TacT Audio M2150 User manual

Owner’s Manual
M2150 / S2150
True Digital Amplifier

Blank Page

3Tact Audio
WARNING
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO
NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION
RISK OF ELECTRIC
SHOCK DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK,
DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS
INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
The exclamation point within an equilateral triangle is intended to alert
the user to the presence of important operating and maintenance (ser-
vicing) instructions in the literature accompanying the product.
The lightning with arrowhead symbol within an equilateral triangle is
intended to alert the user to the presence of “Dangerous Voltage”
within the product’s enclosure that maybe of sufficient magnitude to
constitute a risk of electrical shock to a person.

CAUTIONCAUTION
4Tact Audio
1. Read these instructions entirely before installing or operating this equipment.
2. Keep these instructions.
3. Heed all warnings.
4. Do not use this equipment near water or allow it to become wet.
5. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
6. Do not install near any heat sources such as radiators, heat registers, stoves, or
other appliances (including amplifiers) that produce heat,; doing so may
damage the unit and present a fire hazard.
7. Do not defeat the safety purpose of the polarized or grounding-type plug. A
polarized plug has two blades with one wider than the other. If the provided plug
does not fit into your outlet, consult an electrician for replacement of the outlet to
one that is polarized.To protect against electrical shock, match the wide blade
of the polarized plug to the wide slot in the outlet and fully insert the plug.
8. Protect the power cord from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where they exit the equipment. Do not
use this unit with a damaged cord or plug.
9. Only use attachments/accessories specified by the manufacturer.
10. Unplug this equipment during lightning storms or when unused for long periods of
time.
11. Refer all servicing to qualified service personnel.
1. Always unplug the unit from the electrical outlet before cleaning.
2. Do not use abrasive cleaners. Simply wipe the exterior with a clean soft cloth.A
small amount of nonabrasive cleaner may be used on the cloth to remove
excessive dirt or fingerprints.
The >note< symbol indicates information very useful or essential to daily
operation.
Important Safety
Instructions
Cleaning and
Maintenance
“Note” symbol

5Tact Audio
IMPORTANT! Please recordyour serialnumber herefor futurereference.Youwill needthis for
futureupgrades orshouldyou everrequire serviceonyour M/S2150.
M/S 2150 serial number: _____________________
Optional modules installed:
ADCanalog input :__
Registration
©2003TactAudioCorporation.Allrightsreserved.
No part of this document may be reproduced or transmitted in any form or by any
means,electronic, mechanical,photocopying orother wise, withoutthe prior
writtenconsent oftheTactAudioCorporation.
The information contained in this document is subject to change without
notice.
Acknowledgments

CAUTIONCAUTION
6Tact Audio
Table of contents
Safetyinstructions 4
Acknowledgments/Registration 5
Unpacking the m/s 2150 7
Introduction 8
M/S 2150 Connections 9
Front Panel Controls 15
Remote Control 16
Front Panel Display 18
Mainscreen 18
MAINmenu 18
SavingMenu Settings 18
DELAYmenu 19
LEVELmenu 19
ADCmenu 20
CROmenu 20
TRIGmenu 21
DISPLmenu 21
OPTmenu 22
InOutmenu 23
POLmenu 23
REMmenu 24
COMMmenu 24
ADDRmenu 25
LOCKmenu 25
GAINmenu 26
TacT M/S2150 Software 27
Connectyour M/S2150
toyour Computer 28
Specification 29

