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English

English

Front Panel

1. Input

Plug your guitar in here. Always use a good quality screened guitar lead.

Clean Channel 

2. Clean Volume 

This controls the volume of the Clean Channel. Turning it clockwise increases 

the volume. At extreme clockwise settings the preamplifer will start to overdrive, 

particularly in the ‘British’ mode.

3. Clean Voice Switch 

This switch selects between the two clean voices. With the switch out, the ‘American’ 

setting is very clean and bright but with a solid and tight low end. When this Voice is 

selected, the Voice LED is unlit. With the switch in, the ‘British’ setting has a looser 

bass response with warmer mid-range and is very sensitive to the output level of the 

guitar and the player’s dynamics. When this Voice is selected, the green Voice LED is 

lit. The EQ voicing and valve gain structure is completely reconfigured between each 

voice.

4. Tone

This  is  a  dual  control  that  effectively  adjusts  the  treble  and  bass  for  the  Clean 

Channel at the same time. Fully counter clockwise (CCW) will be darker and bassy 

in  character.  Rotating  the  control  clockwise  (CW)  will  progressively  brighten  the 

sound and thin the bass.

OD (Overdrive) Channel

5. OD Select Switch 

Press this switch to select the OD Channel. When the yellow LED is on, the OD 

Channel is selected. When the yellow LED is off, the Clean Channel is selected.

6. OD Gain

The OD Gain control adjusts the amount of this Channel’s overdrive or distortion. 

Low settings (anti-clockwise) will deliver a clean sound on the edge of break-up. 

As the Gain control is increased clockwise the sound will become more overdriven, 

moving through crunch tones until, at its maximum position, a full distorted tone is 

reached.

7. OD Voice Switch

This is a momentary switch that selects between the two voices of the OD Channel. 

When the small red LED is unlit, this channel has a ‘classic’ 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 adjusts the amount of low-end frequencies in your tone. This amp 

has an advanced tone shaping circuit which allows the tone to be varied from tight 

and cutting when counter clockwise, to warm and thumping when fully clockwise. 

10. Middle 

The Middle control adjusts the amount of middle frequencies in your tone. The middle 

frequencies are particularly important in setting the amount of ‘body’ your tone has. 

With the Middle control set to its minimum position (fully counter clockwise) the sound 

will be aggressive and scooped, a tone ideal for aggressive rhythm playing. As the 

Middle control is increased (clockwise) the amount of ‘body’ is increased, which is 

more suitable for sustained lead guitar tones.

11. Treble 

The Treble control allows exact adjustment of the treble frequencies within the 

sound. At low settings (counter clockwise) the sound will be warm and darker in 

character.  As  the  Treble  control  is  increased  (clockwise)  the  sound  will  become 

brighter. At the maximum settings the sound will be aggressive and cutting.

12. ISF (Infinite Shape Feature) 

The  patented  ISF  control  works  in  conjunction  with 

the Bass, Middle and Treble controls. It allows you to 

choose the exact tonal signature you prefer. Fully counter 

clockwise has a more American characteristic with a 

tight bottom-end and more aggressive middle, and fully 

clockwise has a British characteristic which is more 

‘woody’ and less aggressive.
Unlike conventional ‘contour’ controls and parametric equalisation systems, the Bass, 

Middle and Treble controls remain interactive with each other just like in a traditional 

guitar amplifier tone stack. This leads to a very familiar, musical response. 

USA

UK

Summary of Contents for HT-20R MkII

Page 1: ...s 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 126400M 1 01 19 HT 5R MkII HT 5RH MkII HT 20R MkII HT 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: ...tone and a highly responsive 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 These amplifiers also have two voices on the Overdrive Channel which share a common EQ section These two voices provide a broad palette of overdriven tones As with the Clean Channel each of these voices can al...

Page 5: ...ut 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 adjusts th...

Page 6: ... is specified 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 Inte...

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: ...S 5 Watts Valves 1 x 12BH7 1 x ECC83 Weight kg TBC Dimensions mm 396 x 217 5 x 220 Footswitch FS 16 included HT 20R MkII Power RMS 20 Watts Valves 2 x EL84 2 x ECC83 Weight kg TBC Dimensions mm 513 x 487 x 270 Footswitch FS 16 included Speaker Custom Designed 12 HT 20RH MkII Power RMS 20 Watts Valves 2 x EL84 2 x ECC83 Weight kg TBC Dimensions mm 473 x 244 x 222 Footswitch FS 16 included English E...

Page 9: ...ULATED OUTPUT LINE OUT PHONES D I OUTPUT 4x12 1x12 126673M VA 2 CONNECT SPEAKERS BEFORE USE CLASS 2 WIRING OUTPUT 5 WATTS RMS Español Español Français Français Deutsch Deutsch English English HT 5R MkII Front Panel HT 5R MkII Rear Panel HT 5RH MkII Front Panel HT 5RH MkII Rear Panel 中文 中文 Japanese Japanese ...

Page 10: ...85 84 Español Español Français Français Deutsch Deutsch English English HT 20R MkII Front Panel HT 20R MkII Rear Panel HT 20RH MkII Front Panel HT 20RH MkII Rear Panel 中文 中文 Japanese Japanese ...

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