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[jesunset]

I am upgrading a large residential landscape sound system. In the landscape system there are eleven old mushroom speakers being driven off of a SonAmp 260 output to a "Thindy" interface that drives the speakers at high impedance.

Because of the wiring scheme I am going to continue the 70V approach but have upgraded the speakers to Tannoy AW6 TDC drivers and Tannoy transformers.

Question is about the Thindy. I can't find any specs on this unit.  Should I continue to use it with a better low impedance amp or just replace the whole enchilada with a better 70V amp. Any suggestions about the better sounding 70V amps?  
Jon

[Ron Hebbard]

Hello Jon;

You piqued my curiosity, I'd no idea what a "Thindy" was.

Check this:  http://www.adelcom.net/OWIHome1.htm

Thindy      Model 2300
Ivory Finish

Indoor Flush Wall/CeilingPlacement

2 Way System.
5" x 5" Dynapleat Woofer with a 1.5" Dyna-Ribbon Tweeter.
30 Watts/Channel RMS - 60 Watts/Channel Maximum.
50 Hz. - 20 KHz. Frequency Response.
4 Ohms Impedance.
85 dB 1W/1M Sensitivity.
9" H x 9" W x 1.5" D Dimensions.
Available in Black or Ivory Grille Colors.

And this:

Thindy II  Model 2301
Ivory Finish

Indoor Flush Wall/CeilingPlacement

5.25" Honeycomb-Ring Driver.
30 Watts/Channel RMS - 60 Watts/Channel Maximum.
65 Hz. - 20 KHz. Frequency Response.
4 Ohms Impedance.
90 dB 1W/1M Sensitivity.
9" H x 9" W x 1.75" D Dimensions.
Available in Black or Ivory Grille Colors.

Toodleoo!
Ron Hebbard

[Hal Bissinger/COMSYSTEC]

I've never heard of a "Thindy" either. I'm sure it is nothing more than a transformer, 4 or 8 ohms to an impedance dependent on the amplifier power to provide 70.7 volts at full output.

I know nothing of that amp either, probably consumer gear. There are plenty of amps out there that will drive a 70 volt line directly without a transformer and that's always a good thing for better low frequency response. If you are looking for quality you can't beat Crown, check out their CT-S series.

-Hal

[Don Boone]

TOA has been a leader in 70 volt for decades. I know of plenty of TOA amps that are still working after decades of 24/7 operation. We use hundreds of them.

I liked the now discontinued Crown CT series that used rail switching to convert to 70 volt operation. Some of the newer Crown amps use a similiar design but I don't have the same warm fuzzy feeling about Crown since Harman swallowed them.

Don

[Tom Bourke]

Hal Bissinger/COMSYSTEC wrote on Mon, 27 June 2005 18:01

I know nothing of that amp either, probably consumer gear. -Hal

I use to work for an electronics store that sold Sonance.  They made the Sonamp you are talking about in 2 versions  the 260 and 360.  The only difference was the 360 had a 3 output selector switch built in.  The amp was meant for the home install market. I own a 360.  I use it for driving home subs.  As I recall it was 2 ohm stable rated 60wpc@8ohm  100@4 and 120 or140 @2.  It is a very gutsy little amp intended to drive multi rooms at once.

Tom