Mesa/Boogie BASS STRATEGY Eight:88 Скачать руководство пользователя страница 20

PAGE 15

NOTE: The STRATEGY draws a substantial amount of AC current due to its high power and robust power transformer. Having 
multiple amplifiers connected to the same AC source (power strip or even the same 15 amp Circuit), using long extension cords or 
playing at extreme volumes can increase the likelihood of a circuit breaker tripping. If a breaker does trip, check to see what else may 
be on that same circuit (refrigerator, fans in use, other amplifiers, etc.) and remove any “unconditioned” power strips, extension cords 
and amplifiers and try to plug the STRATEGY directly into the wall Outlet—preferably one with only the STRATEGY or very little else 
on that circuit.

NOTE: NEVER ALTER THE 3-PRONG POWER CORD IN ANY WAY. Doing so will void your warranty and increase the risk of electri-
cal shock. 

  EXT  (EXTERNAL) SWITCHING  

   These four ¼” phone jacks allow external, remote switching of the MUTE, SOLO, EQ and 

VOICE Features for easy interfacing with a master (usually MIDI) switching system. Most MIDI controllers and switching interfaces 

utilize simple tip-to-ground latching-type switch logic, which is industry standard and provided for on virtually all 
brands and types of master switching systems on the market. 

These jacks may also be used with single button tip-to-ground latching-type footswitches to isolate any of the four 
features for individual control. This allows those who don’t need all four features to be footswitchable to just use 
single or smaller boxes on their pedal board for just the features they need to control. There are common individual 
Control Footswitches offered by many manufacturers and Mesa also sells single button tip-to-ground footswitches 

for these functions as well. You can purchase Mesa single button footswitches from your local Mesa Authorized dealer or direct from 
the factory. 

NOTE: Use unshielded cables for the EXT. SWITCHING functions. 

NOTE: The EXT SWITCHING Features are controlled by standard tip-to-ground latching-type logic.

  FOOTSWITCH (OPTIONAL)  

   An optional STRATEGY Footswitch is available that provides remote control of the VOICE, 

MUTE/TUNE, EQ, FX(LOOP) and SOLO features. It also features a ¼” TUNER OUT jack on the left side that provides for connec-

tion of a tuner at the location of the Footswitch. When MUTE is selected on the Footswitch the signal at the SPEAKER 
OUTPUTS will be silenced but the signal at the TUNER jack on the Footswitch will still be active so you can tune your 
instrument silently without having to run a cable back to your amplifier. The VOICE button allows you to toggle the VOICE 
feature from Mode (position) 1, 2, 4 and 5 back to the “Bypassed/Flat” setting of Mode #3. 

The female 8-Pin DIN receptacle on the Rear Panel just to the right of the EXTERNAL SWITCH JACKS is for the optional 
STRATEGY Footswitch. Connect the 8-Pin DIN cable to this receptacle when the STRATEGY Footswitch is to be used to 

control the VOICE, MUTE (TUNE), EQ, FX (LOOP) and SOLO. Make sure the cable is oriented correctly—with the pins lining up with 
the sleeves in their jacks and then be sure it is properly seated (all the way in) when inserting the cable into the 8-Pin DIN receptacle 
and the footswitch. 

NOTE: NEVER force an improperly aligned cable! It can be connected easily when properly aligned.

NOTE: It is good practice to secure the Footswitch cable so that it will not be stressed should someone step on, trip over or pull the 
cable sideways in some manner. This could cause damage to the pins on the male end of the cable or even possibly the sleeves within 
the DIN jack. The simple, time tested gaffer’s (duct) tape is a good idea even if you and your band mates don’t move around much 
during performance—someone else might.

INPUT

MAINS

FUSE

EXT

SWITCHING

LOOP

EXT

SWITCH

HAND BUILT

IN PETALUMA,

CALIFORNIA U.S.A.

