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A S P E C T S E R I E S E N G I N E E R I N G I N F O R M A T I O N
The Aspect series is a range of high performance modular loudspeaker enclosures designed for use across a wide spectrum of sound reinforcement activities, easily scaleable to specific acoustical and venue requirements ranging from large scale indoor or outdoor concerts to corporate events, theatre shows and nightclub applications.
The aim of any sound reinforcement system is to distribute sound evenly, with consistent frequency response and in a predictable way, across all seats of an auditorium or listening area. An optimum method of attaining this goal is through the correct application of point source arrays to create a segment of a spherical wavefront. Not only does this approach provide an exceptionally well defined and coherent acoustic source, but it also allows for considerable flexibility when assembling arrays in both horizontal and vertical dimensions.
guarantees uniformity of phase of the wavefront at the horn mouth. The Polyhorn™ design effectively locates the acoustic centre well behind the motor system, forming a virtual point source whose radius coincides with the array curvature without requiring an excessively deep enclosure.
The TA-880H is a trapezoidal mid-high enclosure designed for ground stacked touring and fixed installation applications, matched to the complementary TA-880L low frequency enclosure. It houses high frequency, high-mid frequency and low-mid frequency elements arranged in a vertical orientation, and covering the frequency range from 100Hz to 20kHz.
In practice, the dispersion characteristics of a typical sound system are less than ideal because of the tendency for conventional high frequency exponential horns to ‘beam’ with increasing frequency. When arraying such horns, interference between adjacent sources is inevitable due to the variable curvature of the wavefront caused by the horn's geometry, and this results in undesirable comb filtering effects.
The top section of the enclosure is dedicated to handling the high frequency band above 5kHz, being reproduced by two custom designed drivers loaded by a high frequency Polyhorn™ device. The HF driver combines highly innovative patented (and patent applied for) design features to ensure exceptional high frequency performance and long term reliability.
High-mid frequencies from 450Hz to 5kHz are handled by a custom designed 10” drive unit on a further Polyhorn™ device optimised for highmid frequencies. Two 10” low-mid frequency drivers loaded with TurboMid™ devices cover the remaining frequency range from 450Hz down to 100Hz.
Turbosound engineers, through intensive research and the subsequent implementation of innovative and patented Polyhorn™ designs, have identified and overcome these deficiencies and implemented solutions in the Turbosound
Aspect series. Fundamental to the Polyhorn™ designs—and applied in both high-mid and high frequency bands—is the principle of dividing an exponential horn flare into a multiplicity of tapered waveguides. A further requirement is that all path lengths from the diaphragm surface to horn mouth are identical, and consequently
The entire mid-high section is symmetrically shaped and consequently can be removed from the cabinet and rotated through 90°. This allows the enclosure to be used horizontally while maintaining a 25°h x 15°v dispersion pattern, or alternatively achieving a tighter array angle of
15° when using the boxes vertically in a long throw application.
A key feature of the Polyhorn™ designs is the very sharp cut-off at the edges of the coverage d a t a s h e e t
TA-880H
FEATURES
Ultra low distortion
Very high output
Trapezoidal enclosure
Seamless arrayability
Removable rigging system
APPLICATIONS
Stadia and arenas
Ground stacked touring
Regional concert touring
Theatre and Corporate
Dance clubs
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TA-880H
A S P E C T S E R I E S E N G I N E E R I N G I N F O R M A T I O N page 2 pattern, which all but eliminates the comb filtering effects commonly experienced between adjacent sources when arraying conventional horn designs. This makes it possible to acheive seamless arrayability in a very intuitive and predictable fashion.
All drive units employ high stability, radial neodymium magnet structures in order to provide very high motor strength—and hence fast transient response—as well as exceptional thermal performance. This also results in a useful reduction in weight which aids transportation and handling.
