Crate Amplifiers BV-50H Musical Instrument Amplifier User Manual
Contents
1. CH SEL RETURN REVERB EFFECTS FOOTSWITCH Loop 19 EFFECTS LOOP SEND Connection to an external effects device is made via this jack Connect a shielded instrument patch cord from the send jack to the input jack of the effect The send jack also doubles as a preamp out jack to feed a post eg signal to a mixing board recording console or external amplifier 20 EFFECTS LOOP RETURN Connection from an external effects device is made via this jack Connect a shielded instrument patch cord from the output jack of the effect to the return jack The return jack also doubles as a power amp in jack to feed a line level signal directly into the BV 50H s internal power amp This is useful when slaving two amplifiers together 21 LINE OUT JACK This 1 4 jack supplies an unbalanced output signal from the power amp for patching into a mixing board recording con sole or external amplifier The signal is elec tronically compensated to simulate the sound from a miked cabinet and comes directly from a tap off of the output transformer This gives you the tone of your preamp and power amp tubes MODEL BV 50 115VAC 60Hz 300 WATTS MAX CRATE E ENCLOSURES ENCLOSURE SPEAKER CONNECTIONS 50 WATTS RMS 1111 6 ENCLOSURES N OUT 22 SPEAKER JACKS Use these unbalanced 1 4 jacks to connect the amplifier to your speaker cabinet s as shown below NOTE You may use any configuration of impedances sh2. Word About Tubes System Block Diagram Technical Specifications RISK OF ELECTRIC SHOCK RISQUE D ELECTROCUTION ELEKTRISCHE SCHLAGGEFAHR DO NOT OPEN NE PAS OUVRIR NICHT OFFENEN CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK ATTENTION POUR REDUIRE D ELECTROCUTION NE PAS VORSICHT ZUR MINIMIERUNG ELEKTRISCHER SCHLAGGEFAHR NICHT DO NOT REMOVE COVER ENLEVER LE COUVERCLE AUCUNE PIECE INTERNE N EST REPRABLE DEN DECKEL ABENHMEN INTERNE TEILE KONNEN NICHT VOM NO USER SERVICEABLE PARTS INSIDE PAR L UTILISATEUR POUR TOUTE REPARATION S ADRESSER A UN BENUTZER GEWARTET WERDEN DIE WARTUNG IS QUALIFIZIERTEM REFER SERVICING TO QUALIFIED SERVICE PERSONNEL TECHNICIEN QUALIFIE WARTUNGSPERSONAL ZU UBERLASSEN THIS EQUIPMENT HAS BEEN DESIGNED AND ENGINEERED TO PROVIDE SAFE AND RELIABLE OPERATION INORDER TO PROLONG THE LIFE OF THE UNIT AND PREVENT ACCIDENTAL DAMAGES OR INJURY PLEASE FOLLOW THESE PRECAUTIONARY GUIDELINES CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT OPEN CHASSIS DO NOT DEFEAT OR REMOVE THE GROUND PIN OF THE POWER CORD CONNECT ONLY TO A PROPERLY GROUNDED AC POWER OUTLET WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE CAUTION NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL CAUTION THIS UNIT IS CAPABLE OF PRODUCING HIGH SOUND PRESSURE LEVELS CONTINUED EXPOSURE TO HIGH SOUND PRESSURE LEVELS CAN CAUSE PERMANENT HEARING IMPAIRMENT OR LOSS USER CAUTI
3. ON IS ADVISED AND EAR PROTECTION RECOMMENDED IF UNIT IS OPERATED AT HIGH VOLUME THE CHART BELOW SHOWS THE U S GOVERNMENT S OCCUPATIONAL SAFETY AND HEALTH ADMINIS TRATION OSHA REGULATIONS WHICH WERE IN EFFECT AT THE TIME OF THIS PUBLICATION FOR PERMISSIBLE NOISE EXPOSURE PER 29CFR1910 95 TABLE G 16 SOUND LEVEL DBA DURATION PER DAY SOUND LEVEL DBA DURATION PER DAY SLOW RESPONSE IN HOURS SLOW RESPONSE IN HOURS 1 11 2 1 8 6 4 1 2 3 1 4orless ACCORDING TO OSHA ANY EXPOSURE IN EXCESS TO THESE AMOUNTS LISTED ABOVE COULD RESULT IN SOME HEARING LOSS EXPLANATION OF DANGEROUS VOLTAGE IT IS NECESSARY FOR THE USER TO REFER TO THE INSTRUCTION MANUAL DANGER HAUTE TENSION REFERREZ VOUS AU MANUAL D UTILISATION GRAPHICAL SYMBOLS GEFAHLICHE SPANNUNG UNBEDINGT IN DER BEDIENUNGSANLEITUNG NACHSCHLAGEN CRATE BV SOH Guitar Amplifier Introduction The BV 50H is a feature packed professional stage performers amplifier Rugged construction reliable American craftsmanship and two powerful channels of pure tube power are some of the trademarks of this new and impressive piece of musician s equipment This amplifier features two distinctly different 12AX7 tube driven channels one with classic tube rhythm sounds and one offering you some of the finest lead and overdrive sounds of any stock amplifier Each channel features an all tube preamp section with three bands of equalization for total tone con trol The
