Electro-Voice B-2150M User's Manual
Contents
1. MEO NG APPROVED EQU 2 ALL THE COAWECTIONS ACE THE EXCEPTION OF THE LUGS t COOMELT 3 THEY ABE ASSEMBLY 3 VSE LAD UMRE AROM LIEN TERRUVALS TOGETHER 4 TM 15 SHAD BE PRESSE Sat HWLD Sh 4O te 5 APPLY EV 97499 TO SIDE M ITEM t AND INSTALL TEM HANMER APDLY EV 9749 MSTALL IIMS S M TEAS2. SPECIFICATIONS Useable Frequency Response 40 5 000 Hz Half Space Reference Efficiency B 1150M 6 2 B 2150M 12 4 Long Term Average Power Handling Capacity Per EIA Standard RS 426 A See Power Handling Capacity section B 1150M 200 watts B 2150M 400 watts Maximum Woofer Acoustic Output B 1150M 12 4 watts B 2150M 49 6 watts Sound Pressure Level at 1 Meter 1 Watt Input Anechoic Environment Band Limited Pink Noise Signal B 1150M 103 dB B 2150M 105 dB Distortion 0 1 Full Power Input Second Harmonic 100 Hz B 1150M 1 5 B 2150M 5 0 Second Harmonic 1 000 Hz B 1150M 3 0 B 2150M 3 0 Third Harmonic 100 Hz B 1150M 1 5 B 2150M lt 1 0 Third Harmonic 1 000 Hz B 1150M lt 1 0 B 2150M 1 0 Distortion 0 01 Full Power Input Second Harmonic 100 Hz B 1150M lt 1 0 B 2150M 2 0 Second Harmonic 1 000 Hz B 1150M lt 1 0 B 2150M lt 1 0 Third Harmonic 100 Hz B 1150M lt 1 0 B 2150M lt 1 0 Third Harmonic 1 000 Hz B 1150M lt 1 0 B 2150M lt 1 0 Transducer Complement High Frequency Vented Midrange Low Frequency B 1150M 1 EVM 15L B 2150M 2 EVM 15L Box Tuning Frequency 44 Hz Crossover Frequency 600 Hz Impedance Nominal B 1150M 8 ohms B 2150M 4 ohms Minimum B 1150M 5 3 ohms B 2150M 2 9 ohms Input Connections Parallel Ya in phone jacks allows paralleling of multiple speakers Enclosure Materials and Colors Black carpet covered Road W
3. d publish a power test closely related to real life conditions First we use a random noise input signal because it contains many frequencies simultaneously just like real voice or instrument program Second our signal contains more energy at extremely high and low frequencies than typical actual program adding an extra measure of reliability Third the test signal includes not only the overall long term average or continuous level which our ears interpret as loudness but also short duration peaks which are many times higher than the average just like actual program The long term average level stresses the speaker thermally heat The instantaneous peaks test mechanical reliability cone and diaphragm excursion Note that the sine wave test signals sometimes used have a much less demanding peak value relative to their average level in actual use long term average levels exist from several seconds on up but we apply the long term average for several hours adding another extra measure of reliability Specifically the B 1150M and B 2150M are designed to withstand the power test described in EIA Standard RS 426 The EIA test spectrum is applied for eight hours To obtain the spectrum the output of a white noise generator white noise is a particular type of random noise with equal energy per bandwidth in Hz is fed to a shaping filter with 6 dB per octave slopes below 40 Hz and above 318 Hz When measured wit
4. dispersion is obtained at the high end which offers listeners off axis of the speaker system the same briliant sound and clarity as on axis The VMR gives the musician a new freedom in exploring creative percussive bass sound The low frequency section was specifically designed for the bass guitar utilizing the EVM 15L 15 inch musical instrument loudspeaker Using Thiele Smail parameters performance was optimized for maximum efficiency down to 40 Hz and minimum wo o SPL in dB fos o 20 30 50 100 200 500 1000 2000 5000 10000 20000 FREQUENCY IN HERTZ FIGURE 1 B 1150M B 2150M Frequency Response 4 Volts at 10 Feet Swept Octave Band Pink Noise Half Space Environment B 1150M B 2150M VMR ONLY FIGURE 2 EVM 1SL ONLY m m B 1150M Polar Response in Horizontal Plane EVM 15L vs VMR at 4 kHz 5 dB per Division ptt speaker diaphragm excursion at the lowest bass tones This allows you to obtain maximum acoustic output without the speaker bottoming under any normal playing conditions The B 1150M is a two way system containing one EVM 15L low frequency speaker and one VMR in a 4 cubic foot enclosure The B 2150M is also a two way system but with two EVM 15L speakers and one VMR in an 8 cubic foot enclosure ENCLOSURE CONSTRUCTION The 8 1150M and B 2150M enclosures utilize a structural material that combines the strength of high quality plywood with the density and acoustic damping of pa
5. ght or laid down on its side When placed horizontally both EVM 15L s couple closely to the floor providing an even heavier sound quality FREQUENCY RESPONSE The combination of 15 inch woofer and vented midrange provide the wide and smooth overall response shown in Figure 1 for both the B 1150M and the B 2150M The response was measured at 10 feet using a swept 3 octave input of 4 volts no external equalization was used DIRECTIVITY The advantage of using the VMR is shown dramatically in the polar response curves of Figure 2 The curves of the B 1150M at 4 kHz are shown with the EVM 15L only and the VMR only The more narrow curve is that of the EVM 15L which shows that at a frequency of 4 kHz the EVM 15L is becom ing very directional This same effect holds true for other high frequencies as well Such a response is quite typical for 15 inch speakers in general because the larger the diameter of the speaker the more directional the response is at higher frequencies Although a 10 or 12 inch speaker would show some improvement the same problem would still exist This is the reason Electro Voice adds the VMR The broader more uniform curve of the VMR means that the angle of coverage is greater This makes the brighter bass guitar sound possible and distributes this sound evenly throughout the performing area POWER HANDLING CAPACITY To our knowledge Electro Voice was the first U S manufacturer to develop an