TUBE GUIDE

3

 

x

 

12AX

7   8

 

x

 

KT-88

BASS  STRATEGY

VACUUM TUBE

AMPLIFIER

FOOT 

SWITCH

USE

WITH

TWO

8

CABS

4 OHM

4 OHM

8 OHM

2 OHM

2 OHM

D.I. OUT

MUTE

SOLO

V

OICE

EQ

SLAVE 

LEVEL

RETURN

SEND

TUNER

SLA

VE

POWER

ON

ON

STANDBY

D.I. LEVEL

SOLO

EQ

0

EQ IN

EQ FS

HALF

FULL PWR

LOW PWR

33Hz

80

150

300

600

900

2K

5K

8K

D.I. PRE

POST

CAUTION!

WARNING!

D.I. LIFT

GROUND

PATENTED

6,724,897

h

10 A

SLO

BLO

120 V~

60 Hz

10 A

USE

WITH

TWO

4

CABS

GAIN

BASS

MID

TREBLE

VOICE

MASTER

3

2

4

5

1

+

-

SPEAKER

MUTE ON UNLESS SPKR IN

OUTPUT

NORMAL

B

R

I

G

H

T

A

C

T

I

V

E

Eight:88

HOME OF TONE

®

®

MUTE

SIL. REC.

P

L

A

Y

INPUT

MAINS

FUSE

EXT

SWITCHING

LOOP

EXT

SWITCH

HAND BUILT

IN PETALUMA,

CALIFORNIA U.S.A.

TUBE GUIDE

3

 

x

 

12AX

7   8

 

x

 

KT-88

BASS  STRATEGY

VACUUM TUBE

AMPLIFIER

FOOT 

SWITCH

USE

WITH

TWO

8

CABS

4 OHM

4 OHM

8 OHM

2 OHM

2 OHM

D.I. OUT

MUTE

SOLO

V

OICE

EQ

SLAVE 

LEVEL

RETURN

SEND

TUNER

SLA

VE

POWER

ON

ON

STANDBY

D.I. LEVEL

SOLO

EQ

0

EQ IN

EQ FS

HALF

FULL PWR

LOW PWR

33Hz

80

150

300

600

900

2K

5K

8K

D.I. PRE

POST

CAUTION!

WARNING!

D.I. LIFT

GROUND

PATENTED

6,724,897

h

10 A

SLO

BLO

120 V~

60 Hz

10 A

USE

WITH

TWO

4

CABS

GAIN

BASS

MID

TREBLE

VOICE

MASTER

3

2

4

5

1

+

-

SPEAKER

MUTE ON UNLESS SPKR IN

OUTPUT

NORMAL

B

R

I

G

H

T

A

C

T

I

V

E

Eight:88

HOME OF TONE

®

®

MUTE

SIL. REC.

P

L

A

Y

Содержание BASS STRATEGY Eight:88

Страница 1: ...Owner s Manual ...

Страница 2: ...own 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 feel confident this amp will in spire many hours of musical satisfaction and lasting enjoyment It was built with you in mind by players who know the value of a fine musical instrument and the commitment...

Страница 3: ...______________________________________________________________________ 14 POWER CABLE__________________________________________________________________________________ 14 15 EXT SWITCHING____________________________________________________________________________________ 15 FOOTSWITCH OPTIONAL ____________________________________________________________________________ 15 SPEAKER OUTPUTS__________...

Страница 4: ...ey 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 qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the app...

Страница 5: ...o avoid damaging your speakers and other playback equipment turn off the power of all related equipment before mak ing the connections 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 the power supply specifications listed on the rear of the unit Export model...

Страница 6: ...lins 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 iconic amps still bring top dollar when you can find one changing hands on the pre owned market While MESA has since pioneered an entire line of tube driven mosfet amplifiers that shored up our place in the Bass market the discontinuation of the 400 left a gaping hole...

Страница 7: ...ns LOW opens up many stylistic possibilities in the recording domain and may also work for some lower volume gigs An important collection of vintage inspired sounds await you here in HALF and LOW POWER ranging from round and warm to edgy to clipped and growling depending how you dish it out from the MASTER All the sounds in HALF and LOW POWER beg to be recorded A MUTE PLAY SILENT RECORD switch all...

