RCA Stereo to Mono converter where to buy ?

[tjtremor]

Was looking at merging Left,Right channels into Mono. I don't really want to build the adapter.
Why are these so rare to buy ? Was looking at Amazon & Aliexpress but can't find much.

for line out it would be this and with these adapters I could just ignore the soldering part.
'left + 1kohm' 'right + 1kohm' -> mono channel

*Edit, I was able to find some converters on Aliexpress

 

[RickSanchez]

What is it that you're looking to do in your system by merging L+R into mono?

 

[tjtremor]

What is it that you're looking to do in your system by merging L+R into mono?

For subwoofer or center channel

 

[RickSanchez]

Does this thread help at all?

• https://www.audiosciencereview.com/...d-stereo-to-mono-summing-for-subwoofer.26736/

 

[DVDdoug]

*Edit, I was able to find some converters on Aliexpress

The 1st one is just an RCA adapter with screw terminals. You could build your own with three of those and two resistors.

The 2nd one seems to be what you're looking for.

For subwoofer or center channel

Bass is usually "mono" anyway so you can just use one channel or the other. If you've ever played-around with a vocal remover (which subtracts left from right to remove the "center") you'll find that the bass gets removed too because it's almost always identical in left & right.

Why are these so rare to buy ?

Good question! I've seen passive mixers (with volume/level controls) but I don't think I've ever seen a fixed-passive mixer.

 

[tjtremor]

Does this thread help at all?

• https://www.audiosciencereview.com/...d-stereo-to-mono-summing-for-subwoofer.26736/

thanks, reading it now,
I did find one store selling the adapter, it's not cheap. I guess it's not a basic circuit.

39.9US $ |Stereo To Mono Audio Converter With Isolation Output Stereo/mono Adapter Hi-fi Audio Mixer - Home Theatre System - AliExpress

Smarter Shopping, Better Living! Aliexpress.com

www.aliexpress.com

I wonder if I should just get a simple equalizer that has LFE out from stereo inputs ?

 

[tjtremor]

The 1st one is just an RCA adapter with screw terminals. You could build your own with three of those and two resistors.

The 2nd one seems to be what you're looking for.


Bass is usually "mono" anyway so you can just use one channel or the other. If you've ever played-around with a vocal remover (which subtracts left from right to remove the "center") you'll find that the bass gets removed too because it's almost always identical in left & right.


Good question! I've seen passive mixers (with volume/level controls) but I don't think I've ever seen a fixed-passive mixer.

Right now I'm using one channel for the sub, works ok since my bookshelfs have 6.5" woofers. I did notice a lot of tracks where for some reason bass starts on one channel, then moves to both channels. Some electronic tracks also have bass swipe between channels.

I did have high inputs (left,right) into the sub before, but I noticed this old sub is pretty bad at bass precision / loudness with high inputs vs RCA LFE.

 

[mhardy6647]

Rane Note: Why Not Wye? (Or "Y" For That Matter) - ProSoundWeb

Split a signal into two lines? OK. Mix two signals into one? Nope

www.prosoundweb.com

It is easy (easy) to make such a gizmo.

(from DIYAudio... I don't have the original reference handy)
I built one out of junkbox parts for a fellow @ AK who wanted to listen to mono records in true mono (i.e., sum all out-of-phase noise to zero) and lacked a mono switch on the amp with which he wanted to use to do it. Rather than go to the trouble of cutting holes and mounting two sets of RCA jacks on the summing box, I cut an old stereo patch cord in half and used that. I am nothing if not preternaturally lazy.