Good day to all
First of all, I would like to wish to all members a Happy, Prosperous, Peaceful and Healthy New Year.
Very recently, I acquired a Hafler XL-600 from ebay (it is still in its way to my home). This is the third XL-600 I am getting hands on. I had bought two others back in the early nineties. I modified/upgraded the first with the - then - PA-1 modification kit of Musical Concepts. 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-500
ones. Till today, I have not regret it.
I purchased one more XL-600, 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-600, but now it is too late for tears.
Therefore, at this time, I am going to have a modified/upgraded XL-600 and one more unmodified, as originally made. 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
use the non modified one for the middle and high frequnecies 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.
The minimum amount that I have to spend for a PA-4 modification is $250, which does not include the TP-500 twin transformers and the shipping expenses to Greece. Then, there are more PA-4 versions with cost rising gradually up to more than $2k, depending of course how far one wants to go.
I would appreciate your opinion on this matter.
Happy New Year.