@5aces
Could you give some opinions on the S.A.E mark IXB pre-amp and IVC power-amp?
I can hear some tiny zzzz sound when I close my ears to speakers. What should I do to this sound if it can be eliminated? Thanks.
I have not heard your 1974-1977 S.A.E. set but certainly am aware of the brand.
American home brewed solid state amplifiers that aimed to eclipse Marantz and McIntosh for sound,especially in the early Seventies.
Two really nice pieces from the best years with a new retail of $450 for the IVC power amp and $400 for the IXB pre.
It would be a stretch for these to scale up to the 1975 Yamaha C-1 & B-1.
Even the Sansui had a list of $600 for the BA 2000 power amp and $440 for the CA 2000 pre in 1977.
This might be a fair comparison and I would enjoy a vintage shoot out between the two.
S.A.E.was a two man band I believe and didn't have the massive resources of the big players,which certainly didn't stop them from cranking out some righteous amplifiers.
Coincidentally,when the company tried to appeal to the masses,it was the beginning of the end.
When I say the Sansui CA preamplifier is dead silent with no signal,right-that means no buzz through the headphone circuit board or speakers.
No signal or noise should be present at the preamp outputs if the output selector is set to 'off'.
Signal should not be leaking through the preamp outputs when the input selector is switched around.
If you have a hum through your speakers when the volume is turned up,try unplugging the RCA source and see if it goes away.
I just
know you are using good,shielded RCA cables from your source.
The fabled Hum & Buzz can be testy to nail down.
I use a Furman power conditioner and PS audio power bar to keep the the wall outlet power in check.
Common causes of noise and intermittent problems:
-Dirty connections.
-Poorly made terminals, inexpensive RCA jacks often fit poorly enough to cause a buzz or hum.
-Poorly terminated connections. Cold solder joints, loose fitting terminals.
-Poorly shielded cables picking up noise from RF or house main electrical.
-Cables picking up noise from AC extension cords. Move cables or cross at right angles.
-Check the polarity of the outlet - it may be wired backwards.
-Light dimmers, flourescent lamps, and other appliances that share the same circuit or common ground with your audio equipment can cause hums.
-Check to see if you have an outlet in the wall that is worn out and will not grip.
If the hot/neutral/ground prongs on the plug and ground are making intermittent or light contact with the tang on the inside of the outlet, it can cause a hum through the system.
Not much need to go beyond spec grade (Hubbel Commercial) when replacing a receptacle.
Welcome to the notorious ground loop zone.
So then a piece of gear like this would be useful for doing what you described, yes?(Pioneer D-23 Active Crossover)
In 1977 biamping wasn't on my mind but sure was for some folks.
Yes,that D-23 would permit multi channel amplification to drive multi way speaker systems (2/3/4-way).
Interesting first patent for the Multiple Driver Dynamic Loudspeaker circa 1974.
http://tinyurl.com/7qvw4ws
3-way speakers really became popular during the 1980's.
In today's world,you could have some great fun with a tube XM126 crossover from http://www.marchandelec.com/
These guys have been at it for a while now,again note:this kind of approach mandates
deep pockets