Phone Systems


Previous Thread
Next Thread
Print Thread
Rate Thread
Page 2 of 2 1 2
Re: 25volt vs 70volt [Re: teldata1] #633435 10/23/19 12:54 PM
Joined: Feb 2010
Posts: 348
T
teldata1 Offline OP
Member
OP Offline
Member
T
Joined: Feb 2010
Posts: 348
I am just trying to get some feed back on why this is not shutting the 35 watt amp down

I did notice that the volume on the amp is low


so I will remove the 8 ohm speaker & replace it with another similar speaker and I will replace the 35 watt amp with 100 watt amp

They will need more speakers in some of the class rooms so I am planning on changing all the hall way speaker to 2 watts and class rooms to 1 watt or less its an odd building

very small class rooms and the ceiling in the hallways are only about 7 feet high all hard ceiling with some access panels


The part I don't understand is does it make a difference on the 25V (which they are currently using ) or 70v which I have always used when its just one zone

This is all one big loop


The amp is actually in the main building there is just a pair of wires that come across to the speakers
they have a Viking clock control tone generator attached to it as well

I think they are trying to use the speakers to hear the page in areas where they need another speaker


Thanks for all the response !!

Telephone Equipment Search
Re: 25volt vs 70volt [Re: teldata1] #633498 10/26/19 07:17 PM
Joined: May 2007
Posts: 4,701
Silversam Offline
Moderator-1A2, Cabling
*****
Offline
Moderator-1A2, Cabling
*****
Joined: May 2007
Posts: 4,701
25 Volts is not as efficient as 70 Volts. If you're running 70 Volts and the Amp is bigger than 100 Watts it MAY say on the back by the wiring terminals "Class 1 Wiring required". If it does then you should be running conduit or armor for the speaker wire and the amp and speakers should be in a registered enclosure etc. (In other words treat them as if they were 120Volt electrical appliances!)

If the amp says "Class 2 wiring acceptable" then no conduit is required. 25 Volt was created to handle those situations, since it is NEVER Class 1 wiring.

I haven't seen much 25 Volt stuff in the last 20 years.

European PA is usually either 100 Volts or 200 Volts (sometimes 50). Here in NYC we occasionally get a European company who'se opened an office and has spec'ed European PA equipment. We install it, but treat it as Class 1 wiring.

The long and the short is: Run 70 Volts wherever possible.


Sam


"Where are we going and why are we in this hand basket?"
Page 2 of 2 1 2

Moderated by  metelcom 

ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Most Recent 5 Post
IP office and remote IP phone
by High Mesa Communications - 11/13/19 12:26 AM
programming hunt groups on a DK424
by ALB300 - 11/12/19 10:01 PM
Avaya/Lucent MLS 12/18D
by Will H - 11/12/19 09:05 PM
Pri Issues
by Bushmills - 11/12/19 07:38 PM
Tesing TAPI on ESI with VIP7 Software
by bmsjeff - 11/11/19 07:42 PM
Who's Online Now
42 registered members (mike b, nlodoen, RedBul, gelehu, newtecky, jknichols, pvj, lizhou, dans, 304Tech, Skunky, mbhydro, Peter P., hawk82, hitechcomm, MooreTel, NTlayoff, Bull Tone, vicbob, JBean3329, justbill, metelcom, Curlycord, BobRobert, usedphones, nortelvoip, hbiss, pdxjim911, Professor Shadow, Coral Tech, dexman, Touch Tone Tommy, Mercenary Roadie, tripod.qc, RATHER BE FISHING, Yoda, jeffmoss26, High Mesa Communications, mreilly, Southernphoneman, PortlandTech, Bob3470), 1,247 guests, and 681 spiders.
Key: Admin, Global Mod, Mod
Tech Support Line 1.800.766.3425
Over the Phone Tech Support for your Phones and Business Phone Systems
Popular Topics(Views)
Newest Members
bmsjeff, Reese Jacobs, lizhou, BangorUni, ThomasD
49172 Registered Users
Forum Statistics
Forums62
Topics93,027
Posts632,767
Members49,172
Most Online5,661
May 23rd, 2018
Today's Birthdays
Bob Proffitt, JADAMS251, Paul Griffiths
NEC DX-40 PKG $299
NEC DX-40 PKG $299
EMP & Lightning Home Surge Protection
EMP - Click Here!
Top Posters(30 Days)
dexman 25
RedBul 15
Daniel 10
POLYCOM SOUNDPOINT 10 Pack
FREE Voip Phone - Click Here!
50% OFF Most All Phones
FREE Voip Phone - Click Here!
RESPONSIVE WEBSITE DEVELOPMENT
Free Phone Repair Diagnostic
EMP Shield for Commercial - Home & Vehicle
Use Coupon code SAVE - Click Here!
Servpro Ventura 24-Hour Emergency Service
Free Estimates call us now 24Hours
Contact Us | Telephone System Tech Support | Terms of Service

Sundance Communications is not affiliated with any of the above manufacturers.
©Copyright Sundance Communications 1998-2019
Trusted Partners
Sitemap