The TA-880H cabinet is constructed from 15mm (5/8”) birch plywood and is trapezoidally shaped with side angles optimised at 12.5° to ensure that adjacent boxes are currently positioned relative to each other with the optimumhorizontal array angle. A recessed panel on the rear panel carrying two linked Speakon NL8MP’s is further set in to ensure that the cable connectors do not protrude beyond the rear of the box profile where space is limited. A kelping strap attachment point and M10 rigging point are provided on a further recessed panel on the rear, situated just below the centre of gravity, for adjusting the vertical angle.
The cabinet is equipped with four recessed handles—two on each side—placed to enable an easy two-man lift, and a removable wheel board clips on to the front of the cabinet for transportation.
The TA-880H is highly recommended for installing in venues such as theatres, concert halls and entertainment venues. The cost-effective flying system consists of removable steel swords which pass through slots in the top and bottom of the cabinet.
KEY FEATURES
• Controlled dispersion pattern of 25° x 15° generates highly focused coverage pattern in both horizontal and vertical planes with exceptional projection capabilities
• HF transducer and 10” high-mid driver employ a high stability, high temperature radial neodymium magnet structure which offers much higher efficiency, as well as reduced weight
• Patented HF Polyhorn™ designs generates equal level across a uniformly curved wavefront identical to the array profile
• Directivity over 1kHz exhibits very sharp cut-off at the edges of the pattern, dramatically reducing out-of-band signal
• Unique 10" high-mid frequency driver is fabricated from a single-piece spun aluminium bowl, serving as a high strength frame, heatsink, rear compression chamber and high pass filter
• Low-mid section employs rear-facing drivers with loading functions. Magnet cover / heatsink assemblies act as phase plugs as well as providing additional cooling
• Revolutionary composite cone materials are used in all cone transducers, giving high strength to weight ratio
• Flying system consists of removable swords which enable quick and simple rigging for permanent installations
KEY SYSTEM BENEFITS
• Minimal destructive interference between adjacent enclosures, effectively giving seamless arrayability in both horizontal and vertical planes. All audience seats get essentially the same frequency response
• Intuitive 'point and shoot' characteristics make it very easy to adapt flown or ground stacked clusters to widely variable venue and audience requirements
• Very high power capability combined with high efficiency means that peak sound pressure levels of up to 146dB are easily achievable from one cabinet
• Greatly improved thermal performance from neodymium magnet structures reduces power compression to negligible levels and delivers more amplifier power into acoustic watts
• Ability to tailor the PA coverage according to extremely varied venue requirements; can achieve optimum coverage even in irregularly shaped rooms
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A S P E C T S E R I E S E N G I N E E R I N G I N F O R M A T I O N d a t a s h e e t
TA-880H
d a t a s h e e t
TA-880H
A S P E C T S E R I E S E N G I N E E R I N G I N F O R M A T I O N
DIMENSIONS (H
NET WEIGHT
COMPONENTS
FREQUENCY RESPONSE
DISPERSION
POWER HANDLING
SENSITIVITY
3
X
W
X
D)
(1W@IM)
MAXIMUM SPL
CROSSOVER BANDS
NOMINAL IMPEDANCE
CONSTRUCTION
GRILLE
CONNECTORS
OPTIONS
SPARES AND
ACCESSORIES
1
2
1025mm x 477mm x 463mm (40.3” x 18.8" x 18.3")
59kg (130 lbs)
2 x custom 10” (254mm) LMF drivers, 1 x custom 10” (254mm) HMF driver on a midrange
Polyhorn™, 2 x custom HF drivers on a high frequency Polyhorn™
95Hz - 20kHz ±4dB
25°H x 15°V
LMF: 500 watts r.m.s., 1000 watts program
HMF: 200 watts r.m.s., 400 watts program
HF: 100 watts r.m.s., 200 watts program
LMF: 108dB; HMF: 114dB; HF: 111dB
140dB continuous 4 , 146dB peak 5
LMF: 101Hz–405Hz, HMF: 405Hz–4kHz, HF: 5k99Hz–20kHz
LMF: 8 ohms HMF: 16 ohms HF: 12 ohms
15mm (5/8”) birch plywood throughout; rebated, screwed and glued. Finished in black semimatt textured paint (optional TurboBlue™). Four recessed carrying handles
Cloth/expanded metal
2 x Neutrik Speakon NL8 wired: pin1+: linked internally; pin1-: linked internally; pin 2+: LMF positive, pin 2-: LMF negative, pin 3+: HMF positive, pin 3- HMF negative, pin 4+: HF positive and pin 4-: HF negative
