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<blockquote data-quote="Peter Etheredge" data-source="post: 32686" data-attributes="member: 58">Re: 70v System vs traditional...Jason -I think that you&#039;re confusing what a &quot;traditional&quot; system is vs. another form of constant voltage system.&nbsp; A 100v system works in just the same way as a 70v system, with constant voltage amps and transformers on each speaker, to put things in super simple terms.&nbsp; A &quot;traditional&quot; system forgoes those transformers and runs at &quot;low impedance&quot;.&nbsp; I&#039;d wager that this old system was running in such a low impedance manner and since you say &quot;receiver&quot; I&#039;m assuming that was a home theater type deal.&nbsp; This means it was probably over driven as 4, 8ohm, speakers (assuming they were 8ohm each, which is pretty standard) produce a 2ohm load, while most home receivers are generally only made to handle 8ohms a channel, maybe 4 at best.So how to replace it?&nbsp; Well as always &quot;it depends&quot;.&nbsp; What volume and what fidelity are you trying to get out of this thing?&nbsp; If it&#039;s just background music going through some ceiling cans then sure, run it at 70 volt.&nbsp; You can get an affordable little constant voltage amp that will properly power everything and it&#039;ll make plenty of noise.&nbsp; However if you&#039;re going for loud, full range, lots of low end in your face RAWR LETS LIFT HEAVIER WEIGHTS type tunes, then I&#039;d suggest running a low impedance system off a &quot;real&quot; commercial grade amplifier that&#039;s rated at 2ohms a channel (one for each room).There still are so many variables though that without having been on the site and personally viewed and assessed the situation I&#039;d be wrong to say what the proper way is to go about it, however I hope this helps you get started in the right direction.-pete</blockquote>

[QUOTE="Peter Etheredge, post: 32686, member: 58"] Re: 70v System vs traditional... Jason - I think that you're confusing what a "traditional" system is vs. another form of constant voltage system. A 100v system works in just the same way as a 70v system, with constant voltage amps and transformers on each speaker, to put things in super simple terms. A "traditional" system forgoes those transformers and runs at "low impedance". I'd wager that this old system was running in such a low impedance manner and since you say "receiver" I'm assuming that was a home theater type deal. This means it was probably over driven as 4, 8ohm, speakers (assuming they were 8ohm each, which is pretty standard) produce a 2ohm load, while most home receivers are generally only made to handle 8ohms a channel, maybe 4 at best. So how to replace it? Well as always "it depends". What volume and what fidelity are you trying to get out of this thing? If it's just background music going through some ceiling cans then sure, run it at 70 volt. You can get an affordable little constant voltage amp that will properly power everything and it'll make plenty of noise. However if you're going for loud, full range, lots of low end in your face RAWR LETS LIFT HEAVIER WEIGHTS type tunes, then I'd suggest running a low impedance system off a "real" commercial grade amplifier that's rated at 2ohms a channel (one for each room). There still are so many variables though that without having been on the site and personally viewed and assessed the situation I'd be wrong to say what the proper way is to go about it, however I hope this helps you get started in the right direction. -pete [/QUOTE]

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