Electro-Voice TL880P User's Manual
Contents
1. 89 6 kg 197 5 Ib Shipping Weight 97 6 kg 215 3 Ib Amplifier see P1250 documentation for full specification System Output Power Continuous 4 ohm load bridged 100 to 130 volt ac line voltage 1 200 watts Power Bandwidth as Used in Bridged Mode 0 to 1 dB reference 1 kHz 20 20 000 Hz Frequency Response 1 dB reference 1 2 1 watt 10 30 000 Hz Total Harmonic Distortion Plus Noise at 1 kHz at rated power measurement bandwidth 80 kHz lt 0 01 Input Type True balanced electronic Connector 3 pin female XLR type connector wired according to the IEC 268 standard pin shield pin 2 positive pin 3 negative Polarity for positive sound pressure Pin 2 positive Sensitivity for 1 200 watt unclipped output System Gain Control Full Clockwise 0 dBu 0 775 volts Impedance 20 kilohms Controls and Switches Rear see Figure 6 and P1250 Settings section for default settings Limiter time constant processor pole frequency bridged mode switch hi lo cut filter input routing parallel or dual circuit to chassis switch parallel or dual Front Power on off switch indicator LED s two calibrated input level controls Power Consumption both channels operating in dual mode 1 8 power 4 Ohms 660 VA Input Voltage 120 V 50 60 Hz ac Tolerance of mains voltage 10 ac Line Cord 14 gauge three wire permanently attached power cable SPEAKERS Low Frequency Systems Electro2. to 24 dB per octave below 15 Hz P1250 Settings The TL880P is shipped with the P1250 rear panel processor settings set for step down mode See Figure 6 The speakers are con nected to the central bridged output In the event that the rear panel settings are dis turbed the proper settings are noted below The rear panel of the P1250 is easily acces sible through the access vent opening in the speaker enclosure side closest to the top of the amplifier Step Down Mode Settings as shipped 1 Limiter Time Constant switch Slow 2 Processor switch B6 3 Pole Frequency switch 26 4 Bridged Mode switch Bridged 5 Hi Low Cut Filter switch 15 Normal Mode Settings 1 Limiter Time Constant switch Slow 2 Processor switch Off 3 Pole Frequency switch N A 4 Bridged Mode switch Bridged 5 Hi Low Cut Filter switch 31 Hz Use in Multiples Cone loudspeakers may be stacked for greater acoustic output and a narrower beamwidth It is assumed that all cones are operating in unison or in phase This prin ciple is already employed in the dual woofer TL880P and is responsible for the higher sensitivity and narrower vertical beamwidth with the system long axis vertical relative to similar single woofer systems In addi tion two TL880P s can be used side by side and their combined performance will be dif ferent from that of a single TL880P in the ways outlined below At relatively low frequencies
3. 4 TL880P Directivity vs Frequency 1 DIRECTIVITY INDEX D dB Figure S TL880P 10 Power Harmonic Distortion Step Down with TT A ote Hime EQ oo TT pan ST TT IN LNT T PTT TT TT ONE Wt LT FREQUENCY IN HERTZ Figure 6 TL880P Amp Settings for P1250 Amplifier Settings Step Down Operation as shipped LPN BS LIMITER TIME Gij SOHZ BRIDGED CONSTANT MODE HI LO CUT 15 1 2 OFF PROCESSOR POLE FILTER be FREQUENCY FAST BRIDGED NORMAL ttings above require the vent cover to be in place as for proper and safe operation of the system wass sayeads paiamog Aduanbasj mo7 AlaA 4088711 TL880P Very Low Frequency Powered Speaker System TL880P Very Low Frequency Powered Speaker System System Specifications Typical Axial Frequency Response swept sine wave input 10 feet anechoic environment normalized for 1 watt 1 meter into speakers see Figure 1 23 1 800 Hz Low Frequency 3 dB Down Point Normal Tuning vent cover installed for step down mode with equalization 23 Hz Alternate Tuning vent cover removed no equalization 30 Hz Usable Low Frequency Limit 10 dB down point Normal Tuning vent cover installed for step down mode with equalization 20 Hz Normal Tuning vent cover installed for step down mode no equalization 18 Hz A
