Dynacord PCA 2450 User's Manual
Contents
1. FiDYNACORD a EEE ieee E a AS IA E IEAA E S SPECIFICATIONS Conditions 1 0 dBu 0 775 V rms 2 Dual mode ratings are for each channel both operating unless noted 3 120 volt ac line voltage maintained throughout testing Continuous Rated Output Power 20 20 000 Hz at lt 1 THD both channels driven per EIA RS 490 Dual Mode 4 Ohms 440 watts Bridged Mode 8 Ohms 920 watts Dual Mode 8 Ohms 320 watts Continuous Rated Output Power 1 kHz 1 THD both channels driven per EIA RS 490 Dual Mode 4 Ohms 520 watts Bridged Mode 8 Ohms 1040 watts Dual Mode 8 Ohms 360 watts Dynamic Headroom reference 1 kHz THD 1 Dual Mode 4 Ohms 0 97 dB Bridged Mode 8 Ohms 0 97 dB Dual Mode 8 Ohms 1 52 dB Power Bandwidth 0 1 dB reference 1 kHz Dual Mode 4 Ohms lt 10 Hz 30 kHz at 400 watts Bridged Mode 8 Ohms lt 10 Hz 30 kHz at 800 watts Dual Mode 8 Ohms lt 10 Hz 37 kHz at 250 watts See Frequency Response 3 dB reference 1 kHz 1 watt 3 5 70 000 Hz Voltage Gain reference 1 kHz Dual Mode 35 2 dB Bridged Mode 41 2 dB Input Sensitivity reference 1 kHz Dual Mode for 400 Watts into 4 Ohms 650 mV Bridged Mode for 800 Watts into 8 Ohms 650 mV Dual Mode for 250 Watts Into 8 Ohms 775 mV Maximum Input Level reference 1 kHz 28 dBu 19 5 V rms Input Impedance per channel 20 20 000 Hz Balanced 20 kilohms Unbalanced 10 kilohms Phase Response at rated po2. ac voltage and dc Rear mounted controls shall include two position switches for the stereo or dual monophonic mode inputs paralleled stereo or bridged mono output and chassis ground lift Rear mounted connectors shall include XLR type balanced inputs and signal outputs 1 4 inch unbalanced inputs and four pole Neutrik Speakon output connectors for left right and bridged outputs Front mounted controls shall inciude individual input level controls for each channel and a power on off switch Front mounted indicators shall include five segment LED ladders for both input and output levels for each channel processor on processor active Thermal Brain Circuit TBC active and ste reo mono and BTL LED s for each channel The power amplifier shall meet the following performance criteria maximum input voltage 28 dBu 19 5 V rms input voltage for 400 watts into 4 ohms or 800 watts into 8 ohms mono bridged 650 mV for 250 watts into 8 ohms 775 mV continuous rated output power from 20 Hz to 20 kHz at less than 1 THD 440 watts per channel into 4 ohms 320 waits per channel into 8 ohms 920 watts mono bridged into 8 ohms frequency response at 1 watt 3 5 70 000 Hz 3 dB voltage gain 35 2 dB in dual mode and 41 2 dB in bridged mode hum and noise at least 101 dB A weighted below continous rated output power damping factor at 1 KHz in dual mode greater than 300 tran sient intermodulation distortion DIM 100 in dual
3. Lithoin U S A EESE SEARS EGEE SEE ESE eee ASEN RES aE RMN ee EES ON SS eae cee oe mere owner s manual c malfunction resulting from use or operation of the product other than as specified in the product data sheet or owner s manual d malfunction resulting from misuse or abuse of the product or e malfunction occurring at any time after repairs have been made to the product by anyone other than Electro Voice or any of its authorized service representatives Obtaining Warranty Service To obtain warranty service a customer must deliver the product prepaid to Electro Voice or any of its authorized service representatives together with proof of purchase of the productin the form of a bill of sale or receipted invoice A list of authorized service representatives is available from Electro Voice at 600 Cecil Street Buchanan MI 49107 616 695 6831 or 800 234 6831 and or Electro Voice West at 8234 Doe Avenue Visalia CA 93291 209 651 7777 or 800 825 1242 Incidental and Consequential Damages Excluded Product repair or replacement and return to the cus tomer are the only remedies provided to the customer Electro Voice shall not be liable for any incidental or consequential damages in cluding without limitation injury to persons or property or loss of use Some states do not allow the exclusion or limitation of incidental or consequential damages so the above limitation or exclusion may not apply to you Other Rights This
