T-Spec V12FDB-148M

Quad MANL V12 Series Fused Distribution Block w/ 1/0 Gauge Input & Two 4/8 Gauge Output

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Protect Your Equipment

Fusing an aftermarket car stereo system provides protection for your car and your car stereo. No fuse system provides better protection than T-Spec. The new T-Spec compact brass designs are constructed from solid brass and are smaller than anything else in the industry. This combination of top quality materials and thoughtful design provides an incredibly reliable and simple to install product that will last for years.

General Features:

  • Quad Mini-ANL V12 Series Fused Distribution Block w/ 1/0 Gauge Input and Two 4 and 8 Gauge Outputs
  • Solid brass construction for better power transfer
  • Industry first proprietary black coating
  • Water resistant housing
  • Fuse type: MANL
  • Number of Inputs: 1
  • Number of Outputs: 4
  • Fuses not included
  • Also found as: TSpecV12FDB148M
  • Dimensions: 2-5/8"W x 3"D x 1-1/2"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Distribution Block Specifications

Distribution Block Type
This specifies what the intended use of the distribution block is. Fused distribution blocks are intended to be used with the power wire and the fuse acts as a short-circuit or surge protection so your amplifier is not as likely to be damaged. Non-fused distribution blocks can used with ground or power wire connections, but the protection on power wire connections will not be present as there is no fuse in the distribution block. Therefore, we recommend your amplifier has an external fuse for short-circuit or surge protection. When using either type of distribution block, it is recommended to use a main fuse holder within 18 inches of the battery.
Total Number of Inputs
This is the total number of input connections that go into the unit.
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
1/0 AWG
Total Number of Outputs
This is the total number of output connections that the unit will produce.
Maximum Output Gauge Size
This number refers to the maximum size of wire that will fit into the output connector(s) of the capacitor, battery terminal, or any other connector with an wire output.
Number of Fuses
This is the number of fuses that the item requires to work properly.
Fuse Type
For accessories, this is the type of fuse that is required for the item to work properly.

For fuses, this is the type of fuse.

Mini ANL
The primary material used in this accessory. For optimal current transfer & durability, brass is generally preferred. You will often find products that are plated with chrome or other materials, which helps prevent corrosion and enhances the appearance of the product.
Black Coated Brass

Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
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1 Star

Average Attribution Rating


Visalia, CA


August 5, 2016

I've used these for three system builds, now and don't see a better product on the market for its intended use. Since most amps and many EQs, Active Crossovers, DSPs, etc. are usually placed in the middle or rear of the vehicle and the batteries are often under the hood, fusing just after the battery and just before the component is necessary if you care to protect your equipment. And, if you have multiple components (EQ/DSP, Active Crossover, Amps, etc.) its best to run a large gauge main power feed to the vicinity of such equipment and then distribute it locally. Different components will require different amperages - with a fused distribution block, you can install appropriately rated fuses for each component, all in one small block. It keeps installs solid, neat/clean and is very cost effective.

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Browse 1 question and 2 answers
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Why did you choose this?
Sonic Electronix Store
I've used this fused distribution block before and it worked very well - fused and distribution all in one compact package. It is easy to install, but I recommend tinning your cable ends first to get the best connection.
Danen G on Jun 29, 2016
Came with the inputs and outputs I needed. Also not overly flashy which makes it blend into my overly average car stereo setup.
Dustin P on Nov 10, 2015

Product Summary


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Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: T-Spec V12FDB-148M

Item Added to Cart

T-Spec V12FDB-148M

Quad MANL V12 Series Fused Distribution Block w/ 1/0 Gauge Input & Two 4/8 Gauge Output


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