4. The TL880P is designed for typical cinema stage behind the screen applications where subwoofers are mounted on the stage floor In addition to the following specific infor mation the user may refer to the P1250 owner s manual The TL880P is not designed to be self sus pended from above and if suspended must be supported and hung in a way which does not depend on the structure of the TL880P itself for support Overall System Installation Precautions Please read the entire engineering data sheet before connecting the TL880P to your sys tem For optimum performance observe the following precautions l Keep the ac power switch off while making connections 2 certain that connectors are tightly mated Loose connections cause hum noise or intermittences that could dam age your speakers 3 Use the proper high quality shielded cables in your entire system Low ca pacitance cable is preferred 4 Turon the electronic equipment which feeds the TL880P first Wait eight to ten seconds then turn on the P1250 amplifier This prevents any transient pop which could damage a loud speaker 5 To prevent fire or electrical shock do not expose the TL880P to rain or ex cess moisture Driving Multiple TL880P s The high 20 000 ohm input impedance of the P1250 power amplifier allows several TL880P systems to be connected in parallel daisy chained to the usual single signal source without undesirable load
5. below about 150 Hz for typical TL series dimensions stacking produces additional acoustic out put without altering dispersion When a common signal is applied a 6 dB increase in maximum acoustic output occurs The cones mutually couple and act as one cone with twice the area therefore twice the effi ciency and twice the power capacity The additional cone area provides 3 dB more output and the additional power capacity accounts for the remaining 3 dB Specifically mutual coupling occurs at fre quencies whose wavelengths are longer that one quarter the center to center distance be tween the cones The highest frequency at which mutual coupling occurs is calculated from the following equation 3 000 D inches is the distance between f MAX where the cones and f Hz is the highest frequency at which coupling occurs When D is greater than One quarter wavelength which would occur if two TL880P s were widely spaced or at frequencies much above f even when closely spaced the increase in acous tic Output is limited to the 3 dB power han dling increase Service In the unlikely event the TL880P requires ser vice the woofer can be replaced or serviced from the front and the amplifier can be re placed or serviced from the top A service data sheet is available from Electro Voice Very Low Frequency Powered Speaker System Installation and Suspension of TL880P Enclosures
6. 0 20 000 Hz to the resultant 4 ohm load The P1250 has on board signal processing which supplies 1 Low frequency equalization nec essary for step down operation of the loudspeaker system pro viding an overall system response whose 3 dB down point f is 23 Hz i Infrasonic protection of the EVX 180A s below the P1250 s peak boost frequency of 26 Hz 3 Output limiting that prevents ampli fier clipping under high output con ditions The side mounted input for the amplifier facilitates behind the screen installation where limited space between the screen and theatre wall often makes it difficult to con nect to the back of an enclosure In addition to motion picture applications the TL880P is highly appropriate as the subwoofer in large multiway systems for contemporary music playback and sound reinforcement The 880 has more output below 40 Hz than the devices typically used in these applications in either the normal 25 Hz or alternative 30 Hz box tuning see Alternative Vent Tun Thus the TL880P is not only appropnate for the ing and Equalization Options section more typical 40 Hz and above subwoofer re quirements but also for those applications e g very low frequency synthesized effects and down tuned bass guitars that require high output below 40 Hz This extended low fre quency performance also plumbs the depths of the symphony orchestra and pipe organ Frequency Response The TL8
