Might pull the trigger on Hafler Amps

Hafler DH 200 and DH500
I read mixed reviews online and just wondering any thoughts from Polks here. Thank you.
Godspeed,
D0661E

AVR:Pioneer Elite SC-07
Surrounds: RTis
2channel:Rti100 (carver driven
Sub:SVS PB12-Plus/2
Dedicated AMPs:Adcom GFA535, 2xCarver 1.5t, Carver m1.0t
Wsrn:Hitachi ultra vision LCD60, 32XBR400
PowerConditioner: MonsterC HTS5100
PS3, Toshiba HD A2, etc: SonySACD/ Panasonic gears DIVX.


MR3LIGION: Polkaudio; GSXR; E46; Reeftank;
Odyclub; Xsimulator; Sony; Zune; Canon

Comments

  • marvda1
    marvda1 Posts: 4,862
    i have owned the hafler dh 200, nice sounding amp you can fry an egg on.
    Amplifiers: Norma IPA 140, MasterSound Compact 845, Ayre v6xe, Consonance Cyber 800
    Preamp: deHavilland Ultraverve 3
    Dac: Sonnet Morpheus 2, Musical Paradise mp-d2 mkIII
    Transport: Jay's Audio CDT2 mk2, Lumin U1 mini
    Speakers: Rosso Fiorentino Volterra II
    Speaker Cables: Organic Audio Organic Reference 2
    Interconnects: Argento Organic Reference 2, Argento Organic 2
    Power Cables: Argento Organic Reference, Synergistic Research Foundation 10 and 12 ga.
    Puritan PSM156
  • motorhead43026
    motorhead43026 Posts: 3,892
    edited August 2017
    Beware of DC offset on Haflers of this vintage. I own a XL600 and it isn't going anywhere. These amps when freshened up are still very relevant.
    2 channel: Anthem 225 Integrated amp; Parasound Ztuner; TechnicsTT SL1350; Vincent PHO-8 phono pre; Marantz CD6005 spinner; Polk SDA2BTL's; LAT International speaker cables, ZU Mission IC's and power cables all into a PS Audio Dectet Power center.

    Other; M10 series II, M7C's, Hafler XL600 amp, RB-980BX, Parasound HCA-1500 amp , P5 preamp, all in storage. All vintage Polk have had crossover rebuilds and tweeter upgrades.

    The best way to predict the future is to invent it.

    It is imperative that we recognize that an opinion is not a fact.

    Imagine making politics your entire personality.
  • machone
    machone Posts: 1,471
    I have an upgraded DH500 and it is sweet.
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
  • doggie750
    doggie750 Posts: 1,160
    Machone-
    Is the stock DH500 not good enough? Why need the upgrade? Cost to upgrade? Is it simply changing the cap? Thanks
    Godspeed,
    D0661E

    AVR:Pioneer Elite SC-07
    Surrounds: RTis
    2channel:Rti100 (carver driven
    Sub:SVS PB12-Plus/2
    Dedicated AMPs:Adcom GFA535, 2xCarver 1.5t, Carver m1.0t
    Wsrn:Hitachi ultra vision LCD60, 32XBR400
    PowerConditioner: MonsterC HTS5100
    PS3, Toshiba HD A2, etc: SonySACD/ Panasonic gears DIVX.


    MR3LIGION: Polkaudio; GSXR; E46; Reeftank;
    Odyclub; Xsimulator; Sony; Zune; Canon
  • pitdogg2
    pitdogg2 Posts: 24,477
    edited August 2017
    yes caps do not last indefinitely, and in some amps will destroy anything downstream when they fail.
  • pkquat
    pkquat Posts: 742
    IMO the DH220 (P225) is better than the DH200. The DC offset is adjustable or easier to adjust on the DH220 vs the DH200. You can easily check the DC offset with a voltmeter.

    DH200's have been going for about $125, and often need some work even though they "sound great". DH220's have been going for $150-200 with minor to no work needed. I have a DH220, and IMO it punches above its weight, and I love the bass sound from it. A similar power newer Krell is more detailed but also a little harsh, and initially has more punch to start, but it falls off quicker than the Hafler. Similar power Parasounds have are more detailed, and IMO a step up. The bass is about the same, but there is a richness to Hafler I like. The Parasound wins though for the greater detail.

