AUSTRALIAN MONITOR DOUBLE 15 User manual

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THE CONCEPT
The Qmx DOUBLE 15 is the first in a new generation ofAustralian
Monitor high power loudspeakers. Qmx is the culmination of many
years of rcseiuch, development and practical 'hands on' experience
in high power sound reinforcement systems and their applications.
The unique concept of Qmx provides all that is rcquired to achieve
the optimum in dynamically accurate high fidelity performance.
Qmx provides unifom wavefront coupling, enhanced phase
coherence in the cross-over region, constant dircctivity, stable
beamwidth and yet is capable of delivering a maximum on axis peak
SPL of l36dB. A11 achieved without expensive electronic trickery or
special equalizers compensating for speaker inadequacies or bad
cabinet designs .
THE SYSTEM
A full range loudspeaker system, the Qmx DOUBLE 15 features a
two way, long throw, quasi bandpass vented enclosure with physical
alignment of driver acoustic centres fbr accurate
signal syrchronization. Transient response of the
low frequency section is designed to have a
wavefom envelope that is balanced with that of
the high frequency section. Vertical dispersion is
'ymmetrical and unilorm in the cro'sover region.
the mean front-to-back energy ratio is higher over
the entire spectrum than most other systems on the
market today. The Qmx DOUBLE 1-5 is compact
and easily manageable allowing high packing
densities in confined areas.
LOW FREQUENCY SECTION
The Low Frequency section comprises two 380mm cast aluminium
woof'ers providing exceptionally smooth. yet deep and'punchy'
bass. Each drive unit has a 6.,1K9 magnet assembly, and utilises edge-
wound, copper ribbon 62.4mm voice coils resulting in reduced
energy-related thermal compression, high efficiency. and low distor-
tion. The constant directivity characteristic of the hom conpliments
the physical design of the Qmx upper L.F. section, where typically
other systems have a restricted beamwidth in this L.F. region.
HIGH/MID FREQUENCY SECTION
The High/Mid Frequency section incory)orares an extended range,
5Omm comprcssion driver with an edgewound aluminium voice coil,
mounted on a polyimide fbrmer and a 1.5Kg ceramic magnet
assembly. The driver is coupled to a 90 degree horizontal and 40
degree vertical constant directivity hom. The hom is moulded in high
density structural polyurethane to eliminate vibration and resonance.
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NETWORK MANAGER
The heart ofthe Qmx system is the Network Managcr, a sophisticated
proprietary clesign circuit. and the end product of many hundreds of
man hours of intense devclopment and critical listening tests. The
Network Manager's primary task is thrt of a passive filter network:
however, within the Qnrx desigl concept ali is
not as simple as it may appear. Various other
special duties are handled by the Qnx
Network Manager such as: inpedance
corleclion, divcrtransient/antplitude response
control, and hur management. The resulting
smooth liequcncy rcsponse and phase cohcr-
ent acoustical poirt sourcc provide solid
imrging, cladty, detail and defilition rhar has
to be expcricnced to be believed.
CONSTRUCTION
Thc ru-eged cabinet of the Qmx DOUBLE I 5 is constructed in 18mnr
structural grade. hish densit)' piy. Being an cssentially modular
co1]structioi], self bracing is intrinsic to the design. The cabinet is
supplied as standard with four largc stecl bar handles. four 100mll]
diamcter Rcsilcx caslors, and the enclosure is cncased in heavy duty.
dense pile, black carycr. The speaker fronts alc protected b) an easily
renrovable recessed perloratcd steel grille. with acoustic fbam back-
ing: a1l corners are protected by stccl trim caps.
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APPLICATTON
The Qmx DOUBLE 15 is clesigned primarily as the main F.O.H.
sound array for largc or smrll concert tour-it]g syslcms. Hotvever due
to the systems outslanLling dispersion characteristics and stllnning
sonic perfonnance, it is also suitable fin fixed installations in outdoor
arenas. concerl halls. large churches. theatres. nigilt clubs and in
many ether applications. Due to its ciispersio:r and inteliiribility
characteristics the Qnlx is suitable lor use in highll'reverberaut
cnvironments. Designetl to bc stackcd or 11own vertically. the Qm,r
DOUBLL, 15 side by side configuration. increases the horizontal
coverage paltem tincl the on axis SPI- by 4 to 5dB. When additional
bass is lequilcd tbr more dynairic impacl. thc matching SI-/AM sub
n'oofer can be adcied to the systen.
POLAR RESPONSE
Thc polar response charts represent the soundfield in the vcrtical and
horizontal axis. The charls sho\\'attenurtion in dB from a nomralised
OdB on axis rettrencc. Thc mcasurcmcnls were taken in an anechoic
space at a distance of 3 metres $,ith 2.0 volts of octavc band-limired
prnk rr,,i.e .el lu ISO (enlre lrcqucllcics.

Qmx'" utilizes
purpose-built
DOI.JBLE 15
Features
proprietary alignment techniques and
design principles which result in the
following attributes:
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EXCELLENT TRANSIENT
PERFORMANCE
HIGH EFFICIENCY
UNIFORM RADIATION
PATTERN
MAINTAI \S INTELLICIBTLITY
UP TO MAXIMT]M SPI,
O MULT]-ROLE APPLICATIONS
UNIFORM WAVEFRONT
COUPLING
FULL RANGE COMPOSITE
SYSTEM
COMPACT PACKAGE
COST EFFECTIVE
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Australian Monitor
Qmi n de!8ned bl A0iful'xr voniktr in conjlndion snh RLchtrd Pnddtc A..untc\
Auslralian \4onilor PIy l-Id, 29 Hopc Slreet. Lnrington, Sydney NSW 2115 Au\rrilir.
Phone: 61 2 87,19:155 F :61 2 874 9lr)rr
TECHNICAL
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SPECIFICATIONS
Frequcncy Response: 43Hz 1'/kHz +/- 3dB I Crossover: Passive. compensated second ordel
35FIz - 20kHz +/- 6dB I Linkwitz-Riley
Sensitivity: l05dB re I Watt/Mctrc I Construction: Premium Grade, high density 18mrn ply
SPL: l33dB Continuous I Net Weight: 70Kg\ tl54l-bs)
lr6dB Perk I Dimenrion*: 550rrm Wide r.22 r
Power Handling: 600 Watts (Continuors Progrrmmer | 1060mm High (4L75')
1200 \\eI. rPeck - urrclippcJ .igr':,'lr I j-0mm Decp ,22.5 '
Impedance: 4ohm (nominal) | 6x5mm Deep (27") including castors
Enclosure Type: Vented. Quasi Bandpass / double ended I Fl)$are: ,l point Aero type pan ring fittings.
reactive loading I * ith sleel brckrng plares (optional)
LF Driver 2 { 380nm (15') cone type I Connector: lpin XLR (srandard). Speakon (optional)
HI'/MF Driver: Compression type,5umm (l') throir I Accessories: ,1 x l00mm heavy duty ball bearing
Horn Type: Constant directivity I .uston (slardard)
Dispersion: 9ooHorizonlal (60ooptiondl) | I r l lmm recessed steel bar handlcs (standard)
,l0overtical I Weatherproof canvas padded covers(optional)
Plain wood or painted linish (optional)
C&C IPE 2/9]