Hooking up two Topaz Isolation trans. in series?

Plugging 1 into another will not give you more current.
The only way to get "more" current is to use 1 transformer for 1/2 of the gaer and the other transfomer for the other 1/2 of the gear. If you have a hum problem, while using these isolation transformers, then it is due to some interaction between the gear plugged into the transformer and you would need to experiment to find out what is causing the problem. There have been many discussion about solving a hum problem, review them.

Thank you,
Chuck, thanks for telling me about the headroom issue. I will use the 1kva on the pre-amp instead of the amp. I will get a 2.5 kva for the amps.
Cford, I read on a post at audiogone were someone said they hooked two of these in series. I too was wondering about how the current would be increases by this as only so much current could go through the first topaz. But there is smarter people than I in the room when it comes to electronics. So I asked.
Also there are several pieces of gear that hum when not interconnected. It is a power problem in the house. I will get a electrician in here eventually. The topaz will help me isolate it and I can still use them after its solved.
Thanks, Rod

Thanks, Rod

You might consider running your entire system from one 5 KVA (or greater) isolation transformer so as to not bottom out your transformer. Check out my power filtration system in my system.

Cford, I read on a post at audiogone were someone said they hooked two of these in series. I too was wondering about how the current would be increases by this as only so much current could go through the first topaz.

Usually that is done for greater common mode noise rejection and not current handling. I bought six 1.5Kva Topaz transformers from a guy who used them all in series. I think each one has 146dB CM noise rejection and he wired them in balanced mode to up that to 220dB(if I remember correctly).

When sizing an isolation transformer, it is important to know the peak power (worst case) of all componants which will be attached and then multiply that by 2-3 times. Source componants such as a CD player vary very little with music levels, however, your amp may have an instantaneous peak power level of more than twice the level with no input.

While you can put selected componants on different isos, there is in general no advantage over using one properly sized for all. The one exception is you might consider putting the digital componants (i.e., CD) on a second smaller iso to keep them from contaminating the rest of the componants.

If you look at my system, you will see architecture and wiring diagrams of how I did this.