Mesa/Boogie Bass Prodigy Скачать руководство пользователя страница 28

PAGE 23

  SPEAKER IMPEDANCE MATCHING & HOOK-UP GUIDE:  

  IMPEDANCE:  

   Wiring up speakers to provide the most effective load and making sure that all of them are in phase will help in 

creating the best sound possible. This is not too difficult, as long as you understand a few things about loading and how to connect 
your speakers to provide an optimal resistive load.

MESA/Boogie  amplifiers can handle 4 and 8 ohms effectively. Never run below 4 ohms in a tube amplifier unless you are absolutely 
certain that the system can handle it properly; this can cause damage to the Output transformer. A few amplifiers can handle 2 ohms 
effectively without damaging them ( for example the MESA’S Bass 400+ ). You can always have a higher resistance ( 16 ohms, for 
example ) without damaging results, but too low of a resistance will likely cause problems.

  MIS-MATCHING:  

   When running a higher resistance ( for example:  8 ohm output into 16 ohm cabinet ), a slightly different feel 

and response will be eminent. A slight mismatch can provide a darker smoother tone with a little less output and attack. This response 
is a result of the amplifier running a bit cooler. Sometimes when using more than one cabinet a mismatch will be the only option.

  WHAT IS MY CABINETS IMPEDANCE:  

   If you have only a single speaker, you just match that single speakers impedance 

to the amplifier, and you are done. In many cases, you will have a number of speakers, and then you must calculate the “load” that the 
amplifier will need to support. There are generally three ways to wire multiple speakers together. They are as follows:

  SERIES:  

   When you wire ( hook-up ) speakers in Series, the speakers resistance ( as measured in ohms ) is additive - i.e. putting 

two 8 ohm speakers in Series results in a 16 ohm load.

Speaker A = 8 Ohms

Speaker B = 8 Ohms

SERIES:  

Connect the Negative side of Speaker A

to the Positive side of Speaker B

POSITIVE  =

NEGATIVE  =

BL

AC

K

 

SH

AD

O

W

BL

AC

K

 

SH

AD

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Содержание Bass Prodigy

Страница 1: ...Owner s Manual THE HOME OF TONE...

Страница 2: ...wn Your reward is that you are the new owner of an amp bred of fine all tube heritage benefiting from the many pioneering and patented Mesa circuits that led to the refinement of your new model We fee...

Страница 3: ..._________________________________________________________ 11 STANDBY SWITCH__________________________________________________________________________________ 11 REAR PANEL AC MAINS FUSE FUSE RATING AN...

Страница 4: ...y exit from the apparatus Only use attachments accessories specified by the manufacturer Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qu...

Страница 5: ...nnections Do not use excessive force when handling buttons switches and controls Do not use solvents such as benzene or paint thinner to clean the unit Always connect to an AC power supply that meets...

Страница 6: ...Stanley Clark Jack Blades Michael Anthony Blasko and Bootsy Collins are but a few of the international stars that put the 400 center stage to anchor the band during its 20 year build cycle Those iconi...

Страница 7: ...ed by the same Front Panel LED triggered by the mini toggle MUTE PLAY SILENT RE CORD switch Red LED ON MUTE The SILENT RECORD setting allows you to safely mute the signal at the Power Amp and use the...

Страница 8: ...START PROCEDURE When powering up your PRODIGY from cold ALWAYS follow this Start Up Procedure We have found the currently available KT88s require substantially more time than 6L6s or EL34s to warm up...

Страница 9: ...and delivers many of the characteristics of several different manufacturer s iconic amplifiers in one simple to use control Use the VOICE Control to take a broad aim at the sound playing style you are...

Страница 10: ...t setting The NORMAL input is also a great choice if your bass or cabinet or both leans toward being a little on the bright side or if you find the Prodigy to sound bright with other elements of your...

Страница 11: ...ASS control is actually a gain and frequency control all rolled into one with the Q center at 55Hz As mentioned above though it is centered here frequencies harmonics in both low and high direc tions...

Страница 12: ...ity associated with a traditional passive TREBLE control The active TREBLE control completes the rotary tone control string to create a powerful and extremely accurate network to use as your fundament...

Страница 13: ...ry sensitive The MASTER allows you to set the preamp s GAIN control across a wide range of input headroom possibilities from completely clean to tube overdrive and compensate for these extremes giving...

Страница 14: ...your applications that don t require maximum output and headroom you can lengthen the interval between re tubing if you employ power tube rotation swapping the ones used in HALF Power with the ones t...

Страница 15: ...ce whenever interfacing with Consoles whether Recording or Live Sound to ALWAYS begin your set up regimen by zeroing out the D I LEVEL control BEFORE flipping the POWER switch to the ON position This...

Страница 16: ...ool your amp down and put it in an idle state during set breaks This is actually easier on the tubes than turning the POWER completely off only to fire it back up again 15 minutes later The shock of i...

Страница 17: ...PAGE 12 REST AREA...

Страница 18: ...f the speaker jacks For this system to be totally ef fective you must insure that the plug is FULLY inserted into the amplifier and that the other end of the speaker cable is also connected to your ca...

