Digital Audio Workstation & MIDI > Gear Zone for Musicians
Speaker Treatments & Cleaning Pots
FdB:
Thanks Protools5LEGuy.
Appreciate the comments and insights. Have used De-Oxit and other electronics cleaners almost exclusively in the past. But, on the miniature pots and especially on the much older vintage portable amplifiers… the alcohol and syringe method seems warranted… at least for a one-time big cleaning effort.
I also additionally considered just a little bit of the De-Oxit (and similar cleaners with some lubricant) applied, after the alcohol method - to reduce friction and wear on the pots. I still do not like the oily residue left by such cleaners on circuit boards and ofen use denatured alcohol for that cleaning. Dust covers and yearly, compressed air blow-outs need be employed.
Hopefully, no pots here will need eventual replacement - but your Japanese pot suggestion will be considered as is necessary.
The Visaton LTS 50 speaker treatment is much like your latex. The LTS 50 seems like somewhat-diluted Elmer’s Glue or some other aliphatic resin-based compound. Yet, it may in fact be latex? And I will have to recheck my ears for that low-end increase. Seems that treatment would somewhat restrict cone movement / flexibility and thusly reduce bottom-end bass response… but I may be mistaken.
40+ year-old speakers and pots may need more than a traditional & typical approach?
Protools5LEGuy:
--- Quote from: FdB on January 03, 2020, 12:16:57 PM ---I still do not like the oily residue left by such cleaners on circuit boards and ofen use denatured alcohol for that cleaning. Dust covers and yearly, compressed air blow-outs need be employed.
--- End quote ---
If you dont like that oily residue is a bad thing. "Wet" pots have longer lifespan. "Eternal" pots are those that are sealed.
--- Quote from: FdB on January 03, 2020, 12:16:57 PM ---
The Visaton LTS 50 speaker treatment is much like your latex. The LTS 50 seems like somewhat-diluted Elmer’s Glue or some other aliphatic resin-based compound. Yet, it may in fact be latex? And I will have to recheck my ears for that low-end increase. Seems that treatment would somewhat restrict cone movement / flexibility and thusly reduce bottom-end bass response… but I may be mistaken.
--- End quote ---
When you hit with the nail the paper, on an untreated cone you hear "Click click". With the treated you hear "clock clock". It gains body and looses some high frequencies. On a guitar amp you usually prefer that. Treble is not needed on a woofer cone.
Protools5LEGuy:
--- Quote from: Protools5LEGuy on January 03, 2020, 02:09:33 PM ---
When you hit with the nail the paper, on an untreated cone you hear "Click click". With the treated you hear "clock clock". It gains body and looses some high frequencies. On a guitar amp you usually prefer that. Treble is not needed on a woofer cone.
--- End quote ---
Just like when you tune a snare, it is subtle, but there is different pitch on every screw.
FdB:
Well, it seems that there are possibly injectable liquid forms of DeoxIT that could be used for the mini-pots - and after the thorough flushing of 25 year-old & older pots (in the case of the vintage portable amps)… with more efficiency and without the usual waste normally attributed to the attempted use of the aerosol cans into such small pot openings. So… a good thorough flush with injected alcohol followed with a small amount of injected liquid DeoxIT afterwards for just that little bit of lubrication… and without getting it everywhere and all over everything else. AND, maybe not really all that expensive when you consider how long it might actually last as an injectable liquid. I can accept this as an adjunct to the alcohol flush for the older pots when attempting renewal of older amplifiers.
Concerning the bass response question… in regards to speaker treatments reducing or increasing bass response. This was primarily concerning the vintage portable amps and their common 5” and 8” full-range speakers (bass, mids and treble response all-in-one).
I’ve two 8 inch, identical speakers - one treated and one un-treated. Eventually, I’ll use both in the same amp to test & record both individually and under the same conditions. Then, compare the curves from those recordings to arrive at a hopefully definitive answer. If such a difference amounts to really all that much.
Enjoyed the snare drum analogy - and now applied to a bass drum head… does the pitch / tone of a tightened bass drum not decrease the amount of bass as the head is tightened?
*And, of possible interest concerning your EV ZLX15P powered speakers: www.youtube.com/watch?v=XqIUkr7JuDM
Syntho:
I've gone through I don't know how many cans of deoxit in my time. I always have a couple on hand. The last thing I cleaned was actually some HiFi equipment from the 80s. Cleaned up all the pots, switches and buttons and it works perfectly now.
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