Meyer Sound ASHBY-8C-5-ATTN, ASHBY-8C-NEW-CONST Data Sheet

DATASHEET

[Ø321.0mm]

Ø

12.64in

[287.6mm]

Ø

11.32in

STELLA 8XPC

[Ø321.0mm]

Ø

12.64in

[287.6mm]

Ø

11.32in

STELLA 8XPC

Ashby-8C Ceiling Loudspeaker

Ø

12.64in

[Ø321.0mm]

Ø

11.32in

[287.6mm]

Outside Dimensions 12.64 in (321,0 mm) diameter

8.87 in (225.3 mm) depth: front of ceiling surface to built-in
safety attachment ring

Cutout Diameter Range 11.42 - 11.83 in (290.0 - 300.4 mm)
Weight 13.8 lb (6.26 kg)
Enclosure Zinc-plated steel-back can and UL 94V-0 rated baffle
Grille Perforated steel 12.97 in (329.2 mm) in diameter
Mounting Options C-Ring with bridge kit, new construction bracket, and pendant mount

Ø12.97in

[Ø329,3 mm]

ULTRA SERIES

7.92in

.72in

[18.3mm]

[201.2mm]

8.87in

[225.3mm]

The Ashby-8C self-powered, ceiling-mounted
loudspeaker provides wide coverage and low
distortion, even at high sound levels, for appli
cations that require accurate music reproduction
and intelligible voice. The Ashby- 8C is ideal for
applications that require a deeper low-end and
higher SPL. It offers sonic performance beyond
other in-ceiling loudspeakers of comparable size

The Ashby-8C is engineered to the same
award-winning standards as all Meyer Sound

lligentDC loudspeakers. With on-board

Inte
amplification with sophisticated signal
processing, the Ashby-8C exhibits the flat
frequency and phase response for which
Meyer Sound loudspeakers are known

The Ashby drivers are designed and manufac­tured at the Meyer Sound factory in Berkeley,
California. The 0.75-in metal-dome tweeter
is concentrically mounted over an 8-in cone
driver in an innovative configuration that
maximizes the surface of the wave guide.

With an incredibly smooth, consistent 100°
coverage, fewer loudspeakers can cover a
larger area, reducing system cost while main­taining the highest sound quality.

Features & Benefits

Self-powered



Easy to install



Extremely wide and consistent coverage



Ultra low distortion



.

The Ashby-8C requires an external MPS­488HP IntelligentDC power supply. The 19-in

-

(1 RU) unit distributes DC power and balanced
audio to Ashby loudspeakers or other Meyer
Sound IntelligentDC loudspeakers. Composite
multi-conductor cables (e.g., Belden® 1502)
can deliver both DC power and balanced audio

.

from a single Phoenix™ 5-pin male connector.

The MPS-488HP can power up to 16 Ashby-8C
loudspeakers (2 per channel) and can connect
to Meyer Sound’s RMS remote monitoring sys­tem. Using IntelligentDC to supply power from
an external source has several advantages:

Eliminates the need to use conduit



(Class 2 wiring).

Allows longer, lighter-gauge cable runs.



Preserves the advantages of self-



powered systems with even more
flexible installation options.

Exceptional SPL-to-size ratio



Beautiful low frequency response and



reproduction of speech and music

Supports long cable runs with



light-gauge cablesOne MPS-488HP can
power up to 16 Ashby-8Cs

Housed in an integrated metal back-can to
meet commercial fire codes, the Ashby-8C
can be flush-mounted in ceilings using a low­profile grille that blends discretely into any
décor. The following Meyer Sound accessories
are designed specifically to install Ashby loud­peakers into a variety of ceiling environments:

C-Ring with Bridge Kit



suspended ceilings, the C-ring better
distributes the clamping force of the
four mounting clamps, while the bridges
help support and distribute the weight of
the loudspeaker.

