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ACCESSORIES

GENERAL DESCRIPTION

The MM01 is a fixed charged condenser microphone 
designed especially for critical test and measurement 
applications. Manufactured with extreme care, superior 
electronics and the highest quality craftsmanship, the 
microphone delivers an exceptionally clear, accurate 
sound, with precision pattern control. The MM01 is a 
perfect compliment to any Real Time Analyzer, such 
as the D•1500 Digital RTA from Samson Audio. The 
microphone exhibits an extremely flat frequency response 
providing accurate results when measuring individual 
drivers or complete sound systems. Thanks to it’s low 
noise and linier frequency response, MM01 can also 
be used for miking acoustic instruments, or as ambient 
room mics for studio recording applications. In addition, 
the high SPL capability and omni-directional pick-up 
pattern makes the MM01 an excellent choice for a variety 
of specialty miking applications in live sound situations.

FEATURES

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  Precision, fixed charged condenser measurement 

microphone.

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  Extremely flat frequency response.

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  Linear, omni-directional pick-up pattern.

DI01 FEATURES

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  Digital Interface Module featuring AES/EBU and 

S/PDIF inputs and outputs

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  Gold plated XLR and RCA connectors

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 Standard BNC word clock connector

DN01 FEATURES

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  Module for controlling multiple D Class units

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  High speed, Bi-Directional network protocol using 

standard XLR cable and connectors

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  Allows the D•1500 RTA to monitor up to 15 D•2500 

equalizers on the LED display

AI01

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  +9 to 48 Volt phantom power operation.

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  Gold plated XLR connector.

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  The industrial designed is attractive while maintaining a 

compact and rugged construction.

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  A perfect compliment to any Real Time Analyzer, such as the 

D•1500 Digital RTA from Samson Audio.

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  Includes ABS carry case.

MM01 SPECIFICATIONS

Type ...............................................  Fixed charged Condenser 

microphone

Polar Pattern ................................... Omni-directional
Frequency Response ......................... 20 Hz to 20000 Hz
Sensitivity .......................................  -37 dbV/pa (14mv/pa)
Rated Impedance ............................. 200Ω
Max. SPL .........................................  132 dB (THD less than or 

equal to 0.5% 1000 Hz)

S/N Ratio ........................................ 71 dB, 1K, 1PA
Power Supply ...................................  9 52V Phantom power (IEC 

268-15/DIN 45596)

Weight ............................................ 130 g 

AI01 FEATURES

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  Analog Input/Output Module utilizing high quality 

AD/DA converters

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  100 db of dynamic range

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  Operates at 96k sample rates

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  Balanced XLR Inputs and Outputs

AI02 FEATURES

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  Analog Input/Output Module utilizing premium 

AD/DA converters

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  112 db of dynamic range

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  Operates at 96k sample rates

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  Balanced XLR Inputs and Outputs

MM01

AI02

DI01

DN1

PRODUCT SPECIFICATION SHEET

SERIES

 

DESCRIPTION

 

CATEGORY

D•CLASS

 

D•CLASS ACCESSORIES

 

DIGITAL SIGNAL PROCESSING

GENERAL DESCRIPTION

The D•2500 is a dual channel, 1/3 Octave, 31 Band 
Digital Graphic Equalizer featuring cutting edge 
DSP and analog-to-digital conversion technology, 
together with a simple to use, traditional analog user 
interface. The D•2500’s robust, 2 rack-space steel 
and aluminum extruded chassis design is not only road 
worthy, but it also provides a large front panel layout 
which is extremely easy to use and already familiar to 
audio engineers. The beauty of the D•2500 Graphic 
Equalizer is that it has 31 bands of real hands-on 
faders! You may forget that that you are using a digital 
EQ; just press the MANUAL button and “look mom, 
I’m equalizing the system!” And, with the high-end 
24 Bit AD and DA converters and 96K sampling 
rate, you’ll enjoy pristine audio quality. Thanks to the 
powerful DSP engine and clever software, the D•2500 
is capable of producing EQ curves with more accurate 
and precise filters, far exceeding the capabilities of 
even the best analog equalizers. What you won’t get 
is the accumulating additive hiss noise that you get 
from an analog equalizer when you push up the high 
frequency bands.
In addition to being a simple to use digital equalizer, 
the D•2500 is packed with all the goodies including 
HIGH & LOW PASS FILTER, NOISE GATE, LIMITER, 
ENHANCER, DELAY and FEED BACK MANAGEMENT.  
All these digital effects are programmable and their 
associated parameters can be stored, and recalled, 
as part of the 99 available user pre-sets. The HIGH 
and LOW PASS FILTERS allow you to quickly apply 
an EQ contour for rolling off the high and low end 
frequencies, for example, when equalizing vocal 
monitors. The D•2500’s NOISE GATE allows you 
to set a threshold level in order to mute any system 
hums and buzzes during silent sections keeping your 
system super clean. With the D•2500’s LIMTER you 
can control the level that you are sending to your 
power amplifiers to help you insure good protection 
for your loudspeakers. The onboard ENHANCER 
will actually add high frequency to the system when 
there is program material at those frequencies, 

adding extra sparkle to the mix. The ENHANCER will also 
automatically turn down the high frequencies when there 
is no high frequency signal content, which, by eliminating 
system noise and hiss, making the D•2500 a very effective 
noise reduction system. In addition, the D•2500 also offers 
on onboard DELAY for time aligning speakers. Another 
powerful feature of the D•2500 is feedback suppression. 
The D•2500’s feedback management system can be set 
to AUTO which will automatically find the frequency that’s 
feeding back and lower the associated filter. Or, you can 
use the feedback management system in MANUAL mode 
where the D•2500 will automatically find, and then display, 
the frequency that’s feeding back, showing which fader you 
should pull down manually. All settings and parameters for 
the equalizer and digital effects can be stored in 99 pre-set 
locations. Using the large, easy to read, LCD display and 
convenient data wheel, it’s possible to save your favorite 
equalization curves and recall them in the future. Or, when 
using the D•2500 together with the D•1500 Real Time 
Analyzer, you can auto-correct the room to a flat response, 
and then apply your favorite system curve on top. In addition, 
the powerful LOAD MASK allows you to recall certain effects 
or EQ curves from any preset independently, so you can add 
pre-set effects settings with real time changes.
The D•2500 features standard MIDI implementation and 
Samson’s D•Net, enabling device-to-device linking for 
creating larger audio systems or for interfacing to a personal 
computer. When linking the units you see the full power 
of the D•Class system. With a basic MIDI connection, the 
fader positions of the D•2500 digital EQ can be displayed 
on the D•1500 Real Time Analyzer, giving you the power 
of digital processing with a unique analog feel. For systems 
using many D•Class units, the D•2500 can be fitted with the 
DN1 D•Net network card. Samson’s D•Net is a high-speed 
communication protocol for connected multiple D•Class 
units, like the D•2500 digital equalizer, D•1500 RTA or 
D•3500 feedback management system. In addition to being 
10 times faster than MIDI, the error rate is so close to zero, 
it’s difficult to measure. All settings and parameters can be 
stored in any of the 99 preset locations providing instant 
recall of your favorite setups. Like all D•Class models, the

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TYPE:

DIGITAL SIGNAL

PROCESSORS

PRODUCT 

DESCRIPTION

D

2500 

DIGITAL EQUALIZER

SERIES

  

CATEGORY

D•CLASS

 

DIGITAL SIGNAL PROCESSING

©2006 Samson v1.0 5/06

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