On Jun 15, 10:08*pm, Boon wrote:
On Jun 15, 9:06*pm, Bret L wrote:
*As far as high output impedance, it's fine with most all tube
amplifiers. If lower output impedance is needed, one refinement would
be to provide for transformers to be added via sockets as was done in
so much commercial gear. This would provide for true balanced 600 ohm
output so it could fit in tho the Real World of pro audio if needed
whilst not inflicting the considerable cost of the transformers on
users not needing them.
Why would you go to all of this bother when there are better products
available for far cheaper without butchering up an expensive old
Marantz?
*I wouldn't. I would build a new unit from scratch with the features I
wanted. A good DIYer could do it for maybe three hundred bucks in
parts, if he made his own step attenuator from switches and boards,
with a little scrounging.
Then again, the McIntosh C2200 is still a much more intriguing preamp
than the 7C.
Isn't it funny that Marantz, McIntosh and Luxman are making their best-
sounding equipment today, in 2010? A DIYer really can't match that
stuff.
Bull****. Most of this stuff is so complicated that it would indeed
be infeasible for a DIYer to emulate, but that does not mean it's
good. Its very complexity with "features" like on-the-fly cartridge
loading via remote control introduce new issues.
Actually, my real hope is that commercial vendors would pick up on
the idea I put forth, and manufacturing them in some quantity the
price would come down. But the DIYer is the core true audiophile per
se, and is much to be celebrated. You don't have to build your own
stuff to be an audiophile but it is the most rewarding facet, in my
opinion, of the hobby.
As far as the ARC SP-3a,
http://www.arcdb.ws/SP3/ARC_SP3A1_schematic.gif
http://sites.google.com/site/mpbarne...archsp-3preamp
give useful info. It does seem to be a M7 derivative and to me that
just validates what I originally said. As Simone Signoret said when
informed Yves Montand, her husband, had been putting it to
Marilyn.....