7Tact Audio
Unpacking the M/S 2150
Carefully remove the M/S2150 and accessory kit from the carton and check for
shipping damage. Contact both the shipper and TacTAudio immediately if the unit
shows any sign of damage from rough handling.All TacTAudio equipment is carefully
inspected before leaving our factory.
KEEP SHIPPING CARTON AND PACKING MATERIALS for future use or in the
unlikely event that the unit needs servicing. If this unit is shipped without the original
packing, damage could occur and void the warranty.
You should find the following items in the accessory kit:
- oneAC mains cord
-RJ11 datacable
-RJ11-to-RS232adapter
-15’ RS232cable
-CD-romwith software
-remote control
- 2AAAbatteries
-one manual
The2150 amplifierisconfiguredfor either110or 220/240voltoperation.The operat-
ing voltage is clearly marked on the outside of the box and also on the rear panel
beneaththeAC mainsconnector.
BEFORECONNECTING THE POWER,MAKESURE THAT THELABELINDICAT-
ING THE VOLTAGE MATCHES THE VOLTAGE FOR YOUR COUNTRY
The2150 hasthreeoperating modes:
- OFF AC mains power is cut off, either via the front
panelmains switch,or byunplugging theamplifier from
the wall outlet.
-STANDBY The unit is powered but all outputs are muted and the
displayis off. Theamplifier usesvery littlecurrent and
is“idling” or“sleeping”. Use theremote “STANDBY”
buttonto toggle betweenONand STANDBY.
- ON Everythingis poweredand readyto use.
Accessories
Operating voltage

CAUTIONCAUTION
8Tact Audio
Introduction
-Ultra highprecisionDA conversion
-Upsampling to384,000Hz beforeconversion
- Full resolution at -30 dB
-Software upgradeableDSPsection
-DSP-based 48bit internal electroniccrossover (inbi-ampedmode)
-192kHz/24bitADconverter
-Digital pre-amplificationwith 24-bitresolution ata playbacklevel of -39dB!
- Output of 2x300W into 4 Ohm load, with extreme load tolerance
- NO feedback or feedforward locally or globally is utilized in the signal path
The digital input is taken to the central processor where it is reformatted into a
pulse width modulated signal of extreme precision. The pulse rate is measured at
precisely 384,000 pulses per second. Each pulse can have 256 different widths,
with the narrowest pulse being a mere 10 nanoseconds wide. The clock frequency
therefore is 98 MHz. The central processor uses proprietary patented algorithms
(Equibit) to arrive at exactly the right combination of pulse widths produce a highly
accurate waveform. This is the most fundamental departure from conventional am-
plifiers. TacT defines the waveform mathematically - we are not trying to follow or
emulate a waveform by using feedback or feed-forward.
Once the decision of the duration of the pulse is made the central processor con-
trols FET-switches at the output with extreme precision. Voltage and current are
drawn from the power supply and fed to the speakers.
The level of playback is controlled by adjusting the voltage of the power supply.As
this voltage is switched directly to the speakers, it is of paramount importance that
the power supply be totally free of ripple and noise. ForTacTdigital amplifiers, a
switch mode power supply of extreme precision with ripple rejection of more than
135 dB has been developed.At full volume (voltage) the TacT M/S2150 delivers 58
volts, equivalent to 150 Watts into 8 ohms.To reduce the volume the voltage of the
power supply is reduced. This means that the volume control is no longer part of an
active circuit.
How does it work?
Why hasn’t anybody
thought of it before? Why has this not been done before? - Well, try to switch 58 volts DC 384,000
times per second without creating even a whisper of noise at a distance of 1" from
the tweeter! Only in the past few years has it been possible to create a fully digital
“amplifier”.
Congratulationsonyour purchaseofyourM/S2150.Youhavenow acquiredthemost
advancedstereoamplifiereverdeveloped!
Features:

9Tact Audio
M/S 2150 Connections
Digital input The2150 amplifierhas 5digital inputs:
-three RCA(S/PDIF) (D1, D2,D3)
-oneAES/EBU(XLR) (D4)
-oneTosLink(S/PDIF) (D5)
All of the digital inputs support PCM audio data with sampling rates from 32kHz to
96kHz/16-24 bits,however, theAES/EBU and RCA/coaxial inputs support up to
192kHz.
The 2150 amplifier has 3 stereo analog inputs whith the optional ADC module in-
stalled:
-two analogstereo singleended (RCA)(A1,A2)
-oneanalog stereobalanced(XLR) (A3)
NOTE: A/D conversion is always performed at 24-bits/192kHz.
Analog input
(optional ADC module)
Digital Input Section
Analog Input Section
NOTE: The optional ADC module is required for analog inputs.

