RODE Microphones NTK Manuel utilisateur

(EMC, LVD)

NTK

Instruction Manual

www.rodemic.com

- 2 -

Introduction

Thank you for investing in the multi award-winning

NTK valve condenser microphone.

The NTK is the result of an extensive development

program to create a truly superior valve condenser

microphone.

The heart of the NTK is the Australian designed and

manufactured HF-2 capsule. The electronic circuitry

complementing this very sensitive transducer includes

a hand-selected twin-triode 6922 valve and audiophile

grade components and layout.

The result is an ultra-wide dynamic range, very low

noise, and stunning tube warmth that has made the

NTK a favourite in the hearts and studios of tens

of thousands of audio professionals around the world.

The NTK’s rich valve sound is ideal for vocals, acoustic

instruments, drum overheads, guitar amps and pianos.

Please take the time to visit www.rodemic.com and

While there you can view studio tips and techniques, as

well as browse the comprehensive range of accessories

for microphones.

Peter Freedman

Microphones

Sydney, Australia

- 3 -

Speciﬁcations

Acoustic

Principle:

Pressure gradient

Active

Electronics:

Valve/tube impedance

converter with bipolar output

buffer

Directional

Pattern:

Cardioid

(see graph)

Frequency

Range:

20Hz ~ 20,000Hz

(see graph)

Output

Impedence:

200Ω

Sensitivity: -38dB re 1V/Pa @ 1kHz

(25mV/Pa @ 94dB SPL)

±2dB @ 1kHz

Equivalent Noise: 12dBA SPL

(per IEC651)

Maximum

Output:

+29dBu

(@ 1kHz, 1% THD into 1kΩ)

Dynamic Range: >147dB (per IEC651)

Maximum SPL: >158dB

(@ 1kHz, 1% THD into 1kΩ)

Signal/Noise: >82dB SPL

(@ 1kHz, rel 1Pa per IEC651)

Power

Requirement:

Dedicated power supply

(100-120V / 200-240V AC

50/60Hz)

Net Weight: 760g

Dimensions: 208 x 55 x 55mm

- 4 -

Speciﬁcations

Frequency Response

Polar Response

Accessories

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–

• Power supply (NTK-PS)

• NTK cable (NTK-C)

• Power cable (PL100)

• Stand adaptor (M2)

- 5 -

Features

• Large capsule (1”) with gold-plated diaphragm

• Class “A” valve circuitry

• Hand selected and graded 6922 twin-triode valve

• Dedicated power supply

• Ultra low noise

• Wide dynamic range

• High strength heat treated steel mesh head

• High level of RF rejection

• Designed & manufactured in Australia

• Full 10 year guarantee*

DO NOT DISCONNECT THE MICROPHONE

CABLE WHILE THE SYSTEM IS POWERED

AS THIS MAY RESULT IN DAMAGE TO THE

MICROPHONE

NEVER REMOVE THE MAINS EARTH

DOING SO CAN HAVE LETHAL CONSEQUENCES

ACHTUNG: LEBENSGEFAHR

ENTFERNE NIEMALS DEN SCHUTZLEITER

NON SCOLLEATE IL FILO DI TERRA

POTREBBE ESSERE MOLTO PERICOLOSO PER IL RISCHIO DI

SCOSSE ELETTRICHE

RELIEZ IMPERATIVEMENT L’ALIMENTATION A LA PRICE TERRE

SOUS RRISQUE MORTEL S’ÉLECTROCUTION

NUNCA MANIPULE LA TOMA DE TIERRA

ESTA ACCION PUEDE TENER GRAVES CONSECUENCIAS

IMPORTANT NOTICE

*Online product registration required.

- 6 -

• Ensure that your NTK has been set to the correct

voltage, as used in your country. The NTK can be

used with mains suppliy voltages of between either

110-120V 50/60Hz or 220-240V 50/60Hz.

- To select for 110-120V use, set the voltage selector

to 115V.

- To select for 220-240V use, set the voltage

selector to 230V.

• On either voltage selection the mains fuse (inside

the mains socket) is always to be a T500mA slow

blow fuse.

• The back panel of the NTK power supply has a

microphone output socket, a ground (earth) lift, a

microphone input socket, a voltage selector, and a

mains power socket which also incorporates a fuse.