7. 80P s axial frequency response was measured in Electro Voice s large anechoic cham ber at a distance of 3 05 meters 10 feet with a swept sine wave input Figure 1 has been aver aged and corrected for 1 watt meter into the transducers Directivity The directional characteristics of the TL880P were measured in Electro Voice s large anechoic chamber the test signal was one third octave filtered pink noise at the fre quencies indicated A full sphencal measure ment system was used All directional informa tion was measured at 6 10 meters 20 feet Figure 2 illustrates the horizontal and verti cal polar responses Figure 3 shows the hori zontal and vertical beamwidths Beamwidth is the angle at which the horizontal and ver tical polar responses have decreased in leve by 6 dB when compared to the axial fre quency response Figure 4 illustrates the total directivity of the TL880P The directivity factor R is the ratio of the SPL of the TL880P at a given point to the SPL of an ideal omnidirectional source at that same point The directivity index D is calculated by D 10105 Power Handling Electro Voice components and systems are manufactured to exacting standards ensur ing they will hold up not only through the most rigorous of power tests but also TL880P Very Low Frequency Powered Speaker System s TLS880P Very Low Frequency Powered Speaker System through continued use in arduous
8. Fleclio VoiCe mE TL880P Very Low Frequency Powered Speaker System Digital Capable designed expressly to meet the dynamic and low frequency potential of digital sound on film THX approved Side mounted connection panel facilitates hookup when depth behind the screen is restricted Two EVX 180A 18 inch woofers rated at 2 000 watts of combined continuous program power provide very high low frequency pumping ability to below 23 Hz e Unusually extended LF response also appropriate for very low frequency synthesized effects down tuned bass guitars or pipe organ Internal P1250 power amp delivers 1 200 watts continuous to the loudspeakers On board P1250 processing provides step down EQ limiting to prevent amp clipping under high output conditions and infrasonic speaker protection THX is a registered trademark Lucasfilm Lid Description and Applications The Electro Voice TL880P is a member of the TL series of low frequency enclosures The TL880P is a powered subwoofer de signed expressly for digital sound on film and other applications which require very high low frequency pumping ability ex tending to 25 Hz and below The TL880P features an Electro Voice P1250 power am plifier set up in bridge mode driving two EVX 180A 457 mm 18 in speakers with a combined rating of 2 000 watts continu program connected in parallel The P1250 can deliver 1 200 watts continuous 2
9. Voice a MARK IV company 600 Cecil Street Buchanan MI 49107 800 234 6831 616 695 6831 616 695 1304 Fax Part Number 533431 9623
10. d Consequential Damages Excluded Product repair or replacement and return to the customer are the only remedies provided to the customer Electro Voice shall not be liable for any incidental or consequential damages including without limitation in jury to persons or property or loss of use waysks ieyeads palamog Aduanbeij mo7 Al2aA dO88 1h TL880P Very Low Frequency Powered Speaker System Very Low Frequency Powered Speaker System Some states do not allow the exclusion or limitation of incidental or consequen tial damages so the above limitation or exclusion may not apply to you Other Rights This warranty gives you specific legal rights and you may also have other rights which vary from state to state Electro Voice Speakers and Speaker Systems are guaranteed against malfunc due to defects materials or work manship for a period of five 5 years from the date of original purchase The Lim ited Warranty does not apply to burned voice coils or malfunctions such as cone and or coil damage resulting from im properly designed enclosures Electro Voice active electronics associated with the speaker systems are guaranteed for three 3 years from the date of original purchase Additional details are included in the Uniform Limited Warranty state ment Electro Voice Electronics are guaran teed against malfunction due to defects in materials or workmanship for a period of three 3 years from the dat
11. e of origi nal purchase Additional details are in cluded in the Uniform Limited Warranty statement Electro Voice Accessories are guar anteed against malfunction due to de fects in materials or workmanship for a period of one 1 year from the date of original purchase Additional details are included in the Uniform Limited Warranty statement Electro Voice Flying Hardware in cluding enclosure mounted hardware and rigging accessories is guaranteed against malfunction due to defects in materials or workmanship for a period of one 1 year from the date of original purchase Additional details are included in the Uniform Limited Warranty statement Figure 1 1 880 Axial Frequency Response 1 watt 1 meter into transducers Alternate Tuning no vent cover Normal Tuning with built in EQ Figure 2 TL880P Polars Horizontal Vertical __ __ D O 2 a es S CSS eon DY 24 T Sone HA TLSSOP Very Low Frequency Powered Speaker System jasa it e Figure 3 TL880P Beamwidth vs Frequency 80 Seats 2 Sas YE meee Ss Bie a SS el Bee 0580 5 meee HH Ht HHHH es 0 BEAMWIDTH IN DEGREES 6 dB 1 Woofers Horizontal Figure
