Stealth Acoustics SA2400 MKII Manuale utente

Download the Stealth Signal Management System

software for powerful DSP programming tools.

StealthAcoustics.com/sa2400-mkii

SA2400 MKII User Guide

2-Channel Ampliﬁer with DSP

Front Panel

1. Power Button with indicator light

(red when powered o)

2. IR Sensor

3. Main Menu Button

4. Menu  Navigation Buttons

5. Enter/Ok Button

6. Return to Previous Menu Button

7. Display Screen

8. Volume -/+ Buttons

9. Clipping Lights

10. Removable Rack Ears

Rear Panel

11. XLR Balanced Line Output

12. RCA Unbalanced Line Level Output

13. RCA Unbalanced Line Level Input

14. XLR Balanced Line Input

15. Ground Lift Switch (for hum reduction use)

16. Speaker Level Input/Output Terminal Block

17. Optical Input

18. 12V Trigger (In/Out)

19. No Signal Auto-Mute Switch (default = ON)

20. USB (Type B) for Computer Connection

21. Main Power Switch

22. Channel 1 Speaker Binding Posts

23. Channel 2 Speaker Binding Posts

24. Voltage Indicator

25. 115V-230V 50Hz / 60Hz AC Inlet

(Auto Voltage Select)

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IMPORTANT SAFETY PRECAUTIONS:

 Read these instructions and keep this guide for future reference.

 Do not block ventilation openings.

 Do not install near any heat sources such as radiating heat registers, or other apparatuses that produce heat.

 Do not expose this equipment to rain or moisture.

 Do not defeat the safety purposes of the polarization or grounding type plug.

 Ensure proper AC mains power cord is connected.

 Clean only with a soft dry cloth.

 Refer all repairs to a qualiﬁed service professional.

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QUICK START

 Connect audio source to ampliﬁer

using appropriate input jacks.

 Connect speakers to speaker output

binding posts noting proper polarity.

 Connect appropriate AC power cord to AC inlet

and to AC mains source (115v-230v 50Hz / 60Hz).

 Turn on sound source to normal level.

 Turn on SA2400 ampliﬁer. (Volume will fade in

to factory default level of 40 dB or last setting.)

 Adjust volume using front panel controls.

 Program DSP features using the front panel

controls. (See Front Panel Programming

section in this document.)

 Download Stealth Signal Management

System (SSMS) software for free from

StealthAcoustics.com for additional interfacing

capabilities. A Windows™ based computer must

be connected via USB to use this feature.

OVERVIEW

The SA2400 ampliﬁer is a reliable high-current power

source for Stealth speakers and subwoofers, as well as

for powering any traditional loudspeaker. The SA2400

features fully-independent channel programming for

maximum ﬂexibility and incorporates powerful internal

Digital Signal Processing (DSP) which may be conﬁgured

using the front panel buttons, or by using the Stealth

Signal Management System (SSMS) software on a USB

connected Windows™ based computer.

SA2400MKII FEATURES

 12V Trigger Function

 450W per Channel (@ 4Ω)

 Programmable Channel Assignment of

Inputs (including mono-summing)

 Variable High Pass and Low Pass Filters with

Filter Slope Selections (per channel)

 Eleven Bands of Fully-Parametric EQ (per channel)

 Full Limiter Stage with Variable Threshold,

Attack, Release, Ratio and Knee (per channel)

 Delay (100 milliseconds maximum) (per channel)

 Internal Pink Noise Generator

 Ten Savable and IR Recallable

Internal Ampliﬁer Presets

 Stealth Factory Optimization Presets

for Quick and Repeatable Tuning of

Stealth Speakers and Subwoofers

 Full File Management via Optional Free SSMS

software for Storing Unlimited Conﬁgurations

 IR Control of Volume and Preset Selection

 Input Pass Through Selectable

Either “Pre” or “Post “ DSP

INTERNAL PRESETS

Presets store and recall a complete DSP state of the

ampliﬁer (other than routing, utility and master volume

settings) and are a quick way to setup a Stealth speaker

system, or change usage modes (EG: day mode / night

mode, etc.). Presets may be recalled via IR command;

from the front panel menu; or via Stealth’s SSMS

software. (See Software Programming section in this

document.)