• The front panel of the NTK power supply has

the mains power on/off switch and a blue LED to

indicate power status.

Before using the NTK

Microphone

output

Power switch

Microphone input

Voltage selectorGround lift

Mains socket & fuse

Power LED

- 7 -

• Having ensured that the power supply is set to the

correct voltage you can begin to connect the NTK

to the power supply. Do not connect the power to

the mains before connecting the microphone.

• Connect the male 7-pin plug of the NTK cable to

the 7-pin input socket on the rear of the power

supply.

• Connect the female 7-pin plug of the NTK cable

to the microphone. Ensure that both plugs are

correctly aligned and pushed ﬁrmly into their

respective sockets.

• Now connect an XLR microphone cable to the

output socket on the rear of the power supply,

taking that output to your mixer/pre-ampliﬁer.

• We suggest the use of a high quality cable,

preferably with gold plated contacts. Use as short

a cable as possible, as long cables can adversely

affect sound quality.

• Ensure that the NTK is ﬁxed securely (using the

supplied stand mount, or optional SM2 shock

mount) to a stable microphone stand. The NTK

condenser microphone is a precision instrument

and should be treated with care.

• Now you can connect the power supply to

the mains supply and begin using the NTK

microphone.

Connecting the NTK

- 8 -

• The gold dot on the face of the NTK indicates the

front of the microphone, and the pick-up area of

the cardioid pattern. Please be sure to have the

side with the dot facing the sound source you wish

to record.

• Microphone technique, or how to get the sound

you want, requires experimentation.

We suggest that you start with the channel EQ

set to ‘OFF’ or ‘FLAT’ (no boost or cut). Try to get

the sound you want by placing either reﬂective or

absorbent panels at various angles adjacent to the

source being recorded.

• Changing the acoustic properties of the space

around the microphone is our recommended initial

approach for obtaining best sound quality.

Remember you cannot change a room’s acoustic

properties with EQ.

When the preferred sound has been achieved

(as above) then EQ and effects such as reverb

or indeed any signal processing can be used for

enhancement, but should be used sparingly.

• It is worth mentioning that sometimes ‘cutting’ a

particular frequency (sound) may be preferable

to ‘boosting’ another. Of course ‘boosting’ can

increase noise level and so should be done

minimally.

As with many other aspects of the recording

process, ﬁnding the preferred ‘sound’ is a matter of

experimentation.

Using the NTK

- 9 -

• We strongly recommend the use of a pop shield or

ﬁlter for all vocal recording. These aid in minimising

plosive sounds (hard ‘P’, ‘B’, ‘T’ and ‘K’ sounds)

that produce a sudden jet of air which can cause

the capsule to overload and produce a ‘popping’

sound.

• Any moisture on the microphone capsule can

cause problems for condenser microphones,

however the use of a pop shield or wind shield

(optional accessory WS2) will reduce the risk of this

occurring.

• Placement of the microphone and pop shield

relative to the vocalist may be varied on several

factors including room acoustics, the vocal

performance, and whether the vocalist has a high

or deep voice.

• An ideal reference is to begin with the pop shield

directly in front of the vocalist, and approximately

15cm (6”) away from the microphone. This will assist

in keeping the performer at a constant minimum

distance from the microphone and helps to

maintain reasonable recording levels.

• Experimentation should be made with the angle

from which the microphone is addressed, as

different results can be achieved when the vocalist

is ‘off-axis’ to the microphone (and the gold dot).

• If an earth loop is present (a mains frequency hum)

there is a ground lift switch on the rear panel of

the power supply, which should be raised to the

‘lift’ position. This earth loop can appear when two

devices which are both earthed are connected

together.

- 10 -

• After use the NTK should be removed from its

mount, wiped with a dry, soft cloth and placed in its

protective case.

• Be sure to place the moisture-absorbent crystals

(supplied) at the head of the microphone, so as to

absorb any moisture present.

Eventually this pack of crystals will need to be

dried. This is indicated by the crystals turning pink

in colour.

They can easily be re-used by placing them in an

oven at 100 - 150 degrees celsius for approximately

ten minutes. The crystals will operate effectively

again once they have turned blue.

Storage

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