Eantala, Getting the first few watts of output power is crucial.For every 3db gain in efficiency, you are able to cut your amplification in half.10db, one tenth.The important thing to look at is that the higher the efficiency,the less power you will need to attain a similar SPL level.Most of the best audio gear is around 100w/ch or lower.If you need high quality and high power ,you will pay!
In your situation, even 90-93db efficiency would give your power amp 3-6db more headroom and would probably sound better in a direct comparison.Hope this helps-Tom
In your situation, even 90-93db efficiency would give your power amp 3-6db more headroom and would probably sound better in a direct comparison.Hope this helps-Tom