Страница 8: ... pair of jacks for the SLAVE and TUNER Outputs The SLAVE jack provides a 1 4 output for capturing the sound of both preamp and power section tonality right off the SPEAKER OUTPUTS to send on to additional power sections and cabinets for truly coliseum grade rigs The SLAVE LEVEL control is located on the upperTube Deck just above and to the right of the Rear Panel LOOP jacks Always begin with the S...

Страница 9: ...e tubes internal components are allowed to warm up slowly before hitting them with the high voltage controlled by the STANDBY being switched to ON 3 Flip STANDBY to ON 4 PLAY Following this startup procedure will lengthen the musical life of your power tubes and decrease the chances of untimely power tube failures HELPFUL HINTS IMPORTANT The SPEAKER OUTPUT Jack s AUTO MUTE function is triggered an...

Страница 10: ... chase great Tone around in circles Instead use your IQ and constantly reference a less altered state of play when experiment ing with the Controls VOICE and EQ By going back and forth to a more flat or conservatively voiced setting you will avoid ear fatigue and end up with a more balanced sound The SOLO Feature can be used to not only boost your level for featured parts but as an additional MAST...

Страница 11: ...eat choice if your bass or cabinet or both leans toward being a little on the bright side or if you find the STRATEGY to sound bright with other elements of your rig A quick flip of the switch here and the STRATEGY is tuned to your playing style or other aspects of your rig NORMAL features a rounder warmer Tone that is perfect for old school sounds and classic pas sive Basses This setting may also...

Страница 12: ...rol 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 directions are affected because of its broader band nature Twelve o clock NOON on the BASS con trol delivers a basically flat response no boost no cut As the BASS control is increased past 12 00 NOON it produces a 6db per octave boost in gain starting at the ce...

Страница 13: ...g It s no wonder many first time STRATEGY players make the comment that just these three controls even set at noon combined with the GAIN create the best tone they have ever heard NOTE As with the BASS control may we remind you that a control of this type with its increased power should be used with finesse in the TREBLE s case almost more so because higher frequencies seem louder to the ear and a...

Страница 14: ...located directly below the switch NOTE A quick word of caution is in order here The 9 Band EQ while easy to dial understand and ap ply can also be a dangerous sonic tool in the wrong hands We make this plea for your benefit and that of your audiences Use the 9 Band EQ with taste a musi cal ear and a tempered hand It is easy to Over EQ your sound with this kind of shaping power at your disposal Mak...

Страница 15: ... STRATEGY can in the FULL power setting HALF PWR utilizes four of the eight KT 88s to provide approximately 250 watts of sweet tube power This option has a less shim mering top end warmer attack and a little less emphasis on midrange punch HALF can be pushed into a furry clip in medium size venues for added Rock attitude or for an old school R B sound that can meet lower to medium headroom require...

Страница 16: ... subs employed POST gives you the entire preamp signal including INPUT SELECT Tone Controls the VOICE Mode selection and processing in the FX Loop POST is appropriate for recording situations where you want to capture the closest thing to what you are hearing when you play or live situations where the sound engineer requests your stage sound as a Direct feed to the front of house NOTE The D I OUTP...

Страница 17: ...arranty and put you at risk of damaging your amplifier and increasing your risk of electrical shock NOTE COLD START PROCEDURE When powering up your STRATEGY from cold ALWAYS follow this Start Up Procedure We have found the currently available KT 88s to require substantially more time than 6L6s or EL34s to warm up to full operating temperature If you hit them with high voltage sooner than three min...

Страница 18: ...es or a hour or so If you know you won t resume using the amplifier within a reasonably short time go ahead and turn the POWER switch off and save the electricity and your tubes Just be sure to follow the Cold Start procedure every time you wish to play It will save your Tone and your money NOTE IMPORTANT Do Not flip the STANDBY SWITCH in and out of STANDBY mode on and off while the amplifier is b...

