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Russound ADP-1.2 Speaker-level to Line-level Adapter

8 Reviews | 3 questions - 15 answers


Our take on the Russound ADP-1.2 Speaker-level to Line-level Adapter

Use this adapter to convert a speaker-level signal to a line-level signal. It's great for sending the amplified output of a multi-room audio system to a more powerful amplifer, or adding a second amp to power more speakers. The adapter features a four-conductor speaker wire input and a female RCA stereo output.

Simple, inexpensive, works as stated. If it's what you need, it will work.

bvaldyke, Florida

What's in the Box:

  • Speaker-level to Line-level interface
  • Instruction manual

Product Highlights:

  • speaker-level to line-level adapter
  • handles 250 watts per channel RMS
  • handles 500 watts per channel peak
  • attenuation: -30 dB
  • input terminals accept bare wire up to 14-gauge
  • female RCA stereo output
  • 3-3/8"W x 1"H x 2-1/2"D
  • warranty: 10 years
  • Our 60-day money-back guarantee

Russound ADP-1.2 Speaker-level to Line-level Adapter Reviews

Average Customer Review:

8 Reviews

Product solved multiroom challenge, great tech support

Written by: B. Smith from salem, MA on February 28, 2016

Crutchfield Customer Review (What's this?)

Was looking to solve multiroom, multi-amp challenge. Had tried feeding secondary amp with RCA backconverting high grade inwall speaker wire. Got signal but way too much noise. Initially tried car line to rca converters but no signal at all, prob impedance issue. Ordered Russound product and appeared to cause the dreaded hum from primary amp even if powering channel to Russound was off. Called Crutchfield tech support they went above and beyond to help troubleshoot prob (several calls). Long story short we solved a polarity issue in wall jacks followed by a ground loop issue (used PAC rca filter). Difficult challenge, all issues solved with the help of Tech support. Nice work

Pros: Can be used to feed secondary amp in home audio system where few options were available

Cons: Not much in terms of install trouble shooting. Be sure to be aware of polarity and ground loop

Great product overall, dubious about the design

Written by: Alex P from new orleans, LA on January 30, 2016

Crutchfield Customer Review (What's this?)

The device does exactly what it is supposed to. Brought my speaker output on my vintage pioneer receiver down to line level for input into a powered subwoofer. I only question the design. The circuit board and all components are exposed if left the way it is. Would be sturdier if encased in some sort of housing. Could "DIY" it but for the price, would be nice if it came that way out of the box.




Written by: bvaldyke from Florida on November 5, 2015

Crutchfield Customer Review (What's this?)

Simple, inexpensive, works as stated. If it's what you need, it will work.



Russound ADP-1.2 Speaker-level to Line-level Adapter Reviews

Written by: JeffO from Birmingham, AL on August 6, 2015

Crutchfield Customer Review (What's this?)

Works as advertised. I used three of these to provide signal to three power amps on my living room surround system (Receiver did not have audio preamp out). Would have given 5 stars if there were a cover for the unit, but I suppose they're intended to be mounted to an amp board in a vehicle. Work well.

Pros: Small and inconspicuous.

Cons: No cover... board will collect dust.

Works for my needs

Written by: Kevin T from Alabama on June 1, 2015

Crutchfield Customer Review (What's this?)

I purchased this device to run a pair of subwoofers from my Line Magnetic LM-518IA (integrated amplifier). The 518IA does not have any pre-outs to connect to a subwoofers and my subwoofers do not have speaker level inputs. I was able to use this device to convert the 518IA speakers outputs to line level inputs for the subwoofers without any noticeable issues. It works perfectly for my needs. Your mileage may vary.



Russound ADP-1.2 Speaker-level to Line-level Adapter

Written by: Anonymous from Louisiana on March 16, 2015

Crutchfield Customer Review (What's this?)

I bought this product after discovering that the Russound Amp that I purchased could not be joined with another amp unless I converted speaker level to line level. After adding this product, everything works fine. I'm not sure why this product is so bare, but it works....

Pros: Works

Cons: I little pricey and bare

Russound ADP

Written by: Anonymous from Dallas Texas on January 12, 2015

Crutchfield Customer Review (What's this?)

This little gadget saved the day.

