HAFLER XL 600 PDF

Very recently, I acquired a Hafler XL from ebay it is still in its way to my home. This is the third XL I am getting hands on. I had bought two others back in the early nineties. Later, I was so stupid to sell it. However I kept the second, which I upgraded with the newer PA-3B kit , plus the replacement of its original transformer with a pair of TP ones. Till today, I have not regret it.

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Very recently, I acquired a Hafler XL from ebay it is still in its way to my home. This is the third XL I am getting hands on. I had bought two others back in the early nineties. Later, I was so stupid to sell it. However I kept the second, which I upgraded with the newer PA-3B kit , plus the replacement of its original transformer with a pair of TP ones.

Till today, I have not regret it. I purchased one more XL, after having decided to drive my Infinity RS Kappa9 speakers a really good speaker but a difficult load with two amplifiers in a bi-amp vertical mode one stereo amplifier for each speaker. This should have been done in the past, of course, when I had the first and sold XL, but now it is too late for tears.

Intending to use both of them for the bi-amplification of the Infinities, I am in a dilemma which one to be used for the low frequencies and which for the middle and high ones. The upgraded and modified amplifier has some certain advantages over the non-modified one. It performs much better in the frequency range it has an extended range at both ends of it and it uses the dual toroidal transformers, which - theoretically - adds in the total power handling vs the non modified one.

Given these two main advantages, I am not sure if I have to use it for the middle and high frequencies, where the critical part of music exists, and have the non modified one for the low frequencies or use the non modified one for the middle and high frequencies and let the modified to handle the more power demanding low frequencies. There is of course one more option: Spend the money and modify the new amplifier. But I am not sure if this would be a wasting of money or not we are living in hard times, as you understand , in case that such a modification adds very little or nothing to a bi-amplification, if I have to choose one or the other option of driving.

My biggest concern with used equipment is that it first and foremost, perform at last as well as it did when it was new.

Amplifier components particularly electrolytic capacitors are likely to degrade over the years. Secondly, my biggest concern about any modification would be that it actually improve the audible performance of the piece of gear.

For example, they make any number of claims, but the claims themselves are given in poetic terms not technical terms. They provide no improved measurements to back their claims up.

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This formidable unit, which is rated to deliver watts per channel into 8 ohms from 20 to 20, Hz with no more than 0. Its rated output at the clipping point is watts per channel into 8 ohms, watts into 4 ohms, watts into 2 ohms, and watts into 1 ohm! It also has a bridged mono mode in which it can deliver 1, watts into 8 ohms or 1, watts into 4 ohms at the clipping point. The XL was designed to use some 30 dB less overall negative feedback than previous Hafler amplifiers, which contributes to its low transient intermodulation distortion tim and high stability.

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