12. er amplifier is not impeded A minimum clear ance of 76 mm 3 in should be maintained Architects and Engineers Specifications The loudspeaker system shall be an ampli fied dual low frequency bass reflex design Twe 18 inch woofers shall be front mounted in a 414 liter 14 6 ft enclosure The sys tem shall meet the following criteria The loudspeaker shall be capable of handling a total of 1 200 watts long term average with a 6 dB crest factor per ANSI EIA RS 426 A 1980 The system shall reproduce frequen cies to below 23 Hz at a usable level when used in step down mode with the supplied port cover in place The combined sensitiv ity of the loudspeakers shall be 98 dB at one watt one meter 100 to 800 Hz The sure shall be constructed of black texture painted plywood containing sound absorb ing glass wool The amplifier shall be side mounted and contain the necessary circuitry to provide all the equalization and protec tion needed to operate the system in step down mode The system with minor modifi cation can be used as a conventional vented box and amplifier The enclosure dimensions shall be 47 5 in x 30 0 in x 23 8 in 1 21 mx 0 76 0 60 Net weight shall be 89 6 kg 197 5 Ib The very low frequency system shall be the Electro Voice TL880P Uniform Limited Warranty Electro Voice products are guaranteed against malfunction due to defects in mate rials or workmanship f
13. included so comparisons can be made with competitive products Alternative Vent Tuning and Equalization Options The TL880P uses the on board signal pro cessing of the P1250 amplifier to provide the required equalization for operating in the step down mode This equalization reaches a maximum of 6 dB at 26 Hz and at 12 dB per octave below this frequency and at 24 dB per octave below 15 Hz Overall system re sponse is 3 dB down f at 23 Hz Achiev ing this same f without equalization would require twice the enclosure volume The loudspeaker is shipped with its central port cover in place to provide the appropriate 25 Hz box tuning This configuration must be maintained for as shipped operation of the TL880P The step down mode maximizes acoustic output ability at frequencies just below 30 Hz see Figure 1 appropriate for the TL880P s primary application as a cin ema very low frequency subwoofer If it is not desired to use the TL880P in the step down mode eliminating the need for boost and cut equalization it is necessary to remove the central port cover This moves box tuning up to 30 Hz and also moves the system f up to 30 Hz See the P1250 Set tings section for proper amplifier settings in the normal mode Subpassband Speaker Protection The P1250 power amplifier provides 1 2 dB per octave infrasonic protection of the EV X 180A s below the P1250 s peak boost frequency of 26 Hz Protection is increased
14. ing effects on the source Extra connectors on the P1250 facilitate such daisy chaining Signal Input and Polarity Convention The P1250 channel A input connector should be used It is easily accessible through the access vent opening in the speaker enclosure side closest to the top of the amplifier The connector is a three pin female connector pin 2 hot The TL880P does not invert polarity i e a positive voltage on pin 2 of the P1250 s input connector produces a positive out ward movement of the loudspeaker cones This relationship is important under some in stallation conditions P1250 Input Attenuator Settings In the factory bridged mono mode only the channel A input attenuator is operative During system set up the attenuator should be set in the full counterclockwise off po sition in order to avoid inadvertent and pos sibly excessive output from the TL880P When the TL880P is first operated under sig nal conditions the attenuator should be ad vanced only slightly to check for signal in tegrity the P1250 s front panel channel A green input LED helps in this regard Once proper system operation is confirmed the contro may be advanced to a point that pro vides in conjunction with the chosen drive level from upstream equipment the desired acoustic output level in the room System Physical Orientation and Placement Any orientation of the TL880P is acceptable as long as the air flow through the pow
