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Stinger SPT521 (Chrome)

Gauge Reducer, 1/0 Gauge Input to 4 Gauge Pin

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List price $17.99

You Save: $9.00 (50.03%)

$8.99

with warranty

Order within 53 hrs 36 mins to ship 8/3

Arrives by Monday, Aug. 10 to zip 98109

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Warranty assistance for a year

In Stock

Arrives by Mon, Aug. 10

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  • Gauge Reducer Adapter
  • 1/0 Gauge Input to 4 Gauge Pin
  • Deep wire recesses
  • Oversized set screws
  • Ultimate power delivery
  • Improves cosmetic apperance
  • Corrosion resistant Shoc-Krome plating
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Product History:

Stinger SPT521 thumbnail
(newest, current model)
Stinger SPT821 thumbnail
(previous model, replaced by Stinger SPT521 (Chrome))

Connector Specifications

Connector Type
There are many different ways to connect wires together. Often times when doing your own installation, you will be in need of specific types of connectors. This is the specific type of connector or terminal that is included with this item.

Bullet and Butt connectors are used to connect to wires together. Butt connectors are often used when installing an aftermarket headunit to the factory harness.

Quick Disconnect Connectors are used primarily in head unit or speaker applications. They provide a simple and easy way to connect or disconnect your wire.

Quick Splice Adapters and T-Tap Connectors can quickly tap a wire to already connected wire.

Relays, Relay Sockets and Switches are used for electronic applications such as car alarm installations and other audio applications.

Ring and Spade Terminals connect wires to a terminal. These are mainly used in battery hook-up, amplifier connection, speaker connection, and other various installation applications.

Gauge Reducer
Connection Gender
This is the gender of the connector. Usually a specific type of connector will have both male and female connectors. Please make sure that you order the correct gender of connector that is required for your installation.
Male
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
Primary Color
This is the main color of the item.
Chrome
Quantity
This is the amount of units that is included with the item.
1

Warranty and Return Policy

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

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
58%
4 Star
37%
3 Star
0%
2 Star
5%
1 Star
0%

Average Attribution Rating

Durability
4.8
Value
4.6
Features
4.7
Design
4.8
Usability
4.8
Jmiller368

Harrison Twp. Michigan

Overall
Durability
Value
Features
Design
Usability
Good product

April 30, 2014

I would recommend this product because it makes a good connection instead of trying to stuff the 0 gauge wire into a 4 gauge terminal. You need to have good clearance between the positive and ground on the amp for these to work so check before you order these. I had to slightly modify mine to work

32 of 56 found this helpful

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Jacob

Savannah, GA

Overall
Durability
Value
Features
Design
Usability
Very durable and works like a charm

November 17, 2014

These things are true 4 gauge so make sure your amp has true 4 gauge inputs or it has to be grinding down. It works great and love the quality.

26 of 46 found this helpful

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Josh

Park city, UT

Overall
Durability
Value
Features
Design
Usability
Good tool

February 19, 2015

Great product fit perfect for me and not I have the right power supply thanks sonicelectronix !

17 of 30 found this helpful

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josh

jesup, IA

Overall
Durability
Value
Features
Design
Usability
True to spec

October 3, 2014

Amazing quality will not strip out, High quality metal. Highly recommend these if you need them.

I have used cheap reducers in the past that costed double the price of these and these are by far much better.

24 of 44 found this helpful

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REM

Los Angeles, CA

Overall
Durability
Value
Features
Design
Usability
A Must Have

July 8, 2014

Besides how bad*ss these things make the install look, they definitely serve a purpose. I do believe I am getting a far better connections with these. I picked up Six of these for various parts of the install, and I LOVE the look. I plan to get a few more for the next step of the install.