The SA2400MKII has 10 internal ampliﬁer DSP presets:

 Presets are used to recall and

store speaker optimizations,

EQ, individual channel levels, or

other ampliﬁer DSP settings.

 The internal ampliﬁer Presets

are pre-loaded with factory

optimization parameters for Stealth

speakers and subwoofers.

 Presets may be reconﬁgured and saved

via the front panel buttons, or for more

versatility, by using SSMS software

and a USB connected computer.

 Additional custom or factory preset

conﬁgurations and unlimited ampliﬁer

DSP conﬁgurations may be stored and

recalled using Stealth SSMS software

and a USB connected computer.

Preset 1 LR6G optimization (stereo)

Preset 2 LR8G optimization (stereo)

Preset 3 LR3G optimization (stereo)

Preset 4 LRX-85-ACT optimization (bi-amp)

Channel 1 Low Frequency

Channel 2 High Frequency

Preset 5 LRX-83 optimization (stereo)

Preset 6 StingRay 6 optimization (stereo)

Preset 7 StingRay 8 optimization (stereo)

Preset 8 B22G | B30G | StingRay 430 | Image Sub (subwoofer)

Channel 1 & 2 conﬁgured for subwoofer use

Preset 9 LRX-85 optimization (stereo)

Preset 10 Full Range + Subwoofer optimization (bi-amp)

Channel 1 Low Frequency - SR430

Channel 2 High Frequency - StingRay 6

FRONT PANEL PROGRAMMING

While using SSMS software programming is preferred for quickly adjusting the DSP functions, you may also perform

all DSP programming from the front panel buttons as well as adjust other parameters like input routing, pre/post DSP

pass through settings, input defaults and front panel display brightness. Please refer to the front panel diagram for the

location of the following Menu and Menu Navigation buttons:

 Main Menu Button - Accesses the front panel menu structure; select individual channel, or both channels together

for programming.

 Menu  Navigation Buttons - Steps through the available menu items.

 Enter/Ok Button - Selects the displayed menu item.

 Return to Previous Menu Button - Reverts to the previous Menu item. Multiple presses exits the menu, returning the

display back to normal operation.

Below are non-DSP programming features of the SA2400. These and certain other functions are accomplished only

from the front panel buttons. See the Programming Menu - Front Panel Navigation diagram in this document for

complete menu programming options.

Setup Menu - Input Assign

Input routing and other non-DSP “Utility” functions are accomplished via the front panel menu buttons under the

Setup/Input Assign menu (see Programming Menu - Front Panel Navigation diagram). You may assign any physical

input channel to either or both ampliﬁer channels. This allows for functions such as “mono-summing” of the stereo

inputs into two mono signals, or to map inputs to dierent outputs. Default assignment is: Chnl1=Chnl1; Chnl2=Chnl2.

Pass Through Output Assign

Selects whether the line level pass-through outputs are tapped before or after the DSP stage. When in “Pre-DSP”

(default) mode, the pass through outputs are unaected by DSP programming. In “Post-DSP”, any DSP programming

of input signals is sent to the line-level output jacks. Default setting is “Pre-DSP”.

DSP Presets

10 internal DSP presets may be recalled and saved using the front panel buttons, or via IR commands. Factory settings

for optimizing Stealth speakers are pre-installed in the presets, which may be altered, renamed and re-saved depending

on need. See Internal Presets section for more details on DSP presets.

Display Brightness

The front panel LCD display brightness is adjustable as “Bright” or four levels of “Dim” to suit the installation needs.

Utility Functions

A built in Pink Noise Generator is available under the Utility menu, as well as ﬁrmware version information and factory

default settings.

Auto Input Sensing

The ampliﬁer may be set to automatically detect an Optical or Analog input, or to amplify only the Analog, or Digital

Optical inputs. Default = Auto (ampliﬁer auto detects optical signal presence).

IR CONTROL

Master Volume and Internal Preset recall my be remotely controlled via IR commands, using the front panel IR target

and an IR compatible remote control or control system.

