tube amps

  1. Gooshe

    JBL-4311B’s

    Have a chance to pickup a pair of the JBL-4311-b’s with one of them having a tear in the woofer and the tweeter, the other one seems ok all on drivers, both mids seem ok too. They have the grey cabinets and come with grills. Have been sitting in the garage for many years and are in aged but not...
  2. Boston Tom

    Pilot 245A gear refurb project

    Hi all need some help acquiring info regarding a pilot 245A integrated Amp. Just got it opened it up looks to have some fried wiring issue coming off the pots. There is some rust water damage on a few of the pots but some may be salvaged. I plan on doing a full re-wire with all new tubes and...
  3. Kruds

    Inspire 6FLV Tube combinations, what are your favorites?

    I recently picked up a used Inspire 6FLV (2020) and I am exploring it's capabilities. I have seen some of the various comments about 6SN7 vs 6SL7, 5AR4 vs 5U4, NOS vs New, Chinese tubes, etc. but what I am looking for are any suggestions relating to your favorite tube combinations for this...
  4. ADClosson

    Can I build a Dynakit ST-35?

    Greetings, all. I've been living contentedly with an old Yamaha A-1000 that, with the capable guidance of AK members, I recapped and repaired a few years back. I still enjoy the Yamaha and will hang on to it, but I'd like to try something else for comparison's sake. Dynakit Parts looks like an...
  5. SimplySound

    Tube Amp Thoughts?

    I know this forum gets this question all the time... what tube amp should I buy? Well I'll ask the question in context to help perhaps frame it more accurately. I am running a pair of Dunlavy SC-IV's (91db efficiency) with a Rogue ST-90 (~90-100w/Channel). It sounds great and I've rolled it...
  6. J

    Crackling noise from speakers

    I have an Audio Research Ref 5 SE preamplifier and recently I have noticed an intermittent crackling noise from the speakers. The noise seems to be more on the right side. Are defective or old tubes the most likely cause. The tubes on this unit have got about 3,100 hours on them. Also, should...
  7. M

    Chinese 6J1 Fever

    so I ordered a cheap tube amp and built it. I get sound but it is distorted. Any ideas as to why?
  8. RogerMod

    When we bias a tube amp what are we measuring?

    There seems to be some confusion about biasing a tube amplifer. I would like to ask the readers here to give their thought on what are we adjusting and what are we measuring when we adjust a tube amplifer's bias. If one were discussing his amplifier with another person what would be the...
  9. weegee

    Where the old tube amps underpowered?

    I was looking at some old ads from the 1950's. The amps I saw were 10 to 30 watts with a few a little higher. Where the old tube amps underpowered?
  10. Stever521

    Looking for a good tube amp repair person in So. Cal Metro LA

    Hi all, I would like to know if anyone here has a recommendation for somebody to bring a Heathkit W-5M to a good working state. I found a great speaker guy in North Hollywood who did a beautiful job on the Janszen ZVS-2's, if anyone is interested he is at Gss Speaker repair in NoHo I can forward...
  11. Gary Mattis

    Fisher bias vs. Mod pot bias ?

    I had a thought about tube matching and separate bias pots vs. Fishers factory all bias the same set up , which is better ? , Is the output power match more critical then trying to bias match the ma readings through negative bias methods with separate pots ?, sure separate pots cures one problem...
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