B2 Audio Zero Series 12K Watt 1 Ohm Monoblock Class-D Half Bridge Amplifier User Manual

Before installation, ensure that the power source is disconnected to prevent any electrical hazards.
Mount the Zero6 – Yggdrasill amplifier in a well-ventilated area to prevent overheating.

Connect the power terminals to the appropriate power source based on the gauge and fuse rating provided.

Settings

Adjust the input sensitivity according to your audio system’s requirements for optimal performance.
Configure the crossover settings based on your speaker configuration and desired sound output.

Troubleshooting

If you encounter any issues with the amplifier, refer to the troubleshooting section in the user manual for detailed steps to diagnose and resolve common problems.

INTRODUCTION

Welcome to the forefront of audio innovation with the B2 Audio Zero series. These amplifiers represent a significant advancement in the realm of high-performance audio, setting a new benchmark for precision, power, and reliability. At B2 Audio, we are committed to excellence. The Zero amplifiers embody this commitment, integrating state-of-the-art technology and superior engineering. The introduction of the Zero models spans more than 15 years, including legends such as the Zero.5, Zer07, Zer09 and most recently, the Zero 12. They all demonstrate our dedication to pushing the boundaries of high-powered amplifier design. These amplifiers are engineered to deliver unparalleled sound quality and dynamics, ensuring that every detail is reproduced with authority.

Yggdrasill

Yggdrasill is a central and deeply revered tree in Norse cosmology. Often referred to as the “World Tree” and sometimes the “Tree of Life,” it connects the nine worlds of Norse mythology, forming a cosmic structure that unites everything.
The Zero6 – Yggdrasill amplifier is designed to be the centrepiece of your audio system, capable of powering any B2 audio subwoofer with authority and precision.

To obtain the full potential of any amplifier & to minimise failure, it is advised to upgrade your stock electrical system.
Don’t take any shortcuts; a better Electrical system equals enhanced performance and stability.

Stay updated on B2 audio, follow us on social media & visit our website.
B2audio.com – B2audiousa.com – facebook.com/b2audio – Instagram.com/b2audiogram – youtube.com/b2audio – X:@b2_audio
At the heart of B2 Audio lies a relentless pursuit of excellence. We believe in doing things differently and pushing the boundaries of what’s possible.
Our talented team of audiophiles and industry enthusiasts is united by a passion for designing the best possible products—products that are more than just “good enough.”
Our unwavering dedication has allowed us to make our mark since our founding in 2008.
Our journey has been marked by numerous milestones and accolades, reflecting our commitment to pushing the envelope and setting new standards in the industry.
As we continue to grow and evolve, we remain dedicated to our mission of delivering exceptional audio products that inspire and delight.

Design Specifications

Model: zero 6 – yggdrasill
Circuit configuration: high-efficiency class D
Frequency response: 10 hz-300 Hz
Signal to Noise Ratio: >95 dB
Input sensitivity: 5 V-0.2 V
Crossover circuit: 24 dB/oct
Low pass crossover: 35 hz-250 Hz
Subsonic crossover: 10 Hz – 50 Hz
Damping factor: >400 level control
With clip: INCLUDED

Power terminal gauge: 3 x 0 gauge / 67 mm2
Fuse rating: 500 A
Dimensions metric: 545 x 220 x 65 mm

Imperial: 21.46” x 8.7“ x 2.55”

Continuous output power (RMS) @ 14.4V <1% THD

measured @ <1% thd (40 Hz) using audio precision

	12.6 v < 1% tHD	14.4 v < 1% THD	16 v < 1% thd
OUTPUT POWER @ 4 .0:	1500 W	2100 W	2300 w
OUTPUT POWER @ 2 .0:	2500 W	3800 W	4000 w
OUTPUT Power @ 1 .0:	4500 W	6200 W	6500 w

Dynamic rated power (music / Spl Burp)>10000 W @ 14 V

Descriptions of specifications

Full output power according to the spec is based on a sufficient electrical supply system. if your system is inadequate, the efficiency of the amplifier decreases, hurting the performance!

