QS 350i

QS

SERIES

User Manual

Contents

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Getting The Best From Your QS350i . . . . . . . . . . . . . . . 4

Flying the QS350i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

QS350i Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 8

QS350i Reference Diagram . . . . . . . . . . . . . . . . . . . . . . 9

User Manual QS Series

QS350i

QS 350i

User Manual

4

Getting The Best From Your QS350i

Connections

Suitable Amplification

The QS350i is an 8 ohm enclosure and can be connected in multiple parallel connections to an amplifier channel that can operate at speaker impedances of 4 ohms.

Two Neutrik Speakon model NL-4 connectors are mounted in a removable panel on the rear surface of the box.

The connector input is wired pin 1+ and pin 1-.

Pin 2 is not connected.

Take care when inserting the Speakon connector twisting the connector until it locks into place.

Reverse the procedure to disconnect.

The QS350i is a mid power level high efficiency system, so ultra high power is not necessary to obtain high sound pressure levels. The recommended power range per amplifier channel is 350 - 500 watts RMS into an 8 Ω load or up to

1,000W RMS into a 4 ohm load. An ideal partner to the QS350i are any of the Quest QA range of amplifiers. Setting the QA amplifier’s high pass filter at 35Hz is recommended for full range applications. If you are intending to add sub bass speakers, the high pass filter can be set to 80Hz.

1

10

5

1

2

10

5

1

OFF 35Hz

HIGH PASS -A

80Hz

Reducing low frequency output will make more amplifier power available for clean vocal reproduction for full range sound, set the high pass filter to 35Hz

LINK A

PIN1:

PIN2:

PIN3:

INPUT A

SIGNAL G ND

SIG NAL +

SIGNA L -

LINK B INPU T B

OFF 35Hz

HIGH PASS -A

80Hz

OFF 80Hz

LOW PASS -A

110Hz

STEREO PARALLEL BRIDGE

MODE

1.4V

32dB

GAIN

26dB

MODEL:

OFF

HIGH PASS -B

35Hz 80Hz

OFF

LOW PASS -B

80Hz 110Hz ON

LIMITER

OFF LIFT

GROUND

GROUND

DESIGNED BY QUEST ENGINEERING,AUSTRALIA

OUTPUT A

BRIDGE

OUTPUT B

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

OUTPUT ASSIGNMENT

PIN 1+ :

PIN 1- :

S IGNA L

GROUND

Push To Reset

~ 220

240V 10A 50/60Hz

User Manual QS Series

QS350i

Recommended QS350i Amplifier Configuration

QS SERIES QS 350i

User Manual

Speaker cables

Speaker cable needs to be as heavy gauge as conveniently possible for low-loss results. Light gauge cable (below 1.5mm) will create extra resistance and waste amplifier power. This particularly applies to long speaker runs. The amplifier’s damping factor statistic (“punch” for the non technical) is greatly diminished, so keep your speaker cables short and as heavy gauge as practical.

Speaker Placement as a Single Box or in

Arrays

The QS350i is intended for use as a single speaker system or as part of a multiple speaker setup with or without sub bass reinforcement. It can also be installed in small arrays of up to three boxes per array for very wide coverage applications. When a group of point source 90 degree speaker boxes are placed together, it is possible to have “interference effect” between some of the boxes causing uneven frequency response. This can be particularly noticeable in the mid-high frequency area. If you intend to set up the QS350i as part of a multiple box array, see the section ‘Flying the QS350i’.

When positioning the speaker system on a stage, make sure the HF horn at the top of the speaker box is above the heads of the audience. At full power the output of the QS350i is very high and hearing damage can result from short to medium term exposure.

For best results when the QS350i is used as a front of house speaker, consider angling the box forward slightly to direct the HF horn to cover the audience area.

The HF horn should be aimed away from the ceiling and focused on the intended area of coverage. This will minimize HF reflections, lower the reverberant field in the room and give better intelligibility.

5

Ideal QS350i Flown Configuration

QS Series

QS350i

User Manual

QS SERIES QS 350i

User Manual

QS350i Wave Guide Examples

45

+15˚

-45˚

QS350i FOH Configuration (front)

60˚

QS350i FOH Configuration (side)

-45˚

+15˚

7

QS350i Foldback Configuration (side)

45˚

QS350i Foldback Configuration (front)

45˚

60˚

QS350i Horiztonal Configuration (front)

+15˚

-45˚

QS350i Horizontal Configuration (front)

QS Series

QS350i

User Manual

QS 350i

User Manual

8

QS350i Specifications

110

100

90

80

70

60

50

20 50 100 200

QS350i - Frequency Response - 2.83V/1m

500 1k 2k 5k 10k 20k

Frequency (Hz)

Power Handling

Frequency Response

Sensitivity

Maximum SPL @ 1m

Impedance

Connections and Wiring

Woofer

Tweeter

Directivity

Dimensions

Weight

Technical Parameters

400W RMS

60-19kHz (+/-3dB)

93dB @ 1kHz

127dB

8 ohms

2 x Speakon NL4 - 1+/1- (2+/2- through)

12” High Power Mid-Bass Woofer

1” Neodymium Compression Driver

Asymmetric +15/-45 Vertical | 45/60 Horizontal

610x420x340 mm

19 kg Net

User Manual QS Series

QS350i

QS SERIES QS 350i

User Manual

QS350i Reference Diagram

1 - front mould

7- compression driver

(+7bis - recone kit )

10 - connection plate

9 - X-over

5 - Horn-flares

11 - complete multi-purpose bracket

8 - complete Plate + X-over

No.

1

2

9

10

11

7

7bis

8

3

4

5

6

6bis

2 - back mould

6 - Woofer

(+6bis Recone kit)

3 - Complete grille

4 - Rotating Q

Description

Speaker Front Mould

Speaker Back Mould

Grill (Including Acoustic Foam)

Rotating Q-badge (23mm) with Spring Loaded Pin

Horn Flare (Wave Guide)

12” Woofer

12” Woofer Recone Kit

1” Compression Driver

1” Compression Driver Diaphragm

Complete Connection Plate and Complete X-Over

Complete X-Over

Connection Plate

Complete Multi-Purpose Bracket

9

Spare Part

HFP350i

HBP350i

HG350i

HQB25

HWG350

T12001

RT12001

T1009

RT1009

HCCP350i

HXQS350i

HCP350i

WB350i

QS Series

QS350i

User Manual

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Thank you for choosing Quest. Please take the time to complete your product registration card which is included with the packaging.

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