CAUTIONCAUTION
10 Tact Audio
M/S 2150 Connections
Digital output The2150 amplifierhasadigitalpassthrough.The digitalinputsignal ispassedto the
digital output without processing or volume control. The sampling rate is the native
samplingfrequency ofthe input.
Digital Output
NOTE: that this output is not active when analog input is selected.
RS-232 interface
ports TheM/S 2150has twoRS232 interfaceports:
-INPUT
-AUX
Usethe “INPUT”portfor communicationwith yourTactmaster controllerorPersonal
Computer.
Use the “AUX”port to connect to TacT digital amplifiers.RS-232 Interface Ports

11Tact Audio
AC mains input Connect the M/S 2150 to theAC mains wall socket.
CAUTION:Use the supplied IECmainscable, or a 3-pronggroundedcableonly.
Digital Output
Speaker output
(normal operation) The 2150amplifierhas onepairof highquality WBTspeakerterminals. Thesetermi- nals will accept both spade- and banana-plugs. When connecting your speakers,
pleasemake surethat theRED/HOT terminalis connectedto yourspeakers’ POSI-
TIVEterminal andtheBLACK/COLD terminalisconnected toyourspeakers’NEGA-
TIVEterminal.
RIGHT
SPEAKER LEFT
SPEAKER
+ - + -
TheM/S 2150has a trigger “IN”and “OUT”toprovide onand standbycontrol
froma triggerdevice andto passthe triggersignal toanother device.
Trigger outputs
Trigger Connectors
M/S 2150 Connections

CAUTIONCAUTION
12 Tact Audio
LOW
HIGH
RIGHT
SPEAKER LEFT
SPEAKER
+ -
LOW
+ -
+ -
HIGH
+ -
Speaker output
(Biamped operation) If you are using two or more 2150 amplifiers, and your speakers allow for multi- amping,you canconfigurethesystem torunin biampedoreven tri-ampedmodeetc.
This type of setup allows for one amplifier channel to drive a specific driver or fre-
quency region. The most commonly used setup is biamped (two channels to each
speaker:highandlow). Thefollowingaretwoexamples ofmakingabiampedconnec-
tion:
LOW
HIGH HIGH
LOW
Horizontal Biamping LEFT
SPEAKER RIGHT SPEAKER
M/S 2150 Connections

13Tact Audio
LOW
HIGH
+ -
LOW
+ -
+ -
HIGH
+ -
RIGHT
SPEAKER LEFT
SPEAKER
Vertical Biamping
HIGH
LOW
LOW
HIGH
LEFT
SPEAKER RIGHT
SPEAKER
M/S 2150 Connections

CAUTIONCAUTION
14 Tact Audio
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Biamping - continued When two or more 2150 amplifiers are configured in a bi-/tri-amped setup, both the
signaland theRS232TacTSystemBus mustbe daisychained betweenthe amplifi-
ers.
Thesame signalflow isapplicablefor bothhorizontal andvertical bi-amping.
FromRCS2.0S, RCS2.2Xor
TCSmkII*Optional
From source
AMP-1
AMP-2
AMP-3 - ONLY PRESENT IN TRI-AMPED SETUP
RS232
RS232
RS232
Digital signal
(coax/SPDIF)
Digital signal
(coax/SPDIF)
Digital signal
(coax/SPDIF)
M/S 2150 Connections
With its advanced DSP control, the M/S 2150 can enable digital crossovers
(high-andlow-pass) makingit ispossible toconfigure the2150 amplifiersto
virtually any system.
Examples of how a TacT active system can be configured:
1)Active two-way. The M2150 operates as master amp (control unit) and the
S2150operates asslave amp.M2150 hasa DSP-basedhigh-passfilter and
drivesthe high-sectionof the2-way loudspeaker.S2150 hasa low-pass filterand
drivesthe bass-section.
2) Active three-way. The Tact RCS operates as master pre-amp and the three
S2150operates asslave amps.The topS2150 hasaDSP-controlled high-pass
filterand drivesthe tweetersection. Themiddle S2150has a High-and low-pass
filterand drivesthe midrangesection. Thebottom S2150has alow-pass filter
and drives the bass section.
M2150& S2150
Configurations

