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Questions & Answers

FAQ

What does the ISF control feature do in the Blackstar Series One 45 45W 2 Channel 2x12 Tube Guitar Combo Amplifier?

The patented ISF control allows you to fine-tune your sound. It works with the Bass, Middle, and Treble controls to offer infinite sound possibilities, allowing you to design your own sound and find the sound in your head.

What is the purpose of the DPR system in this amplifier?

The DPR system allows you to vary the amplifier output down to 10% of its rated power without any loss in tone or valve reliability. This ensures pure valve output distortion and compression at any volume.

What is the benefit of the MIDI switching feature?

The MIDI switching feature allows for seamless channel selection via MIDI Program Change messages. This feature, coupled with the amplifier's series effects loop, provides the possibility to access a vast number of tonal combinations.

What makes the construction of the Blackstar Series One 45 45W 2 Channel 2x12 Tube Guitar Combo Amplifier durable?

The amplifier is constructed with an 18mm finger-jointed birch ply cabinet and heavy gauge wiring, designed to last a lifetime. Its chassis is made of seam-welded 1.6mm steel, ensuring mechanical integrity.

What is the purpose of the effects loop feature?

The effects loop feature allows you to connect effects pedals or other professional equipment using the return and send connections. The Effects Loop Level switch sets the effects loop to either +4dBV/-10dBV, enabling use with either professional equipment or guitar level effects.

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TRUSTED PROTECTION PLANS, EXCEPTIONAL SERVICE.

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Accidents happen where life happens. Protect your favorite Adorama products and purchase a protection plan to stay covered from accidental damage, mechanical or electrical failure, and more.

Repair or Replacement

Repair or Replacement

If we can’t fix it, we’ll replace it at no additional cost.

Accidental Damage

Accidental Damage

Protect your product from drops, spills, and more.

Peace of Mind

Peace of Mind

Enjoy your gear without fear. We have you covered!

Malfunction Protection

Malfunction Protection

When regular use of your product over time results in mechanical or electrical failure.

Zero Deductible

Zero Deductible

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Customer-Focused Support

Customer-Focused Support

Our claims process is simple & easy and our customer service team is happy to help.

Adorama Protect powered by Extend is available for purchase to customers in the United States. Not available for purchase Internationally or in U.S. Territories.

Blackstar SI 45 Specifications

  • Power (RMS)

    45 Watts

  • Valves

    2 x EL34, 3 x ECC83, 1 x ECC82

  • Foot switch

    FS-2 supplied

  • Number of Channels

    2

  • Dimensions

    27.95 x 21.69 x 11.89" / 710 x 551 x 302mm

  • Weight

    76.5lbs / 34.7kg

  • UPC Code

    845644000234

0 Accessories for Blackstar Series One 45 45W 2 Channel 2x12" Tube Guitar Combo Amplifier, 2x EL34, 3x ECC83, 1x ECC82 Valves

About Blackstar SI 45

The Blackstar Series One 45 45W 2 channel 2x12" tube guitar combo amplifier delivers both Class A style tones with a bell-like ring and classic push-pull crunch depending on the mode selected. The patented ISF control removes the limitations of traditional designs allowing you to tune the tone to exactly the sound you are looking for. DPR can reduce the power down to 4.5W and MIDI switching and a series effects loop make this the ultimate pro's combo.

45 Watt, 1 ECC82, 3x ECC83, 2xEL34
The Series One 45 is an innovate combo that features 2xEL34 valves that combine with its Celestion Vintage 30 speakers to create awesome tone. By switching both preamplifier and power amplifier parameters the Series One 45 delivers both Class A style tones with a bell-like ring and classic push-pull crunch depending on the mode selected.

ISF Control
The patented ISF control works with the Bass, Middle and Treble controls to give you access to infinite new sound possibilities from the USA to the UK and everywhere in-between. This fully interactive control allows you to infinitely adjust the response of the tone control network between any of the traditional voicing's. In this way you can design your own sound and truly find the sound in your head.

DPR Control
The DPR system allows you to vary the amplifier output down to 10% of its rated power without any loss in tone or valve reliability. Pure valve output distortion and compression at any volume - a dream come true.

MIDI Switching
The Series One offers the ability to control channel selection via MIDI Program Change messages and interfacing with most MIDI controllers is a straight forward process. The Series One can be placed in a MIDI chain allowing you to simultaneously select a channel on the amplifier and change the patch on a MIDI effects processor connected to the effects loop. There are 128 available Program Changes, giving you the possibility to access a vast number of tonal combinations.

Speaker Emulated Output
All Series One amplifiers have a state-of-the-art speaker emulator with balanced and unbalanced outputs via XLR and standard jack connectors respectively. The Blackstar speaker emulator is a complex multi-stage filter which takes the preamplifier signal and then introduces the important characteristics of a valve power amp, guitar loudspeaker and cabinet.

Solid Construction
All Series One amplifiers have plated through double sided PCBs for the increased mechanical integrity this construction affords. Designed to last a lifetime, Series One cabinets have an 18mm finger-jointed birch ply cabinet and heavy gauge wiring. The chassis, for mechanical integrity, are seam welded 1.6mm steel.

2 x 12inch Celestion Speakers
The Series One 45 features a duo of 12inch Celestion Vintage 30 speakers.

Series Effects Loop
The amp features an effects loop to allow you to connect effects pedals or other professional equipment using the return and send connections. The Effects Loop Level switch sets the effects loop to either +4dBV/-10dBV, which enables you to use it with either professional equipment (+4dBV setting), or with guitar level effects such as effects pedals (-10dBV setting).