6. h the usual contant percentage bandwidth analyzer one third octave this shaping fiiter produces a spectrum whose 3 dB down points are at 100 Hz and 1 200 Hz with a 3 dB per octave slope below 1 200 Hz This shaped signal is sent to the power amplifier with the continuous power set at 200 watts into the 6 ohms EIA equivalent impedance for the B 1150M and 400 watts into the 3 ohms EIA equivalent impedance for the B 2150M 34 6 volts true RMS Amplifier clipping sets instantaneous peaks at 9 dB above the continuous power or 1 600 watts peak for the B 1150M and 3 200 watts peak for the B 2150M 98 0 volts peak This procedure provides a rigorous test of both thermal and mechanical failure modes GRILLE REMOVAL The grille assemblies of the B 1150M and B 2150M are fastened to the enclosure using sturdy dual lock fasteners The grille assembly can be removed quickly and easily allowing access to the drivers by firmly pulling on the two black polyester ribbon loops provided WARRANTY Limited Electro Voice Speakers and Speaker Systems excluding active electronics are guaranteed for five years from date of origina purchase against malfunction due to defects in workmanship and materials If such malfunc tion occurs unit will be repaired or repiaced at our option without charge for materials or labor if delivered prepaid to the proper Electro Voice service facility Unit will be returned prepaid Warranty does not extend to f
7. inish appearance items burned coils or malfunction due to abuse or operation under other than specified conditions including cone and or coil damage resulting from improperly designed enclosures nor does it extend to incidental or consequential damages Some states do not allow the exclusion or limitation of incidental or consequential damages so the above exclusion may not apply to you Repair by other than Electro Voice or its authorized service agencies will void this guarantee A list of authorized warranty service agencies is available from Electro Voice Inc 600 Cecil Street Buchanan MI 49107 AC 616 695 6831 Electro Voice Inc 3810 148th Avenue N E Redmond WA 98052 AC 206 881 9555 and or Electro Voice West 8234 Doe Avenue Visalia CA 93291 AC 209 651 7777 This warranty gives you specific legal rights and you may also have other rights which vary from state to state Service and repair address for this product Electro Voice Inc 600 Cecil Street Buchanan Michigan 49107 Specifications subject to change without notice MANUFACTURING PLANTS AT B BUCHANAN MI BB NEWPORT TN MB SEVIERVILLE TN B REOMOND WA E GANANCQUE ONT Ey ELECTRO VOICE INC 600 Cecil Street Buchanan Michigan 49107 Guiton Industries Inc 1985 Luho In USA a QURON company Part Number 530560 538 DETAIL A SCALE FULL 30 MFD BIISOM SCHEMATIC 30MFD Noes l SECURE ITENS 243 WD ITEP HWA
8. ood Dimensions B 1150 Height 72 9 cm 28 7 in Width 61 9 cm 24 4 in Depth 35 1 cm 13 8 in B 2150 Height 90 2 cm 35 5 in Width 71 1 cm 28 0 in Depth 49 2 cm 19 4 in Net Weight B 1150M 45 0 kg 99 b B 2150M 62 3 kg 137 Ib Shipping Weight B 1150M 47 7 kg 105 1b B 2150M 66 8 kg 147 Eleciro Voice a gultan company Model B 1100M B 2100M Two Way Bass Speaker Systems DESCRIPTION The Electro Voice Model 8 1150M and 8 2150M are a fresh new approach to bass guitar speaker design Bass speakers have been evolving from the traditional dull bass guitar sound to the wider range high ndelity bass sound Electro Voice has taken this process one step further by adding our exclusive vented midrange cone speaker VMR enabling the performer to achieve a full powerful sound with clarity and articula tion that simply is not available from standard bass speaker designs The enclosure is constructed o Road Wood a structural material mace of layered and selectively oriented hardwocd stands The covering is abuse resistant biack carpeting The VMR features a 6 inch cone coupled to a massive 16 lb magnetic structure the same size we use for our ia woofers to cover the range of frequencies 600 Hz and above This EV innovation represents a unique way of providing high acoustic output and efficiency from a compact direct raciator form of loudspeaker In addition greater
9. rticle board without brittleness Road Wood uses the same principle of crossbanding veneers as in plywood in order to achieve its very high rigidity A tough liquid phenolic resin is blended with long narrow strands of hard wood Alternate layers are perpendicularly bonded under intense heat and pressure to form panels of superior uniformity Unlike many grades of plywood Road Wood is dimensionally stable water resistant and free from voids A combination of dado cut joints tough adhesives and proper bracing ensure a sonically dead enclosure free from panel resonances The densely woven industrial grade abuse resistant carpeting provides a finish that is bath attractive and highly durable Large heavy duty metal corner protectors firmly secured rubber feet and recessed handles complete the picture and ensure that the B 1150M and 8 2150M speaker systems are ideally suited to a long and reliable life ton the road In addition the B 2150M enclosure is equipped with heavy duty castors APPLICATIONS The B 1150M and B 2150M are speaker systems designed for the bass guitanst The B 1150M has a lighter sound preferred by many jazz bass players It is also ideal for studio use In addition B 1150M s may be Stacked in multiples for sufficient output to cover larger rooms and still retain the light sound The 8 2150M has a heavier sound prefer red by many rock bass players The B 2150M may be used upri
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