2. amps-preamps
  3. 136375-1400

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
astelmaszek
125 posts
 
iFi iTube2. A little miracle box.
atmasphere's avatar
atmasphere
12,169 posts
 
A line transformer can be used. IME, not an elegant option, but it works. You are better off with a preamp that can drive the amp properly.
tls49's avatar
tls49 OP
1,351 posts
 
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?

atmasphere's avatar
atmasphere
12,169 posts
 
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.
alphaee
7 posts
 
micro – iTube2  is good to go, but it is multiple function device. An audio transformer will be a great option.
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