    They will get quite warm while idle. Make sure both sides are the same temperature. if you have an IR thermometer check the temps. It can be a sign things are out of spec. I forget what the base line temps are, but they are online somewhere, or in an AudioKarma thread. Some people tweak DH220's to run hotter and potentially sound better, but that can also age components faster so be ware.
  • machone
    machone Posts: 1,471
    doggie750 wrote: »
    Machone-
    Is the stock DH500 not good enough? Why need the upgrade? Cost to upgrade? Is it simply changing the cap? Thanks

    Good when new but most are 30 years old and need attention.
    The good news is Musical Concepts has been tweaking their upgrade kits for years and they will transform a Hafler.
    The cost is significant. With new driver boards, power supply caps and recommended replacement of the thermal overload switches you will be in around $710 if you do the work. Add around $200 if they do the install plus shipping
    I'm sure one could change caps and get it going but their driver boards move the Hafler into another class.
    Depending what you can find one for plus the upgrades you will have a killer amp for way less less than $1500.
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
  • Machone, do the boards come preassembled?
    2 channel: Anthem 225 Integrated amp; Parasound Ztuner; TechnicsTT SL1350; Vincent PHO-8 phono pre; Marantz CD6005 spinner; Polk SDA2BTL's; LAT International speaker cables, ZU Mission IC's and power cables all into a PS Audio Dectet Power center.

    Other; M10 series II, M7C's, Hafler XL600 amp, RB-980BX, Parasound HCA-1500 amp , P5 preamp, all in storage. All vintage Polk have had crossover rebuilds and tweeter upgrades.

    The best way to predict the future is to invent it.

    It is imperative that we recognize that an opinion is not a fact.

    Imagine making politics your entire personality.
  • machone
    machone Posts: 1,471
    Stuffed and tested with the bias and dc offset set close enough for power up.
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
  • kharp1
    kharp1 Posts: 3,453
    I have a pair of Hafler amps that will need work. One is a 220 and I thinkone is a 230. I know one is different than the other slightly, and if I recall, the 230 has Neutrik connections. Any one that is interested I'll move them CHEAP! I used the 220 for a while, but, noticed a pop through the speakers when I turned it on so I moved it to the side and never got back to it.
  • pkquat
    pkquat Posts: 742
    kharp1 wrote: »
    I have a pair of Hafler amps that will need work. One is a 220 and I think one is a 230. I know one is different than the other slightly, and if I recall, the 230 has Neutrik connections. Any one that is interested I'll move them CHEAP! I used the 220 for a while, but, noticed a pop through the speakers when I turned it on so I moved it to the side and never got back to it.

    The P230 is the later version of the "professional" rack mount version of the DH-220. The early version was the P225. According to Hafler the P230 has additional MOSFETS and larger power supply fuses.

    The pop or "thump" is normal for the DH-220 amps, and likely the P230. Usually they are turned on and left on. The DH-220 does not have relays on the speaker outputs. Relays were added to newer amps to prevent the thump. The click you hear after power up is the relays. Some high end amps today still don't have relays because they are considered something in the signal path and detrimental to sound for the purist. They are also always left on so they are at their stable state.

    Once the amps are on, you can check the DC offset with a voltmeter. Both the DC offset and bias are adjustable. on these. The DC offset is not too hard to adjust, but with the age likely harder to get perfect zero. Less than 10mV should be possible. I think I got mine to within 5mV. The bias really needs to calibrated meters, and is more difficult. Small movements to the pots create wild swings which take time to settle.
  • gp4jesus
    gp4jesus Posts: 1,969
    If I'm not too late, I have 2 Hafler XL-280s I'll let go. One w/ both channels working. The other, one channel stopped working, don't know why. No time to troubleshoot.

    Noteworthy audiophile stuff: The XL-280 came from the factory w/ many of the known worthwhile upgrades for the DH-200/220, etc. Of particular interest to some is a separate, complete PSU for the driver boards. Further, separate L&R transformer secondaries, bridge rectifiers, & PS filtering for the finals. The DH predecessors, to my knowledge, came w/a single PSU to handle it all.

