THEORY DLC-250.4 Installation And Programming Manual Download

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DLC-250.4 LOUDSPEAKER CONTROLLER

Introduction and Overview

2.4 Firmware

This manual describes the features, functions and user interface of THEORY
DLC amplifiers running

Firmware Version 1.2.0.

It is strongly recommended that the firmware version
installed in the amplifier in use is checked initially, and
regularly thereafter. If updated firmware is available,
the amplifier should be updated as a priority.

The firmware installed in the amplifier can be identified and updated by
selecting the

Device

option in the Control web app

Settings Menu

Firmware versions can be checked, and firmware downloaded, from the
THEORY DLC website: www.theoryaudiodesign.com.

3. Carton Contents

THEORY DLC

amplifiers are shipped in a cardboard carton containing the

amplifier unit, a mains cable appropriate for the sales territory, an accessory
pack, and a document pack. The full contents is listed below.

• Amplifier unit
• Mains power cable
• Input connector x 2
• GPIO socket connector
• Output connector x 2
• Adhesive rubber feet x 4
• Document pack

Summary of Contents for DLC-250.4

Page 1: ...DLC 250 4 LOUDSPEAKER CONTROLLER 1 DLC 250 4 AMPLIFIED LOUDSPEAKER CONTROLLER INSTALLATION AND PROGRAMMING GUIDE Rev A 220610 ...

Page 2: ... an appropriate level of performance and in good operating condition Any damage to or unsatisfactory performance from these amplifiers caused by inadequate or failed input or output ancillaries may invalidate support warranty or guarantees of performance 6 These amplifiers are intended to be installed and operated indoor in a controlled environment pollution degree PD2 within an ambient temperatur...

Page 3: ...lked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus 14 Do not unplug the unit by pulling on the cord use the plug 15 Only use attachments accessories specified by the manufacturer 16 Unplug this apparatus during lightning storms or when unused for long periods of time 17 Refer all servicing to qualified service personnel Servicing is re...

Page 4: ...tely as required between pairs of outputs in Lo Z mode THEORY DLC amplifier model output channel counts and power outputs are as follows DLC 250 4 Mode Channels Max Rated Output per Channel Lo Z Four 125 Watts Hi Z Two 250 Watts 2 1 Connections THEORY DLC signal input and output connections are accomplished via RCA Phono and Euroblock style connectors A GPIO General Purpose In Out Euroblock connec...

Page 5: ...he firmware installed in the amplifier can be identified and updated by selecting the Device option in the Control web app Settings Menu Firmware versions can be checked and firmware downloaded from the THEORY DLC website www theoryaudiodesign com 3 Carton Contents THEORY DLC amplifiers are shipped in a cardboard carton containing the amplifier unit a mains cable appropriate for the sales territor...

Page 6: ...LC 250 4 LOUDSPEAKER CONTROLLER 6 Overview Diagram 1 THEORY DLC four channel amplifier dimensions Shaded area defines ventilation space 44 mm 1 7 in 220 mm 8 7 in 80 mm 3 1 in 319 mm 12 6 in 25 mm 1 0 in ...

Page 7: ...ed along at least one side of the amplifier at all times Ventilation apertures are also located on the rear panel of the amplifier and must not be obstructed It is important to retain at least 80 mm 3 1 in free space for airflow behind the amplifier rear panel In addition to rack mount ears optional rack mount rear support hardware is available and can be attached to the amplifier Rear support har...

Page 8: ...ll mounted using connecting plate hardware The adhesive rubber feet should also be used in these circumstances to minimise the possibility of vibration between the amplifier and mounting surface Wall and desk mounting is illustrated in Diagrams 4a and 4b It is important in any free standing installation that airflow through the amplifier s side panel mounted fans and rear panel ventilation apertur...

Page 9: ...3 The THEORY DLC amplifier default LAN IP address is 192 168 64 100 Configure the laptop or desktop computer for a fixed IP address in the same IP range eg 192 168 64 10 with Subnet mask of 255 255 255 0 or prefix 24 and set the Gateway to 192 168 64 1 4 Open a laptop or desktop web browser and enter the address http 192 168 64 100 The THEORY DLC Control Web App interface will open to enable ampli...

Page 10: ... or stereo Select input sensitivity option Adjust input gain Adjust zone volume Adjust zone volume Note When adjusting input gain the input level display should remain green If it displays red the input gain should be reduced 5 3 Configuration Menus Opening a web browser that is network connected to a THEORY DLC amplifier initially displays the THEORY DLC Control Web App Dashboard illustrated in D...

