Adamson M15 User Manual

Contents:

Section 1:

Introduction p.4

Section 2:

The essential multi-purpose box p.5

ND-15 p.5

Cabinet Symmetry p.5

Section 3:

Active/Passive operation p.6

Section 4.:

Processing and Presets p.7

Section 5:

Technical Specifications p.8

Section 6:

MASS™ rigging p.9-21

6.1 Warning

6.2 Multi-Purpose Plate

6.3 Pole Mont Rigging

6.4 C-Clamp Rigging

6.5 Flytrack Rigging

6.6 Single and Dual Axis Rigging

Section 7:

Custom Flightcase p. 22

It is compulsory to read this user manual before operating M15’s . Supervision and competency
are the responsibility of the system owners and operators. Owners and operators are responsible
for inspecting the rigging and ensuring that it has not been damaged in transport, from misuse, or
wear and tear. M15 loudspeakers are easily capable of generating high sound pressure levels that can

cause permanent hearing damage and should be operated by personnel with experince in professional
audio.

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Section 1.0

Introduction

This manual is intended to demonstrate and help M15 owners with the operation of the M15 and its optional MASS™
(Multi Angle Suspension System) rigging system.

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Section 2.0

The Essential Multi-Purpose Box

The M15 is a multi-purpose high output enclosure, that can be used as a stage monitor, FOH system, center enclosure,
or as a fill device.

The M15’s symmetrical cabinet design facilitates mirror imaging when used as a stage monitor by maintaining the
same projection angle. The indescreet simplified Adamson logo indicates the low LF driver end. When placed side to
side with the logos facing the low frequencies will couple. When placed on the opposite side, the horns will couple

The M15 employs a switch which allows bi-amped or passive operation. It uses internal crossover circuitry when in
passive mode, which is automatically by-passed when in active mode.

The cabinet is loaded with a single ND-15L, a 15 inch LF driver which incorporates a lightweight long excursion
neodymium magnet, enhancing output, delivering superior powerhandling and providing consistently stable low end
frequency response.The ND-15’s basket utilizes an enlarged heat sync and thermal fins which draw heat away from the
coil, lowering its operating temperature and improving thermal compression.

Constructed from Baltic birch, it is designed to
accept a multi-purpose rigging plate that allows
several different methods of flying the cabinet
(see Rigging section).

The ND-15 is the only driver with zero-axial
modes in it’s entire passband. (60-800 hz) This
substantially increases the linearized mid-band
response.

Compared to traditional paper cones, the
multilayer Kevlar cone along with advanced cone
architecture, offers superior performance, zero fatigue and eliminates cone modes in the passband.

The internally bracd birch cabinet is sealed at
all joint abutments are is finished in a weather
resistent powdercoat, and the screen is
laced with replaceable, acoustically
transperent
open cell grill cloth. The cabinet is loaded with
a 50 degree conical fiberglass acoustic

M15 User Manual Page 5 of 24

Section 3.0

In full range mode with presets the frequency response of the M15 is 60hz-18khz with a +-3db variation factor.
The crossover point between low and high frequency components is 800hz. . Always use presets when operating the M­15, whether in active or passive mode.

Adamson recommends powering the M15 with a Lab.gruppen fP3400 stereo amplifier producing 1100w per channel
@8ohms, and providing AC, VHF, thermal, DC and clip limiting protection.

In passive mode, up to two cabinets can be linked on one channel. In passive mode all signals are routed to one
channel of the fP3400.

To select active mode, switch the protected toggles on the rear of the cabinet.
With the bi-amped setting, you enable up to two cabinets to be powered by two channels of a single fP3400. In a 2­way active configuration the LF and HF signals are routed sepearately to the amplifier channels.
It can also be paralleled to other M15’s through four NL-4 Speakon connectors. Using one of the four connectors for the
speaker input allows a second connector to function as a feed to jump additional cabinets.

1. Remove the backplate to access the dipswitches. Choose active or passive mode and replace the cover with the
indicator facing the appropriate direction.

Active/Passive Operation

In passive mode , Pins 1+/1- of all four
NL4 connectors feeds the full range signal
to the High and Low frequency drivers,
through their own passive crossover units.

M15 Passive

1. exposed dipswitches-Ensure

that both switches are set to either

active or passive mode at any

one time.

In active mode the Lap.gruppen

fP3400powers up to two cabinets. Pins

1+/1- of the four connectors carry the

LF signal and pins 2+/2- of the four

connectors carry the HF signal. The pin

configuration is automatically changed

when Bi-amped active mode is selected.

M15 Active

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Section 4.0

Processing and presets

Adamson recommends processing signals with the Adamson M Series digital processor, but factory presets are
available for approved digital signal processors, and are available through either the official Adamson website (link be­low) or by request.

www.adamsonproaudio.com technical_support/presets/index.htm

M-series Processor Presets are determined through polar measurements and spacial averages to optimize equalization,
crossover points and time alignment.

M15 Preset librairies for XTA’s processors can be obtained from the Adamson website, by request from your local
Adamson distributor or the Adamson Head office, and are applied using audio-core software.

Adamson’s X-Link software controls the M-Series Digital

Processor.

Below is a reference chart of XTA DP224 V.11 presets.

For up to date presets check the above website link.

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Section 5.0

Technical Specifications

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