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hafler

  1. retrosonic

    Hafler JF200/Fosgate RF200 Preamp+Crossover Who Knows About These, Please?

    Hello folks, I have several of these that were boxed away for many years. At some point—if memory serves, I think I was convinced everyone I cared about was going to needed a bi-amped system. So I collected them. Anyhoo, here they are in the light of day again and, low and behold, some of them...
  2. C

    Hafler P500 help

    Hello all! This is my first post on this forum after a lot of lurking; please let me know if I should make any amendments to the post. I recently came into a Hafler P500 amp which the seller stated had worked fine last he used it a few years ago. Before connecting it to any speakers I did...
  3. MiguelSarmi

    What to get?

    Hello everyone. Hope you are all alright. I need help choosing the following units I found for sale but cannot audition them as they’re all a while away from me. The choices I have will be paired with either a Boston Acoustics HD5 or Celestion 1 (no passive subwoofer) speakers. My studio...
  4. KingWzrd

    Hafler DH500 Channel Out Help Needed

    Hello everyone, I have a DH-500 that recently had the right channel stop putting out sound. I've read a few posts about ensuring the relay clicks when the amp it switched on (it does) and all fuses inside and the back are not blown. The light is normal on the front of the unit and the fan is...
    • KingWzrd
    • Thread
    • adcom amplifier diagnosing diagnostics gfa-555 hafler
    • Replies: 5
    • Forum: Solid State
  5. C

    Hafler DH500 burnt components

    So I bought this unit in original box, from an estate sale with other gear. I hooked it up and got music through both channels, although when powered on I could hear a slight Humm, from the unit, not from either channel. So last night I pulled the cover to blow out any dust and see if it had any...
    • Crudbud
    • Thread
    • dh500 hafler
    • Replies: 5
    • Forum: DIY
  6. Scott March

    First Time Amp Repair - Sourcing Mosfets

    Hi All, I decided to try my hand at Amp Repair as a hobby. Just picked up a Hafler SE240 that has a blown channel. Took a look. MosFets are definitely fried. Going to continue diagnosing the other components. My question is that its using 2SJ161/2SK1057 pairs that don't seem readily available...
    • Scott March
    • Thread
    • hafler mosfet amp
    • Replies: 6
    • Forum: DIY
  7. TubesGlo

    Hafler DH220 vs 220C Comparison

    Since for some odd reason there isn't a Dynaco / Hafler manufacturers sub forum I'll ask here. Has anyone compared an original DH220 to the Bob Cordell version? I've recapped my 220's PC19C boards and in basically stock form it sounds really good. I installed Musical Concept boards in my 500...
  8. D

    What fuse type should I use for my Stereo Power Amp?

    I have a Hafler 9270 Power Amplifier. It had recently blown a fuse due to an external short. The manual just says to replace it with a 7amp fuse. The blown fuse says the following: 250V 3/2 (or 312 wasn't clear) 7A. It does not specify time delay or any other type. Which one should I use?
  9. AdventDude

    Hafler XL-280 power problem (hoping for guidance)

    Greetings, A very close friend from high school convinced me to go the Hafler route many years back and I purchased both a DH-110 preamps and XL-280 (both in kit form) just about 35 years back. Though I've had a few minor connectivity issues arise over the past few years with the DH-110, the...
    • AdventDude
    • Thread
    • fuse hafler power repair switch
    • Replies: 10
    • Forum: DIY
  10. M

    Hafler DH-220 Strange "External Capacitor Bank" Mod?

    Hello Everybody! Exxtreeemely long time lurker here Very quickly, let me introduce introduce myself. I've been lurking on here for years, and I've gleaned so much valuable information from you guys and gals! I just want to say thank you for the absolute treasure trove of valuable information...
    • MicahVW
    • Thread
    • dh-101 preamp dh-200 dh-220 filter capacitors hafler mods musical concepts power supply
    • Replies: 13
    • Forum: Solid State
  11. I

    Hafler 9505 versions

    Been looking to maybe purchase another Hafler 9505 and have come across a couple different variations of the amp. Before looking I wasn't aware there were different versions. From what I've seen some have the XLR connectors on the top, others have them on the bottom. Then some have the speaker...
  12. D

    HAFLER DH-101 Recap w/ Help From eBay Seller - an AK Connection

    Hello Evereee Bod-dee! I just got done recapping (and retransistoring? and repower supplying?) my dad's HAFLER DH-101 preamp he bought off eBay about a year ago. It's already been a year ago? Man, time flies! Anyway, I bought three kits off eBay from a seller who has been mentioned here at AK...
    • drp1003
    • Thread
    • dh-101 preamp hafler hafler dh-101 halfer preamp
    • Replies: 8
    • Forum: Solid State
  13. I

    monoblock system set up questions

    I have a HK Citation 17 preamp paired with a Hafler XL280 w/ Musical Concepts PA-200 dual mono power supply mod. The XL280 is rated at 145 wpc at 8ohms. The amp is powering four speakers via the HK "special connecting cable". The cable connects to the speaker outs on the amp and routes it back...
  14. mymonkey