4. mode into 8 ohms less than 0 01 intermodulation distortion SMPTE 60 Hz 7 kHz in dual mode into 8 ohms less than 0 02 typical crosstalk greater than 75 dB below rated output power Enclosure rack mounted chassis with han dies 16 gauge steel bottom sides 1 in 16 mm aluminum top back Dimensions 9 5 cm x 48 3cmx 42 1 cm 3 74in x 19 0in x 16 6 in HWD Net weight 16 5 kg 36 3 Ib The power amplifier shall be the EV Dynacord PCA 2450 WARRANTY Limited Electro Voice products are guaranteed against malfunction due to defects in materials or work manship for a specified period as noted in the individual product line statement s below orin the individual product data sheet or owner s manual beginning with the date of original purchase if such malfunction occurs during the specified period the product will be repaired or replaced at our option without charge The product will be returned to the customer pre paid Exclusions and Limitations The Limited Warranty does not apply to a exterior finish or appearance b certain specific items described in the individual product line statement s be low or in the individual product data sheet or Recor ines SSA DAA Bustier EESTI EEEE ca ARSS T ELECTRO VOICE a MARK N compen 6b Di CociStvet ANE AAO 07 MANUFACTURING PLANTS AT E BUCHANAN MI NEWPORT TN SEVIERVILLE TN E OKLAHOMA CITY OK amp GANANOQUE ONT Electro Voice Inc 1993 M
5. EE EEEE EEEE EE En EL OR oa ODD ESS oDS ES aaa TREES Ra aA ASSES FIGURE 4 PCA 2450 Front and Rear Panels ate ais Ot A HUI LEVEL S A gt C t m DYNACORD ROYNACORD PCA rere 5a j WOE N Enr TOY AC GOH See 2 2 Be es eee Mods ERMC LOCI Eh S44 hi att bi ntmet atatatat tat aat DARRAI ALENT ES detela ea d Ai h A AA DARA A DD RA A A AA A AA A A A A A A AARAA soi A o aa naeran eaea A aaa aaa A ae NAA E AAT ASTE transformer gives the amplifier impressive cur rent output and headroom The PCA 2450 contains special processing circuits designed to augment the amplifier s performance The first of these processing circuits called Dynamic Signal Processing DSP is a low pass network with second order shelving equal ization that helps linearize the phase and fre quency response of low frequency loudspeak ers The DSP circuit works in the frequency range where the speaker needs assistance in accurately following the input signal The cor ner frequencies of the low pass network can be internally optimized via a two position switch on each channel for typical wide range profes sional speaker systems or studio monitors and large bass horns The PCA 2450 also has Audio Processor Control APC The APC circuit is a very fast audio processor that continuously monitors the internal and external operating conditions of the amplifier and controls the input level of the amplifier to ensure that the amplifier wi
6. e Load Protection Startup shutdown transients de fault infrasonic signals low ac line voltage nonlinear signal limiter voice coil thermal overload Output Topology True complementary symmetry Output Type Dual Mode Unbalanced each channel Bridged Mode Balanced FIGURE 1 FIGURE 2 FIGURE 3 PCA 2450 Overall Dimensions 44 1 cm 17 3 in PCA 2450 THD Plus Noise at 1 kHz Typical 30 kHz measurement bandwidth both oe operating 8 ohm loads DISTORTION IN OUTPUT POWER IN WATTS PCA 2450 intermodulation Distortion IMD SMPTE method 60 Hz 7 kHz both channels operating 8 ohm loads ntti aii ee ee a a e a Arni Bis 0 1 e n c Tea SS a EEE Et GR UNN Oo n ae i a nese OUTPUT POWER IN WATTS Output Devices Eight high power MOSFET devices Controls and Switches Input level controls front power switch front input mode switch rear output mode switch rear ground lift switch rear DSP corner frequency internal Front Panel Indicators Each Channel Five segment LED ladder for input levels five segment LED ladder for output levels processor on LED processor active LED Thermal Brain Circuit LED stereo and mono LED s mono indicates paralleled inputs BTL LED indicates bridged mono output Connections Input 3 pin XLR type balanced pin 2 positive Y a inch phone jack unbalanced Output Neutrik Speakon NL4MP for le
7. for easy interconnection of amplifiers Its speaker out puts are Neutrik Speakon connectors which provide a sturdy reliable connection and allow use of heavy wire for loss free signa transmis sion The EV Dynacord PCA 2450 is the choice for serious professional amplification needs which require optimum sound quality speaker protec tion and the highest level of construction quality and long term reliability Overall dimensions are shown in Figure 1 The front and rear panels are shown in Figure 4 Figure 2 displays 1 kKHz THD plus noise versus output power Figure 3 shows intermodulation distortion IMD versus output power ARCHITECTS AND ENGINEERS SPECIFICATIONS The power amplifier shall be a dual channel model of solid state design employing high power MOSFETS in a true complementary symmetry output circuit and capable of operat ing from a 120 200 220 240 V 50 60 Hz ac line The amplifier shall contain proprietary processing circuits designed to ameliorate low frequency phase and frequency response prob lems in loudspeakers protect against voice coil burnouts and prevent amplifier clipping The amplifier shall contain sensing circuitry to provide protection for the output transistors against overtemperature excessive output voltage radio frequency interference shorted loads and excessive output phase shift The load shall be similarly protected against infra sonic signals startup shutdown transients low