15Tact Audio
Front Panel Controls
ON/OFF Usethe “ON/OFF”switch totoggle betweenON andOFF operation.
(Standby mode can be only selected only through the remote control)
Master volume Themaster volumeis controlledby turningthe largevolume wheel.Thegreen num-
bers on the left side of the wheel will change as you turn the wheel - this is your
master volume level indicator. (The wheel sensitivity, maximum volume and other
settingscan be foundin the“OPT” menu.)
Mute Usethe “MUTE”buttonto muteorun-mute duringplayback.The masterlevelindica-
tor will switch to “--” in Mute mode. You can still adjust the master volume while the
unit is in Mute mode - the master level indicator will briefly indicate the level, then
switch back to “--” mute indicator
Digital
input selector
Analog
input selector
Press the “DIGITAL” button to select the digital input. This is a toggle switch, and
pressingit multipletimeswill togglethroughall ofthe fivedigitalinputs. The selected
input will be displayed in the input display portion of the display screen.
Pressthe “ANALOG”buttonto selecttheANALOGinput.Thisis atoggle switch,and
pressing it multiple times will toggle through all of the three analog inputs. The
selected input will be displayed in the input display portion of the display screen.
NOTE: The optional ADC module is required for analog inputs.
The front panel controls on the 2150 amplifier will allow you to control all of the
amplifiersmain features. Allsecondary optionsare controlledwith menususing the
remote control or the supplied software. The exclusive “TacT wheel” is the master
volumecontrol. (Thewheelis onlyavailable ontheM2150)
ON/OFF Switch
MuteMaster VolumeDigital Input Selector
Display
Analog Input Selector
Input Display Volume Level

CAUTIONCAUTION
16 Tact Audio
The remote control is used to access the front panel display controls and menus.
Remote Control
4
11
2
9
1
3
5
6
7
10
8
12

17Tact Audio
1- STANDBY
The STANDBY button will turn the M/S 2150 “ON” or it will place it into “STANDBY”
mode. When in standby mode, the unit is placed into a low power “idiling” state.
The standby button is also used to save changes that were made in the menu
editing parameters. By placing the unit into standby the current settings are
saved.
2 - DIGITAL
TheDIGITALbuttonwill scrollsequentially,allowing the selectionof oneof the5
digital inputs.
3- ANALOG
TheANALOG button will scroll sequentially, allowing the selection of one of the 3
analoginputs.
4- CORRECTION block
TheCORRECTION blockbuttons areinactivewith thisunit.
5 - MENU
The MENU button will switch the front panel display from the status screen to the
mainmenu screen.
6. VIDEO
The VIDEO button is inactive with this unit.
7. UP
TheUP navigationalbutton isused toselect menuoptions and/orchange their
values.
8. DOWN
TheDOWN navigationalbutton isused toselect menuoptions and/orchange their
values.
9. LEFT
TheLEFT navigationalbutton isused toselect menuoptions and/orchange their
values.
10. RIGHT
TheRIGHT navigationalbutton isusedto selectmenu optionsand/or changetheir
values.
11.ENTER
The ENTER button will select the menu option currently marked by the blinking
cursor or is used to enter an edited parameter.
12. VOLUME Block
The VOLUME block consists of three buttons.
The“MUTE” buttonwillmute/un-mute allenabled channels.
The“UP”button willincreasethe mastervolume level
The“DOWN”button willdecreasethe mastervolumelevel.
Remote Control

