Mesa Rosette 300 Two:Eight Скачать руководство пользователя страница 12

better scaling for a wider variety of instruments, pickup levels, player styles and/or techniques, and effects, which improves signal to 
extraneous noise performance, though certain individual circumstances might dictate otherwise.

  BASS CONTROLS  

  This active EQ control is responsible for the amount of low frequencies present in the signal, relative to 

the rest of the spectrum. Low frequencies (150Hz and below) are responsible for the bottom-end roundness, fullness and “feel” of 
the tone. These are active controls with boost and cut, the amount of boost proportional to the clockwise rotation to the right of “flat” 
(12:00 straight up) position, and the amount of cut proportional to the counter-clockwise rotation to the left of “flat” (12:00 straight 
up) position. As with everything related to EQ, generally, a little bit goes a long way. Use enough to get the job done and no more. 
Note that if you are experiencing low frequency woofiness, or tubbiness, try turning this control down a little bit. This is a shelving 
style filter. It will be helpful to first fine tune the response with the variable HI-PASS FILTER before using the BASS EQ control, as 
often a combination of the BASS EQ and HI-PASS FILTER is more effective than applying only one of these low frequency controls.

  LOW MID & HIGH MID CONTROLS  

  These Active EQ controls are responsible for the amount of LOW and HIGH 

MIDRANGE frequencies present in the signal, relative to the rest of the spectrum. Like all semi-parametric tone controls, they are 
comprised of the GAIN control that determines either a cut or a boost of the selected Frequency range from a 12:00 “flat” (neither cut 
or boost) setting, and a FREQUENCY control that allows selection of the frequency you wish to control within a wide and adjustable 
range. For thoroughness if not redundancy, let’s review the suggestions in the earlier HELPFUL HINTS section of this Manual to 
better understand the easiest way to use these powerful semi-parametric controls.

SUBTRACT FOR TONE! SETTING THE SWEEPABLE MIDS

Recording and live sound engineers have long known that, when searching for a great sound, removing what you don’t want works 
far better than boosting what you find pleasing to achieve a balanced sound. This method reduces noise floor, avoids clipping and 
produces better overall results than trying to boost frequencies. Don’t frustrate yourself by ignoring this time-proven Golden Rule of 
Audio and you will arrive at great Tone quickly and easily.

LOW MID BAND: With the BASS set at 10:00 and the TREBLE set at 11:00, set both LOW and HIGH MID FREQUENCY Controls 
all at NOON. Increase the LOW MID GAIN to 2:00 and sweep the LOW MID FREQUENCY back and forth from 12:00 until you hear 
a frequency you do not like and stop there. Then, reduce the LOW MID GAIN until you reach a desired blend, keeping in mind you 
do not want to remove too much of that frequency, or the sound will be unnatural.

HIGH MID BAND: Repeat the same procedure with the HIGH MID FREQUENCY Control; Increase the HIGH MID GAIN to 2:00, 
sweep the HIGH MID FREQUENCY back and forth from 12:00 until you hear a frequency you do not like and stop there. Then, reduce 
the HIGH MID GAIN until you reach a desired blend, keeping in mind not to remove too much of that frequency, or the sound will be 
unnatural. Usually a MID GAIN setting of 11:00, sometimes as low as 10:00, should remove enough of the unwanted frequencies. 
LOW MID FREQUENCY provides control over frequencies between 150Hz and 1800Hz and these regions are responsible for the 
“earthy” or “woody” character of the tone. HIGH MID FREQUENCY gives you a range of frequencies between 300Hz and 5000Hz to 
work with and these frequencies are responsible for the “attack” or “biting” character of the tone. These are Active controls with boost 
and cut controlled by the LOW MID GAIN and HIGH MID GAIN controls, the amount of boost proportional to the clockwise rotation 
to the right of “flat” (12:00 straight up) position and the amount of cut proportional to the counter-clockwise rotation to the left of “flat” 
(12:00 straight up) position.

NOTE: Keep in mind that with the GAIN control in the “flat” (12:00) position, there will be no difference heard when sweeping the 
corresponding FREQ control to that because there is no cut or boost being applied in that band.

This style of control is referred to as a peak-dip (or bell) style filter. Here in the Rosette, the pair that comprises the MID controls of-
fers accuracy and flexibility only found on fully professional recording or live sound mixing consoles. It may take a minute to become 
familiar with the level of control and power they provide in shaping your sound, but if you start with the basic procedure outlined above, 
you’ll be dialing in great tones for all your instruments with ease and confidence before you know it.

PAGE 8

Содержание Rosette 300 Two:Eight

Страница 1: ...Owner s Manual...

Страница 2: ...u are the new owner of an amp bred of fine heritage benefitting from the many pioneering and patented MESA circuits as well as fresh cutting edge research and development efforts leading to this new a...

Страница 3: ...________________ 10 LAYERED CHORUS REVERB PROGRAM_____________________________________________________ 10 ROOM HALL REVERB PROGRAMS_______________________________________________________ 10 11 EFFECTS...

