[PDF] 65 in Coaxial Compression Driver • Optional Transformer

8” Coaxial Speaker (optional transformer)

For 25 or 70 7 volt distributed systems: The loudspeaker shall be 8” Coaxial Speaker (optional transformer) ©2012 Lowell Manufacturing Company, 100 Integram Dr

RCS5XT Coaxial 1 Torsion-Mount Speaker Package

Ł Coaxial for Smooth High-Frequency Dispersion Ł Dual 70 7/25-volt Xfrmr with Spade-lug Taps Ł Terminal Block Connection DESCRIPTION The Penton Audio RCS5XT is a premium speaker package with a coaxial 5-1/4 fl speaker mounted to a CRS, torsion-mount baffle, complete with an attached high-quality, dual-voltage transformer

65 in Coaxial Compression Driver • Optional Transformer

For 70 7 volt distributed systems:(Model No 6A40-T870 only) The driver shall be equipped with a transformer, factory mount-ed and wired The transformer’s primary voltage shall be 70 7V and shall provide selectable power taps of 1, 2, 4, 8 watts Transformer frequency response shall be 50Hz –15kHz+1dB, with maximum insertion loss of 0 8 dB

RCS8XT Coaxial 1 Torsion-Mount Speaker Package

Ł Dual 70/7/25-volt Xfrmr with Spade-lug Taps Ł Terminal Block Connection DESCRIPTION The premium Penton Audio RCS8XT speaker package uses a coaxial, 8 fl cone loudspeaker with 10-ounce magnet and 1fl Mylar dome tweeter complete with a 1/2fl moving coil and neodymium magnet This model is fully assembled including transformer and grille

QCS-810CXBT-WG

8" Coaxial Speaker with 25/70 Volt transformer & Attractive Grille Haut-Parleur Plafonnier 8’’ Coaxial avec transformateur 25/70V et Grille Stylisée General Description: Features: Caractéristiques: • High intelligibility with exceptional uniform coverag • Haute intelligibilit avec une couverture uniforme exceptionnelle

QCS-65TX

6 5" Coaxial Speaker with 25/70 Volt transformer & Attractive Grille Haut-Parleur Plafonnier 6 5’’ Coaxial avec transformateur 25/70V et Grille Stylisée General Description: Features: Caractéristiques: • High intelligibility with exceptional uniform coverag • Haute intelligibilit avec une couverture uniforme exceptionnelle

Speaker Assemblies - Accessories

Cone Speaker with pre-mounted 5 Watt, 25 Volt and 70 Volt Line Transformer Speaker assembly 8” Full Range, Coaxial Speaker with pre-mounted 10 Watt, 25 Volt and 70 Volt Line Transformer Line Transformer T2570/10 - 10 Watt, 25/70V Ceiling Speaker Back Box ERD8 -Closed Steel Enclosure Ceiling loudspeaker tile bridge Permits mounting

XT550 Outdoor/In-Ground Speaker

Volt input, 1 meter) shall be at least 86 dB The maximum continuous output at 1 meter shall be 101 0 dB Rated power capacity of the components and network shall be at least 60 Watts continuous RMS power The loudspeaker shall have a nomi-nal impedance of 4 Ohms and be available for 25/70 7/100 Volt modes with transformer bypass position

12 Transformers, Impedance Matching and Maximum Power Transfer

transformer is voltage step-down, it is current step-up ) The equation for current corresponding to equation (1) is (2) Ip Is = Ns Np So the current is inversely proportional to the number of turns If we are lucky the manufacturer of a transformer publishes the ratio of turns for the transformer r = Np ‚Ns For example, you might be given

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Spec No. 1588 | Rev. 07.12.22 | pg 2/3

Heard Everywhere Since 1947

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.

A&E Specifications

The driver shall be Lowell Model No. _______ (6A40, 6A40-T870) which shall be of the coaxial type having electrically independent high and low frequency transducers. The low frequency section shall have a 6.5 inch diameter polypropylene cone and the high frequency section shall have a tweeter with a 1" balanced-drive dome. A built-in electrical crossover network shall be employed to accomplish the proper frequency division between the two drivers. The crossover frequency shall be at 4000Hz with a first order high-pass filter. The driver shall be capable of pro- ducing a uniform audible frequency response over the range of

40Hz-20kHz+6dB with a dispersion angle of 120 degrees con-

ical @2000Hz-6dB. The average sensitivity shall measure 85dB (SPL at 1W/1M). Rated power handling shall be 40 watts RMS. The low frequency voice coil shall have a diameter of 1 inch and shall operate in a magnetic field derived from a ferrite (ceramic) magnet having a nominal weight of 10 oz. The high frequency voice coil shall have a diameter of 0.53 inches and operate in a magnetic field derived from a ferrite (ceramic) magnet having a nominal weight of 2 oz. The voice coil impedance shall be 8 ohms. The driver shall have a round, structurally reinforced stamped 20 ga. steel frame to maintain precise mechanical alignment and

shall provide facilities for mounting a transformer. The driver shall have an overall diameter of 6.5 in. with eight obround holes

equally spaced at 45 degrees on a 6.13 in. diameter mounting bolt circle. The mounting depth shall not exceed 3 in. (not includ- ing optional transformer). External metal parts shall be finished in black enamel paint or zinc plating to resist rust and corrosion. For 70.7 volt distributed systems: (Model No. 6A40-T870 only) The driver shall be equipped with a transformer, factory mount- ed and wired. The transformer's primary voltage shall be 70.7V and shall provide selectable power taps of 1, 2, 4, 8 watts. Transformer frequency response shall be 50Hz -15kHz+1dB, with maximum insertion loss of 0.8 dB.

