Are you trying to integrate music into the phone system? If so check with Bogen, I think they have adaptors for those situations....even if there are inputs labeled phone on the back of the amp. Some required special adaptors. Damon Brunger Telrad Electronics Fort Wayne IN ----- Original Message ----- From: "peter kowalik" <pe.kow@xxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Thursday, April 28, 2005 10:20 PM Subject: [TechAssist] Re: 70 volt line audio amp > Mark There is a good article on 70v speaker systems at > www.ticcorp.com/70v_guide.htm Peter Kowalik Keith's Stereo Burl ON > pe.kow@xxxxxxxxxxxx > > -----Original Message----- > From: techassist-bounce@xxxxxxxxxxxxx > [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of markbrock > Sent: April 28, 2005 2:44 PM > To: techassist@xxxxxxxxxxxxx > Subject: [TechAssist] Re: 70 volt line audio amp > > > brand new amp, works fine with one speaker and a mic, on the bench, but > when attached to the phone system, has distortion, I tried to blame it on > the phone co because if I disconnected them it worked ok with one speaker, > no there pointing back at me, I need more ammo before I go further, wish I > had a spare amp to try out. old amp has blown output ic and one of the two > filters popped its lid, I was just wondering if this 70 ohms of resistance > was going to be way off base , but apparently doesn't surprise anybody yet, > so I'll go a little farther. > Brock Electronics > R.R.4 box 237 > 5208 cr.3385 > Independence Ks. 67301 > 620-331-0235 > fax 331-7191 > > markbrock@xxxxxxxxxxxxx > Zenith*Philips*Peavey*Fender*Crate > we work on all brands,makes,models > of anything that plugs in the wall > ----- Original Message ----- > From: "becyn" <becyn@xxxxxxxxxx> > To: <techassist@xxxxxxxxxxxxx> > Sent: Thursday, April 28, 2005 9:43 AM > Subject: [TechAssist] Re: 70 volt line audio amp > > > > Divide and conquer ! > > > > Have you bench tested the amp with a 1Khz sine? > > It sounds more like the amp than the line. > > Many of those mutiple speaker setups have the taps set for a > > watt or less, so underpowering isn't an issue. > > > > Jim McVey > > McVey Alltronix > > 327 Broadway > > Newburgh N.Y. 12550 > > > > "If it doesn't play... > > CALL MCVEY !!!!!!" > > Factory authorized > > service for over 20 > > major brands. > > 845 561 8383 > > (Last of the Mohegans) > > > > > > > > > > markbrock wrote: > > > > >ok, whats the limit of resistance I can have at the amp using a 70 volt > > >line, I have around 70 ohms, unit is very distorted, 40 watt system > about > > >15 speakers, old unit burned up, they bought a new one and its all > > >distorted, then they called me, I figured someone hung a regular > speaker > > >on the line but that would be closer to 16 or less ohms, is 70 ok ? > they > > >may be under powered but it worked fine for 10 years previous. thanks > > >brock > > > > > >Brock Electronics > > >R.R.4 box 237 > > >5208 cr.3385 > > >Independence Ks. 67301 > > >620-331-0235 > > >fax 331-7191 > > > > > >markbrock@xxxxxxxxxxxxx > > >Zenith*Philips*Peavey*Fender*Crate > > >we work on all brands,makes,models > > >of anything that plugs in the wall > > > > > > >--------------------------------------------------------------------------- > -- > > >This Email List is Public. 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