Superlux PRA538 User Manual

J U S T P L A Y I T

Specifications

Type

Heavy duty go oseneck

Polar pattern

Unidi rectional (Supe r Cardio id), rot ational ly symmetrical about
microphone ax is, uniform wit h freque ncy. (Fi gure 1).

Frequency response

100 to 15,000 Hz (Figure 2)

Sensitivity

(at 1,00 0 Hz Open Circuit Volta ge)

-58dB V/Pa (1.26 mV/Pa) 1Pa=94 dB SPL. 3dB

Rated impedance

500Ω

Mini mum load impe dance

500Ω

250 Hz

500 Hz

1000 H z

TYP ICAL SU PERCA RDIOID POLAR P ATTER N (Fi gure 1)

dB

10

0

-10

-20

RELA TIVE RE SPONS E IN dB

20 50 100 200 500 1000 2000 5000 100 00 20 000 Hz

Fre q ue ncy Respons e

FRE QUENC Y IN Hz

TYP ICAL FR EQUEN CY RESP ONSE (F igure 2)

2000 H z

4000 H z

8000 H z

PRA538

Install Gooseneck

Dynamic Microphone

User Guide

G O A N G - F A N N C O . , L T D .

20 07, SUPE RLUX I
LB10005 3801EN ( Rev. 1)

nc.

Connector

strip ed wire connection,color coded .

Finish

metal structure,matt e black paintin g.

Environmental conditions

The PRA538 operate s between -10 ℃ to +50℃(14℉ to 122℉ ) with
relative hum idity between 0 to 95%.

Dimensions

PR A53 8S  32. 0mm (1. 26 in. ) X 4 00. 0mm(1 5.7 5in .)

PR A53 8M  32. 0mm (1. 26 in. ) X 5 80. 0mm(2 2.8 3in .)F igure 3

Net weight

150g (5.29oz.)

－ 1

Fe a tures

! Tailored frequ ency res ponse to in cre ase the intang ibility of audio

reinforcement o r recordin gs.

! Super cardi oids increase gain before feed back.

! Matte black coating with sturdy s tructure.

! 2 lengths to choise: 12" (PRA538S) or 1 9" (PRA53 8M).

! Additional S suff ix indicates a muting on /off switch i s integra ted.

(PRA5 38SS, PRA 538MS).

! PRA538MS/P incorporating a PTT (pus h-to-ta lk) funct ion that can

remote control ot her devic es. A GT2C is i ncluded .

! Tinned strip ed wi res for insta llation conv enience . Bal anced signal,

pleas e refer to wiring diagram for connection indications.

－ 2

Di m en si ons (f igure 3)

The PRA538 series gooseneck microphones are super cardioid, dynamic
type capsule integrated with internal shock mount to reduce handling noise.
Tailored frequency response is very suitable for human voices applications
such as speech, announcement in public transportation systems and
gathering venues.

－ 3

Low handling noise, bend and set, minimized bounce back gooseneck tube
has very good service time.

Easy to install with 3 screws to most surfaces. Please refer to the wiring
information below.

Wiring diagram

Mi c.
Un it

Mi c.
Un it

Mi c.
Un it

PR A5 38S/P RA538M

SW.

PR A5 38SS/ PRA538M S

PTT S W.

Wh ite

Gr een

Re d

Bl ack

PR A5 38MS/ P

Re d

Bl ack

Sh iel d

Re d

Bl ack

Sh iel d

Ho t

Co ld

Ho t

Co ld

Ho t
Co ld

Sh iel d

Supplied accessories

Pop screen ----- ------- ------- ------- ------- ---- --------- ---- S19

Knowing your microphone

Superlux provides variety selection of microphones for professionals and
amatures. To know your microphone is the first step to successful result.

Type of transducer

Dynamics

Durable and simple structure, operates in all kinds of environments. A good
dynamic microphone is capable to operate at very high sound pressure level
without distortion. Due to structure limit, dynamics cannot be built as small
as condenser, but dynamics doesn require power to operate.

About Frequency Response

Flat

Suitable for w orking at cont rolled environ me nt , or for acoustic
measurements. A lt hough people pe rsuit flatne ss , but for no ne­professionals, it is a challenge to makes it works as expectation.

Popular curve response

Based on years of practical experience of pro users. There are curves to be
build for various applications, so that it is very simple to use the
microphone for the purpose. Limiting bandwidth, and emphasing are typical
skill.

Variable response

Incorporating switchable filters to elliminates interference, such as sub­sonic filter to cut air-conditioner and floor vibrations. And allows full flat
when used in controlled environment.

Directivity

Using dynamic gooseneck microphone

Super Cardioid dynamic microphone features very high sensitivity at ­43dBV/Pa for high intelligible speech application. Reduced off-axis
sensitivity to keep lower background noise and maximized on-axis
sensitivity for highest gain before feedback in live sound system.

User shall keep 15 cm to 40 cm from microphone, and maintain average
speech level. Up close will result excessive bass due to proximity effect
which interfere intelligibility. Maintain their speaking in front of the
microphone for high gain before feedback.

Quality conference microphone incorporating built-in limiter to prevent
distortion due to exciting user or close up speaker.

Choices of gooseneck for various demands. For aesthetic, single or double
bend goosenecks are better choice over fully bend design. Low bending
noise is another important feature of good gooseneck microphone. User
shall not bend the gooseneck to hard or rush which may generate excessive
noise which disturbs the audience.

In most cases, each attendee has his own microphone or share a
microphone every 2 attendee. Although there are numbers of microphones
in one space which is not a good criterion for feedback problem, system
operator shall keep as less turn-on microphone as possible for best result.
Auto-mixer is a good choice for multiple microphones installation which
limit the number of turn-on microphone at the one time. Advanced auto
mixer features dynamic threshold and auto gain reduction according to the
number of turn-on microphones to keep the same system gain.

Wind screen is vital for windy environment such as outdoor or close to air­conditioning fan.

Keep capsule and wind screen clean for good audio performance.

Maintainence

Dynamic microphone shall be kept in low humidity environment for best
sound performance. Store the condenser microphones in airconditioned
room or dehumidifier to keep away form moisture. Clean air is another
important factor. Keep away from smoking environment to avoid tar
residuals.

S19

Wind s creen

Super Cardioid

Narrower than cardioid pattern. Suitable for multiple microphone setup.
Least sensitive angle pointing toward side to rear where most stage monitors
are located. Same proximity effect as cardioid microphone.

－ 5－ 4 － 6