8. ft right and bridged outputs 3 pin XLR type for signal Power 1 8 m 6 0 ft three wire 16 gauge power cord Operating Voltage 120 volts 60 Hz ac Power Consumption both channels operating in dual mode At Maximum Mid Band Output Power 8 Ohms 1 175 watts 4 Ohms 1 950 watts At 250 W per Channel into 8 Ohms 1 000 watts At 400 W per Channel into 4 Ohms 1 700 watts At 25 W per Channel into 8 Ohms 300 watts At 40 W per Channel into 4 Ohms 550 watts Dimensions Height 9 5 cm 3 74 in Width 48 3 cm 19 0 in Depth 42 1 cm 16 6 in Color Dark gray Shipping Weight 19 1 kg 42 0 Ib Net Weight 16 5 kg 36 3 Ib DESCRIPTION The EV Dynacord PCA 2450 stereo power am plifier is a very high quality and unique pow er amplifier Its proprietary processing circuitry enables the amplifier to work with speakers to elicit their maximum performance while pre venting clipping and voice coil overheating Its powerful MOSFET amplifiers and large heavy duty power supply give the PCA 2450 tremen dous speaker playing ability Each channel delivers 320 watts of continuous average power into 8 ohms or 440 watts into 4 ohms over the full audio frequency range In bridged mode the amplifier can deliver more than 920 watts into 8 ohms at less than 1 THD The power supply with its large toroida a ESSE SESS EERE SSS BS SPAS BSS SSS SaaS BSS SaaS Eee EEEE STE EEE SEAS a E EEEE EREEREER EEEE ERTE Eaa taa ARAA EEA AE EEE EE
9. ll not be driven into clipping In conjunction with the audio processors the amplifier contains a Thermal Brain Circuit TBC which simulates the thermal behavior of speaker voice coils and limits the energy sup plied to the speaker in case of continuous peaks and danger of thermal damage Both the APC and TBC circuits operate while keeping the dynamic range of the input signal intact and without serious impact on sound quality The PCA 2450 has sixteen high power MOSFET output devices which are protected from heat damage by a separate temperature sensitive fan for each channel The massive extruded aluminum heatsink is engineered to minimize thermal gradients and ensure that all transis tors operate at approximately the same temper ature HOO SITE FOO OH CPERAT NG WODE 2 TMM O Ml I ELECTRONICALLY BALANCED INPUTS PA 2 PNJQ FAN 1 SHELO aa a aa n aa aS e a rE a th te ea ch eae acetate Tay eee A complete multifunction display keeps the user constantly informed about the operating mode and levels of the amplifier Separate displays for input and output levels of each channel processor activity and operating mode stereo or dual monophonic inputs par alleled and bridged mono output make it easy to see what the amplifier is doing The PCA 2450 has electronically balanced XLR type inputs and unbalanced s inch phone jack inputs The female XLR type input has a male XLR type connector in parallel
10. warranty gives you specific legal rights and you may also have other rights which vary from state to state Electro Voice and EV Dynacord Electronics are guaranteed against malfunction due to de fects in materials or workmanship for a period of three 3 years from the date of original pur chase Additional details are included in the Uniform Limited Warranty statement Service and repair address for this product Electro Voice Inc 600 Cecil Street Buchanan Michigan 49107 616 695 6831 or 800 234 6831 Specifications subject to change without no tice RASS Form 3844 9331 E REE eR ERE aR S EE
11. wer any mode 20 Hz 25 degrees 20 kHz 30 degrees THD Plus Noise at 1 kHz Dual Mode 4 Ohms lt 0 02 at 400 watts Bridged Mode 8 Ohms lt 0 03 at 800 watts Dual Mode 8 Ohms lt 0 01 at 250 watts 1 See Figure 3 for 1 kHz THD plus noise versus output power SSSA a as PCA 2450 Two Channel Processor Controlled Power Amplifier e Exclusive Dynamic Signal Processing DSP circuit ensures audibly superior sound e Audio Processor Control APC circuit prevents amplifier clipping e Thermal Brain Circuit TBC helps prevent voice coil burnouts e High power high current MOSFET output devices and huge power supply ensure tremendous speaker playing ability e Three year parts and labor sain A noes htee a tre teers ee OO waence ster sar tev etuareurcsnesahaa seatnsac Rien arhasiat vices astute het AUi IMD SMPTE 60 Hz 7 kHz typical Dual Mode 4 Ohms lt 0 03 Bridged Mode 8 Ohms lt 0 04 Dual Mode 8 Ohms lt 0 02 TIM DIM 100 Dual Mode 4 Ohms lt 0 03 at 400 watts Bridged Mode 8 Ohms lt 0 04 at 800 watts Dual Mode 8 Ohms lt 0 02 at 250 watts Rise Time 10 to 90 at rated output power Any Mode lt 2 usec Slew Rate Any Mode gt 70 V usec Damping Factor Any Mode gt 300 Noise below rated output power A weighted any mode gt 101 dB Amplifier Protection Excessive output voltage shorted loads excessive phase shift rf interference overtemperatur
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