Rather than shelling out $70 or more for something like a Hammond 269EX, [Terry]’s suggestion is to modify an isolation transformer, specifically the Triad N-68X.

In the past, I have used a regular amp and wired the 8-ohm output into a very large 70-volt transformer, turned around. Now they are hard to find and pretty expensive, but a 50-watt or 100-watt ...

The Skinny: The latest news from Terra is that it has upgraded the 70-volt options it offers for its AC and LS series products. The Specs: Terra says the newly improved transformers double the voltage ...

The company points out the C8 ceiling loudspeaker employs a 1-inch pivoting tweeter, along with an 8-inch woofer. Pure Resonance Audio states the speaker incorporates a 60-watt, 70-volt transformer ...

The C6 features an easy-access 30-watt 70-volt transformer with an 8-ohm bypass, a 6.5-inch woofer, and an adjustable 1-inch tweeter–all designed for the best possible sound coverage in your space.