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

14 Reviews | 7 questions - 27 answers

Item # 543ADP12

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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.

Great product for using powered speakers with a receiver.

Anonymous, New York, NY

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(s):

(14 Reviews)

Worked perfectly!

Jason from Spring, TX on 12/27/2016

Crutchfield Customer Review (What's this?)

I am using this because my onkyo receiver does not have pre-amp outs, but I want to power my new Polk RTi A7 speakers with a stand alone power amp (Crown XLS 1502). Works great, was easy to connect and the sound is clean! I can't tell that there is any added noise in the signal due to adding this device. I am happy with the purchase and would highly recommend if you want to run an external amplifier, but your receiver doesn't have pre amp outputs.

Pros: Small and affordable

Cons: None

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

Anonymous from New York, NY on 12/7/2016

Crutchfield Customer Review (What's this?)

Great product for using powered speakers with a receiver.



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

James from Duxbury, Ma on 12/6/2016

Crutchfield Customer Review (What's this?)

Exactly what I needed to add an amp to power my outdoor speakers on my Sony receiver. I would of had to disable a pair of speakers to use the preamp output on zone 2 but by installing this everything is working together

Pros: Easy to install

Cons: Should be enclosed

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

Anonymous from Indianapolis, indiana on 8/29/2016

Crutchfield Customer Review (What's this?)

Worked exactly as expected. It could use a simple cover to make it more attractive.



Simple way to get sound to another room

rmjb from Trinidad and Tobago on 6/27/2016

Crutchfield Customer Review (What's this?)

When my house was built I pre-wired for speakers in the living room, but did not consider speakers in the back porch. I installed speakers in the back porch last year and tried a couple wireless options to get sound outside with poor results. I also tried to pull wire all the way back to my receiver, but because of concrete construction was only able to get to the living room's speaker posts on the wall. This unit was a simple, straight forward way to connect to those speaker posts and get a line level signal. Once I had this I hooked up a simple small T-Amp and now I can drive the speakers in the back porch. This solution is working much better than either of the wireless solutions I tried; no extra load on the receiver, no delay between the rooms, sufficient power from the T-Amp and the ability to turn off the T-Amp when no one is outside. If you have a need for something like this, highly recommended.

Pros: Does exactly what it says

Cons: I wish it were enclosed. A little pricey compared to other options, but those are for car audio purposes and this one is from a home audio manufacturer, so it just works.

Product meets exactly my needs

John D from Washington, DC on 6/10/2016

Crutchfield Customer Review (What's this?)

I purchased this for a solution to send my Center Channel on my Denon AVR wirelessly via Bluetooth to my soundbar in my home theatre that doesn't accept speaker level inputs. I purchased a small enclosure for it for protection since its usually a vehicle under-dash install.

Pros: performs exactly the needed unique solution for signal transformation.

Cons: An option to buy it with an enclosure would make it perfect

Product solved multiroom challenge, great tech support

B. Smith from salem, MA on 2/28/2016

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

Alex P from new orleans, LA on 1/30/2016

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.




bvaldyke from Florida on 11/5/2015

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

JeffO from Birmingham, AL on 8/6/2015

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

Kevin T from Alabama on 6/1/2015

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

Anonymous from Louisiana on 3/16/2015

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

Anonymous from Dallas Texas on 1/12/2015

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

Colin from Florence, Oregon on 11/12/2008

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

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?

I need to hook up my ancient amp which has no dedicated subwoofer out to a modern subwoofer which only take RCA input. [ ming  Dec 23, 2016 ]
Connecting an older receiver to a wireless transmitter system requires this adapter so the volume can be controlled through the receiver. [ Mark  Dec 10, 2016 ]
Need to conver audio signal from speaker to line out. [ Rudy  Oct 28, 2016 ]
I want to use a powered subwoofer with a vintage Kenwood receiver and not use speaker wires. Crutchfield has the adapter for this application. [ CHARLES  Oct 11, 2016 ]
With the help from Crutchfield chat, Larry pointed in the right direction....thank you and thank Larry. [ John  Sep 23, 2016 ]
The Crutchfield advisor I worked with suggested that this item would work a lot better than the car audio line-level adapter I'd been using (D'oh!). He was right! Works perfectly. [ Bryan  Aug 30, 2016 ]
Living room speakers were pre-wired, but I needed to jump off from there to ceiling speakers in the back porch. I'll use these to tap off the living room speaker terminals and run line level to the ceiling speakers amp. [ Richard  May 31, 2016 ]
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 ]

7 questions already asked

This unit works just fine outputting a standard line level signal. The gain on the external amp would depend on the source. Since the adapter is putting out the standard line level signal, for the consumer electronics industry, that is 0.316Volts (-10dBv) In the professional audio world that would be 1.23Volts or +4dbu. [ Alan Copeland  Jan 12, 2017 ]
I sound fine. in my experience I had a lot interference noise. I connected my receiver to a vintage amplifier to play my turntable. So I think it depends what you need it for. I ended up buying a AV receiver with preout and phono input. [ Carlos  Jan 12, 2017 ]
Yes you can, and once you set an appropriate level on the powered speaker, the volume controls on the receiver will also affect the centre channel. [ Richard  Dec 31, 2016 ]
The Russound ADP-1.2 is intended to convert an amplifier's speaker level outputs to industry standard "line/pre-amp level". If the output you describe as "center channel speaker line out" is indeed an industry standard "line level output", then no, the ADP-1.2 will not work for that purpose. If, on the other hand, you are actually describing an amplified center channel speaker level output, the ADP-1.2 will get your job done. [ STEVE  Dec 30, 2016 ]
This takes regular speaker outputs and makes it a pre amp out put so you can run it to an active speaker. [ JASON  Dec 30, 2016 ]
If I understand your question, yes. I don't have preamp out terminals on my integrated amp, so I run speaker wire from my front channel speaker connectors to this. Then use RCA cables to run from this to my power amp. Works great! [ AARON  Dec 17, 2016 ]
NO, it will take speaker level output and turn it into line level for mixing or cd/tape deck input. [ ANTHONY  Dec 17, 2016 ]
You will connect two chanels that would typically go to speakers directly. The other side of this board is a reduced RCA signal that you will connect to your external amp. Be careful as this board has a max wattage that can be applied to it from the integrated amp. This amp will also control the volume to the second. [ Dustin  Dec 17, 2016 ]
I couldnt get it to work on any of my Marantz amps, tried to use bluetooth, returned item [ DAVID  Dec 17, 2016 ]
Bought this adapter for totally different reason. I have older model only integrated amp with no subwoofer input/output connection. I wanted to hook up Martin Logan sub which had typical sub connection Or ex jacks. The int amp had nether option. So I attempted to use speaker wire from int amp to one end of adapter and ex jacks from sub to other end of adapter,, did not work. My sub sits quiet. Will b buying better and newer Int amp (luxman) and pass currrent amp to my son. If anybody can offer advice on how to use sub currently,, I am all ears [ James  Dec 17, 2016 ]
If I understand correctly, you wish to run your speakers and this adapter from a single pair of stereo-speaker outputs, that is, you don't have a speaker A/speaker B/both switch and A/B speaker outlets. I recommend consulting with the manufacturer of your amplifier. This device should not draw a lot of current, so it might work, but it would be a shame to destroy your amplifier. [ Christopher  Oct 28, 2016 ]
Yes, this will be in parallel with the speakers and send a signal to the sub amp. This has a left and right in and provides a left and right out with RCA. If you only have one in, use a RCA Y to go to the amp or jump the line inputs on the board together (+ to + and - to -). [ Dustin  Oct 24, 2016 ]
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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