CAUTIONCAUTION
18 Tact Audio
Front Panel Display
Main screen Whenthe 2150amplifieris turnedON andthesystem loadingsequence hascom-
pleted, the amplifier will display the normal operating main screen.
INPUT: CD/Transport
-17.9 dB Fs= 44.1
3
2
1
1 - Name for input selection
2 - Master level in dB
3 - Input sampling frequency indicator.
Main Screen :
The Main menu of the M/S 2150 has three pages of general menu selections.
<- OPT InOut POL
REM COMM ADDR ->
MAIN menu
<- LOCK GAIN
DELAY LEVEL ADC
CRO TRIG DISPL->
Saving Menu
Settings Custom settings that are made to any of the menu selections may be saved by
placing the M/S 2150 into standby mode. If you make changes to any of the menu
items and turn the unit off before placing it into standby mode all settings will be lost.
To place the M/S 2150 into standby mode press the red “STANDBY” button on the
remote control.
Main Menu :
The remote control is needed to enter the amplifiers Menu selection pages. Press
the “MENU” button to enter the amplifiers menu section. Use the “LEFT” and
“RIGHT” navigational buttons to highlight an option with the selection cursor and to
proceed to a new page.To enter a highlighted option press the “ENTER” button.
Once you are in a menu option Use the “MENU” button to go back one step (from
sub-menus) or to return to the main operating screen.

19Tact Audio
.
The Delay menu controls the system’s time alignment. The system’s time align-
ment can be adjusted by changing the delay time for the left and right outputs inde-
pendently.
DELAYmenu
LEFT RIGHT
0.00 0.00 msec
1
1 - Left and Right channel independent delay time settings.
Delay Menu :
LEVEL menu
LEFT RIGHT
0.0 0.0 dB
1
The Level menu controls channel balancing. You can adjust the system’s bal-
ance by changing the attenuation for the left and right output signals indepen-
dently.
1 - Independent Left and Right channel level settings.
Level Menu :
Use the “LEFT” and “RIGHT” navigational buttons to highlight an option and use the
“UP” and “Down” buttons to change its value .
Use the “LEFT” and “RIGHT” navigational buttons to highlight an option and use the
“UP” and “Down” buttons to change its value .
Front Panel Display

CAUTIONCAUTION
20 Tact Audio
Front Panel Display
CRO menu The M/S 2150 can apply user selectable crossovers to the outputs. The default
setting is set to “OFF” with no crossovers applied. For your convenience there are a
total of 10 default crossover selections pre-loaded for use with most biamped
systems. If a different crossover is desired, there are other options using the P.C.
software included with the unit.
Use the “UP” and “DOWN” navigational buttons to scroll through the available options
and press the “ENTER” button to activate the currently displayed selection. To select
an analog Input (2) use the “ANALOG” selector button found on the M/S 2150 front
panel or on the remote control to scroll to the input you would like to edit.
ADC menu
(ADC module optional)
GAIN: LOW IN:2
LOW HIGH
1
1 - Assignable gain values.
2 - Input channel currently selected.
3 - Active gain setting for selected input channel.
The M/S 2150 may be equipped with an optional state of the art Analog to Digital
Converter. To further enhance the converter’s performance, the system offers two
selectable gain values for theADC input stage.These two values may be assigned to
each input independently.
ADC Menu : 3
LOW = -6.0dB in reference to 0.0dB. Input sensitivity: 2.2 volt
HIGH = 0.0dB in reference to 0.0dB. Input sensitivity: 4.4 volt
CRO : L65, H65, 10
4: L65, H65, 10 *
1
1 - Crossover selections.
2 - Active Crossover selection.
3 - Active Crossover selection.
CRO Menu : 3
2
Use the “UP” and “DOWN” navigational buttons to scroll through the available
options and press the “ENTER” button to activate the currently displayed
selection.
Example : Option #4 - 10th order lowpass @ 65Hz + 10 highpass @ 65Hz
(See the “InOut” menu for more information about output settings used with
crossover configuration)
2