Operation below minimum impedance will stress the amplifier & void the warranty. Excessive heat will occur, causing the amplifier to go into thermal protection.
The circuit may sustain permanent damage, and protection lights won’t turn off or flash sequentially.
Operational voltage is from 9V to 17.5V

Protection may also be caused by the following

Input voltage from the headunit is too high/low / power supply voltage is too high/low.
speaker overload

short circuit
Full output power according to the spec is based on a sufficient electrical supply system.
If your system is inadequate, the efficiency of the amplifier decreases, hurting the performance!

MINIMUM BATTERY REQUIREMENTS AGM LITHIUM 6C
- Zero6 – Yggdrasill 4x 100 AH / 1250 CCA 80 AH
The list above describes the additional dedicated battery supply for the amplifier.

The OEM battery does not count as a part of it.

Panel Layout

POWER PROTECTION INDICATOR

Power LED, blue light shows correct operation, Protect LED, red light shows general malfunction, faulty connection or thermal protection.

INPUT

A minimum of 0.2V input signal is required for correct operation. (The other RCA is OUTPUT and shall not be connected as an input).

OUTPUT

RCA output signal for SLAVE or DAISY amplifiers.

The SLAVE / DAISY amplifier shall have the switch in the correct position.
connection or thermal protection.

GAIN

Adjusts signal input voltage from the input source to match the amplifier’s input stage.
0.2 V to 5 V is the operational voltage.
Voltages beyond this may cause errors or damage to the input section.

SUBSONIC

Variable subsonic setting from 10 Hz to 50 Hz.
It is highly recommended to set it according to the tuning of your subwoofer enclosure to avoid unnecessary strain to your sound system.

LPF (LOW PASS FILTER 35 HZ -250 HZ, 24 DB/OCT)

Adjusts the cutoff point for the low-pass crossover at the frequency chosen.

MASTER/ SLAVE / DAISY

Master & slave settings enable strapping of the amplifier with another identical amplifier to achieve twice the power. When set to master,this unit will send the signal to the slave unit, which will have the switch set to slave with the RCA connected to the input.
The Daisy setting will work as a daisy chain of subsequent amplifiers. In this configuration, each amplifier will work independently, but the signal input will be routed from the master amplifer’s output, making gain matching faster & easier.

GAIN DAISY

Fine-tuning of the master signal routed to the daisy amp.
While the ordinary gain on daisy amps are disabled, the Daisy amp is gain matched by the master, but if there’s a slight variance in signal up to +/- 5%, the Daisy gain can equalise it.

REMOTE

Remote level control with Clip LED reading.

SPEAKER REM CONNECTION

Loudspeaker output connection. The REM is the switched remote input from the source unit.

It needs to be connected for the amplifier to power on.

Power terminals

POWER TERMINAL

GND (GROUND CONNECTION)

Connects to the vehicle’s chassis. Keep as short as possible (< 20″ / 50 cm). Use a minimum OAWG cable for optimal operation.

+ 12V (POWER CONNECTION)

Connects to the positive terminal of the battery.
For specified performance, an OAWG cable is required.
Fuses shall be placed within 8″ / 20 cm of the battery.

CAUTION: CONNECT THE + 12V WIRE, KEEPING IN MIND THAT THIS WIRE MUST BE FUSED AT THE BATTERY AS WELL. ENSURE THE GROUND IS APPROPRIATE, THEN CONNECT IT TO THE AMPLIFIER.
CONNECT THE SWITCHED REMOTE. REATTACH THE NEGATIVE WIRE (GROUND) TO THE BATTERY. OPERATION OVER 17.5 VOLTS WILL CAUSE THE AMPLIFIER TO GO INTO PROTECT MODE AND CAN VOID THE WARRANTY

INSTALLATION

INSTALLATION CONSIDERATIONS

Installing an amplifier on your own can be a rewarding project, but it’s important to approach it with caution and thorough preparation.
Reading the owner’s manual thoroughly will provide you with the necessary knowledge and precautions to take before beginning the installation process.
If you find yourself uncertain at any point, seeking assistance from authorised distributors or dealers is a wise choice to ensure that your setup is correctly configured and your warranty remains valid.

Remember, safety and proper functioning should always be your top priorities when handling electronic equipment.

