This Kicker speaker wire adapter allows you to easily convert speaker wires into RCA plug connectors. With this adapter, you can connect your car stereo's speaker outputs directly into aftermarket amplifiers equipped with RCA inputs that take high-level signals, like Kicker's DX, ZX, and IX Series amps.

Product Highlights:

Hands-on research

What's in the box?

  • 18" Stereo speaker wire-to-RCA adapter (male RCA-type connectors on one end and set screw terminals on other)

Product Research


Overview: The Kicker speaker wire to RCA adapter (ZS-ZISL) allows high level speaker outputs to be connected via RCA plugs, ideal for use with amplifiers that have high-level input capability but no speaker wire input connections. The inputs are set screw terminals and will accept up to 14 gauge wire.

Dimensions: The approximate dimensions of the input and output terminals are:

  • RCA Jacks:
    • Diameter: 1/2"
    • Length: 1-1/8"
  • Speaker Wire Terminal:
    • Width: 1-1/8"
    • Height: 5/8"
    • Depth: 1-1/8"

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Kicker 09ZISL Reviews

Average Customer Review:

8 reviews
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Kicker high to low pass converter

Written By Anonymous, Friendswood, texas on Saturday, June 01, 2013

Crutchfield Customer Review (What's this?)

Great product. Easy to use

Pros: Ease of use

Works well

Written By Kevin, Grand Rapids, MI on Monday, May 13, 2013

Crutchfield Customer Review (What's this?)

Works just fine. I did check to make sure that all the screws were there (they were, and not loose), after reading some prior reviews. The only real issue was running the speaker wires through the dash from the adapter to the sub. I agree that it would be nice if this came supplied with the sub.

Pros: Small, well built

Should come with the sub!

Written By Georgia, Georgia on Sunday, April 07, 2013

Crutchfield Customer Review (What's this?)

Easy to use but should come with the Kicker powered subs as standard equipment.

Pros: Easy to use.

Cons: Should come free with the Kicker powered subs

Bad screw

Written By Taco96, Greensboro, NC on Wednesday, April 03, 2013

Crutchfield Customer Review (What's this?)

The cord is very nice and flexible, overall is good quality. I bought this cord for my Kicker Powered subwoofer because I wanted to use my RCA outputs on the back of my HU. It appears that kickers quality control over in Taiwan regarding the screws is quite lacking though. It had all four screws and none had fell out, but one of them was broken somehow. Half of the screw head was somehow busted off or something, making it difficult to screw in. I had to push in hard with my screwdriver to get it to grab on what was left of the screw, but I got it tightened. Other than that it is really nice and this is probably the best one out there. Kicker just needs to step up their quality control on these screws.

Pros: very flexible cord and good design

Cons: May have issues with a screw


Written By NOBAMA!, NORTH CAROLINA on Monday, February 11, 2013

Crutchfield Customer Review (What's this?)

Good thing i read prior reviews,when i opened the package there was 1 screw laying on the bottom not in the receiver .Good quality and i will install this weekend.

Pros: great quality

Cons: screw was not attatched in the end and was loose,but i found it and added it to the connector.

Kicker 09ZISL

Written By mak, Baltimore, MD on Wednesday, January 02, 2013

Crutchfield Customer Review (What's this?)

I bought one of this adapter to install my Kick powerded subwoofer. I did not want to tape into the rear speakers and this product is awesone . I thank crutchfield for the replacement and the quick shipping. Someone stole the first one because the stuipd UPS agent left in at my door although I live in an apartment. Crutchfied sent me a replacement the next day. I am giving 5 starts because of crutchfiled's customer service.

Pros: easy to install if you can reach the RCA output on the back of your head unit.

Cons: cord is too short.


Written By DanW, Ohio on Wednesday, November 09, 2011

Crutchfield Customer Review (What's this?)

Easy to install. Works as promised. I'll buy another for my next stereo install.

Pros: Easy to to install. It worked as promised, I didn't have to fabricate one myslef.


Written By C-Mac, Oklahoma on Sunday, October 23, 2011

Crutchfield Customer Review (What's this?)

I am sure that this product would work but was shipped missing one of the screws. Not a big deal to some, but I have been looking forward to getting all of the very expensive components I purchased installed, but....I am waitng another week for crutchfield to get me a complete product! I cannot use hear my stereo uprgrades because of a $.02 screw that someone forgot to place in the package.

Crutchfield response on Wednesday, October 26, 2011 Thanks for letting us know about the missing hardware. We understand how disappointing it can be when something like this interrupts your installation. The morning after you contacted us about the problem, we shipped your replacement item for next-day delivery. We found no record of recurring problems with this product, but we will pass your feedback along to the manufacturer.