Страница 19: ...of KT 88 power tubes creates potential for expensive repair bills and premature tube failures with no speaker load connected Never play loud or long if you hear no sound from your amp and always check the speaker connection first in any no sound situation NOTE Remember the Front Panel MUTE LED Indicator will illuminate as a safeguard against a no load condition when there is no speaker jack connec...

Страница 20: ...ilenced but the signal at the TUNER jack on the Footswitch will still be active so you can tune your instrument silently without having to run a cable back to your amplifier The VOICE button allows you to toggle the VOICE feature from Mode position 1 2 4 and 5 back to the Bypassed Flat setting of Mode 3 The female 8 Pin DIN receptacle on the Rear Panel just to the right of the EXTERNAL SWITCH JACK...

Страница 21: ...NCE MATCHING AND HOOK UP GUIDE toward the end of this manual MULTI WATT and SPEAKER OUTPUT CHOICES NOTE When switching between LOW HALF and FULL POWER of the STRATEGY s MULTI WATT options the impedance chang es slightly at the SPEAKER OUTPUT jacks While you can t really damage the amplifier with an impedance mismatch the sound and feel of the amp can be either optimized or compromised sometimes pu...

Страница 22: ...r load is present by confirming the connection at your cabinet AND the amp NOTE When there is nothing plugged into the SPEAKER OUTPUTS the front panel MUTE LED will be ON This is an indicator that there is No Load connected NOTE IMPORTANT MAKE SUREYOU HAVE A SPEAKER CONNECTED TO THE SPEAKER OUTPUT JACKS AT ALL TIMES NOTE IMPORTANT NEVER UNPLUG THE SPEAKER LOAD Cabinet WHILE THE AMPLIFIER IS IN USE...

Страница 23: ...though usually very sparingly There is no right way to apply compression or the other effects mentioned above so where you place them in your signal path is up to you Typically though the devices mentioned above sound better and are more widely usable when used on the Front End and not in the LOOP The FX LOOP is a junction point between the end of the preamp and the driver stage to the power secti...

Страница 24: ... SLAVE captures the entire sound of the amplifier from the SPEAKER OUTPUT jacks and is padded down to create an optimum signal level for insertion into the INPUT of other Power Amps This allows additional STRATEGY slave amps to be used as support power for larger Concert venues by connecting to their FX LOOP RETURN and using only the power section leaving you with just one preamp to navigate The S...

Страница 25: ...PAGE 20 NOTES ...

Страница 26: ...CE MASTER 3 2 4 5 1 NORMAL B R I G H T A C T I V E Eight 88 MUTE SIL REC P L A Y SAMPLE 4 Rock Growl INPUT POWER ON ON STANDBY D I LEVEL SOLO EQ 0 EQ IN EQ FS HALF FULL PWR LOW PWR 33Hz 80 150 300 600 900 2K 5K 8K D I PRE POST GAIN BASS MID TREBLE VOICE MASTER 3 2 4 5 1 NORMAL B R I G H T A C T I V E Eight 88 MUTE SIL REC P L A Y SAMPLE 5 FatThumb INPUT POWER ON ON STANDBY D I LEVEL SOLO EQ 0 EQ I...

Страница 27: ...0 600 900 2K 5K 8K D I PRE POST GAIN BASS MID TREBLE VOICE MASTER 3 2 4 5 1 VINTAGE N O R M A L A C T I V E Eight 88 INPUT POWER ON ON STANDBY D I LEVEL SOLO EQ 0 EQ IN EQ FS PLAY MUTE HALF FULL PWR LOW PWR 33Hz 80 150 300 600 900 2K 5K 8K D I PRE POST GAIN BASS MID TREBLE VOICE MASTER 3 2 4 5 1 VINTAGE N O R M A L A C T I V E Eight 88 INPUT POWER ON ON STANDBY D I LEVEL SOLO EQ 0 EQ IN EQ FS PLAY...

Страница 28: ...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 revealed a far greater variation in plate current for any given bias voltage compared to 6L6s And with the 88 s greater size and capacity the current draw varied from 15mA milli amperes to 50 mA wherea...