 IR HEX command strings are available at StealthAcoustics.com/sa2400-mkii

Pass Filters

Setup

Input

EQ Band

EQ Switch

LPF Switch

HPF Switch

HPF/LPF

Phase

Brightness (LCD)

Utility

Auto

Analog

Opt. (optical)

Ch-1

Ch-1+2

Ch-2

Pink Noise

Factory Default

Test

Version

Band (1-11)

EQ Bypass

EQ On

Noise Level

Noise 1 Switch

Noise Gain __

Bypass

Noise 2 Switch

Bypass

Volume Max = __bB

Bright / Dim (0-3)

Ratio

Thresh

Release

Knee

Attack

Limiter Ratio = __

Limiter Thresh = __dB

Limiter Release = __ms

Limiter Softknee = __dB

Limiter Attack = __ms

Save

Load

Phase Reverse

Phase Normal

LPF

HPF

Limiter Switch

Limiter Bypass

Limiter On

Delay Delay __ ms

Pass-Through Out

Post-DSP

Pre-DSP (default)

Auto Standby

O (default)

Reset

SA2400 (ver.xx.hex)

HPF Bypass

HPF On

LPF Bypass

LPF On

Freq = __Hz

Slope = __dB

Freq = __Hz

Q = __

G =__dB

F =__Hz

Chnl 1+2

Chnl 2 (default)

Chnl 1

Chnl 1+2

Chnl 2

Chnl 1 (default)

Presets (1-10)

Chnl 1

Chnl 1+2

Chnl 2

Input Assign

Volume Max

Limiter

DSP Presets

PROGRAMMING MENU - FRONT PANEL NAVIGATION

STEALTH SIGNAL MANAGEMENT SYSTEM (SSMS) SOFTWARE

Programming of the ampliﬁers DSP section is best accomplished via a graphical user interface, using Stealth’s free

Stealth Signal Management System software (SSMS) and a USB connected Windows™ computer. The software allows

the programmer to easily see and manipulate DSP programming for either channel independently, or both channels

together, all from one screen.

 The SA2400MKII requires SSMS Version 1.0.7 or later

8 9 10 1211 13

1 3 4 5 762

Download the Stealth Signal Management System

software for powerful DSP programming tools.

StealthAcoustics.com/sa2400-mkii

1. System Settings menu: Access Pink Noise Generator and other factory settings

2. File Management Menu and Buttons: Recall and Save complete DSP setting ﬁles

3. DSP Presets Buttons: Load or Save a DSP state via one of the 10 internal ampliﬁer Presets

4. Preset Name Window: Presets can be named when saving in software

5. Resultant Graph Display: Indicates current settings of EQ and Pass Filters when EQ and Filters are turned on.

6. Channel Select Buttons: Program either CH1, CH2 independently, or CH1+CH2 together

7. Limiter Stage: Use for speaker protection from overload, or to set maximum

allowed output from ampliﬁer using threshold control

8. Channel Delay: Delays a channels signal output from 0-100 Milliseconds

9. EQ Settings Window: Indicates parameter settings for all 11 Parametric EQ’s, as set by the EQ Section controls

10. Channel Phase: Toggles signal polarity on either channel

11. EQ Section: Use arrows and sliders to select and set Frequency, Gain and Filter-

width (Q) parameters on each of the 11 per-channel EQ bands

12. Channel Volume / Balance: Controls individual channel volume levels

13. Master Volume: Adjusts master output volume of both channels. Mirrors front panel Volume Control Buttons

14. High and Low Pass Filters: Use to set frequency and select slope of Pass

Filters (for bi-ampliﬁcation, LF/HF roll-o, or subwoofer use)

SLEEP SETTING (when 12V trigger is not used)

By default, the ampliﬁer is designed to go into a low-power sleep setting after a period of no signal input. When signal

input is restored the ampliﬁer will wake for use. For this sleep setting to function the No Signal Mute switch on the back

panel must be in the ON position (factory default) AND the Auto Standby setting in the menu system must be set to

OFF (factory default).

If the ampliﬁer is not entering or exiting the sleep state properly verify the two settings above are conﬁgured to

their factory default states as noted.

12V TRIGGER - NO SIGNAL MUTE

Convenient 12V 1/8” mini TS input and output trigger jacks on the ampliﬁers rear panel connect to other 12V compatible

components (tip = +12V / sleeve = ground). When +12V is present at the tip of the input jack, the ampliﬁer will become

active. When the ampliﬁer is active +12V is present on the tip of the output jack, which may be used to activate other

12V trigger-compatible components.