Wheel dolly
MG-880
LS-1022
RC-1022
LS-1021
RC-1021
CD-112
RD-112
W-3
Replacement cloth/expanded metal grille
10” (254mm) LMF loudspeaker
Recone kit for LS-1022
10” (254mm) HMF loudspeaker
Recone kit for LS-1021
HF compression driver
Replacement diaphragm for CD-112
Heavy duty wheel
Notes
1 Measured on axis
2 Average over stated bandwidth
3 Average over stated bandwidth
4 Unweighted diode-clipped pink noise. Measured in a half space environment.
5 Verified by subjective listening tests of familiar program material, before the onset of perceived signal degradation.
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A S P E C T S E R I E S E N G I N E E R I N G I N F O R M A T I O N d a t a s h e e t
TA-880H
130
120
110
100
Fundamental
10% Power
Sensitivity
1W/1M
Ref.
90
1.0%
80
2nd Harmonic
10% Power
3rd Harmonic
10% Power
70 0.2%
0.1%
60
20 Hz 50
130
100 200 500 1 kHz
Frequency
2
120
Fundamental
10% Power
5 10 20
Ref.
110
Sensitivity
1W/1M
100
90
1.0%
80
70
2nd Harmonic
10% Power
3rd Harmonic
10% Power
60
20 Hz 50
130
100 200 500 1 kHz
Frequency
2
120
Fundamental
10% Power
110
5 10 20
0.2%
0.1%
Ref.
100 Sensitivity
1W/1M
90
1.0%
80
70
2nd Harmonic
10% Power
3rd Harmonic
10% Power
0.2%
0.1%
60
20 Hz 50 100 200 500 1 kHz
Frequency
2 5 10 20
Impedance A constant current circuit was used to measure the impedance. Frequency response The frequency response shown was obtained by feeding a swept sine wave through the system in a half space environment. The position of the microphone was vertically on-axis at a distance of 2 metres, then scaled to represent 1 metre. 2nd & 3rd Harmonic Distortion
Distortion measurements were obtained using an Audio Precision harmonic distortion analysis system and comply with
AES recommendations for enclosure measurement (AES paper ANSI S4-26-1984). Data Conversion All graphs were digitally generated using the APEX custom software system, designed to translate data derived from Audio Precision ‘System
One’ test equipment into AutoCAD™. This program enables graphical information to be plotted to a high degree of accuracy.
HIGH FREQUENCY
RESPONSE
HIGH-MID FREQUENCY
RESPONSE
LOW-MID FREQUENCY
RESPONSE
NOTES ON
MEASUREMENT
CONDITIONS
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TA-880H
HIGH FREQUENCY
IMPEDANCE
A S P E C T S E R I E S E N G I N E E R I N G I N F O R M A T I O N
300
200
100
HIGH MID
IMPEDANCE
LOW MID IMPEDANCE
300
200
100
16
10
8
4
2
1
20 Hz 50 100 200 500
Frequency
1 kHz 2 5 10 20
300
200
100
4
2
1
16
10
8
20 Hz 50 100 200 500
Frequency
1 kHz 2 5 10 20 page 6
NOTES ON
MEASUREMENT
CONDITIONS
4
2
1
16
10
8
20 Hz 50 100 200 500
Frequency
1 kHz 2 5 10 20
Impedance A common method, constant current circuit was use to measure the impedance. Frequency Response The frequency response shown was obtained by feeding a swept sine wave through the system in a half-space environment.