PREPARATION

When installing an amplifier in a vehicle, it’s crucial to disconnect the negative battery cable to prevent any electrical shorts or damage. Ensuring that the battery and alternator have secure and corrosion-free ground connections is vital for the system’s performance. The amplifier should be mounted in a location that allows for proper cooling and is safe from excessive vibration; improper mounting can cause damage and hurt performance.

Mounting the amplifier vertically helps dissipate heat through the heatsink fins effectively.
It’s also important to ensure the installation area is dry and well-ventilated. Careful routing of cables, especially the RCA cables, away from high-current wires minimises interference and alternator whine.
Keeping a good distance between RCA, power, and speaker cables can further reduce potential noise and safety hazards.

POWER CONNECTORS

12V [POWER CONNECTION)

Before mounting the amplifier, disconnect the negative (-) wire from the battery to prevent any accidental damage to the amplifier or the audio system. The amplifiers are equipped with 0 AWG power and ground terminals.
All terminals must be used with the appropriate cable to ensure correct operation. Connect the power cables to the power terminal labeled as +1 2V.

These amplifiers are not equipped with fuses, so external fuses are required at both the battery and the amplifier.
Connect one end of the fuse holder to the power cable and the other end of the fuse holder to the positive battery terminal within 8 inches (20 cm) of the same cable. The same should be done at the other end of the cable that connects to the amplifier.
The fuses will protect the system and the vehicle against the possibility of a short circuit in the power cable. Make sure that the fuses and the fuse holder meet the system requirements.

GND [GROUND CONNECTION)

Locate a secure grounding connection as close as possible to the amplifier. Ensure the location is clean and provides a direct electrical connection to the chassis of the vehicle.
Connect one end of a cable of equal size to the positive cable to the ground location.

It is important that the ground cable is as short as possible, but no longer than 20 inches (50 cm) at maximum.
Run one end of the cable to the grounding point and the other end to the mounting location. Connect the ground cable to the terminals labeled as GND.

REM REMOTE CONNECTION )

Run a remote turn-on cable from the switched +12V source. This may be a toggle switch, a relay, the source unit’s remote output cable, or power antenna trigger cable.
Connect the remote turn-on cable to the power terminal labelled as REM.
The REM out terminal is mainly intended for the connection of another amplifier run in a chain, but it can also be used for other units.

INPUT [RCA CABLE)

Run the RCA cables away from the high-current cables and speaker cables, and connect them to the amplifier.
Use high-quality cables with a secure grounding point to avoid amplifier malfunction and/or alternator whine.

SPEAKER CONNECTION

SPEAKER IMPEDANCE 10 HM ~ 8 OHM

Loads under what is specified will cause excessive heat & the amplifier will reach thermal at a faster rate & will eventually go into protect.

IMPEDANCE LOAD UNDER I OHM IS NOT WARRANTED!

We recommend using a minimum 8 Ga speaker cable to acquire the intended performance & efficiency.
Run the speaker cables from your speakers to the amplifier’s mounting location.

Ensure these are ran separately and away from high current cables and if possible, the RCA cables as well.
In all cases where cables are penetrating the vehicle’s chassis, use grommets to protect the cable.
Connect the speaker wires according to the terminals on the speaker(s). Strip 3/8’’ / 1 cm of insulation from the end of each cable and twist the cable strands together tightly.

Make sure there are no stray strands that could touch other cables or terminals as it can cause a short circut.
Crimp spade plugs over the end of the cable or tin the ends with solder to provide a solid terminal.
Connect the cable ends to the amplifier as shown in the diagram. Note, the amplifier’s speaker terminals are internally bridged.

CAUTION: CONNECT THE +12V WIRE, KEEPING IN MIND THAT THIS WIRE MUST BE FUSED AT THE BATTERY AS WELL. ENSURE THE GROUND IS APPROPRIATE, THEN CONNECT IT TO THE AMPLIFIER.
CONNECT THE SWITCHED REMOTE. REATTACH THE NEGATIVE WIRE [GROUND) TO THE BATTERY. OPERATION OVER 17.5 VOLTS WILL CAUSE THE AMPLIFIER TO GO INTO PROTECT MODE AND CAN VOID THE WARRANTY.

