Testing my 3.1TLs (sound is a bit off) and DRC measurements?
gwg_97
Posts: 332
The left channel on my new to me 3.1TLs sounds a little flat compared to the right channel. Also, vocals appear to be slightly skewed to the right. I upgraded the crossovers with Clarity Cap ESAs, but left the old 55mfd cap in the left crossover because one of the two 27mfd caps I received for that crossover had a bad lead. I fired up my system and heard a pretty good "pop" but no magic smoke. I thought I may have blown a cap or something but the crossover seems (looks) fine. Also, I can't seem to find any DCR measurements for the 3.1 (i.e, not in the SDA manual or SDA sticky). Any help would be greatly appreciated.
System 1:Nakamichi PA-7Kenwood Basic C2Polk SDA 1C moddedSystem 2:Dynaco ST-70Polk Monitor 5B modded
Comments
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Ok, I'd say because the left one has the old cap in it and the right one has the new cap that's your issue. Not sure on the popping issue.
I personally would never have completed it until I had all the proper caps on hand.
H9"Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul! -
Ok, I'd say because the left one has the old cap in it and the right one has the new cap that's your issue. Not sure on the popping issue.
I personally would never have completed it until I had all the proper caps on hand.
H9
Yeah, that was my first guess. I should have waited but patience is not one of my strong points. I did measure the old 55mfd cap from the other crossover and it was 65mfd (15% off). Thanks for the quick reply!
System 1:Nakamichi PA-7Kenwood Basic C2Polk SDA 1C moddedSystem 2:Dynaco ST-70Polk Monitor 5B modded -
Is your amp common ground? What caps did you use?Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
I used my Carver A760x. I use the same amp on my 1Cs and they sound fantastic.
System 1:Nakamichi PA-7Kenwood Basic C2Polk SDA 1C moddedSystem 2:Dynaco ST-70Polk Monitor 5B modded -
Ok, I don't know if it is common ground or not, but since you have used it, would seem to be. So, what caps did you use? The popping may have been the result of something on the crossover shorting out.Political Correctness'.........defined
"A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."
President of Club Polk -
I used Clarity ESAs for everything and Mills MRA-12s
System 1:Nakamichi PA-7Kenwood Basic C2Polk SDA 1C moddedSystem 2:Dynaco ST-70Polk Monitor 5B modded -
I replaced the old 55uf cap (which measured 65uf) with two stacked Clarity ESAs (which measured 54.7uf) and the sound is much more centered. Let the break-in period begin.
System 1:Nakamichi PA-7Kenwood Basic C2Polk SDA 1C moddedSystem 2:Dynaco ST-70Polk Monitor 5B modded
