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USA / Canada

IMPORTANT SAFETY INSTRUCTIONS

1.  Read these instructions.
2.  Keep these instructions.
3.  Heed all warnings.
4.  Follow all instructions.
5.  Do not use this apparatus near water.
6.  Clean only with dry cloth.
7.  Do not block any ventilation openings. 
8.  Install in accordance with the manufacturer’s instructions.
9.   Do not install near any heat sources such as radiators, heat registers, stoves, or 

other apparatus (including amplifiers) that produce heat.

10.  Do not defeat the safety purpose of the polarized or grounding-type plug. A 

polarized plug has two blades with one wider than the other. A grounding type 

plug has two blades and a third grounding prong. The wide blade or the third 

prong are provided for your safety. If the provided plug does not fit into your outlet, 

consult an electrician for replacement of the obsolete outlet.

11.  Protect the power cord from being walked on or pinched particularly at plugs, 

convenience receptacles, and the point where they exit from the apparatus.

12. Only use attachments/accessories specified by the manufacturer.
13.  Unplug this apparatus during lightning storms or when unused for long periods of 

time.

14.  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 apparatus, the 

apparatus has been exposed to rain or moisture, does not operate normally, or 

has been dropped.

“TO COMPLETELY DISCONNECT THIS APPARATUS FROM THE AC MAINS, 
DISCONNECT THE POWER SUPPLY CORD PLUG FROM THE AC RECEPTACLE”.
“WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT 
EXPOSE THIS APPARATUS TO RAIN OR MOISTURE AND OBJECTS FILLED WITH 
LIQUIDS, SUCH AS VASES, SHOULD NOT BE PLACED ON THIS APPARATUS”.

This symbol is intended to alert the user to the presence of important operation 

and  maintenance  (servicing)  instructions  in  the  literature  accompanying  the 

appliance.

This symbol is intended to alert the user to the presence of uninsulated 

“dangerous voltage” within the product’s enclosure that may be of sufficient 

magnitude to constitute a risk of electric shock to persons.

Summary of Contents for JJN-20RH MkII

Page 1: ... www blackstaramps com Whilst the information contained herein is correct at the time of publication due to our policy of constant improvement and development Blackstar Amplification Ltd reserves the right to alter specifications without prior notice Designed and Engineered by Blackstar Amplification UK 126404M 1 02 19 JJN 20RH MkII ...

Page 2: ...pparatus 12 Only use attachments accessories specified by the manufacturer 13 Unplug this apparatus during lightning storms or when unused for long periods of time 14 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 apparatus th...

Page 3: ...e unused for long periods of time Before the unit is switched on the loudspeaker should be connected as described in the handbook using the lead recommended by the manufacturer Always replace damaged fuses with the correct rating and type Never disconnect the protective mains earth connection High loudspeaker levels can cause permanent hearing damage You should therefore avoid the direct vicinity ...

Page 4: ...esponsive chime with looser bottom for the British tone that can be pushed into a midrange overdrive when driven hard The Voice setting can also be selected via footswitch This amplifier also has two voices on the Overdrive Channel providing a broad palette of overdriven tones As with the Clean Channel each of these voices can also be selected by footswitch The Overdrive voices are characterised b...

Page 5: ...ic but hot rodded overdrive with medium power amp damping With the red LED lit the overdrive sound has a more modern voicing that includes a strong mid emphasised pre overdrive boost as well as a looser more aggressive sound due to reduced power amp damping 8 OD Volume This control adjusts the overall volume of the OD Channel Turning it clockwise increases the volume 9 Bass The Bass control adjust...

Page 6: ...cified on the rear panel Never use a fuse of the incorrect value or attempt to bypass it English English 4 Speaker Outputs The output marked 1x16 Ohm is for the connection of a single 16 Ohm extension speaker cabinet The outputs marked 1x8 Ohm or 2x16 Ohm are for the connection of either a single 8 Ohm extension cabinet or two 16 Ohm cabinets 1x16 Ohm output 1x8 Ohm or 2x16 Ohm outputs Internal 16...

Page 7: ...s set EXTERNAL SWITCHING This can also be used by people who wish to control the main features of the amp using an external switching device that connects via the TRS connection of the socket The following external conditions will switch the channels and voices as follows TIP RING CHANNEL VOICE Closed Closed Clean Voice 1 Closed Open Clean Voice 2 Open Closed Overdrive Voice 1 Open Open Overdrive ...

Page 8: ...15 14 Technical Specification JJN 20RH MkII Power RMS 20 Watts Valves 2 x EL84 2 x ECC83 Weight kg 9 6 Dimensions mm 473 x 244 x 222 Footswitch FS 16 included English English ...

Page 9: ...Japanese Japanese JJN 20RH MkII Front Panel JJN 20RH MkII Rear Panel 20 2W 20W INPUT TONE CLEAN VOLUME 10 0 VOICE 10 0 10 0 BLUES POWER SELECT VOICE VOLUME OVERDRIVE GAIN 10 0 10 0 10 0 10 0 10 0 OD EQUALISATION ISF TREBLE MIDDLE BASS LEVEL REVERB 10 0 VOLUME MASTER 10 0 POWER ON ...

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