Страница 19: ...RETURN EFFECTS LOOP NOTE To avoid any loud and potentially dangerous pops and noises set the amp to Standby before connecting or disconnecting any effects to the Send or Return jacks This will prevent...

Страница 20: ...ks with an external master switching device or a single tip to ground on off latching footswitch NOTE Use shielded audio cable for connecting the TUNER Output to an external tuner SLAVE This jack is t...

Страница 21: ...ures proper loading of the Output Transformer and Tubes For more ideas and instruction on connecting your cabinets properly see the diagrams in the Rear of this Manual on SPEAKER CONNECTION But first...

Страница 22: ...et into one 4 OHM SPEAKER OUTPUT 4 Ohm Cabinet into the 4 OHM SPEAKER OUTPUT SPEAKER OUTPUT AUTO MUTE FUNCTION Your PRODIGY has built in Output Transformer protection against a No Load scenario in the...

Страница 23: ...he D I POST Position However the final output level that appears at the D I OUTPUT jack is set by the D I OUTPUT control on the Front Panel The overall range of signal available is optimized for Conso...

Страница 24: ...GROUND FULL HALF PWR D I PRE POST B R I G H T A C T I V E 3 2 4 5 1 Four 88 MUTE SIL REC P L A Y SAMPLE 4 Rock Growl NORMAL INPUT POWER ON ON STANDBY D I LEVEL SOLO GAIN BASS MID TREBLE VOICE MASTER...

Страница 25: ...TREBLE VOICE MASTER PLAY MUTE D I LIFT GROUND FULL HALF PWR D I PRE POST N O R M A L A C T I V E 3 2 4 5 1 Four 88 VINTAGE INPUT POWER ON ON STANDBY D I LEVEL SOLO GAIN BASS MID TREBLE VOICE MASTER P...

Страница 26: ...de our designer s sweet spot are unnecessary and usually undesirable unless you like paying a tech to re set your amp s bias voltage But KT 88s are different and sampling them from various suppliers r...

Страница 27: ...is also printed on the chassis top Tube Deck and consists of the following steps SET BIAS For Non Technicians 1 Set the BIAS SWITCH located on the upper Rear Tube Deck to OPERATE Make sure the amp is...

Страница 28: ...higher resistance for example 8 ohm output into 16 ohm cabinet a slightly different feel and response will be eminent A slight mismatch can provide a darker smoother tone with a little less output an...

Страница 29: ...ve side of Speaker A to the Negative side of Speaker B COMBINATION OF SERIES PARALLEL This is really just two sets of Series wired speakers connected in Parallel This is how you maintain a consistent...

Страница 30: ...CHEMES Amplifier to Speaker Cabinets 4 OHM 8 OHM 16 OHM Partial back view of amplifier 16 Ohm Cabinet 4 OHM 8 OHM 16 OHM Partial back view of amplifier 16 Ohm Cabinet SAFE MISMATCH 8 OHM 4 OHM 4 OHM P...

Страница 31: ...ack view of amplifier SAFE MISMATCH 8 OHM Partial back view of amplifier SERIES BOX 8 Ohm 4 Ohm 4 Ohm 4 Ohm Cabinet 4 Ohm Cabinet 4 OHM 4 OHM 8 OHM Partial back view of amplifier PARALLEL BOX 8 Ohm 16...

Страница 32: ...hm 8 Ohm Cabinet 10 SAFE MISMATCH 12 4 OHM 4 OHM Partial back view of amplifier 16 Ohm Cabinet 16 Ohm Cabinet 11 8 OHM 8 Ohm Cabinet 16 Ohm Cabinet 16 Ohm Cabinet 4 OHM 4 OHM 8 OHM Partial back view o...

Страница 33: ...et 8 Ohm Cabinet SERIES BOX 16 Ohm 8 Ohm 8 Ohm 16 Ohm Cabinet 13 SAFE MISMATCH WIRING SCHEMES Amplifier to Speaker Cabinets 4 OHM 4 OHM 8 OHM Partial back view of amplifier 16 Ohm Cabinet 16 Ohm Cabin...

Страница 34: ...You ll probably be successful with much less effort than is required to disconnect everything and haul the unit to a technician who will basically perform the same simple tests If the tubes are still...

Страница 35: ...possibly damaged Pre amp tubes don t normally wear out as a rule Therefore it is not a good idea to change them just for the sake of changing them If there isn t a problem don t fix it If there is no...

Страница 36: ...PAGE 31 NOTES...

Страница 37: ...INFO MESABOOGIE COM BEFORE CHANGING TUBES FLIP POWER STANDBY SWITCH TO OFF INPUT JACK 12AX7 V3 12AX7 V2 12AX7 V1 KT 88 V7 KT 88 V6 KT 88 V5 KT 88 V4 SET BIAS LED TRIM OPERATE FRONT OF CHASSIS TUBE REP...

Страница 38: ...VOICE 4 OHM 8 OHM 4 OHM SEND RETURN POWER ON ON STANDBY D I LEVEL SOLO GAIN BASS MID TREBLE VOICE MASTER D I LIFT GROUND FULL HALF PWR D I PRE POST CAUTION WARNING h 5 A SLO BLO 120 V 60 Hz 6 A CAUTI...

Страница 39: ......

Страница 40: ...09 20 13...

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