Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => SR Forum Archives => Installed Sound/Contracting FUD Forum Archive => Topic started by: jesunset on June 26, 2005, 11:03:33 AM
Title: 70 volt interface "Thindy"
Post by: jesunset on June 26, 2005, 11:03:33 AM
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
Title: Re: 70 volt interface "Thindy"
Post by: Ron Hebbard on June 26, 2005, 10:08:45 PM
Hello Jon;
You piqued my curiosity, I'd no idea what a "Thindy" was.
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
Title: Re: 70 volt interface "Thindy"
Post by: Hal Bissinger/COMSYSTEC on June 27, 2005, 07:01:12 PM
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
Title: Re: 70 volt interface "Thindy"
Post by: Don Boone on June 28, 2005, 07:48:08 AM
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
Title: Re: 70 volt interface "Thindy"
Post by: Tom Bourke on July 02, 2005, 09:38:21 AM
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@8ohm100@4 and 120 or140 @2. It is a very gutsy little amp intended to drive multi rooms at once.