15. lternate Tuning vent cover removed no equalization 27 Hz Sound Pressure Level at 1 Meter Maximum Gain and Amplifier at Clipping Threshold 0 dBu 0 775 volts rms into Balanced Input Anechoic Environment Swept Sine Wave 100 to 800 Hz Average 129 dB 50 to 125 Hz Average 127 dB Half Space Reference Efficiency transducers 6 0 Maximum Long Term Average Mid Band Acoustic Output 72 watts Dispersion Angle Included by 6 dB Down Points on Polar Responses see Figure 3 Essentially omnidirectional in subwoofer range more directive above System Distortion 0 1 Full Power Output Second Harmonic see Figure 5 100 Hz 0 9 Third Harmonic 100 Hz 0 4 Transducer Complement Two EVX 180A Transducer Impedance nominal minimum 4 0 4 2 ohms Net Box Volume 414 liters 14 6 ft Box Tuning Frequency Normal Tuning vent cover installed for step down mode 26 Hz as shipped Alternate Tuning vent cover removed 30 Hz Step Down Peak Boost Frequency see Alternative Vent Tuning and Equaliza tion Options section 26 Hz as shipped Hi Low Cut Filter Frequency 15 Hz as shipped Slope 12 dB as shipped Enclosure Materials and Colors Black texture painted poplar plywood Amplifier Safety Approvals in progress UL 813 CSA C22 2 65 ENG 0065 EMC Directive for European RFI EMI emissions Dimensions Height 1 21 m 47 5 in Width 762 mm 30 0 in Depth 605 mm 23 8 in Net Weight
16. or a specified period as noted in the individual product line statement s below or in the individual prod uct data sheet or owner s manual beginning with the date of original purchase If such malfunction occurs during the specified pe riod the product will be repaired or replaced at our option without charge The product will be returned to the customer prepaid Exclusions and Limitations The Limited Warranty does not apply to a exterior fin ish or appearance b certain specific items described in the individual product line statement s below or in the individual prod uct data sheet or owner s manual mal function 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 malfunction occurnng at any time after repairs have been made to the product by anyone other than Mark IV Audio Service or any of its authorized ser vice representatives Obtaining Warranty Service To obtain warranty service a cus tomer must deliver the product prepaid to Mark Audio Service or any of its autho nzed service representatives together with proof of purchase of the product in the form of a bill of sale or receipted invoice A list of authorized service representatives is avail able from Mark IV Audio Service at 600 Cecil Street Buchanan MI 49107 800 234 6831 or FAX 616 695 4743 Incidental an
17. real life conditions The eight hour ELA Loudspeaker Power Rating Full Range ANSI EIA RS 426 A 1980 uses a noise spectrum which mimics typical music and tests the thermal and mechanical capabilities of the components Electro Voice will support relevant additional standards as and when they become avail able Extreme in house power tests which push the performance boundaries of the woof ers are also performed and passed to ensure years of trouble free service Specifically the TL880P passes ANSI EIA RS 426 A 1980 with the following values R 4 80 ohms 1 15 x R 1 200 watts E MAX Test voltage 75 9 volts rms 151 8 volts peak The peak power handling capacity of a woofer is determined by the peak test volt age amount For the TL880P a 151 8 volt peak test voltage translates into 4 800 watts short term peak power handling capacity This is the equivalent of four times the erage power handling capacity and is a peak that can be sustained for only a few milliseconds However this sort of short duration peak is very typical in speech and music Provided the amplifier can reproduce the signal accurately without clipping the woofer will also perform accurately and re liably even at these levels Continuous program power is defined as 3 dB above double the continuous sine wave power rating The sine wave power rating is a two hour test performed at the minimum impedance of the system It is
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