I didn't get any replies, so I picked one (the Hafler) and though I'd share my findings and a brief review. DH-500 Amplifier pdf manual download. Now days you can pick one up used in the $200-$300 price range. Hafler DH-220 as basis for guitar amp? kicking around in my dangerously overloaded workshop, a cosmetically-beat but electronically fine Hafler DH-200 power amp Hafler DH-200 pricing information. The Hafler DH-330 is approximately 17 inches wide, 9-1/2 inches deep, and 3 inches high, and it weighs 8-1/4 pounds. 7 out of 5 - 29 reviews - audioreview. Hafler TRM 10. $32. DH-200 Amplifier pdf manual download. <<<Scroll down for closeout PA-5 V2 deals, Hafler DH-120/240, Hafler SE, 9000 series amps>>> The planning and hopes for any mod result will depend to some degree on the underlying health of the original amp. They went to all metal film resistors, and have most of the critical caps upgraded already. 6 bids. com. As I recall there is a feed back resistor, R39, near the dead center of the PC board. In refining the basic Hafler MOSFET circuit the overall open loop gain was reduced by using more local feedback in the input stage. I'm glad to find you here. The Hafler DH-500 power amplifier is a "big brother" to the company's widely acclaimed DH-200, embodying many of the same design concepts with a thorough reengineering to deliver high-power performance with high reliability. If you can get a DH-220 I would select it over the DH-200. When the CD digital format appeared in 1983 listeners were astounded at the new amount of detail in recordings. location TB1 and TB2) for a Hafler DH-500 the part number is SF-024 in the earlier manual, or 332002 in the later manual. Thanks Peter Ill be measuring at least a dozen times! Imagine bringing a new TV home and finding out that it doesnt fit!!! Im sure itll be a pain to install but hopefully it wont be removed (much) I loved the sound and was floored by its out of this world performance! What really amazed me is that I built it myself - less than pristine solder work - yet, it sounded wonderful! If it was still in production, and I needed to replace my amp - no doubt - for my money - I'd purchase another Hafler DH-500. Find great deals on eBay for hafler 500 and hafler dh 500. I love Hafler amps though. $17. It is that cutting-edge image of the Hafler line which has seemed lacking in recent years. (With the fuse removed, of course. Will coverage of the 9500 confuse or please those readers who want us to review affordable products? Is the top-of-the-line Hafler "affordable"? Hafler amplifiers were made in Tempe, Arizona, USA. This is 115 wpc Stereo amp. He almost succeeded—the DH-200 proved an excellent platform for almost unlimited tweaking (called "Poogeing" by cognoscenti). Hafler dh200 mono amps I've got three dh200's, one two channel which I built in the early 80's and still powers my 15" jbl 2235 subs, the other two I set up in mono to power a pair of DQ-10's, they worked very well but, they've been in boxes (Haflers) for probably 15 years. $200 per side you can have a pair of DH-200 stereo amplifiers and still have the option of either bi-amping your speakers or bridging the Hafler amps with an optional circuit you can still build from plans you can find online. 00 +$4. Page 20 INSTRUCTIONS FOR THE HAFLER DH-222 DH-222 AMPLIFIER BRIDGING KIT FOR THE DH-220 The DH-222 may be installed in a Page 21 DH-222 INSTALLATION INSTRUCTIONS 10 Disconnect AC power from the amplifier, and remove all con- the way onto the switch I keep trying to acquire a DH-110 at a reasonable price but keep striking out. They get the job done, but some of them look pretty bad now. The entire unit is finished in charcoal gray. It looks like it's wired the same also, the only difference I see is the input jacks are like those you'd find to plug full size headset type plug into, not phono jacks, so the also don't have the 2. Demo of B&K Reference 50 and Hafler DH-200 CJ Banks. I've had both upgraded by a friend--using the recommendations I could find on the web and some ideas he had. html>over here</a>. Any use of the schematics presented herein is your sole responsibility and is done so under the understanding that you are taking the full and entire risk for their accuracy and that Film cap orientation - I have only one Axon cap left in my parts drawers (only a wee 1. The company produced many near-legendary preamps, among them the DH-101 and DH-110, and a line of MOSFET power amps, including the DH-200, DH-220, DH-500, and XL-280. Price: $374. However, if the amplifier is intended for operation at sustained high power levels, or where power switching is very frequent, or where the control unit must switch sub- The biggest collection of Hafler manuals and schematics. I’m looking forward to doing some research on AK tonight to learn all about it. the DH-200 for 250mA across the B+ fuse holder. $6. The DH-220 circuit is a refinement of the DH-200 design, a Hafler landmark which has achieved worldwide recognition, and has elicited glowing reviews since its 1979 introduction. Hafler DH-200: User Guide. (08-11-18) In 1972, he founded the David Hafler Co. This one is modified with our PA-4 front-end boards with some added PA-6 touches and PS-200(4-15,000uF caps) power supply mod kit. Buy for $999. Hafler TRM6. But if we did, it would have to refer to Hafler's new Transnova 9500 amplifier (or the smaller, 9300 THX that Sam Tellig is currently auditioning). com David Hafler founded Dynaco along with Ed Laurent, and in 1972 began his eponymous company. Less than 0. Of all the things I did to improve the sound of my old DH 200, I