Nembrini Audio MRH159 User manual
MRH159 BROWN SOUND GUITAR AMPLIFIER
MRH159 BROWN SOUND GUITAR AMPLIFIER
Congratulations on choosing our Mrh159 Brown Sound Guitar Amplier.
Modeled on a Marshall* Super Lead 1959 100W head guitar amplier with modication to achieve
the legendary Eddie Van Halen’s BROWN SOUND.
Changes on the stock amplier:
- Variac Variable Transformer to reduce the main voltage to 90V
- EL34 tubes changed with 6CA7 Fat Bottle
- Middle tone stack potentiometer changed to 50K ohm
- Fat cap 25uF on V2 tube
The main part of the BROWN SOUND is the cabinet loaded with JBL* D120
on top and Celestion* G12M 25W Greenback on bottom blended with Shure*
SM57 microphone.
MRH159 BROWN SOUND GUITAR AMPLIFIER
Front Panel
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The front panel contains the main controls of the Mrh159 Guitar Amplier plugin:
1 - Power On/Off Switch: bypass the plugin to compare your processed and unprocessed signal.
2 - Presence: This control operates in the plugin’s power section and adds high frequencies to your sound by altering
the power amplier’s negative feedback. Turning this control clockwise adds more edge and ‘sparkle’ to your sound,
making it crisper and more cutting.
3 - Bass: This adjusts the bottom end, turning it clockwise increases the amount of low frequencies.
4 - Middle: This adjusts the level of those all important mid range frequencies. Turning it clockwise increases he mids
and fattens your sound, giving it more punch. Turning it counterclockwise reduces the mids, producing a more ‘scoo-
ped’ tone.
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MRH159 BROWN SOUND GUITAR AMPLIFIER
5 - Treble: This adjusts the top end. Turning it clockwise increases the amount of high frequencies (treble) present in
the sound, making your guitar tone brighter.
6 - Volume I: This controls the overall output level of Channel I, turning it clockwise increases the volume. This chan-
nel is voiced for a higher treble response than Channel II.
7 - Volume II: This controls the overall output level of Channel II, turning it clockwise increases the volume level.
8 - Inputs: Channel input selection, the ‘HIGH’(top) input will give you more gain and output volume whereas the
‘LOW’(bottom) input will be quieter and have more clean headroom.
LINK switch simulates the I and II channels joining in a way to use both for blending them.
MRH159 BROWN SOUND GUITAR AMPLIFIER
1 - Brown Sound Mods On/Off: Engage the plugin’s modify on the “original” amplier plugin to achieve
the BROWN SOUND.
2 - Cabinet - Impulse Loader button: Opens and closes the Cabinet - Impulse Loader panel.
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MRH159 BROWN SOUND GUITAR AMPLIFIER
Cabinet - Impulse Loader panel
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1 - Recording Chain Mode: these three buttons switch between the included cabinet/recording
chain emulation, the Impulse Loader and the complete bypass of the entire cabinet/recording chain
section. The Cleaner (2), Noise Gate (3) and Levels (4) sections are always active in all the three
Cabinet Modes.
MRH159 BROWN SOUND GUITAR AMPLIFIER
2 - Cleaner: this lter section has been added to our Mrh159 BROWN SOUND to clear your tone
Rumbling: reduces the low frequency content
Harsh: reduces the high frequency content
3 - Noise Gate: allows you to eliminate the noise produced by the large amount of gain
Power: activates the Noise Gate circuit
Threshold: denes the level where the gate is activated
Range: selects the quantity of noise reduction
4 - Levels: this section lets you to control the level before the plugin process and after all the processing
Input : adjust the input level from minus innite to +12db
Output : adjust the output level from minus innite to +12db
5 - Fix button: by pressing this button your input level remains the same when you change presets
MRH159 BROWN SOUND GUITAR AMPLIFIER
Cabinet MODE
1 - Cabinet: you can choose between six selected cabinet emulations:
1- MRH 4x12 BROWN: based on Marshall* 1960A 4×12 with on top 2 x JBL* D120 and
on bottom 2 x Celestion* G12 25W Greenback speakers
2- MB RECT 4x12 V30: based on Mesa Boogie* Rectier 4x12 with Celestion* Vintage 30 speakers
3- ORANGE 4x12 V30: based on Orange* 4×12 with Celestion Vintage 30 speakers
4- SLD 4x12 LEGEND: based on Soldano* 412B 4x12 with Eminence* Legend V12s
5- BG 2x12 V30: based on Bogner* 2x12 with Celestion Vintage 30 speakers
6- TWEED 4x10 P10Q: based on Fender* Tweed Bassman 4x10 with Jensen P10Q speakers
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MRH159 BROWN SOUND GUITAR AMPLIFIER
2 - Mic 1 and Mic 2 settings: You can use 2 virtual microphones for your amp recording chain and select between 4
different models, select between On or Off Axis postions, change the Position and Distance.
The emulated microphone are:
1 - DYNAMIC 57: based on popular Shure* SM-57 dynamic microphone
2 - RIBBON 121: based on modern Royer Labs* R-121 ribbon microphone
3 - CONDENSER 414: based on classic AKG* C 414 condenser microphone
4 - DYNAMIC 421: based on vintage Sennheiser* MD-421 dynamic microphone
When is selected MRH 4x12 BROWN cabinet, Mic1 and Mic2 settings are related to Celestion* G12 Greenback and
JBL* D120 respectively.
3 - Mixer: These 2 faders control the volume of the 2 microphones in front of the guitar and the studio reverb.
Each channel has a pan control for stereo image (active only in stereo and mono to stereo instances), solo, mute and
phase inversion button.
MRH159 BROWN SOUND GUITAR AMPLIFIER
STUDIO REVERB
1 - PAN: This controls the distribution of the reverb signal into a new stereo sound eld.
2 - DECAY: This controls adjust the time required for the reections (reverberation) to die away.
3 - LOW CUT: This controls the frequency of the reverb high pass lter.
4 - HIGH CUT: This controls the frequency of the reverb low pass lter.
5 - STUDIO REV: This controls the overall output gain of the studio reverb, turning it clockwise increases
the gain level.
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