FireStone Preamp and Big Joe IV review

Soundcards and Speakers 106 Page 4 of 8 Published by

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Bundle: Big Joe Mono Blocks

Lets rip into the next box and see what Firestone audio sent next.  We have a pair of Class D Mono Block power amplifiers.

Firestone Audio Mass Preamp and Big Joe IV Mono Blocks

The Big Joe IV bundle Includes:

  • 2 X Big Joe IV Class D Mono Block Amplifiers
  • 2 X Power Adapters
  • 2 Power Cords
  • Instructions
  • Warranty card

A Closer Look: Big Joe IV Mono Blocks

For those unfamiliar with mono blocks, they are separate mono amplifiers in which one amp is used for each speaker channel.  Mono blocks are popular in the tube based crowds but they seem to be making a comeback for the solid state fans also. 

These units are power amplifiers; they have no input or output level control and must be used with the Mass Preamp or other device that provides level control.  Lets have a look at the Big Joe IVs.

Front

Firestone Audio Mass Preamp and Big Joe IV Mono Blocks

The front panels of the Big Joe IV follow very modern and clean design ideas.  The lines are clean and you have a simple LED indicator for power.  We can see the power ratings on the front to remind the end user of how much actual audio muscle they have in these small units.

Rear

Firestone Audio Mass Preamp and Big Joe IV Mono Blocks

The rear of the units is equally clean, offering simple mono RCA input and banana jack outputs for your speakers.  There is also the master switch for the power supply with the DC power input right beside the switch.

Big Joe PSUs

Firestone Audio Mass Preamp and Big Joe IV Mono Blocks

The external PSU that are bundled with the BJ IVs are big and quite heavy duty in comparison to other power adapters we have seen for desktop amplifiers.  The BJ IVs are running on 30VDC for each unit so that is a bit of power but considering the power they push out this seems reasonable.

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