MASTER / SLAVE CONNECTION

LINKING MASTER AND SLAVES IN THE STEPS BELOW

Keep in mind that both amplifiers need to be switched off before any connection is initiated.
If you are unsure of the process, get the amplifier installed/tuned by an authorised B2 audio installer.
1. STEP 1.
  - Connect the RCA output from the source unit into the Master amplifer input, check the switch is set to MASTER. Use only 1 RCA input. The other RCA connection is the output.
2. STEP 2.
  - Connect a RCA from the output on the Master amplifier to the input on the Slave amplifier. Set the switch on the slave amp to SLAVE.
3. STEP 3.
  - Connect one end of speaker cable of the absolute maximum gauge of the Master amplifer.s negative speaker output terminal. Connect the other end of the cable to the negative speaker output on the Slave amplifier.
4. STEP 4.
  - Connect the positive speaker cable to the Master amplifer’s positive output terminal.
  - Connect this to the loudspeaker’s positive terminal. Connect a negative speaker cable to the Slave amplifer’s positive output terminal,and route the other end to the loudspeaker’s negative terminal.

MASTER / DAISY CONNECTION

In daisy chain mode, the master amplifier’s audio settings, such as gain, crossover, etc., are routed to the amplifier marked as daisy.
From that daisy amplifier, you can route the input signal from the master amplifier to a second daisy by using the output RCA on the first daisy amplifier. You can continue adding amplifiers in a chain this way.
This feature is very useful when you run multiple subwoofers and have a hard time gain-matching them. If there is a slight voltage discrepancy between the master and the daisy amplifier, you can use the gain daisy to fine-tune the signal by +/- 5%.

ACCU8: THE ACCURATE CROSSOVER SETTING

Dealing with guesses and improper settings of your crossovers seems futile when you have invested both time and money into your audio system. If you use a DSP, you can set the crossovers at any specified frequency you see fit.
On the amplifier’s crossover setting, you would have to rely on costlier tools or guesses. The ACCU8 feature eliminates this challenge. The potentiometers, except for the gain, have a 41-click ratio when turned.
Each of these clicks corresponds to a specific frequency or level increase in dB. The chart below indicates these settings.

CLICK settings for LPF

LPF	LPF		LPF
1. 33 Hz	15. 61 Hz	29.	160 Hz
2. 34 Hz	16. 68 Hz	30.	170 Hz
3. 34 Hz	17. 76 Hz	31.	181 Hz
4. 35 Hz	18. 86 Hz	32.	185 Hz
5. 35 Hz	19. 100 Hz	33.	190 Hz
6. 36 Hz	20. 111 Hz	34.	195 Hz
7. 36 Hz	21. 116 Hz	35.	200 Hz
8. 39 Hz	22. 120 Hz	36.	203 Hz
9. 41 Hz	23. 125 Hz	37.	207 Hz
10. 43 Hz	24. 130 Hz	38.	210 Hz
11. 46 Hz	25. 135 Hz	39.	230 Hz
12. 50 Hz	26. 140 Hz	40.	240 Hz
13. 55 Hz	27. 144 Hz	41.	250 Hz
14. 57 Hz	28. 151 Hz

Audio Precision Charts

Zero 6

14.4V 40 HZ 4 ohm

14.4V 40 HZ 2 ohm

14.4V 40 HZ 1 ohm

TROUBLESHOOTING

The protection circuits of the amplifier prevent severe damage from faulty conditions and improper use.
The protection indicator will switch on due to a short circuit connection, high/low voltage or speaker overload, causing the amplifier to turn off.
Before inspecting the problem, turn all levels down and all power off, then carefully check the installation for wiring mistakes, shorts, or faulty ground.
If the amplifier shuts down due to excessive heat, the protection indicator will light up; please allow time for the unit to cool off.
Before removing your amplifier, refer to the list below and follow the suggested procedures step by step.
If you are not at ease, contact an authorised installer who can assist you.

AMPLIFIER DOESN’T TURN ON

Measure voltage on the +12V terminal.
Ensure that the remote terminal has a minimum. 13.8 V DC remote connection.
Recheck the ground (GND) connection. Inspect the in-line fuses.
Check that the protection LED is not on.

PROTECTION LED IS LIT ONCE THE AMPLIFIER IS TURNED ON

Check shorts on speaker wires & the connected load / impedance. Check power cables & GND the speaker cables and reset the amplifier.
High / Low voltage, operation voltage is 10V—17.5V. Voltages below/beyond this will cause the ampffiér to go into protection.