Страница 4: ...atus which extend past the rear edge of its cabinet When Rack Mounting this unit proper ventilation space must be maintained Do Not cover or block Front and Rear and allow at least 2 of open breathing...

Страница 5: ...the accurate reproduction of that beauty While staying true to the concept of Do No Harm few products or companies seem to share this perspective forAcousticAmplification And when it comes to the ele...

Страница 6: ...s and can end at the Input Stage We re not about to let the latter happen on our watch Note that the lower Channel 2 may be used with a Microphone by using a standard Line Matching Transformer availab...

Страница 7: ...ot light indicating the AC MAINS Power has been switched on BLUE The on board Effects Suite includes three effects choices ROOM REVERB HALL REVERB and REVERB AND CHORUS These effects programs create m...

Страница 8: ...eeds your acoustic voice to live venues and recording applications with something as important as your music INSTANT GRATIFICATION The ROSETTE is a professional and comprehensive amplifier for acousti...

Страница 9: ...I PASS controls feedback by taming excess low frequency resonances and if your instrument is feeding back at a lower pitch increasing the HI PASS filter stands a very good chance of remov ing the offe...

Страница 10: ...nel The microphone preamp features a discrete low impedance balanced input amplifier which provides appropriate loading approx 3k ohms and gain to the microphone The MICROPHONE INPUT jack provides DIN...

Страница 11: ...ustic instrument and bass amplifiers within the past few years with a few notable exceptions This variable filter helps you coordinate and control the sub sonic harmonics generated by the acoustic cav...

Страница 12: ...than trying to boost frequencies Don t frustrate yourself by ignoring this time proven Golden Rule of Audio and you will arrive at great Tone quickly and easily LOW MID BAND With the BASS set at 10 0...

Страница 13: ...necessary to set the MIC GAIN or INSTRUMENT GAIN control a little lower and maybe increase the MASTER control a little to obtain a reasonable playing volume and avoid overdriving the input stage Simi...

Страница 14: ...to the generated reflections Because the time offsets are longer it s helpful not to use too much of this program in a mix especially with long reverb times and a high setting of parameter 2 s low pa...

Страница 15: ...t stage clipping It s acceptable for this amplifier to operate in output stage overdrive mode if that s the tone you re after with the LED flash ing roughly 25 of the time on Rear Panel Controls Featu...

Страница 16: ...help avoid accidental ear damage NOTE IMPORTANT It s advisable to use caution whenever sticking any sound source in or in close proximity to your ears as hearing damage is possible due to unintended...

Страница 17: ...still best to introduce the least possible cable capacitance in the FX LOOP to ensure the best performance and Tone AUX INPUT The Rosette provides a 1 4 6 5mm T R S AUX INPUT This Tip Ring Sleeve ster...

Страница 18: ...h allows you to best match whatever the requirements are of the equipment you are connecting the DI OUTPUTS of your amplifier to so set this switch according to those needs and you will always enjoy g...

Страница 19: ...REST AREA PAGE 15...

Страница 20: ...n turn the controls up 3 Defective speaker cable or cabinet test known good speaker cable and cabinet 4 Defective pickup or cable test with known good pickup and cable 5 There is indeed a problem with...

Страница 21: ...ck all wiring for missing grounding earthing pins have qualified electrician check building power wiring for missing ground earth connections and correct as necessary 4 Problem with wiring or a device...

Страница 22: ...Class D amplifier experience both in bass and acoustic amplifiers as well as in the touring pro audio world We have worked closely with the European engineering team on the development of these new po...

Страница 23: ...WM digital audio recorder but at a much higher frequency at 5 volts conventional computer logic level This PWM pulse train is level shifted by large solid state switching power transistors that operat...

Страница 24: ...RUS ROOM REVERB HALL REVERB LIMIT FX BYPASS PROTECT POWER LOW MID HIGH MID 300 TWO EIGHT ROSETTE PICKUP PHASE PICKUP INPUT PICKUP INPUT CH 1 CH 2 MIC INPUT PLAY MUTE CLIP IN OUT IN MIC PICKUP PHASE PL...

Страница 25: ...TWIST LIFT ADJUSTMENT Adjustment of the Twist Lift is as simple as turning the threaded stand on the bottom side of the cabinet counter clockwise to RAISE the amp or turning the threaded stand clockwi...

Страница 26: ...ones For this reason specifications and information in this manual are subject to change without notice SERVICE INFORMATION USA CANADA Customer Support For technical support troubleshooting tone ques...

Страница 27: ...ROSETTE 300 TWO EIGHT BLOCK DIAGRAM PAGE 23...

Страница 28: ...CONSUMPTION 250W MAINS FUSE INTERNAL T4A 250V h AMPLIFIER 44YV 100V 240VAC 50 60HZ INPUT POWER RATED POWER PICKUP PHASE PICKUP INPUT PICKUP INPUT CH 1 CH 2 MIC INPUT PLAY MUTE CLIP IN OUT IN MIC PICKU...

Страница 29: ......

Страница 30: ...18 02 13 MESA Boogie 1317 Ross Street Petaluma California 94954 USA Phn 707 778 6565 www mesaboogie com Fax 707 765 1503...

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