Introduction
Ref Four - Making the heritage appear clearly.
Overdimensioned products can be applied in a wide range of configura�ons, even those not
intended at first. We have always taken great pride in me�culous R&D to provide premium products, but it has also been a misconcep�on
that B2 audio products might not have been designed with SQ as a cornerstone.
The Ref Four is a statement to show the contrary. It took numerous prototypes and revisions to ensure it would be catering to the purists.
Thus the profile of the amp is also more conserva�ve, but that can’t be said for what’s inside. An amp witout compromise with only dynamics,
headroom and SQ in mind. Reveered component manufacturers such as Mcap, Nichicon, Burr Brown & IR have been used to fullfil the SQ.
To obtain the full poten�al of the amplifier and to minimize failure, it is strongly recommended & necessary
to upgrade the stock electrical system. Ensure the system is in accordance with the full performance of the amplifier, it is therefore essen�al
to read through the en�re manual.
For con�nious news & updates, feel free to visit us at:
www.facebook.com/b2audio / www.b2audio.com / www.youtube.com/b2audio / instagram: b2_audio / twi�er: @b2_audio
Better Bass
Better Bass is our philosophy of adding something extra.
Keep in mind that continious exposure to SPL above 100 dB can seriously
damage your hearing. Today’s high power auto sound systems can easily
produce SPL over 140 dB. Enjoy your music with sense.
Table of contents
Design features
3
Panel layout
4 - 5
Installation
6
*Preparations
6
*Power
connectors
6
*remote & RCA input
6
2
speaker
wiring
7
*preparations
7
*stereo
wiring
8
*bridged
wiring
8
troubleshooting
9
warranty information
10
