T EKNIK,

LAB.GRUPPE N, LAKE, TANNOY, TURBOSOU ND, TC ELECTRONIC , TC-HELICON, BEHRIN GER, BUGERA , DDA and TC APPLIED TECHNOLO GIES are tradem arks or registered trademarks of

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MUSIC Group IP Lt d. © MUSIC Group IP Ltd. 2015 All right s reserved.

USIC Group IP Ltd . © MUSIC Group IP Ltd. 2015 All rights reser ved.

USA/Canada

USA/Canada
MUSIC Group Services NV Inc

MUSIC Group Services NV Inc.

Tel: [phone]

Tel: +1 702
Email: [e-mail]

Email: CARE@music-group.

Japan

apa

MUSIC Group Services JP K.K

MUSIC Group Services JP K.K.

Tel.: [phone]

Tel.: [phone]
Email: [e-mail]

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