Pros: Does everything it's supposed to

Cons: If it had a case it'd be better.

Speaker to line level converter

Written by: Colin from Florence, Oregon on November 12, 2008

Crutchfield Customer Review (What's this?)

This device takes amplifier speaker output levels and converts them to line levels for input to another amplifier, or any device requiring low level input. It works perfectly for me. I use it to provide surround sound signals to my Recoton transmitter which are picked by by a recieiver connected to self-powered rear speakers. The alternative would have been to crawl under the house to route speaker lines to the rear speakers. My wife said laying them across the floor was not an option.




Hands-on research

What's in the box?

Download the Russound ADP-1.2 Speaker-level to Line-level Adapter manual

  • Speaker-level to Line-level interface
  • Instruction manual

Product Research


Overview: The ADP-1.2 is an easy way to adapt a stereo speaker-level signal to line-level; this line-level signal can then feed an amplifier or other audio device. It can be used send the amplified output of a multi-room system to a more powerful amplifier, or to add a second amplifier to power more speakers. The input terminals are screwless and accept bare wire up to 14 gauge. The output is female RCA jacks (stereo). The maximum input power is 250 watts RMS per channel.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Needed to pad down the front 3 speaker levels to line level outputs for use with 3 powered speakers (front array) used in a home theater system. [ THOMAS  Dec 26, 2015 ]

3 questions already asked

Wrong Direction - product is an adapter for "speaker-level to line-level" [ Brad  Mar 07, 2016 ]
No I don't think so. This device is for reducing speaker output signal down to line level as to not fry your subwoofers power supply. If you're already at line level output from the receiver then this is unnecessary [ Alexander  Feb 25, 2016 ]
CAN'T help, the produft didn't work for me, returned [ DAVID  Feb 25, 2016 ]
In short, no. This device is used when trying to acquire a line level (pre-amp) signal from a device that only has a high level (speaker;post-amp) output. Your receiver has a line level (pre-amp) output which needs to feed an amplifier which will in turn power (drive) your in-wall subwoofers. Most home audio receivers are designed to be accompanied by a powered sub-woofer. That is why your receiver has a line level output. Depending on what kind of low end response (bass) you want a powered sub-woofer will most likely be the most ecinomical option. [ Michael  Feb 25, 2016 ]
sorry i don't know as i used it to convert speaker wire on my amp to line level inputs on my sub [ mike  Feb 25, 2016 ]
Tried it and did not work in my situation,,, never used it [ James  Feb 05, 2016 ]
I didn't have any of the parts on hand, so I started to order them on line.  By the time I got done with the 1/2 W 5% resistors, good-quality connectors, and a box to mount them in plus shipping, it would have cost less than $39.99, but it cost enough that I decided it wasn't worth the time to put it all together myself.  If you have the components on hand, by all means make it, but you'll save time and get a very well-build item if you order it here. [ Christopher  Feb 04, 2016 ]
It is well worth the price. Solved a very hard to find product. Most other similar products I found were only used in auto speakers that would not stand up to whole house speaker systems. They melted down. [ ROBERT  Feb 04, 2016 ]
It was worth it to me because it solved the problem I had of hooking wireless headphones into my home theatre setup. My wife is happy because she can have headphones while the rest of us have surround sound. In my experience a happy wife is well worth $40. Your mileage may differ. Sure it's probably a high-margin product. So buy the parts and build one yourself. [ Peter  Feb 03, 2016 ]
*works great [ AARON  Feb 03, 2016 ]
It does seem a bit steep, but I bought one and it would great, so I'm happy. [ AARON  Feb 03, 2016 ]
Yes sir it can be. I use one in my car and my home audio system. Buy this instead of those cheap ones. You will not lose any sound quality with these. Very good product. Highly recommended. [ CHRISTOPHER  Jan 09, 2015 ]
This is for a home amplifier. Chat with the techs at Crutchfield. They have ones specifically designed for car audio systems. [ David  Jan 04, 2015 ]
It's just a series of resistors, it will work with any amplified signal regardless of it being car audio, home audio or pro audio. [ ROBERT E  Jan 03, 2015 ]
I would think so that's what I'm doing with my Lexus LX 470. I bought this one because it's higher power my old one actually burnt up [ Robert  Jan 03, 2015 ]

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