alper_yilmaz
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OK, here is an update!
Being the impatient man of the block, I could not keep myself till the weekend and ended up in an electronics parts store late in the afternoon and bought a bunch of different 5W resistors.
First, I soldered the 47-ohm resistors. Significant improvement in bass! Aydin Esen's "Anadolu" started sounding much stronger in the bass compartment. Anthony Jackson's bass on the opening tune and Dave Holland's on "Love's Haunts" were tighter and much more prominent than before. Thom Yorke's most recent album full of synth basses was quite satisfying. Herbie Hancock's version of "Norwegan Wood" also sounded fine in terms of the bass. However, when I listened to Pat Metheny's "Bright Size Life", Beatles "In My Life" and Sting's "A Thousand Years" and "If I Ever Lose My Faith in You", I felt like the bass did not sound as it should have. Particularly on Massive Attack's "Teardrop" the sub-bass performance was quite poor...
So, I unsoldered the 47-ohm resistors and soldered the 91-ohm ones. These came with significantly better results than the previous ones. I went over pretty much all the songs listed above and the results are quite fine. Also I swapped the output tubes (Siemens EL34s) with Electro-Harmonix 6CA7s and they have also improved the bass slightly.
For the time being, I am happy with the outcome of the exercise. Thanks for the very helpful suggestion, Steve.
Best,
Alper
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