    $225 for both plus shipping.
    Samsung 60" UN60ES6100 LED Outlaw Audio 976 Pre/Pro Samsung BDP, Amazon Firestick, Phillips CD Changer Canare 14 ga - LCR tweeters inside*; Ctr Ch outside BJC 10 ga - LCR mids, inside* & out 8 ga Powerline: LR woofers, inside* & out *soldered LR: Tri-amped RTi A7 w/Rotels. Woofers - 980BX; Tweets & “Plugged*” Mids - 981, connected w/MP Premiere ICs Ctr Ch: Rotel RB981 -> Bi-amped CSi A6 Surrounds: Premiere ICs ->Rotel 981 -> AR 12 ga -> RTi A3. 5 Subs: Sunfire True SW Signature -> LFE & Ctr Ch; 4 Audio Pro Evidence @ the “Corners”. Power Conditioning & Distribution: 4 dedicated 20A feeds; APC H15; 5 Furman Miniport 20s *Xschop's handy work
  • ^^good deal.
    2 channel: Anthem 225 Integrated amp; Parasound Ztuner; TechnicsTT SL1350; Vincent PHO-8 phono pre; Marantz CD6005 spinner; Polk SDA2BTL's; LAT International speaker cables, ZU Mission IC's and power cables all into a PS Audio Dectet Power center.

    Other; M10 series II, M7C's, Hafler XL600 amp, RB-980BX, Parasound HCA-1500 amp , P5 preamp, all in storage. All vintage Polk have had crossover rebuilds and tweeter upgrades.

    The best way to predict the future is to invent it.

    It is imperative that we recognize that an opinion is not a fact.

    Imagine making politics your entire personality.
  • kharp1
    kharp1 Posts: 3,453
    @pkquat Thanks for the info. Probably should pull them back out and check them out.
  • gp4jesus
    gp4jesus Posts: 1,969
    An addendum: 6 output devices per channel versus 4 per chnl for the DH 200/220.

    Bridgeable into 4 ohms. I refer you to the manual for comprehensive specs.

    It's no coincidence Musical Fidelity DH driver boards are VERY similar looking to the factory XL-280 boards.
    Samsung 60" UN60ES6100 LED Outlaw Audio 976 Pre/Pro Samsung BDP, Amazon Firestick, Phillips CD Changer Canare 14 ga - LCR tweeters inside*; Ctr Ch outside BJC 10 ga - LCR mids, inside* & out 8 ga Powerline: LR woofers, inside* & out *soldered LR: Tri-amped RTi A7 w/Rotels. Woofers - 980BX; Tweets & “Plugged*” Mids - 981, connected w/MP Premiere ICs Ctr Ch: Rotel RB981 -> Bi-amped CSi A6 Surrounds: Premiere ICs ->Rotel 981 -> AR 12 ga -> RTi A3. 5 Subs: Sunfire True SW Signature -> LFE & Ctr Ch; 4 Audio Pro Evidence @ the “Corners”. Power Conditioning & Distribution: 4 dedicated 20A feeds; APC H15; 5 Furman Miniport 20s *Xschop's handy work
  • machone
    machone Posts: 1,471
    Pull the trigger
    Mojo Audio Illuminati v3>>Quantum Byte w/LMS>>Rpi/PiCoreplayer>> Starlight 7 USB >> Mojo Audio Mystique v2 SE>>ModWright SWL 9.0 SE Signature>>Hafler DH-500 Amp+ (Musical Concepts Fully Modded)>>
    SRS 2.3TL (Fully Modded)...Velodyne Optimum 8 subwoofer
    1KVA Dreadnought

    Marantz SA 8005
    Pioneer PLX-1000 Turntable - Shure SC35C/N35X - V15III/VN35HE
    Yamaha TX-540 Tuner...Sony BDP-S570
    Sony PS4

    Separate subpanel with four dedicated 20 amp circuits.
    1. Amplification 2. Analog 3. Digital 4. Video

    "All THAT IS LOST FROM THE SOURCE IS LOST FOREVER"
  • doggie750
    doggie750 Posts: 1,160
    Zip code 94544. Total cost? Thank you

    gp4jesus wrote: »
    If I'm not too late, I have 2 Hafler XL-280s I'll let go. One w/ both channels working. The other, one channel stopped working, don't know why. No time to troubleshoot.

    Noteworthy audiophile stuff: The XL-280 came from the factory w/ many of the known worthwhile upgrades for the DH-200/220, etc. Of particular interest to some is a separate, complete PSU for the driver boards. Further, separate L&R transformer secondaries, bridge rectifiers, & PS filtering for the finals. The DH predecessors, to my knowledge, came w/a single PSU to handle it all.

