Videos tutorials documents manuals hafler ha15 professional solid state headphone amplifier. I use a 12au7 based triode preamp and i believe that a tube pre with a ss power amp makes the music much better. Ext patch from jacks twist around the new loop, stripping if needed. View and download hafler series 2 dh100 owners manual online. Hafler diagrams, schematics and service manuals download for free. All in all, since my brother built hafler kits on the kitchen table when i was a kid, they were quality components. Dh120 dh200 dh220 dh500 gx 2300 gx 2600 gx 2800 p p1500 p225 p230 p3000 p3100 p4000 p500 p505 p7000 pro1200 pro2400 pro6000 se120 se240 series 9 series 9180 series 9270 series 9303. If it could sound better it would probably take younger ears than mine to notice. Wired it up to my project xpression iiishure v15iii and jbl 6230kef c40 setup earlier this evening. All the switches are clean and work perfectly and were tested on a scope. Full text of electronics australia 1980 internet archive. Well i removed all the switch wiring and wired what i needed. If your contro doel uni nostt provide switching capacity sufficient for the amplifier 5 ams p needs plus other equipment it is als o switching, you should use the amplifiers own power switch. My musical concepts paspro 1 tube preamp is really making me happy.
Does anyone have a copy of the dh101 wiring foldout. Hafler dh101 assembly and operation instructions manual. Discussion in audio hardware started by veech, oct 15, 2009. Hafler dh220, very good condition original version. John, i want to thank you again for the superb preamp you built.
Hafler dh120 dh200 dh220 amp restoration kit repair service fix recap. The power switch fails, due to excessive inrush currents see fix below. This 30yearold sample easily put out 77 wpc continuous and 118 w burst power into 8. Stock hafler dh200 on the way to us now for your choice of mods080918. Dh102 installs inside the dh101, and converts the phono 2 in. Ac switching of most audio preamplifiers hafler, like the dh101. I thought i would start a thread on peoples experiences and tweeks for the hafler dh101. A lowhum 9 volt battery powered model will suffice, to ensure a clean phono signal to the dh101, which has one of the finest phono circuits ever made. The owners manual is used as an reference guide, instruction manual and instruction book. Happy paspro 1 owner paspro 1 link installed in hafler dh101 chassis with custom outboard power supply. This is a used david hafler 10band stereo graphic eq, model dh160, circa 1982. Scroll this the hafler dh220 is a two channel audio power amplifier designed to the very highest performance standards.
Hafler dh220 power amplifier may 25, 2012 may 25, 2012 3 minute read by admin. In 1954 david haflers 50 watt tube amplifiers shocked the audio world. Manuals list manuals for audio, music, stage and studio. Hafler dh110 solve device problem videos, documents. Dh100 dh101 dh110 iris se100 series 915 series 945. It is available either as a kit, or fully assembled. With this highpowered kit, david hafler attempted to do for solidstate amplifiers what hed already done for tubed designs with the dynaco stereo 70. We have 1 hafler dh110 manual available for free pdf download. The quality of the sound is enhanced with wide dynamics, sweet tonal quality and more precise soundstage. Face is very clean with a few small very small areas that have been touched up with the point of a. A few days ago i asked for opinions on the hafler dh110 preamp vs the nad 1020. He almost succeededthe dh200 proved an excellent platform for almost unlimited tweaking called poogeing by cognoscenti. Original volumebalance pot for dh 101 hafler preamp 11. Looks like the original rubber feet have been replaced.
Full manuals list manuals and schematics mr manuals. The hafler dh120 is a very high quality 60 wattsperchannel mosfet class ab stereo power amplifier. In addition to the stock phono stage, this unit includes the optional internal dh112 prepreamp for additional flexibility with moving coil cart. A in depth look at david hafler s dh101 preamplifier. The sockets on the back are not audiophile grade and they tend to bend everytime i hook a wire on it. Being 20 minutes away from john at musical concepts is a lucky break for me as he has helped me alot. The unit is rugged and functions well, with the exception of a missing rca jack on the right channel input, which could be fairly easily repaired by someone with moderate soldering iron skills and a trip to radio shack. Match with the best possible prepreamplifier if running a moving coil stereo pickup for lp playback. Although the hafler didnt have the balance of the other two, it was the only one that was not veiled. I had mentioned that i was going to pull the pre apart and rebuild with fancy capacitors and an upgraded power supply, etc. Mosfets are solidstate devices that work on principals more similar to vacuum tubes than bipolar transistors and it sounds great.
