I thought I told you I was interpreting it from the preamp schematics 🤨
The only thing that the computer sound card might do is ground loop. Which is easy to fix with some simple signal transformers.
Where did you find the -3dB @ 16 Hz? Onkyo claims DC-150 KHz.
The input is a differential JFET and there is nothing to roll off the LF
response in the input or feedback loop UNLESS you set the 3 position
LF cutoff swith to 10 Hz. Normal setting is 0.15Hz. The only questionable
thing is the DC input reference is the wiper of the 100k input level pot. If
that pot gets dirty things could get ugly. System gain is 25.5dB meaning
the passive preamp level pot won't have much if any headroom. A 6-10 db
amp would likely be sufficient.
The service manual is at HiFi Engine.
Merry Christmas
G²
-3dB @ 16Hz with 10K pot...https://www.diyaudio.com/community/threads/matching-pot-impedance-to-amp-input.406731/post-7539748
The amp needs a thorough cleaning including the pots. I will likely use it with the 10hz rolloff selected because I play records with no other filter available.
Also, I sit close to my speakers, and listen at fairly low volumes.
The amp needs a thorough cleaning including the pots. I will likely use it with the 10hz rolloff selected because I play records with no other filter available.
Also, I sit close to my speakers, and listen at fairly low volumes.
The specced value is always measured end to end and defines the pots basic resistance.
Has anyone posted this:
https://sound-au.com/pots.htm
Now I am running into the opposite problem. I found a BGW 250D for half the price, but its input impedance is 15K! Also, the manual for the IVH states thats its passive output impedance is "around" 1K!
Now, I have no idea what this amp actually sounds like. One guy claims it sounds like a tube amp! The TIM measurement is virtually the same for both amps.
Now, I have no idea what this amp actually sounds like. One guy claims it sounds like a tube amp! The TIM measurement is virtually the same for both amps.