Page 11: ... is selected by highlighting one of the output identifiers 1 2 3 or 4 at the top of the display The Output Tab also enables Speaker Preset configurations to be created exported imported or cleared Diagram 5d illustrates the Output Tab Note The number of individual outputs available for configuration will depend on the THEORY DLC amplifier model and the input zone and output mode configuration The ...

Page 12: ...s for use with specific speakers can be imported and applied to amplifier outputs To import speaker preset parameters follow the steps described below and illustrated in the diagrams 1 Select either the IMPORT PRESET FROM FILE or SELECT PRESET FROM LIBRARY option from the Speaker Preset menu If no import option is visible select CLEAR to delete any existing speaker preset data Note The SELECT PRES...

Page 13: ...ifier outputs The FIR preset menu enables FIR Finite Impulse Response based equalization filter coefficients generated by external speaker measurement software to be imported and applied to individual amplifier outputs Note FIR coefficient files in either csv or txt format can be imported The Driver Alignment preset menu enables delay to be applied to individual amplifier outputs The Polarity pres...

Page 14: ...se the frequency setting one step at a time until the distortion is no longer audible 5 3 5 Settings Tab The Settings Tab enables miscellaneous amplifier settings to be configured and installation data to be recorded The Settings Tab provides access to further sub menus Diagram 5i illustrates the Settings Tab The System Information menu provides text fields for the recording of installation data T...

Page 15: ...offer considerable versatility in terms of sources signal routing installation zones and output modes Inputs can be freely assigned to installation zones and those zones assigned freely to the available amplifier outputs in either Lo Z or Hi Z modes This versatility enables for example one amplifier simultaneously to drive both Lo Z and Hi Z speakers or for different inputs to be routed to differe...

Page 16: ...ut amplifier can have the following zone configurations 1 x stereo Lo Z zone 2 x mono Lo Z zones 1 x mono Hi Z zone A four output amplifier can have the following zones configured 2 x stereo Lo Z zones 4 x mono Lo Z zones 2 x mono Hi Z zone 1 x mono Hi Z zone 1 x stereo Lo Z zone 1 x mono Hi Z zone 2 x mono Lo Z zones Note When configured in Hi Z mode THEORY DLC amplifiers operate in bridged mode ...

Page 17: ...vely Note The GPIO connector must not be used for any unintended purpose Amplifier damage may result from incorrect use of GPIO Note Shielded cable must be used when connecting standby switches and potentiometers via GPIO Note GPIO Pin 8 has a low output impedance and is able to supply a maximum current of 10mA Note GPIO Pin 1 and Pin 3 both offer ground connections Pin 1 is connected directly to ...

Page 18: ...THEORY DLC rear panel connections Note Two output amplifier model connection sockets differ only in the deletion of channel 3 and channel 4 output connectors Balanced input connections to the amplifiers are made via male Euro Block connectors Connecting cables to the supplied female input connectors is illustrated in Diagram 6b Unbalanced input connections to the amplifiers are made via RCA phono ...

Page 19: ...nected to the supplied GPIO connector Connecting cables to the GPIO connector is illustrated in Diagrams 6d 6 6 Network Connections THEORY DLC amplifiers are TCP IP network connected devices that are configured via a web page based interface Wired Ethernet and wireless WiFi connection options are available Connecting THEORY DLC amplifiers to a TCP IP network is described in Section 5 of this manua...

Page 20: ...onnections The exclamation point printed next to the output terminals of the amplifiers is in addition to the CLASS 2 WIRING text intended to alert users to the risk of hazardous voltages Output connectors that could pose a risk are marked with the exclamation point Do not touch the output terminals while the amplifier is switched on Make all connections with the amplifier switched off ...

Page 21: ...n one or more inputs Output Off No output signal present Green Signal present on one or more outputs Amber Signal limiting clipping on one or more outputs Red One or more channel pair is in overload protection mode Network Off No Ethernet network detected Green Ethernet network detected WiFi Off WiFi disabled Green WiFi enabled 7 2 Automatic Power Sharing THEORY DLC amplifiers incorporate a power ...

Page 22: ...6dB A weighted 20Hz 20kHz 8Ω load THD N typical 0 05 20Hz 20kHz 8Ω load 3dB below rated power Frequency Response 20Hz 20kHz 0 0 25dB 8Ω load 3dB below rated power Protection Circuits Short circuit DC Undervoltage Temperature and Overload protection Power Supply UREC universal mains switch mode power supply with Power Factor Correction PFC and standby converter Operating temperature 0 40 C Operatin...

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