4. Owner s Manual for the EV SOH All Tube Professional Series Custar Amplifier Be Ps MAINE go a E E E TAURO 7 4 CRATE BV SOH Guitar Amplifier Co comal Your love of performing and driving ambition to be the best have brought you to a turning point in your musical career the incredible BV 50H guitar amplifier A powerhouse of an amplifier designed to take you to the top and keep you there We know something about you we know you were never impressed with those toys that some of your friends called amplifiers We know you were holding out until someone offered you an American made affordable piece of professional equipment you could really sink your teeth into A serious amplifier designed for a serious musi cian an amp with the sounds you ve always looked for the power you ve always dreamed about and the reliabil ity you know you ll need And all with a name you know you can trust CRATE Like all Crate products your BV 50H is made with pride in America using only the best components Extensive testing at the hands and ears of skilled technicians and musicians insures you that this amplifier is the absolute best it can be In order to get the most out of your new amplifier we strongly urge you to go over the information contained in this manual before you begin playing And thank you for choosing CRATE Introduction Features The Front Panel The Rear Panel Some Suggested Settings A
5. expose extremely hazardous voltage levels always refer replacement of the preamp tubes to a qualified service center Insist upon using only the highest quality low microphonic tubes System Block Diagram 1 FOOTSWITCH PATENTED 0 CH 1 LED STANDBY POWER gt SITCHIN Y 306 CH 2 LED xe E POWER GE SUPPLY GAIN EFFECTS LOOP POWER SPEAKER INPUT AMP OUTS Pp gt 1 TUBE TUBE TUBE TUBE 1 1 1 STAGE STAGE STAGE STAGE REVERB VOLUME LOW MID HIGH LOW MID HIGH MASTER gt sees PRESENCE AN LINE REVERB OUT LEVEL 1 Amplifier Technical Specifications Output Power Rating Input Impedance Ch 1 System Gain Tone Controls Low Mid High Presence Control Effects Send Return Level Line Out Level Tube Complement Power Requirements Size and Weight 50 watts RMS nominal 5 THD 1M ohm 66dB 16dB range 100Hz 23dB range 300Hz 25dB range O 10kHz 50B boost 10kHz 0 7 RMS nominal 0 4V RMS nominal unloaded 12AX7 3 6L6 GT 5881 2 Low Mid High 115V 60Hz 110VA 2 5A Slo Blo Fuse 10H x 20 x 10 1 2 D 34lbs 9509 605 range O 72 130 range O 700Hz 12dB range 10kHz Crate continually develops new products as well as improves existing ones For this reason the specifications and information in this manual are subject to change without notice The BV 50H is covered with high quality durable Tolex T
6. master Presence control lets you custom tailor the sound of your guitar to suit your particular needs The Line Out signal is tapped directly from the speaker outputs then attenuated and frequency compen sated to replicate the sound of a miked speaker cabinet Two pairs of speaker output jacks provide easy impedance matching with a wide variety of cabinet configurations Cobre Here s a quick overview of the BV 50H s features and controls Additional information can be found on the pages indicated Patented Channel Switching Circuitry Achieves maximum use of each preamp tube so unique it s patented e Adjustable Presence Control Fully adjustable upper harmonics level for changing the presence of both channels page 4 Auto Biasing Circuitry Want to change your sound Change your tubes Internal circuitry allows the use of either 6L6 or EL34 power tubes with no bias adjusting page 7 D C filament supply for first stage eliminates the need for a hum balance control Effects Loop For noiseless patching of external effects or use as a preamp out power amp in con nection page 5 Line Out Jack Taken directly from the speaker output signal This frequency compensated output lets you patch into house sound boards recording consoles etc with ultimate sonic fidelity page 5 e Footswitch Jack This stereo jack tip for channel selection and ring for reverb on off control allows use of a two button foot
