[R-390] New favorite listening speaker

[SAM LETZRING]

My favorite speaker is my home-built Klipschorn I built about 30 years ago-
93 db/watt sensitivity!  Most power I have ever put into it is about 15
watts- and at that- we had to tape a large picture window! Incredible
design.

Sam


----- Original Message ----- 
From: "Bob Young" <youngbob53 at msn.com>
To: <r-390 at mailman.qth.net>; "Tim Shoppa" <shoppa_r390a at trailing-edge.com>
Sent: Tuesday, June 06, 2006 4:06 PM
Subject: Re: [R-390] New favorite listening speaker


> I have a mid 60's 15" Utah coaxial speaker waiting for my R390A to come
back
> from Chuck Rippel. I'm going to make a box for it, haven't yet decided on
> the design, sealed or ported. Probably ported as they're more efficient,
> although I may try the diode out on the back through an old tube hifi amp
I
> have and see how that sounds.
> Bob Young
> Millbury, Ma
>
>
> ----- Original Message ----- 
> From: "Tim Shoppa" <shoppa_r390a at trailing-edge.com>
> To: <r-390 at mailman.qth.net>
> Sent: Tuesday, June 06, 2006 5:37 PM
> Subject: [R-390] New favorite listening speaker
>
>
> > After some serious long-term listening to my 390A's, I've decided on
> > the ultimate listening speaker for SWLing:
> >
> >   Electro-Voice EV4's.
> >
> > These are mid-60's (? Lasnerian) vintage Hi-Fi speakers with 8 ohm
> > inputs and a midrange horn + tweeter and woofer with a crossover.
> > Most of the action when listening to SW is of course the midrange
> > horn with a little bit out the woofer.
> >
> > Coupled to my 390A with a 600-to-8 ohm transformer, they are sensitive
> > enough that with the local gain cranked to 5 or 6 I get a real good
> > mellow sound out of them that covers most of the basement.
> >
> > By comparison my metal bookshelf speakers (old Minimus 8's) no longer
> > sound very good at all. The EV4's are not as sensitive as the Minimus
8's
> > but the 390A's output stage can do a pretty good job of driving them.
> >
> > I could see going back to the Minimus 8's for voice communication maybe
> > where maybe some tinniness helps. The EV4's are really mellow and
> > filling by comparison, with very little directionality.
> >
> > I also tried a supposedly high-end PC-clone speaker system (two little
> > satellites plus a woofer) on the insistence of a local ham and it
> > sounded like total and complete crap to me. Of course I was biased
> > going into that test too :-).
> >
> > My new favorite antenna is a two-turn electrostatically shielded (e.g.
> > in copper pipe with an insulating joint) 2.5ftx2.5ft loop in the
> > attic, hooked up to my 390A via Twinax. Far and away this is the best
way
> > to suppress local QRM/RFI, even if it is not as sensitive as a longwire.
> >
> > Tim.
> > _____________________________________________________________
> > R-390 mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/r-390
> > Help: http://mailman.qth.net/faq.htm
> > Post: mailto:R-390 at mailman.qth.net
> > Unsubscribe: http://mailman.qth.net/mailman/options/r-390
> >
> _____________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/faq.htm
> Post: mailto:R-390 at mailman.qth.net
> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>