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Re: Hafler DH-200 Questions

I've reset the bias to 250mA (It was at 145mA)
It now sounds a lot better and is really quite listenable.
Compared to my Sugden A28B, the DH-200 has more authority in the bass but doesn't match it the initial attack of a sharp note, detail in the highs, cleanliness in the mid range or openness.
It sounds as though the capacitor mods you suggest will be just the thing to improve it in all these areas.

PS 1 It has a very slight directly radiated transformer hum which most people might not notice but I'm real fussy. I'm going to see if I can do anything about it and would welcome any suggestions.

PS 2 A friend tells me he had one that he succesfully ran with the bias current cranked right up to about 500 mA. Apparently it sounded a lot better but the heat sinks were almost too hot to touch! Any comments?


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