Apogee Centaurs- going active
I have just built two 2 channel symasym amps and shoe-horned them into the stands of my Apogee Centaurs, removed the factory crossovers and have connected a 2-way minidsp and presently trying to...
View ArticleSquarewave
Im trying to set a voltage source to give me a square that is +1/-1V. I have got the supply to go from +1 to 0, but I cant work out how to make it negative. Is there some way of adjusting the y axis?
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OPA827 + Diamond Buffer
Simple diamond buffer based on a WJ design. Enclosed in the feedback loop of an OPA827. DB open loop distortion is 0.0006xx% THD20 at 2Vrms into a 250 Ohm load. Enclosed in the OPA827 feedback loop...
View ArticleAlesis RA-300 - fix or throw?
Hi. I'm new to the forum, and not exactly a pro when it comes to amps in general! My old Alesis RA-300 amp keeps clicking in and out (i.e. sound goes for a few seconds, then returns - seemingly more so...
View ArticleGood Evening
After a recent camping excursion and exposure to horrible audio, I have regained interest in making a battery powered amp/speakers in a box thing. It was recommended I come here and have a look around...
View ArticleRCA PA amp ...
Hi Guys, I have an old RCA SA752 amp, without much of the schematic... I checked and replaced the out of value resistors, and most of the caps,,, Just taking a shot in the dark here, to see if anyone...
View ArticleWhat type of amp set-up for single 2-way speaker
Ok, been searching for hours for an answer to this. I'm planning on gutting an old 1 speaker vintage radio and updating it with some new internals which will most importantly include new speakers and...
View ArticleTHE GAP - Down Firing Ports (& Subs - more or less)
I know this has been discussed briefly before, but I want (hopefully) to address a new aspect of it. It is becoming more common for speakers, bookshelf and floorstanding, to have Down Firing Ports,...
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FS: Epcos Caps
I have for sale a pair of Epcos caps. I was going to use them to replace the caps on a Acurus A250 amp but the amp blew one of the channels so I could not use them... The asking price is $90 plus...
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Adding a Linkwitz transform to my woofers
Hi All, I finally finished my audio rack so I could put my system back together. I was running JBL E140 15" drivers in my bass cabs but they just didn't work well. I just happen to have them on hand. I...
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Building a power supply. Need some help
I'm building a power supply that I want to run wires and plug into where a 3 leg regulator is currently stationed. I just want to verify where the wires go. The transformer I am going to run in...
View ArticleWhat finish for LX521 flatpack?
Hi all, I want to build the LX521's from Madisound's flatpack: The Madisound Speaker Store I'm a total woodworking newbie. What options are there for an idiot-proof, easy way to finish the wood? Stain?...
View ArticleVifa NE225W-08
I have a few, but for now only selling one pair or 2 each of: http://www.parts-express.com/pe/show...mber=264-1138# Vifa NE225W-08 8" Subwoofer Speaker I would like to sell them as a pair. $175 for the...
View ArticleLowering earth impedance--Earth spikes in Russ Andrews Book
My friend pass me an ancient copy of the Russ Andrew book--Power and Glory . There is a short paragraph on placement of 4 earth spikes that are linked to a central earth spike . My friend did the earth...
View Article2ST5949 TO3 STMICRO transistors
New parts sold with insulators $12.00 each great sub for many vintage Japanese amps Use with the 2ST2121 shipping $6.00 in the US 48
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WR.30 speaker kit with Obbligato plus Dueland resistor build.
WR.30 speaker kit build kit price is $480.00 plus the cost of the Parts Express cabinets I used the curved Piano black for this build. CSS WR.30U7 WR.30 MTM Loudspeaker kit with upgraded caps,...
View ArticleUltra-Linear vs. Pentode Longevity
When maximizing tube life, for each of the following tubes, is pentode or UL better? I hear mixed opinions. -KT120, KT90, KT88 -EL34, 6L6, 6V6, EL84
View ArticleKicker 750.1
does anyone have a termianl block for this amp or does anyone know where i can get 1?? I need the terminal block for the power ground and remote the black plastic around them has melted
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Alpair 10.3 build
Hey guys, Just wanted to share a little preview of an Alpair 10.3 build. This is a set of speakers designed by my father and I. Alpairs 10.3s should arrive tomorrow and I am thrilled to hear to them....
View ArticleAn interesting blog
http://web.archive.org/web/201201281...ch-fun-anymore Look at all the replies with people who feel the same way!! GAMES MADE TODAY ARE COMPLETE TRASH COMPARED TO STUFF WE HAD IN THE 80s.. No doubt...
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