The position of the microphone was vertically on-axis, horizontally in-line with the MF/HF section at a distance of 3 metres, then scaled to represent 1 metre. 2nd & 3rd Harmonic Distortion Distortion measurements were obtained using an
Audio Precision harmonic distortion analysis system and comply with AES recommendations for enclosure measurement
(AES Paper reference: ANSI S4-26-1984). Data Conversion All graphs were digitally generated using the APEX custom software system, designed to translate data derived from Brüel & Kjæl and Audio Precision “System One” test equipment into AutoCAD™. This program enables graphical information to be plotted to an accuracy of more than four decimal places.
A S P E C T S E R I E S E N G I N E E R I N G I N F O R M A T I O N
330° 30° 330° 30°
300°
60°
300°
60°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
120° 120°
240°
315 Hz
400 Hz
500 Hz
210°
330°
300°
30°
150°
60°
240°
630 Hz
800 Hz
1 kHz
210°
330°
300°
30°
150°
60° d a t a s h e e t
TA-880H
HORIZONTAL THIRD
OCTAVE POLARS
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
120° 120°
240°
1.25 kHz
1.6 kHz
2 kHz
210°
330°
300°
30°
150°
60°
240°
2.5 kHz
3.15 kHz
4 kHz
210°
330°
300°
30°
150°
60°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
120° 120°
240°
5 kHz
6.3 kHz
8 kHz
210°
150°
240°
10 kHz
12.5 kHz
16 kHz
210°
150° page 7
page 8 d a t a s h e e t
TA-880H
A S P E C T S E R I E S E N G I N E E R I N G I N F O R M A T I O N
VERTICAL THIRD
OCTAVE POLARS
330° 30° 330° 30°
60°
300° 300°
60°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
120° 120°
240°
315 Hz
400 Hz
500 Hz
210°
330°
300°
30°
150°
60°
240°
630 Hz
800 Hz
1 kHz
210°
330°
300°
30°
150°
60°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
120° 120°
240°
1.25 kHz
1.6 kHz
2 kHz
210°
330°
300°
30°
150°
60°
240°
2.5 kHz
3.15 kHz
4 kHz
210°
330°
300°
30°
150°
60°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
10
270°
0 10 20 30 40
40 30 20 10 0
10
90°
120° 120°
240°
5 kHz
6.3 kHz
8 kHz
210°
150°
240°
10 kHz
12.5 kHz
16 kHz
210°
150°
d a t a s h e e t
TA-880H
A S P E C T S E R I E S E N G I N E E R I N G I N F O R M A T I O N
ARCHITECTURAL
& ENGINEER’S
SPECIFICATIONS
The loudspeaker system shall be of the trapezoidal tri-amped type comprising: two high frequency drivers loaded with patented PolyHorn ™ , one 10” (254mm) high-mid frequency driver loaded with a patented PolyHorn ™ , and two 10” (254mm) low-mid frequency drivers loaded with TurboBass™ devices. Performance specifications of a typical production unit shall meet or exceed the following:- Frequency response, measured with a swept sine wave input shall be flat within ±4dB from 95Hz to 20kHz. Dispersion shall average 25°H x 15°V. Nominal impedance shall be LMF: 8 ohms, HMF: 16 ohms, HF: 12 ohms. Power handling shall be LMF:
500 watts r.m.s., 1000 watts program; HMF: 200 watts r.m.s., 400 watts program; HF: 100 watts r.m.s., 200 watts program. Sensitivity measured with 1 watt input at 1 metre distance on axis, mean averaged over stated bandwidth shall be LMF: 108dB, HMF: 114dB, HF: 111dB.
Maximum SPL (peak), measured with music program shall be 146dB. The loudspeaker system shall be the Turbosound Aspect TA-880H. No other system shall be acceptable unless the above combined performance specifications are equalled or exceeded. Flying and installation hardware shall be available comprising a range of load-certified components.
DIMENSIONS
12.5°
463mm
[18.3"]
TOP
477mm
[18.8"]
1025mm
[40.4"]
FRONT SIDE REAR
BOTTOM
TA-880H Version 1.2 12/07
© Turbosound 2005
Turbosound Ltd Star Road Partridge Green West Sussex RH13 8RY England tel: +44 (0) 1403 711447 fax: +44 (0) 1403 710155 • www.turbosound.com
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