7. o keep it looking its best avoid abrasive cleansers Wipe the cabinet clean using a slightly dampened soft cloth Do not spray cleaners directly into the amplifier Never use brass cleaners on the hardware since they could damage their protective coatings 1996 SLM ELECTRONICS e division of St Louis Music e 1400 Ferguson Avenue St Louis Mo 63133 P N 47 584 51 6
8. ooking to change the sound of your amp you can replace the stock 6L6 power tubes with EL34 s 6L6 tubes tend to give you more of the American sound with lots of solid power even up to their full output with a lot of dynamic headroom EL34 tubes tend to give you that English British sound they distort sooner and provide a more controllable and less penetrating distortion effect when overdriven Either way your BV 50H has been engineered to facilitate power tube replacement with automatic biasing when changing tube types IF YOU DON T CONSIDER YOURSELF ADEPT WITH A SCREWDRIVER REFER POWER TUBE REPLACEMENT TO A QUALIFIED SER VICE CENTER Otherwise unplug your amp allow it to cool for at least thirty minutes and proceed as follows Turn the amp so you re looking at its rear panel Unscrew and remove the wooden rear cover Remove the power tubes one at a time by slightly spreading the wire tube clamps with one hand and gently pulling the tube out of the socket with the other hand When inserting new power tubes carefully align the tab in the tube s plastic base with the slot in the socket and press the tube gently but firmly into place Replace the rear cover piece and tighten the screws Avoid over tightening Power up the amplifier and let it sit for at least twenty minutes before playing If the amp starts to squeal gets noisy loses gain or starts to hum the preamp tubes may be bad Since removal of the tubes may
9. own at the speaker output jacks Impedance matching is automatic simply connect the cabinet s to the jack s labeled with the corresponding imped ance s of CABS JACK JACK amp IMPED S LOCATION S LABEL S 1 4 ohms 3 4 OHM 1 8 ohms 1 8 OHM 2 8 ohms 3 4 2 8 OHM 2 16 ohms 1 2 2 16 OHM Jacks numbered here for purpose of illustration only To avoid damaging the amplifier and the speaker cabinets don t use two 4 ohm cabi nets or one 8 ohm and one 4 ohm cabinet at the same time Do not connect a single 16 ohm cabinet to the speaker output jacks A SPEAKER LOAD MUST BE CONNECTED TO THE AMPLIFIER TO AVOID DAMAGING THE UNIT CRATE BV SOH Guitar Amplifier NET CHR VOM UNL YOLUN CRATE BV SOH Guitar Amplifier A Word Aleut Tubes Vacuum tubes can only last so long Allowing your amp to cool down before moving it will help prolong the life of the tubes Even so after about a year or sooner if you re on tour or jammin more frequently than most you may notice the output of your amp just isn t as alive as it used to be If the sound from your amplifier starts to grow weak lacks punch fades up and down loses highs and lows gets funny clanking sounds etc it s very likely that the power tubes are worn out and need replacing Since power tubes work together in an amplifier it is important that they all be replaced at the same time with a matched set of tubes If you re l
