Low power amplifer recommedation for Altec 511B horn

[amandarae]

I think he's bi-amping; if so, there's no crossover between the amp and driver. I was afraid the headphone amp wouldn't drive the 8 ohms properly, but bowtie427ss pointed out that 1W probably wasn't going to get the job done with a 902.

There should be a crossover somewhere. In this case, a line level type. As for the 902 using 1W at 104dB, wonder why that is not enough especially using a line level XO which makes the full 1W is directly behind the driver.