Страница 29: ...top Tube Deck and consists of the following steps SET BIAS For Non Technicians 1 Set both BIAS SWITCHES located on the upper Rear Tube Deck to OPERATE Make sure the amp is set to FULL POWER setting the Bias while in HALF POWER will give an incorrect measurement 2 Follow the Cold Start Procedure under POWER in the Front Panel Section of this manual and Switch the PRODIGY to STAND BY ON after three ...

Страница 30: ...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 created 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 ca...

Страница 31: ...ive 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 load with multiple speakers The importance of this is more evident when you have more than one cabinet to connect to your amplifier This is when you need to figure out the loads and how to wire them ...

Страница 32: ...SCHEMES 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 Partial back view of amplifier 8 OHM 4 OHM 4 OHM Partial back view of amplifier 8 Ohm Cabinet 4 Ohm Cabinet 8 Ohm Cabinet ...

Страница 33: ...back 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 Ohm 16 Ohm 16 Ohm Cabinet 16 Ohm Cabinet 9 4 OHM 4 OHM 7 WIRING SCHEMES Amplifier to Speaker Cabinets CORRECT MATCH CORRECT MATCH CORRECT MATCH ...

Страница 34: ...Ohm 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 of amp PARALLEL BOX 8 Ohm 16 Ohm 16 Ohm WIRING SCHEMES Amplifier to Speaker Cabinets CORRECT MATCH SAFE MISMATCH ...

Страница 35: ...net 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 Cabinet PARALLEL BOX 8 Ohm 16 Ohm 16 Ohm 16 Ohm Cabinet SAFE MISMATCH 14 ...

Страница 36: ... 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 within their six month warranty period we will happily send you a replacement Just note the color designation on the tube label so that we can send you the appropriate match DIAGNOSING PRE AMP TUBE P...

Страница 37: ...d 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 result from your substitutions it may be possible that you have more than one problematic tube Though rare this does happen and though it makes the troubleshooting process a little more intimidating...

Страница 38: ...ORE CHANGING TUBES FLIP POWER STANDBY SWITCH TO OFF INPUT JACK 12AX7 V3 12AX7 V2 12AX7 V1 KT 88 V4 KT 88 V5 KT 88 V6 KT 88 V7 KT 88 V8 KT 88 V9 KT 88 V10 KT 88 V11 FRONT OF CHASSIS OPERATE SET BIAS TUBE REPLACEMENT Bass Strategy Eight 88 V1A 2nd Gain Stage V1B 1st Gain Stage V2A B Driver Phase Inverter V3A B Driver 2nd Stages PREAMP TUBES LOW V4 V8 HALF V4 V5 V8 V9 FULL V4 V11 POWER TUBES ...

Страница 39: ...e order Be sure to reinstall the LED connector in the same position Installing it incorrectly may damage the display LEDs Use caution when reinstalling the top two screws on each side of the lid DO NOT force the screws in MAINS FUSE EXT SWITCHING LOOP EXT SWITCH HAND BUILT IN PETALUMA CALIFORNIA U S A TUBE GUIDE 3x12AX7 8xKT 88 BASS STRATEGY VACUUM TUBE AMPLIFIER FOOT SWITCH USE WITH TWO 8Ω CABS 4...

Страница 40: ...Y VACUUM TUBE AMPLIFIER FOOT SWITCH USE WITH TWO 8Ω CABS 4 OHM 4 OHM 8 OHM 2 OHM 2 OHM D I OUT MUTE SOLO VOICE EQ SLAVE LEVEL RETURN SEND TUNER SLAVE POWER ON ON STANDBY D I LEVEL SOLO EQ 0 EQ IN EQ FS HALF FULL PWR LOW PWR 33Hz 80 150 300 600 900 2K 5K 8K D I PRE POST CAUTION WARNING D I LIFT GROUND PATENTED 6 724 897 h 10 A SLO BLO 120 V 60 Hz 10 A USE WITH TWO 4Ω CABS GAIN BASS MID TREBLE VOICE...

Страница 41: ... ...

Страница 42: ...13 12 10 ...

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