10. prepare themselves for action 15 POWER This switch applies AC voltage to the amplifier and should always be turned on first The switch lights up when the AC power is on BYV SOH Guitar Amplifier The Rear Panel 16 FUSE This fuse protects the amplifier against damages caused by overload condi tions in the unit If the fuse blows replace it only with the same size and type as indicated on the rear panel If the fuse blows continually the line voltage may be incorrect or the amp may need servicing 17 AC LINE IN Firmly plug the female end of the supplied power cord into this socket push ing it in until it is fully seated Plug the male end of the cord into a properly grounded AC outlet of the correct voltage DO NOT DEFEAT THE GROUND PIN OF THE AC PLUG Use only the supplied power cord If the amplifier is to be used outside of the United States see your authorized Crate dealer for information about alternate line cords and power converters if needed 18 CHANNEL SELECT REVERB FOOT SWITCH JACK Connect a stereo 1 4 plug tip ring sleeve here from a two button footswitch for control of channel switching and reverb The tip of the jack is for channel switch ing the ring is for reverb on off When a footswitch is connected here the front panel channel select switch is disabled MADE IN THE U S A BY SLM ELECTRONICS 1400 FERGUSON AVE ST LOUIS MO 63133 S PATENT 5 012 199 o O
11. switch page 5 e Speaker Jacks Impedance matched speaker connectors allows at least four different cabinet con figurations page 5 High Cosmetic Appeal and Stage Presence The unique cosmetics of the BV 50H serve as a trib ute to your good taste in musical equipment CRATE BV SOH Guitar Amplifier The Front Panel 1 INPUT Connect your guitar or wireless receiver into this standard 1 4 jack using a shielded instrument cable Channel 1 2 VOLUME Set the output volume level of channel 1 with this control 3 LOW Adjust the bottom end response with this control The low control covers a range of 16dB at 100Hz 4 MID Adjust the midrange response with this control The mid control covers a range of 23dB at 300Hz 5 HIGH Adjust the high end response with this control The high control covers a range of 2608 at 10kHz 6 CHANNEL Switch between channels with this push button switch The adjacent amber LED glows when channel 1 is selected switch out the red LED glows when channel 2 is selected switch in When a footswitch is used for channel switching this switch is dis abled Channel 2 7 GAIN Adjust the overdrive distortion level with this control In addition to gain changes this control also modifies the tone At low and mid gain settings the overdrive is very bluesy Reducing the volume at the guitar cleans up the signal to be similar to Channel 1 However at high gain settings
12. the guitar signal is contoured to add punch in the middle frequencies for a thick heavily saturated overdrive 8 LOW Adjust the bottom end response with this control The low control covers a range of 605 at 100Hz 9 MID Adjust the midrange response with this control The mid control covers a range of 13dB at 700Hz 10 HIGH Adjust the high end response with this control The high control covers a range of 1208 at 10kHz 11 MASTER Set the output signal level of channel 2 with this control At the 0 position full left very little or no signal will be heard as you bring the control up towards center the output level of channel 2 increases Use this control along with your guitar s volume and the Gain control 7 to produce a wide variety of sounds mw ag 9 STA DET PORT A a 4 14 5 12 REVERB Adjust the amount of reverbera tion with this control at the 0 position the sig nal is dry no reverb As you bring the control up the amount of reverb increases 13 PRESENCE Increase the level of upper harmonics with this control The presence con trol allows a boost of up to 5dB at 10kHz 14 STANDBY This switch activates the ampli fier and should always be turned on last The switch lights up when the high voltage power is passing through to the tubes NOTE When you first power up this amplifier leave the Standby switch OFF for at least 20 seconds This gives the power tubes a chance to
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