Model No.

6A40

6.5 in. Coaxial Driver

Optional TransformerLowell makes every effort to provide accurate information while reservin g the right to change specifications and/or improve manufacturing methods without notification. ©2022 Lowell Manufacturing Company, 100 Integram Dr., Pacific MO 6306

9 | 800.325.9660 | www.lowellmfg.com

Spec No. 1588 | Rev. 07.12.22 | pg 2/3

Heard Everywhere Since 1947

Compatible Accessories (order separately)

IX610 Backbox CRS 10.063Dia x 10.063D, Direct mnt spkr-no load on grille + bat ting CN8M Grille CRS 12.5Dia, torsion mount, gentle contour design, white

Driver Model No. Summary

Model No.

Description Size (in) Depth (in) Transformer Taps

6A40

40W coaxial driver 6.5 3 ---

6A40-T870

40W coaxial driver w/transformer 6.5 5.4 1, 2, 4, 8W (70V)

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)

THIELE-SMALL PARAMETERS

Pe ...................40W Qts ......................0.53 BL .........................6.4Tm Sd..................20.6 in

2 , 133cm 2

Fs ...................51Hz Qes .....................0.66 Efficiency, h .........0.37% Mms ..............13g

Xmax ..............0.1 in., 2.5mm Qms ....................2.8 Vas........................19 liters, 1160 cu.in Cms ..............0.76mm/N

Re ...................6.5

Driver Specifications

0.3" x 0.195 obround holes

Fits grilles with mounting bolt circle of 7.625" - 7.688" Lowell makes every effort to provide accurate information while reservin g the right to change specifications and/or improve ma nufacturing methods without notification. ©2022 Lowell Manufacturing Company, 100 Integram Dr., Pacific MO 6306

9 | 800.325.9660 | www.lowellmfg.com

Spec No. 1588 | Rev. 07.12.22 | pg 2/3

Heard Everywhere Since 1947

Lowell drivers and loudspeaker systems are tested to provide specifiers and contrac- tors with data that reflects the performance of production products. Testing equipment includes the GoldLine TEF-20 analyzer (for performance measurements) and the LinearX LMS measurement system (for Thiele-Small Parameters). Power Handling capability is tested based on EIA Standard RS-426B. Frequency Response data is provided which is the measured frequency response range (defined by + 6dB) which is useful in predictive engineering calculations. Sensitivity (SPL) data is presented in two ways: Log Average SPL is a computer cal- culated log average of the SPL measured at 1 meter with 1 watt input over the stated frequency response range. Maximum SPL is calculated based on the measured log average SPL and the 8-ohm power rating of the speaker. Maximum SPL for loud- speakers which do not include an 8 ohm input, is calculated based on the measured log average SPL and the highest transformer power tap. Dispersion Angle is defined as the angle of coverage that is no more than 6dB down from the on-axis value averaged over the 2000Hz octave band. Since speech intelligibility is very dependent upon the 2000Hz octave, this specification is quite useful in designing speech reinforcement systems that provide even coverage and speech intelligibility. Thiele-Small Parameters for raw drivers are measured using the LinearX LMS mea- surement system. These parameters are useful in determining the optimum type and size of enclosure for a specific driver. Impedance data is presented in three ways: Nominal Impedance is the generally accepted impedance for use in making comparisons with competitive products, the Impedance Curve is a graphical representation of the impedance that is m easured in the lab and gives the impedance of the device over the audio frequency range, Minimum Impedance is the lowest impedance measurement at a frequency within the specified frequency response range of the speaker. If a line matching t ransformer is included in the speaker assembly, relative impedance curves of the primary windings of the transformer when loaded by the driver may be shown. Polar data is presented for the averaged one octave band surrounding the center frequencies of 1000Hz, 2000Hz, 4000Hz, and 8000Hz. Radial polar response curves show the relative change in sound pressure level as one moves from directly on-axis to an increasingly off-axis listening position. Since coaxial speaker drivers are symmetri- cal in the vertical and horizontal directions, only one set of polar plots will be presented for coaxial drivers and speaker systems incorporating coaxial drivers. Vertical and horizontal polar plots will be presented for two-way speaker systems that incorporate separate low frequency and high frequency drivers.

1000Hz octave 2000Hz octave 4000Hz octave 8000Hz octave

Polar Data

ImpedanceImpulse

Scope of Lowell Performance & Power Tests

Lowell makes every effort to provide accurate information while reservin g the right to change specifications and/or improve ma nufacturing methods without notification. ©2022 Lowell Manufacturing Company, 100 Integram Dr., Pacific MO 6306

9 | 800.325.9660 | www.lowellmfg.com

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