Lowell 8A50 User Manual
Lowell Manufacturing Company • 100 Integram Drive • Pacific, Missouri 63069 U.S.A.
Call 800.325.9660, 636.257.3400 • Fax 636.257.6606 • Click www.lowellmfg.com
Lowell makes every effort to provide accurate information and reserves the right to change specifications and/or improve manufacturing methods.
Download and print this spec from www.lowellmfg.com to insure that you have the most current information
2d-107
pg 1 of 4
Printed in U.S.A. © 07-15-05
8A50
50-Watt 8" Coaxial Driver, 20 oz. LF Magnet
Quality Features
Premium 50W coaxial 8-inch driver exhibits greater power
handling, lower distortion, and smoother more musical
sound for high quality commercial sound installations.
Available with factory-wired premium or high perform-
ance 32W, 16W or 8W transformer.
Compatible with a large selection of acoustic extra-
depth backboxes and attractive architectural grilles (see
page 4).
Also available premounted in Lowell's
iMount Series
TM
high performance speaker systems for suspended
installation and in Lowell's
LT Series lay-in tile speaker
assemblies for 1' x 2' or 2' x 2' ceilings (see page 4).
Also available as a UL Listed 1480 General Signaling
assembly (Model WB8-8A50-T870 - see page 4).
Description
Coaxial 50W driver Model 8A50 is the flagship of Lowell's "ASeries" of loudspeakers. The A-Series represents a deliberate
move forward in quality performance over standard commercial
coaxial drivers. It is engineered to meet the demand for very
high quality music and paging reproduction in large venues.
Model 8A50 will provide excellent sound quality in up-scale
restaurants, lounges, hotel lobbies, department stores, and boutiques where a positive consumer listening experience is key to
customer satisfaction.
The 8A50 exhibits greater power handling, lower distortion,
and smoother more musical sound than most commercial
coaxial drivers. It features a large, 20oz magnet coupled
with a 1.4-inch copper voice coil driving a polyproylene cone
with half-roll rubber surround for long cone travel and good
edge damping. The post-mounted tweeter is a 1-inch balanced drive dome protected by Ferrofluid and a first order
high pass filter. Frequency response is 40Hz-20kHz+
6dB
with a crossover at 4 kHz. Additionally, the loudspeaker's capacity to deliver a wide angle of sound distribution (110 degrees)
over a large area with uniform response and voice clarity
ensures complete coverage with minimum units.
The loudspeaker frame is stamped 20-gauge steel with a
black enamel finish and zinc plated backplate. Models with
factory wired transformer will include a bracket mounted to
the top of the magnet for secure support (see driver/transformer assemblies on page 2).
Model 8A50 meets or exceeds all applicable EIA standards.
Lowell also manufactures a complete selection of architectural ceiling grilles,
acoustic, protective, and special application backboxes and baffles to facilitate
speaker installation wherever audio communications are desired.
8A50 Factory-Wired Loudspeaker / Transformer Assemblies
Assembly Mounted Assembly Assembly Xfmr Xfmr Xfmr Xfmr Xfmr
Model Xfmr Depth* Weight Power Rating Primary (Pri) Taps (Pri) Response Insertion Loss
8A50-TS3270 TLS3270 7.8" 8.2 lb. 32W 70V 8, 16, 32W 20Hz - 20kHz +1dB 0.6dB
8A50-TS1670 TLS1670 7.1" 5.9 lb. 16W 70V 4, 8, 16W 20Hz - 20kHz +1dB 0.6dB
8A50-TM3270 TLM3270A 7.1" 6.7 lb. 32W 70V 8, 16, 32W 50Hz - 15kHz +1dB 0.6dB
8A50-TM1670 TLM1670A 6.25" 5.5 lb. 16W 70V 4, 8, 16W 50Hz - 15kHz +1dB 0.6dB
8A50-T870 TLM870 6.25" 4.4 lb. 8W 70V 1, 2, 4, 8W 50Hz - 15kHz +1dB 0.8dB
*Minimum depth required for the speaker transformer assembly to be rear mounted into an enclosure. Note: Transformers are factory mounted to the backplate using a specially designed bracket.
8A50
50-Watt 8" Coaxial Driver, 20 oz. LF Magnet
Lowell Manufacturing Company • 100 Integram Drive • Pacific, Missouri 63069 U.S.A.
Call 800.325.9660, 636.257.3400 • Fax 636.257.6606 • Click www.lowellmfg.com
Lowell makes every effort to provide accurate information and reserves the right to change specifications and/or improve manufacturing methods.
Download and print this spec from www.lowellmfg.com to insure that you have the most current information
2d-107
pg 2 of 4
AUDIO
12”/10”
Speakers &
Accessories
8”
Speakers &
Accessories
6”
Speakers &
Accessories
4”
Speakers &
Accessories
Horn
Speakers &
Accessories
Masking
Speakers &
Generators
Control
Accessories
& Electronics
PERFORMANCE
Power Handling 50 watts RMS (nominal) measured per EIA Standard RS-426A (70W in a 1/2 cu.ft. backbox)
Sensitivity 95dB SPL (peak), 90dB SPL (avg) measured 2.83V @ 1m
Impedance 8 ohms (nominal), 8 ohms @180Hz (minimum)
Frequency Response 40Hz-20kHz (nominal), 40Hz-20kHz (+
6dB)
Crossover Frequency 4000Hz, 1st order high-pass filter
Dispersion Angle 110° @ 2000Hz octave (-6dB)
PHYSICAL - WOOFER
Cone Material Polypropylene with rubber half-roll (up) surround
Magnet Weight, Material 20oz. (567g), strontium ferrite ceramic
Voice Coil Diameter, Material 1.4 inch (36mm), copper wire over aluminum former
Terminals Quick disconnect type - spade lugs
PHYSICAL - TWEETER
Diameter 2.05 inch (52mm) housing with 1 inch (26mm) Dia. balanced-drive dome
Magnet Weight, Material 2oz. (57g), ceramic
Voice Coil Diameter, Material 0.53 inch (13.5mm), copper wire and ferrofluid
MECHANICAL
Basket 20 gauge stamped steel with black enamel finish
Outside Diameter 8.08 inch (205mm)
Mounting Bolt Circle 7.625 - 7.688 inch with 8 obround holes equally spaced at 45 degrees.
Cutout Diameter 7.2 inch (182mm)
Mounting Depth 3.85 inch (94mm)
Net Weight 3.5 lbs. (1.6kg)
THIELE-SMALL PARAMETERS
Pe ......................50W Qts ........................0.68 BL ............................7.5Tm Sd ..........................33.2 in
2
, 214cm
2
Fs ......................52Hz Qes ......................0.87 Efficiency,ηη............0.47% Mms........................20.6g
Xmax ................0.21 in., 6mm Qms ......................3.1 Vas ............................29.2 liters, 1782 cu.in Cms ........................0.45mm/N
Re ......................7.2Ω
Drivers with factory wired
transformer feature a steel bracket
mounted to the top of the backplate
to securely support the weight of the
transformer.
Specifications: Lowell Model 8A50 Coaxial Driver
Drivers
0.3 x 0.195 obround holes
Fits grilles with mounting bolt circle of 7.625" - 7.688"
8.062
7.625
3.85
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