That drove me to put the dh101 back into the system. This was a kit version and i think somebody might have fat fingered a step. Hafler dh101 2 channel preamplifier euc black amp hifi audiophile. A lowhum 9 volt battery powered model will suffice, to ensure a clean phono signal to the dh 101, which has one of the finest phono circuits ever made. To get the paspro 1 tube upgrade in the hafler you need a 101 chassis.
A in depth look at david haflers dh101 preamplifier. The sound was probably being degraded by the old switches. Below you will found our manuals on the hafler dh101 kit. Download the hafler dh101kit manuals for free hifi manuals. This is a line stage and power supply upgrade kit for the hafler dh101 preamplifier with an optional phono stage upgrade kit available at the bottom of this listing. I was gifted a hafler dh101 preamp among other stuff last night, by my great uncle. In my experience, you plug it in, switch it on, select the right input and then rotate the volume control to the right volume and relax and listen. I have had my dh200 for 23 years and never any problems.
It did come out quieter than before, although i was also battling some substandard audioquest cables at the time. Hafler dh110 manuals manuals and user guides for hafler dh110. Hafler is the standard by which your work deserves to be judged. My dh220 with the musical concepts mods is breaking in beautifully. Hafler dh160 10 band per channel graphic eq from the mid 80s in excellent working conditionvery well built unit weighing in at a solid 8. I just bought a used dh101, what does the tone button do. So far i have removed all wiring to the input selector switches, mono switch, dubbing switch and the ext. David hafler used to be right across the bridge in pensauken nj and my brother spent a lot of time together. Differencefrequency distortion is extremely low at 104 db, while a typical amp is at 90 db. A classic 1980s designer preamplifier to enjoy and treasure. Vacuum tube modification for hafler dh101 preamplifier. Buy a used hafler dh101 and just use the phono stage.
Monitor selector, monostereo, filter, external processor loop. View and download hafler dh101 assembly and operation instructions manual online. Vintage hafler dh160 stereo graphic equalizer ashfield. I had the hafler dh101 preamp for a very short time and it sounded way too harsh. It is amazing how just cleaning up the input wiring made quite a large difference in sound. Since then the preamp has been well received in the marketplace and is generally considered the best sound value for the dollar spent. The david hafler dh101 i bought this as pre power set and am going to keep my current preamp for a number of reasons over the hafler. This upgrade kit was designed by an audiophile for an audiophile and can be easily installed by those with no. Full text of radio electronics october 1980 see other formats. This amp uses a single ground wire to the speaker common, then to the board output. When david hafler sold his hafler and acoustat companies to incar audio manufacturer rockfordfosgate a year or so back, things went quiet for a while as the new owners made arrangements to transfer production of both brands to their arizona facility and took stock of where their new acquisitions stood in the marketplace. Mostly i prefer the remote control function and have a separate phono to do vinyl duties.
Scribd is the worlds largest social reading and publishing site. My system sounds as good or better than those that are 5 to 10 times the cost. Its 115 watt per channel power rating is sufficient. I prefered my hafler 945 and sound valves 101i over the dh100 but it was in original condition and slightly beat up. Lx modification techniques include changes in the feedback loop, existing rfi input filter, bias circuitry, power supply, bypassing, compensation caps, etc. Hafler dh101 preamp techtalk speaker building, audio. Next step would be too put a signal into the nonworking channel and trace it through with an oscope to see whats not working correctly.
Similar in concept to our well respected hafler dh101 mod, here we have many mods to line stage, coupling caps, feedback circuit and internal regulated power supply. Hafler dh101 humm youtube its humming along nicely i know it wants to try to sing, and it can, but also hums too. You can do easy tweaks, not so easy tweaks, and highlyexperiencedtech tweaks. This upgrade kit will change that by providing a level of performance that is equal to many of the finest preamplifiers ever produced for a fraction of the cost. This particular unit is not stock and was modded by one of the mod squad who are famous amongst the collectordiy forums.