New Construction Bracket



bracket can be fastened to the ceiling
and acts as a template for ceiling cutout,
ensuring a neat installation.

Ashby Pendant



loudspeakers to hang from ceilings
where a flush-mount is not practical.
These elegant pendant enclosures utilize
a minimalistic design typically used in
pendant lighting to blend discreetly into
the environment.

: Used for

: This

: Allows Ashby

Applications

Distributed systems for music and paging



that demand high-quality audio and
vocal intelligibility

Constellation acoustic systems



Specifications

Acoustical

Coverage

Transducers

Connector Panel

Input

Amplifier

DC Power

Safety Agency Rated Operating Range5 48 V DC

Maximum Long-Term Continuous Current (>3 sec) 0.78 A rms

Compliance

Maximum Cable Lengths

Number of

Speakers

1 1200 750 475 300 320 175 90 55

2* 600 375 237 150 160 87 45 27

* this applies to one 8C and one 5C looped

Operating Frequency Range1 60 Hz - 18 kHz

Frequency Response2 67 Hz - 16 kHz ±4 dB

Phase Response 190 Hz - 16 kHz ± 45

Linear Peak SPL3 106.5 dB, Pink noise

Coverage 100

Low Frequency One 8-in cone driver

High Frequency One 0.75-in dome tweeter mounted concentrically

Audio/Power Connector Two 5-pin female Phoenix (one input and a hard-wired loop output)

Nominal Input Sensitivity -2.5 dBV (0.25 V rms, 1.00 V peak) continuous average is typically

Audio Input Source Audio source must be capable of producing +16 dBV (6.3 V rms, 9.0 V

Maximum Instantaneous Peak Current 3.10 A peak

Meyer Sound Power Supply Required For information and specifications on the Meyer Sound MPS-488HP

Safety Agency certification: Standard for audio, video and similar electronic apparatus:

6

Maximum Cable Length (feet) - imperial Maximum Cable Length (meters) - metric

12 AWG 14 AWG 16 AWG 18 AWG 2.5 mm

EMC Certification: CE and FCC Part 15 Emission Class B emission limits applied.

Pinout Two pins for 48 DC power, three pins for balanced audio

Power Wiring Pin 1: DC Power (-)

Audio Wiring Pin 3: Audio shield, chassis/earth

Impedance 10 k

Output Power4 220 W (440 W peak)

Cooling Natural convection through the metal enclosure

48V DC Powered from Meyer Sound MPS-488HP Power Supply

Current Draw

Idle Current 0.16 A rms

109.5 dB, B-noise

114.0 dB, M-noise

°

conical

in wave guide in front of 8-in driver

Pin 2: DC Power (+)

Pin 4: Signal (-)

Pin 5: Signal (+)

LED Displays loudspeaker status

Type Differential, electronically balanced

Type High efficiency Class D

Ω Balanced (AC Impedance)

the onset of limiting for noise and music

Where pink noise has 12dB Peak to RMS ratio

peak) into 600
operating bandwidth of the loudspeaker with a sine wave.

Approved for Class 2 Wiring used in conjunction with MPS-488HP

IntelligentDC external power supply, refer to its datasheet.

UL 60065, CSA C22.2 NO. 60065-03 (AMD 2),IEC 60065,IEC 62368-1
Fire Rated to UL Standard 2043, Product and Accessories Installed in
Air-Handling Spaces

°

Ω to produce the maximum peak SPL over the

2

1.5 mm21.0 mm20.75 mm

Notes

1. Recommended maximum operating
frequency range. Response depends on
loading conditions and room acoustics.

2. Half-space loading, measured with
octave frequency resolution at 4 m.

3.

Measured at 4 m and referred to 1 m.

Pink noise is an unfiltered, full range test signal
with an average-to-peak ratio of 12.5 dB.

B-noise is a Meyer Sound test signal used to
ensure measurements reflect system behavior
when reproducing the most common input
spectrum, and verify there is still headroom
over pink noise.