    $225 for both plus shipping.

    Godspeed,
    D0661E

    AVR:Pioneer Elite SC-07
    Surrounds: RTis
    2channel:Rti100 (carver driven
    Sub:SVS PB12-Plus/2
    Dedicated AMPs:Adcom GFA535, 2xCarver 1.5t, Carver m1.0t
    Wsrn:Hitachi ultra vision LCD60, 32XBR400
    PowerConditioner: MonsterC HTS5100
    PS3, Toshiba HD A2, etc: SonySACD/ Panasonic gears DIVX.


    MR3LIGION: Polkaudio; GSXR; E46; Reeftank;
    Odyclub; Xsimulator; Sony; Zune; Canon
  • gp4jesus
    gp4jesus Posts: 1,969
    edited August 2017
    Final estimate ~$265?

    Based upon 60lb weight, crunching numbers at the USPS web site. Hafta box 'em up & head to post office.

    Samsung 60" UN60ES6100 LED Outlaw Audio 976 Pre/Pro Samsung BDP, Amazon Firestick, Phillips CD Changer Canare 14 ga - LCR tweeters inside*; Ctr Ch outside BJC 10 ga - LCR mids, inside* & out 8 ga Powerline: LR woofers, inside* & out *soldered LR: Tri-amped RTi A7 w/Rotels. Woofers - 980BX; Tweets & “Plugged*” Mids - 981, connected w/MP Premiere ICs Ctr Ch: Rotel RB981 -> Bi-amped CSi A6 Surrounds: Premiere ICs ->Rotel 981 -> AR 12 ga -> RTi A3. 5 Subs: Sunfire True SW Signature -> LFE & Ctr Ch; 4 Audio Pro Evidence @ the “Corners”. Power Conditioning & Distribution: 4 dedicated 20A feeds; APC H15; 5 Furman Miniport 20s *Xschop's handy work
  • gp4jesus
    gp4jesus Posts: 1,969
    doggie750 wrote: »
    Zip code 94544. Total cost? Thank you

    gp4jesus wrote: »
    If I'm not too late, I have 2 Hafler XL-280s I'll let go. One w/ both channels working. The other, one channel stopped working, don't know why. No time to troubleshoot.

    Noteworthy audiophile stuff: The XL-280 came from the factory w/ many of the known worthwhile upgrades for the DH-200/220, etc. Of particular interest to some is a separate, complete PSU for the driver boards. Further, separate L&R transformer secondaries, bridge rectifiers, & PS filtering for the finals. The DH predecessors, to my knowledge, came w/a single PSU to handle it all.

    $225 for both plus shipping.

    Yes? No? Maybe...
    Samsung 60" UN60ES6100 LED Outlaw Audio 976 Pre/Pro Samsung BDP, Amazon Firestick, Phillips CD Changer Canare 14 ga - LCR tweeters inside*; Ctr Ch outside BJC 10 ga - LCR mids, inside* & out 8 ga Powerline: LR woofers, inside* & out *soldered LR: Tri-amped RTi A7 w/Rotels. Woofers - 980BX; Tweets & “Plugged*” Mids - 981, connected w/MP Premiere ICs Ctr Ch: Rotel RB981 -> Bi-amped CSi A6 Surrounds: Premiere ICs ->Rotel 981 -> AR 12 ga -> RTi A3. 5 Subs: Sunfire True SW Signature -> LFE & Ctr Ch; 4 Audio Pro Evidence @ the “Corners”. Power Conditioning & Distribution: 4 dedicated 20A feeds; APC H15; 5 Furman Miniport 20s *Xschop's handy work
  • doggie750
    doggie750 Posts: 1,160
    edited August 2017
    I pass....I appreciate the deal though.
    Godspeed,
    D0661E

    AVR:Pioneer Elite SC-07
    Surrounds: RTis
    2channel:Rti100 (carver driven
    Sub:SVS PB12-Plus/2
    Dedicated AMPs:Adcom GFA535, 2xCarver 1.5t, Carver m1.0t
    Wsrn:Hitachi ultra vision LCD60, 32XBR400
    PowerConditioner: MonsterC HTS5100
    PS3, Toshiba HD A2, etc: SonySACD/ Panasonic gears DIVX.


    MR3LIGION: Polkaudio; GSXR; E46; Reeftank;
    Odyclub; Xsimulator; Sony; Zune; Canon