25 of 47 found this helpful

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Mikey

battiest, OK

Overall
Durability
Value
Features
Design
Usability
it's too big

April 11, 2014

Its too large for either a crunch or hifonics mono sub amp that says the size cable they can use to power them is 4 gauge but these didnt fit , had to grind mine down too fit, cuz I am obviously using them to connect 1/0 gauge wire too an amp that it didnt fit, overall , good product , looks professional when you are showing it off even after grinding on them

26 of 49 found this helpful

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Jermiah

Loris, SC

Overall
Durability
Value
Features
Design
Usability
Works

October 27, 2014

Wish I had gotten two but it works well carrying the power to the amp

33 of 64 found this helpful

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Jonathan (STICKBOY)

Winston Salem, NC

Overall
Durability
Value
Features
Design
Usability
Does not fit

October 10, 2014

I bought these for the hifonics x2200 amp and they do not fit the 4 guage terminals. Also, the x2200 wire terminals are angled and you would have to raise the height of the amp a bit in order for the amp to even be mounted to a flat surface.
These are good quality adapters but do not work in my situation!!!

22 of 42 found this helpful

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Big John

Ludowici, GA

Overall
Durability
Value
Features
Design
Usability
looks great !

May 3, 2014

I love these adapters ! Oversized wire looks great going to a small amps . These adapters work great !

24 of 47 found this helpful

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Nicolas

Chile

Overall
Durability
Value
Features
Design
Usability
Nice price and nice product

November 29, 2013

just the perfect size and the perfect product, it fix pretty good for 0 gauge cable.

20 of 39 found this helpful

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J

Red Wing, MN

Overall
Durability
Value
Features
Design
Usability
Very Helpful Product

March 8, 2013

Makes life easier if you have 0AWG power and ground wire trying to squeeze it into your amps 4AWG terminals. Made great, easy application.

21 of 41 found this helpful

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Art

Glendale, AZ

Overall
Durability
Value
Features
Design
Usability
great value

April 19, 2015

Fits awesome my system is doing great,I would definitely recommend

10 of 20 found this helpful

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kenneth

Palmyra, VA

Overall
Durability
Value
Features
Design
Usability
Great product

February 5, 2013

This was a great product. One gauge wire is always hard to deal with and this made it easy to hook up my amp.

23 of 47 found this helpful

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L

TX

Overall
Durability
Value
Features
Design
Usability
Upgrading BIg 3 Upgrade Kit

April 25, 2015

Bought the Kicker Big 3 Upgrade Kit at Sonic Electronix and use 3 Stinger SPT521 to have better connection to the Kicker battery terminals. Put some Xscorpion heat shrink and makes it more of a professional look.

8 of 19 found this helpful

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teamaudioturbulance

rootstown ohio

Overall
Durability
Value
Features
Design
Usability
stinger spt51 0 to 4 gauge input reducers

July 20, 2014

These are great! True zero gauge to 4 gauge input reducers. only down fall is that they need to be ground down to fit lower quality amplifiers that dont have true inputs.

20 of 43 found this helpful

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Brandon

pomfret md

Overall
Durability
Value
Features
Design
Usability
great product

August 29, 2014

This product works great and looks great adds the extra power to where its needed and makes it fit nicely

19 of 43 found this helpful

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Gary

MD

Overall
Durability
Value
Features
Design
Usability
Clean. Solid.

August 7, 2013

Even with aftermarket battery terminals I was having a hard time getting everything clean and neat. This allows enough of the wire to be inserted to insure a secure connection. The half moon or D shaft allows for a very secure connection with any set screw terminal.

18 of 42 found this helpful

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Joseph

west Warwick, RI

Overall
Durability
Value
Features
Design
Usability
easy

August 15, 2013

Great product easy hook up makes everything look better too worth it

20 of 49 found this helpful

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Tyrone

Bennettsville, SC

Overall
Durability
Value
Features
Design
Usability
Great price

March 19, 2014

I would recommend this to anybody because it helps out with installation. Just took a little longer getting here.

21 of 53 found this helpful

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Browse 1 question and 10 answers
Hide answersShow all answers | Sort by
Why did you choose this?
Sonic Electronix Store
The terminal block I had would not accept 0/1 gauge wire.
Samuel F on Jul 15, 2015
i needed it
Ishmael M on Feb 1, 2015
Get some more in there great
mark r on Feb 13, 2015
Hard to find spade connectors for 1/0 AWG. Must have for Amps without 0 guage connections.
rahmel n on Nov 20, 2014

Product Summary

Manufacturer

Model Number

SPT521

UPC

609098789110

Weight

0.50lbs

Internal SKU

spt521

Internal Product ID

46119

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: Stinger SPT521 (Chrome)