Black Diamond 4x M8.4B Midrange 2200W + 2x T1 Tweeters 240W + KX4 4 CH — Big Jeff Audio Dealer Platform
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Welcome To The Dealer Platform


  • MIDRANGE THAT HANDLES IT ALL - A mid-range driver that can answer the call to handle the most significant part of the audible sound spectrum. A speaker that sounds great with just instrumentals and, even better with vocals.
  • POWER YOU CAN COUNT ON - Black Diamond DIA-M8.4B delivers an impressive 550W Max Power with 275W RMS at 4 Ohms, enough to tackle a full range of audio.
  • 1" SUPER BULLET TWEETERS - Specifically designed Bullet dust cover to protect the voice coil and ensure that the highs cut through road noise and big bass.
  • FULL RANGE AMP - If you are looking for an amplifier that can handle the full frequency range then look no further! Wire the most powerful midranges tweeters drivers or coaxial to this full range series
  • AMAZING POWER IN AN EFFICIENT PACKAGE - Capable of 3200 Watts Max Power You'll have all the power you need while utilizing state-of-the-art technology that requires less energy

Black Diamond 4x M8.4B Midrange 2200W + 2x T1 Tweeters 240W + KX4 4 CH 3200W Amp

This listing includes:

(4)  Black Diamond  M8.4B  Mid-Range Speakers

(1)  Pair Black Diamond T1 Bullet Tweeters

(1)  Black Diamond K4X 4 Channel 3200W Amplifier


*4-Black Diamond M8.4B  Mid-Range Speakers*

General Specifications per Speaker:

Nominal Diameter: 8"

RMS Power Handling: 275W

MAX Power Handling: 550W

Nominal Impedance: 4 Ohm

Sensitivity: (1w/1m): 96 dB

Frequency Response: 115Hz-16KHz

Recommended Hi Pass Crossover: 120 Hz


Voice Coil Diameter: 1.5 / 38.6 mm

Voice Coil Former Material: Kapton

Winding Material: CCAW

Cone Material: Paper

Surround Material: Cloth

Basket Material: Steel

Magnet Material: Ferrite

Magnet Weight: 30 oz

Displacement Volume: .66L


Equivalent Volume: 26.60L

Excursion: 9.3mm

Free Air Resonance: 93Hz

Mechanical Factor: 9.275

Electrical Factor: 0.589

Total Factor: 0.552

CD Resistance: 3.2 Ohms


Overall Diameter : 8.22 / 209mm

Overall Depth: 3.38 / 86mm

Front Mount Baffle Cutout: 7.16 / 182 mm

Mounting Depth: 3.11 / 79 mm

Motor Diameter: 4.72 / 120mm

*1-Pair Black Diamond T1 Bullet Tweeters*


Nominal Diameter: 3.75"

Nominal Impedance: 4 ohms

AES Power Handling: 60W

Program Power Handling: 120W

Peak Power Handling: 240W

Sensitivity (1w/1m): 103dB

Frequency Response: 3.5K-20KHz

Recommended HI Pass Crossover: 2KHz


Voice Coil Diameter: 1" (25.4mm)

Voice Coil Former Material: Kapton

Winding Material: KCCAW

Diaphragm Material: Aluminum

Magnet Material: Ferrite

Magnet Weight: 8 Oz

Body Material: Aluminum


Overall Diameter: 3.78" (96 mm)

Overall Depth: 1.78" (45 mm)

Front Mount Baffle Cutout: 2.76" (70 mm)

Mounting Depth: 1.5 7" (40 mm)

*1-Black Diamond K4X 4 Channel 3200W Amplifier*


Total Watts (Peak): 3200W

RMS Power 4 ohm: 280W x 4

RMS Power 2 ohm: 400W x 4

RMS Power 4 ohm Bridged: 750W x 2


Frequency Response: 20Hz-45Khz

Signal to Noise Ratio: >90dB

Total Harmonic Distortion (THO): 0.01%

Low Level input Range: 0.25-6V

Selectable X-Over: LPF/FlAT/HPF

X-Over Filter Range: 50-250Hz


Amplifier Class: Digital (D)

Amplifier Type: 4CH Full Range

Led Indicator: Power/Protection

Power Input Terminal Size: 4ga

Fuse Size: 3x40A

Thermal Protection: Yes

Over-Load Protection: Yes

DC Outlet Protection: Yes

Short Circuit Output: Yes

Voltage Input Protection: Yes


Overall Length: 11.33" (288mm)

Overall Width: 4.72" (120mm)

Overall Height: 1.96" (50mm)

Heatsink Length: 10.15" (258mm)

Gross Single Unit Weight: 4lbs

Payment Information


We accept PayPal for all ebay orders. You can use your credit through PayPal as all major credit card are accepted by PayPal.

We accept PayPal for all international orders, your address must be verified with PayPal.

We are not responsible for any custom duties or brokerage fees that may apply for all international orders.

When you click on the Buy it Now button you are entering into a
contract whereby you agree to purchasing the item at the price listed.

If you want to ship your item to an alternate address please add
that address on your PayPal account and use the address as the default
or confirmed address to pay us through PayPal

With Free Same Business Day Shipping we work to get you your order Fast. 


All orders over $500 will require a signature for delivery.

All pre-selected shipping rates and methods are for customers with a
valid residential or commercial address within the Contiguous 48 United
States (PO Boxes address may require additional charges).

P.O. Boxes, APO/FPO addresses, Alaska, Hawaii, Puerto Rico, Guam,
U.S. Virgin Islands, Northern Mariana Islands, American Samoa, Canada,
and other countries may require additional shipping fees. Please contact
a member of our team for detailed shipping charges.

Shipping is available only to PayPal verified addresses. When making
payment please confirm your address has been verified with PayPal. Once
payment is made shipping address can not be changed/altered. Payments
made using an unverified PayPal address will be refunded and order will
be canceled.

We will not accept request to change shipping address once payment
has been made. Please confirm your shipping address is up-to-date and

Typical handling time for orders is 1-business day. We do our best
to ship every package with-in 1 business day of receiving a cleared
payment. In some circumstances additional time may be need, in which
case we will contact buyer.

Shipped orders that are returned by the shipping company due to an
insufficient address or an undeliverable address will be refunded less a
20% restocking fee.

If package is refused or marked undeliverable and returned
back to us by the carrier, you will need to pay the shipping cost in
full to have the package sent back to you or we can refund the money
minus the cost of shipping


If you have not received your package, but the tracking information shows that it was delivered,
please do the following within 36 hours of expected, stated delivery:


Verify the shipping address on the order is the address where you are looking for the package

Look for a notice of attempted delivery

Look around the delivery location for the package, or see if a neighbor has accepted the delivery

Be sure to double check your mailbox and other usual spots for package delivery


If you think that your package has been stolen, we will require a police report since this is now theft.
Once we have a police report on file for the stolen package, we will reship your order.