    Hafler DH-110 preamp refurb

    I'm new to power amp / pre amp separates. learning fast, picked up a Hafler DH-110 pre and took a chance that it was in good working order to find it quirky with static and low signal in one channel. Switches are worn more than i would like and although the unit is a tank, I know i am not...
  15. thorpej

    Odd behavior doing a slow-bring-up of a Hafler DH-500

    A friend recently dropped off a Hafler DH-500 that he recently acquired in unknown working condition. It appears to be in very good original shape, modulo missing one of the speaker fuses. But because he knows it hasn't been powered up in some time, he asked if I'd do a slow-start on it to...
  16. mrhandlin

    Hafler DH-500 - bridge rectifier? recommendations?

    Thanks in advance for your help. It's great to be part of a community of like-minded individuals. I've recently recapped an old Hafler DH-500. It's a bit unusual in that it has the pc10a version of the boards which don't quite match the manual available online. Anyhow, I've recapped it and...
    • mrhandlin
    • Thread
    • bridge rectifier dh-500 diodes fred type bridge rectifier hafler snubber
    • Replies: 11
    • Forum: Solid State
  17. oldvinyldude

    Recapping Hafler DH200 and\or Hafler DH500 amps

    I want to recap each of these amps. I have the instruction\assembly instructions, but was wondering if anyone has a cap list?, as I only want to replace the likely faulty\out of spec devices. I plan on skipping any small value disk types, and the main filter caps (if they test ok). I am new to...
    • oldvinyldude
    • Thread
    • hafler hafler dh200 hafler dh500
    • Replies: 17
    • Forum: DIY
  18. M

    Choosing a silent power amp for control room

    I always loved my HAFLER P5000. What a powerful clean sound. One day a channel went out (the cooling design isn't so great). So I bought a crap alesis amp to get something quickly, but I hate it with a passion. So I'm looking now to find an amp, but I'd love to find something without a fan...
    • morganomega
    • Thread
    • choosing a power amp hafler power amp pro5000 silent power amps that sound great
    • Replies: 59
    • Forum: Solid State
  19. Zach Nelson

    Hafler DH-101 hum & crackle

    I have recently acquired a Hafler DH-101. It sat on a shelf at a local store for a while, so I'm sure it needs a good cleaning to start. Last night, I noticed the right channel sounding crackly/distorted. Not terrible, but enough to break up the treble. I walked into a different room for a while...
  20. Stavro

    Looking for a Hafler XL10

    Anybody have one? If they are unobtainable then are they easy to build? Thoughts and advice welcome.
    • Stavro
    • Thread
    • hafler hafler xl-280 hafler xl10 hafler xl600
    • Replies: 0
    • Forum: Solid State
  21. dlucy

    Which Carver and Hafler amps can be easily modded and produce 500 wpc?

    I've seen an eye-opening article on modding the M1.0t to much higher wattage and that makes me guess the other Carvers and Haflers can also be modded. My Kappa 8's are quite happy with the 200 wpc high current HK PA2400, but I'm picking up a pair of RS-II's soon and want to find a low priced...
  22. L

    Preamp trouble? Ideas?

    Howdy! I've been using a Hafler P3000 amp with a Spectro Acoustics P-101 preamp, with pretty satisfactory results. However, a couple of weeks ago, I cranked it a bit louder than normal (about halfway) and PFFFT! The left channel died and smoke rose ominously from the Hafler. I pulled it...
  23. JordanTakacs

    Hafler p50 phono stage

    Hey there. I'm looking into the hafler p50 to pair with my Rega Rp40 TT and bronze ortofon. I am currently driving with Creek obh-21 headphone amp and beyerdynamic dt 1990s but would also pair with my totem rainmakers. Hoping to hear any past experience with the phono stage. The good and the...
  24. MKG

    Hafler DH-200

    Picked up a Hafler DH-200 at an amateur radio swap meet today. Don’t know anything about it and don’t know if I under or over paid, but I decided it was worth $60 to me (it’s hard for me to turn down a new project). I’m looking forward to doing some research on AK tonight to learn all about it...
    • MKG
    • Thread
    • amp dh-200 hafler
    • Replies: 65
    • Forum: Solid State
  25. J

    Trying to measure twice and buy once - Advice on preamps, please.

    Hello All, So I have been googling and reading until my head hurts, I want to purchase a new preamp; and don't have the budget to make the wrong choice. (hence I seek your help). OK, So about me, my current system is, from source to sound: a Rega P5 (modded - groovetracer subplatter, TTPSU...
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