upgrade

Hi everybody. I picked up a beautiful VTA ST-70 that was assembled by a lady named Sue in 2013 (signed in the chassis). It is set up to accommodate 8ohm speakers only. I want to hook it up to a pair of Klipsch Fortes which are 4ohm. Anybody know what I'd have to do to upgrade this on the amp...

I have a 1959/1960 Silvertone Model 2075 Console Stereo that has been working well aside from the turntable drive motor, scratchy volume pot, dial & indicator lights that are burned out, and poor bass response. I'm competent in electrical repair (following directions and the advice of others)...

I have a pair of Ohm L's that are in perfect shape but they are stock. I have been toying around with the idea of upgrading the woofer and getting the SBA attachment. Has anyone done this before? Is it worth it to replace the original woofer and also get the SBA or is it better to just leave...

Upgrade video of Ascend Acoustics Sierra Towers, V1 to ELX (easy and effective) Hi folks, Just upgraded my towers. They sound amazing. Upgrade was straightforward. 6 new drivers 1 new crossover total time about 2.5 hours Here is a video of the process of the upgrade of V1 Sierra Towers with RAAL...

Hello! I recaped a 790 sansui, don't working before recap. Now relay clicks, DBT show no shortcut, unit sounds Bad and once the volumen reaches 35-40%, distorsion is really Bad and finally relays click and sound go out. Dc offset is ok, about 3+5 mv, but bias is 45V!!!! On test point 5-6 & 5-7...

Some years ago I bought a Wilson Benesch Full Circle turntable but at the time could not afford the ACT 0.5 tone arm so fitted a Rega RB300 with a Shure V15VxMR (of which I now have 2 following an acccident which broke the stylus on one and the I had the whole unit replaced). The stylus was...

I have decided to do an upgrade and I would like the groups’s suggestion for the best under $2000 speskers. My amp is a Pioneer SX1050 and my current speakers are the KEF Q350. I am looking for better imaging, better staging and maybe better performance of higher frequencies while conserving the...

Just finished this nice Proton AM-452 recap/upgrade, following a detailed 2016 article on AudioReview italian magazine. You can find a quite accurate English G-translation here. .......... On top of the magazine suggestions I have replaced: all the electrolytic capacitors in the PS + bypass...

A little while ago (Fall, 2020), AK member @Phineas69 brought in a very nice AU-719 for a complete restoration and upgrade. PART 1: HEAD AMP CIRCUIT BOARD (F-3095) The F-3095 board contains the Head (Phono) Amplifier for moving magnet cartridges. Signal Path Components: In each channel...

Hi y'all This is my first time posting to AudioKarma so please let me know if I'm doing anything wrong. I'm thinking of upgrading my turntable set-up and don't really know where to start. Here's my current set-up: Turntable: Technics SL-1200 mk3 Cartridge: Nagaoka MP-110 Phono Pre-Amp: U-Turn...

hello AK'ers I´m working on a 2330b. previously repaired without succes. power supply recapped, new transistors, new relay, single diodes an double diodes as well preamp, phono recapped power amp recaped BUT after changed capacitors, transitors, new mj´s 95/96 output.... one chanlles refuses...

I often get asked why should one consider judicious increases to the capacity of a power supply. I typically respond as such: It can be argued that the power supply is in the signal path, it's essentially in series with the output stage and hence does impact the sound of an amplifier. Nelson...

Good morning, After searching the forums, I did not see a recap / upgrade BOM or other list posted. Yes, I can refer to the SM and get out the calipers and spec them myself, but my problem is time. There are the kits on that auction place, but goodness, they are seriously marked up! If a...

Hello AK'ers. I'm working on a beautiful 4430 unit. Promblems: When playing in MONO, left and right speakers sound (and sound amazing IMO) BUT when playing STEREO no sound... Well a Lot of noise and a very very low music volumen. I think someone tried to repair it before, but left a mess with...

Hey guys, just wanted to get some opinions here, any input would be greatly appreciated. My current set up is a pioneer sx-535 receiver, pioneer cs-500g speakers, and technics sl-3200. Where should I go from here for the biggest jump to upgrade sound? I feel like the synergy in my set up is...

This is the start of my latest Thorens TD-160 Project. Hope we can generate some good learning points and discussions for keeping these engineering marvels in top performing shape. Most of my updates will be via video links posted to my YT Channel and linked herein from time to time. Tips and...

I have a pair of original SDA-1's and was wondering what improvements can be expected from doing the SDA-1A mod to them. (I have the instructions from the old Club Polk) I have already upgraded to the RDO-194 tweeters. Is the SDA-1A upgrade really an improvement?

I have used a NAD 3020i as my amp the latest 10 years. I have not found any amp that can match its details and treble. Though, since trying a NAD 319 dedicated power amp in my system I realise that the 3020i lacks definition and power in the lower frequencies. I wonder if anyone has a...

I recently modified an MCS 3245 receiver to greater power output using a 3275 transformer and other modifications. It can be read in this thread: https://audiokarma.org/forums/index.php?threads/how-to-increase-power-mcs-3245-to-3275.968122/ The second conversion I did in that thread left me...

Hello AK'ers. I'm working pm power supply, and i was wondering about some changes: 1.- can i replace the ceramic caps with films caps? Foto Old one is the righ. 2.- the supply board has printed "1A 125V" on the fuses places. I actually can't find 125 v fuses. Can them be 250v instead...

AK member @McDee56's very nice Sansui AU-517 integrated amplifier received a complete restoration and upgrade. Note that due to the shared topology between the AU-517 and the AU-717, this current restoration/upgrade is very similar to the latter's detailed AK thread. Part 1: Tone Control...

AK member @greymatter 's very nice Sansui BA-3000 power amplifier received a complete restoration and upgrade; the restoration/upgrade of it's companion preamplifier CA-3000 can be found in this separate Leestereo's Restoration and Upgrade of a Sansui CA-3000']thread[/URL]. Part 1: F-2508 Power...

Hello AK'ers. I´m working on a AU-7900. before the recep: No short on DBT, no relay click After recap: No short on DBT, no relay click I recaped F2596 board, all 'litycs are new. All output transistors are new's, On Semi 93g/94g installed. Transistors TR601, 602, 603, 605 & 605 are new. Relay...

Hey all! Recently I have caught upgraditis. Currently rocking KLH 5s (which I will keep forever) with Erhard Audio Buddies and the Aretha. During my research I stumbled over numerous brands and Salk has definitely stuck out. Does anyone have advice on how to demo anything from Salk...

I got a simple player, Jensen Jta230. I did not buy it, was an accidental gift - a trophy. But, I have been using it for few years and got into a vinyl listening habit and am loving it So, looking for advice on upgrade. - Would i really experience an upgrade if i buy a $300-$400 player...