Alternately, the ampliﬁer may be set to a “No Signal Auto-Mute” function via the rear panel switch, which turns the

main ampliﬁer o after a few minutes if no signal is present at the inputs. When in the “Auto” position, the ampliﬁer will

immediately come to life in response to any input signal. When the switch is set to “On”, the ampliﬁer remains active,

even if no signal is present.

12V TRIGGER INITIATION

In some installations utilizing the ampliﬁers 12V trigger input, a one-time initiation procedure may be required.

Before performing this procedure, ensure that you have a properly conﬁgured switched 12V source connected to the

ampliﬁer. Some devices provide voltages other than 12V and other devices require the trigger voltage output to be

turned on or conﬁgured. Please consult the documentation for your trigger source device.

Use the included MONO 1/8” mini TS cable for 12v trigger connections. A STEREO 1/8” mini TRS cable will not work.

It is always a good practice to use a volt meter to verify proper voltage and switching at the plug connected to the

ampliﬁers 12V jack.

If the ampliﬁer does not immediately respond to a 12V trigger voltage connected to the ampliﬁer, please take the

following actions:

1. Turn the ampliﬁer on by pressing the front panel power button. Wait until the

front panel display shows SA-2400 MKII after the volume ramps up.

2. Apply a standard 12V trigger voltage to the “Trigger In” jack on the rear panel of the ampliﬁer.

3. Remove the 12V trigger voltage by turning o the source of the 12 volt feed.

4. Re-activate the 12V volt trigger. This will turn the ampliﬁer on.

5. From this point the ampliﬁer will respond to the 12V trigger state.

Note: When the ampliﬁer is turned o with 12V triggering, the red light on the front of the unit will light up when the

ampliﬁer is o.

SPECIFICATIONS*

Power Output (per channel – both channels driven)

 310 watts @ 8Ω< 0.05 THD

 450 watts @ 4Ω< 0.05 THD

Frequency Response

 20Hz-50kHz (+1/-3dB)

Total Harmonic Distortion

 < 0.05 @ 460 watt @4Ω/ 1 kHz

Signal to Noise Ratio

 >105 dB / A weighting 20Hz-20kHz

Analog Input Sensitivity

 -1dBV for output of 312.5W / 8Ω

Maximum Voltage Gain

 36 dB / 8Ω

Crosstalk

 >85dB

System Impedance

 8ΩNominal – 4ΩMinimum

Maximum Full Output Current Draw

 1080 watts @115V / 8Ω

(100Hz sine wave – both channels driven)

 1560 watts @115V / 4Ω

(100Hz sine wave – both channels driven)

Average Output Current Draw

 1/8 Audio Power = 135W (1.17A) average @ 115V / 8Ω

(normal audio program)

 1/4 Audio Power = 270W (2.34A) average @ 115V / 8Ω

(heavy bass program / subwoofers)

 1/8 Audio Power = 195W (1.69A) average @ 115V / 4Ω

(normal audio program)

 1/4 Audio Power = 390W (3.39A) average @ 115V / 4Ω

(heavy bass program / subwoofers)

Heat Dissipation

 849 BTU/Hr

Ampliﬁer / Load Protection

 Full short circuit, open circuit, thermal,

ultrasonic and RF protection

 On/O muting with auto volume

ramp up on power-up

 DC fault power supply shutdown

Fixed high-pass ﬁlter @18Hz

Stable into reactive or mismatched loads

Dimensions

 Width: 19” (483 mm) (rack ears installed)

 Width: 17” (432 mm) (rack ears removed)

 Height: 3.5” (89 mm)

 Depth: 15.75” (400 mm)

Rack Mountable

 (2) RU spaces: 3-1/2” (89mm)

 Removable rack ears

Shipping Weight

 38 lbs. (17.2 kg)

*All speciﬁcations subject to change.

StealthAcoustics.com

T 888.865.6800 | F 360.424.8872

A Division of Dimensional Communications, Inc.

1220 Anderson Road | Mount Vernon, WA 98274

For technical support

contact your local dealer or:

Email: Stealth@StealthAcoustics.com

Tel: +1 360 848 6800

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