FUSE BLOWING

Measure the speaker impedance & that it is by the configuration.
Inspect the power cable for shorts along with the vehicle chassis.

OVERHEATING

Measure the speaker impedance & that it is under the configuration.
Check speaker shorts.
Ensure airflow around the amplifier is sufficient & that the amplifier is not installed in areas of excessive vibration & upside down!

AUDIO OUTPUT INSUFFICIENT – DISTORTED SOUND

Ensure that the gain settings on the amplifier are matched with the output level of the head unit.
Adjust the head unit volume.
Check speaker shorts.
Adjust the crossover frequencies according to the setup.
If no output at all, check the RCA connections & the cable itself.

TURN ON THUMP

Disconnect the signal input to the amplifier, then turn it on and off.
a) If the noise is cancelled, then connect a delay turn on module on the REM wire running from the source unit to the amplifier.
b) Use another 12V source for REM lead to the amplifier. If the noise is cancelled, use a relay to isolate the amplifier from the turn on thump.

HIGH HISS – ALTERNATOR WHINE

Ensure that all signal transferring wires (RCA, speaker cables etc) are kept seperately / away from the power and the ground wires.
Bypass all electrical components between the Head unit and the amplifier.
Connect the Head unit directly to the amplifier’s input. If the noise is eliminated, the unit being bypassed is the one causing the noise.
Remove the existing ground wires for all electrical components installed. Ensure that the point of ground is 100% metal, which has been ground free of rust, paint, etc.
Replace the ground cable from the OEM battery/alternator and ensure it is grounded acmrdingly.
Test the battery and alternator load (can be carried out by a professional).
Ensure that the vehichle’s electrical system is in a good condition, this includes distributor, alternator, spark plugs / wires, voltage regulators etc.

LIMITED WARRANTY INFORMATION

B2 audio offers a limited warranty under the following terms:
The product is to be free of defects in material & workmanship under normal use for one year from the date of the original purchase, when installed by an authorised dealer.
Items not installed by authorised dealers will be warrantied for 30 days from the original purchase.
Original sales receipts must be accompanied by all returns. The warranty applies to the original purchaser of the product & it being sold by authorised B2 audio dealers.

The warranty does not cover:

Damage caused by accident, abuse, misuse, improper operation, water/solvents & shipping.
Product modification, neglect, failure to follow installation instructions & misrepresentation by the seller.
Products used for competition purposes or are of such a character
Any product that has been opened.
Products that have had the serial number defaced, altered or removed.
The cost of shipping the product back for repair to an authorised repair centre & cost of return of non-defective items.

Frequently Asked Questions

Q: What is the recommended power source for the Zero6-Yggdrasill amplifier?
- A: The minimum battery recommendations are provided in the user manual for optimal performance.
Q: How can I utilise the Master/Slave mode feature of the amplifier?
- A: The Master/Slave mode allows you to link multiple amplifiers together for synchronised operation. Refer to the user manual for detailed instructions on configuring this mode.

Documents / Resources

	B2 Audio Zero Series 12K Watt 1 Ohm Monoblock Class-D Half Bridge Amplifier [pdf] User Manual Zero.5, Zero7, Zero9, Zero 12, Zero6-Yggdrasill, Zero Series 12K Watt 1 Ohm Monoblock Class-D Half Bridge Amplifier, Zero Series, 12K Watt 1 Ohm Monoblock Class-D Half Bridge Amplifier, 1 Ohm Monoblock Class-D Half Bridge Amplifier, Class-D Half Bridge Amplifier, Bridge Amplifier, Amplifier
	B2 Audio Zero Series 12K Watt 1-Ohm Monoblock Class-D Half Bridge Amplifier [pdf] User Manual Zero.5, Zero7, Zero9, Zero 12, Zero 15, Zero Series, 12K Watt 1-Ohm Monoblock Class-D Half Bridge Amplifier, 1-Ohm Monoblock Class-D Half Bridge Amplifier, Class-D Half Bridge Amplifier, Bridge Amplifier, Amplifier

References

User Manual

B2 Audio Zero Series 12K Watt 1 Ohm Monoblock Class-D Half Bridge Amplifier

Product Usage Instructions