Impedance Matching Question

astelmaszek - thanks for your reply. That’s an interesting looking device and definitely appears that it would work, however probably more than I want to spend in this situation.


atmasphere - and thank you for your reply. I’m not concerned with elegance. I just want something that will work and sound decent. Just trying to use some extra gear to make some sound in a not so important location. Your reply did prompt me to do a little more "Googling" and I found this,

https://www.bhphotovideo.com/c/product/217366-REG/Rolls_MB15B_MB15b_Promatch_2_Way_Stereo.html

From looking at the specs for RCA, it appears that it should work, however I have no experience with Rolls products. As I said, not looking for super quality, but don’t want junk either. This line transformer sounds like a DIY project. So, is it just getting the proper transformer, 2 pair of female RCA’s, and a project box, then solder and assembly?

That'll work as long as it has the bandwidth.

So, is it just getting the proper transformer, 2 pair of female RCA’s, and a project box, then solder and assembly?

That would work too.

micro – iTube2  is good to go, but it is multiple function device. An audio transformer will be a great option.

Impedance Matching Question

Most know that the input impedance of an amp needs to be ~10X the output impedance of the preamp for proper matching. Is there an inexpensive device that can be placed between a higher impedance preamp and lower impedance amp to help solve the issue? This is not for critical listening, but I do want it to sound good.
tls49

"Most know that the input impedance of an amp needs to be ~10X the output impedance of the preamp for proper matching."

This is correct 10x is fine some even say 5 x is ok. If you can't do this ratio a unity gain low output impedance buffer will do the trick. Like this.            http://www.6moons.com/audioreviews/burson/buffer.html

Or a tube one, but some have a high output impedance as this one at 1kohm you may not be better off, and it could even be worse than 1kohm in the low bass because of the dc coupling capacitor that's needed on their outputs if it's not large enough.
http://www.decware.com/newsite/zbox.htm

Cheers George

The Burson Buffer has not been made for quite a while now, and are hard to find. However Burson has this ingenious RCA cable with a small solid state buffer built into it. It is powered by 5 Volts DC. It will help with most any impedance mismatches.