M-noise is a full-range signal developed
by Meyer Sound to better measure the
loudspeaker’s performance with music. It has
a constant instantaneous peak level in octave
bands, a crest factor that increases with
frequency, and a full bandwidth peak-to­average ratio of 18 dB

4. Amplifier wattage rating is based on the
maximum unclipped burst sine wave rms
voltage the amplifier will produce for at
least 0.5 s into the nominal load impedance:
30 V rms (42 V peak).

5. Tolerates voltage drops up to 30% due to
long cable runs. Normal operating conditions
with recommended cable gauge, length, and
number of loudspeakers assures peak SPL to
remain within 2 dB of max SPL specification.

6 Some high frequency loss can occur from long

analog audio cables. For lengths greater than
500 ft (150 m), Meyer Sound recommends
using low capacitance shielded audio cable or
AES Digital audio cable. Discuss expected high
frequency loss with the cable manufacturer to
determine acceptability.

2

.

Ashby-8C

04.26

0.004.01A

Copyright © 2017
Meyer Sound Laboratories Inc.
All rights reserved

meyer sound laboratories inc.

2832 San Pablo Avenue
Berkeley, CA 94702

T: +1 510 486.1166

[e-mail]
www.meyersound.com

1

/3-

Architectural Specifications

The loudspeaker shall be self-powered and
include one 8-in (203.2 mm) diameter coaxial
transducer and one 0.75-in (20 mm) dome
tweeter mounted concentrically in wave guide
in front of the 8-in driver.

Performance specifications for a typical pro­duction unit shall be as follows, measured at
1/3-octave resolution: operating frequency
range,

60 Hz - 18 kHz

°

kHz ±45

and a conical coverage of 100 degrees.
The loudspeaker shall be capable of maximum
linear peak SPL of 114 dB peak at 1 m measured
using M-noise, a full-range signal developed
by Meyer Sound to better model the loudspeaker’s
performance with music.

The loudspeaker shall be equipped with two
Phoenix 5-pin male connectors (pins 1, 2
for 48 V DC power, pins 3, 4, 5 for balanced
audio). One shall be the input, the second
connector shall be hard wired for looping.

; phase response, 190 Hz

– 16

The audio input shall be electronically balanced
with a 10 kohm impedance and shall accept a
nominal -2.5 dBV (0.25 V rms, 1 V peak) signal

The loudspeaker shall incorporate a highly
efficient Class-D power amplifier with a total
output power of 220 W (440 W peak).

Power requirements for the loudspeaker shall
be a Meyer Sound MPS-488HP power supply,
capable of delivering 48 V DC. Current draw
for the loudspeaker shall be 0.16 A in idle state
and its maximum long-term continuous cur­rent draw shall be

0.78 A with a duration of

less than 3 s.

The loudspeaker shall tolerate voltage drops up
to 30% caused by long cable runs when con­nected to one channel of the required power
supply. Maximum cable run for a single unit is
300 ft with 18 AWG (90 m with 1.0 mm
maximum cable run for two looped units is 150
ft with 18 AWG (45 m with 1.0 mm

2

).

2

) and the

Loudspeaker components shall be housed in
a zinc-plated steel enclosure which shall also

.

include a UL94V-0 rated baffle. The enclosure
shall incorporate also 4 mounting clamps for
flush-mount installations in ceilings and walls
with a minimum depth of 8.87 in (225.3 mm).
Grille shall be made of perforated steel and its
diameter shall be 12.97 in (329.3 mm).

Dimensions shall be 12.64 in (321 mm) in
diameter and 8.87 in (225.3 mm) in depth

front of ceiling surface to built-in safety

(

attachment ring

). Cutout diameter range
shall be 11.32 - 11.75 in (287.6 - 298.4 mm).
Weight shall be 13.8 lb (6.26 kg).

The loudspeaker shall be the Meyer Sound
Ashby-8C.