Martin Audio MA2.8s handleiding

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Handleiding

Martin Audio – MA2.8s Amplifier

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m ains d istrib utio n syste m b ased on th e cu rre nt d raw a t full p ow er w o uld result in an over sp ecified system . N o mu sic

p ro gram m e ma teria l req uires the fu ll stea dy state con tin uo us po we r o f an am plifier, this o pe ra tin g co n ditio n is o n ly

valid fo r am p lifier be nch testin g.

S ec on d, th e ma xim um expe cte d ave ra ge cu rren t u nd er wo rst-case p ro gra m ma te ria l, wh ich is 1/3 o f fu ll po w er

a ccordin g to th e FT C -sta n da rd . A t th is le ve l the mu sic w ill b e in a state o f co n stan t clip a nd is the re fore the h ig h est

p ow er le ve l tha t ca n b e o btaine d w ith ou t co m plete ly o blite ra tin g th e p ro g ra m ma teria l.

L as t, the "n orma l o pe ra tin g p ow er", as d e fine d b y EN 60 06 5, IE C 6 5/AN SI/UL 6 5 00 a s a m ea surem en t leve l fo r

a pp ro va l a nd te stin g to the se stan da rds. Th e n orm al o pe ratin g p ow er is m e asured usin g p in k n oise , w ith a n ave ra ge

o utpu t p ow er eq ua l to 1/8 o f fu ll po w er. Th e o ne -eigh th po we r is th e m aximu m le vel m u sic ca n b e re-playe d witho ut

con tinu o us a m plifie r clip ping ; this corre sp o nd s to he ad roo m o f on ly 9d Bs, w hich is ve ry low fo r n orma l p ro gra m

m ateria l.

6.7.1 C alcu la tio n

T p11-he c urren t d ra w ca n be ca lcu la te d b y divid in g the m a in s in p ut p o we r by th e m ains vo ltag e .

W e re co m me nd yo u to de sig n th e p ow er distrib utio n for a t lea st th e curre n t at 1 /8 po w er, an d 1 /3 po we r for h e avy-

d uty de m an ds su ch a s con cert to u ring an d in d ustrial m usic etc.

T p11-he h ea t p ow e r ca n be ca lcu la te d a s fo llo ws:

If a p11-he a droo m fig ure o f a t le ast 5 dB (1 /3 o f full p ow er) is u se d with a 4 o hm s loa d o n ea ch ou tp u t of th e a mp lifie r.Th e

1 /3 p ow e r pe r cha nn e l is th en ; 1 50 0 / 3 = 5 0 0 wa tts, an d the to ta l o utpu t p ow er = 2 x 5 00 = 10 00 wa tts.

T p11-he p ow e r co n su mp tio n according to th e ch art a bo ve is th en 1 4 40 wa tts.

T p11-he h ea t p ow e r prod u ce d is the diffe re nce b etwe e n th e p ow er co nsum p tion an d ou tpu t p ow er;

1 44 0 - 1 00 0 = 4 40 w a tts total fo r th e a mp lifie r.

M A2 .8 s H EA T P OW ER

1 /3 P OW E R 1 /8 P OW E R 1 /3 P OW E R 1 /8 P OW E R 1 /3 P OW E R 1 /8 P OW E R

WA TT S K ca l/h ou r BT U/h ou r

8 Oh m 3 27 25 5 2 80 22 0 1 1 20 8 70

4 Oh m 4 40 31 0 3 80 27 0 1 5 00 1 0 60

2 Oh m 5 87 42 0 5 00 36 0 2 0 00 1 4 30

1 /3 P ow e r le vel = A verag e p ow er with mu sic a s pro gram me so urce. T he am plifier d riven to clip leve l

1 /8 P ow e r le vel = N o rm al op erating p o we r with mu sic a s p ro gra mm e so u rce, 9d B he a droo m

POWER 1/3 Power 1/8 Power Idle

[W] note 1 note 2

MA2.8s 8 ohms 2x 1100 1060 530 115

4 ohms 2x 1500 1440 685 115

2 ohms 2x 1700 720 845 115

note 1 Average power with music as program source. The amplifier driven to clip level.

note 2 Normal music power with 9dB headroom, IEC standard power rating.

MAINS INPUT POWER MAX OUTPUT POWER

CONTENTS

GUIDES

Bekijk gratis de handleiding van Martin Audio MA2.8s, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.