Overview

One of Lowell’s “A-Series” drivers representing a deliberate move up in sound quality and performance over standard com- mercial coaxial drivers, the 6A40 is engineered for very high quality music and paging.

Features

• 40W coaxial 6.5 inch driver for music and paging
• Wide angle of sound distribution (120 degrees conical) over a large area with uniform response and clear audibility ensures complete coverage with minimum units.
• 10 oz. magnet coupled with 1 in. copper voice coil driving a polypropylene cone with half-roll rubber surround for long cone travel and good edge damping.
• Post-mounted tweeter is a 1in. balanced drive dome protect- ed by Ferrofluid and a first order high-pass filter.
• Stamped 20 gauge steel frame with black enamel paint finish and zinc-plated backplate.
• Meets or exceeds all applicable EIA standards.
• Compatible with Lowell backboxes and architectural grilles. Not for use with torsion grille unless IX Series backbox is used.
• Optional factory-wired transformer (Speaker No. 6A40-T870 includes transformer TLM-870) has tap selections at 1, 2, 4, 8W (70V) and includes a bracket mounted to top of magnet for secure support.

Specifications

PERFORMANCE

• Power Handling: 40 watts RMS (nominal)
• Sensitivity: 91dB SPL (peak), 88dB SPL (avg) measured 2.83V @ 1m
• Impedance: 8 ohms (nominal), 8.1 ohms @170Hz (minimum)
• Frequency Response: 40Hz-20kHz (nominal), 40Hz-20kHz (+6dB)
• Crossover Frequency: 4000Hz, 1st order high-pass filter
• Dispersion Angle: 120 degrees conical @ 2000Hz octave (-6dB)
• Speaker Spacing: To determine speaker spacing, see the technical paper “Distributed System Speaker Spacing for the Integrator” available for free download at LowellMfg.com. An online spacing calculator is also available.

PHYSICAL - WOOFER

• Cone Material: Polypropylene with rubber half-roll (up) surround
• Magnet Weight, Material: 10oz. (283g), ferrite ceramic
• Voice Coil Diameter, Material: 1 inch (25mm), 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 with Ferrofluid

MECHANICAL

• Basket: 20 gauge stamped steel with black enamel paint
• Outside Diameter: 6.5 inch (165mm)
• Mounting Bolt Circle: 6.13 inch (156mm) with 8 obround holes equally spaced at 45 degrees.
• Cutout Diameter: 5.7 inch (145mm)
• Mounting Depth: 3 inch (76mm)
• Net Weight: 2.1 lbs. (0.96kg)