don't think anything I did made as big a difference. Re-capped it, added inrush limiter, bigger output caps (18,000uF), gold jacks, then decided to sell that one and start on another DH-200. I just got this preamp and hooked it up to my rebuilt and modified Dynaco ST-70 (also designed by David Hafler). The original Hafler design was good, but Ed's newly designed PC-1 Driver Boards sound SO much better than the original Hafler design that you won't believe what you are hearing! Hafler DH-220, DH-200, High-End Audiophile Upgrade | eBay If they are not soldered in, VERY CAREFULLY remove each mosfet and clean the pins. We are introducing the first model revision in many years. As in the DH-110 preamplifier, particular attention has been paid to component quality, using polypropylene or film capacitors wherever feasible, for example, for Hafler DH-220 power Hafler XL600 Stereo Hafler Model 100 Hafler Model 110 Hafler Model DH-200 Hafler DH101 pre amp. Still need to tweak bias/offset before I put it in my main rig. Not bad. The PS-200/220 bare board is sourced from a USA manufacturer. 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). 95 shipping. 02% total harmonic distortion at any power level up to 100 watts continuous average power per channel into 8 ohms at any frequency bet- Right from the early years of high fidelity, David Hafler introduced the world to high performance audio with his range of Dynaco preamps, tuners and amplifiers. There are newer amplifiers, but few are better than this Hafler DH-120. Hafler vs Bryston amps NS 10 Dynaudio Hello there Im looking to upgrade my passive monitoring system with a decent amp and have been reading a lot here about these two makes. Only bought these DH-110's now was because of active speakers ,and was cheap - and good as I remember, at least the socketry is better than the 101! Fully working now. Post over on Audiokarma in the solid state forum. The Hafler 101 Preamp has undergone an even more drastic change. I'd go over every fucking driver pcb resistor and replace the two electrolytics on the driver boards. But the hafler. A Hafler stereo power amplifier, model DH-200; and a Hafler preamplifier, model DH-101 and serial number 1017835. The air, detail and weight it presents in a good recording is really special. HAFLER DH-500 DH-200 DH-220 DH-120 REPLACEMENT THERMAL BREAKER SET NC 70C SF024 11 results for hafler dh-110 Save hafler dh-110 to get e-mail alerts and updates on your eBay Feed. It is available either as a kit, or fully assembled. As in the DH-110 preamplifier, particular attention has been paid to component quality, using polypropylene or film The DH-200 was designed by Erno Borbely, a highly respected amp designer. This is about trimmer pots on the PC-19 boards. Available as a kit, it was and continues to be popular due to it's upgradability and quality. The power supply is decent in size as are the capacitors. For approx. When David Hafler sold his Hafler and Acoustat companies to in-car audio manufacturer Rockford-Fosgate 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. The original is made by Elmwood Sensor, a division of Honeywell and is a 2450 series (the number is molded into the plastic on the top of the sensor). Timeline. Please try again later. Ars Tribunus Militum I dont really require lots of power, but what I do look for is lots of control over the subs and hopefully this hafler can do that. TP-500 TOROIDAL POWER TRANSFORMERS. A very complete Line stage/Power Supply mod or a full modification including your phono stage is now available for your Hafler DH-100, DH-101 or DH-110. com I have both a Hafler DH-110 preamp and an Adcom 555, and I definitely prefer Might pull the trigger on Hafler Amps. much thanks to Herm and Ed F for their much needed guidance and support ! I may have remembered wrong - I can't find the thread about the DH-500 output mosfets. However, the Hafler is a rock-solid and reliable amp with great sound (there are a host of mods you can do to them). 95 in kit form; $449. At the time they were a very good option. 5 ohm, 0. 50. These have probably oxidized over the years and will benefit greatly. match it to the highest possible quality pre-amp you can afford (I use an Audio Research SP9) and just enjoy . It is a 0. I own and still constantly use 3 of your classics. The DH-110 power switch has been tested to provide adequate capacity for any Hafler power amplifier and typical related equipment. 5W resistor, and it tends to open. . IXYS 600V Having the QUA-CO Audio Hafler Polypropylene Capacitor Upgrade Kit installed in your legacy amp will give you the latest capacitor technology. SPECIFICATIONS Power Rating: Less than 0. 3 product ratings 3 product ratings - VINTAGE UNBUILT HAFLER DH-200 KIT STEREO MOSFET POWER AMPLIFIER AMP - NOS WOW ! $102. I know this is an old question about an old preamp - but I could use some help. A few days ago I asked for opinions on the Hafler DH-110 preamp vs the NAD 1020. I highly recomend Hafler Amps to any audio enthusiast. For the money it is still one the finest sounding amps availible. The DH-220 came along after all the many mods for the DH-200 were published. hafler dh-500 dh-200 dh-220 dh-120 xl-280 power switch plus! $9. i just brought the hafler dh 500 power amp and hafler 110 pre amp, the sound is mind blowing,very smooth and very detailed music the bass is very tight,it has tremendous power,rated at 255 watts per channel,even on quarter volume it is very loud and clear,over all a fantastic amp which i paid around 350 dollars in mumbai,India,worth every penny i spend,it is as good as the nakamichi amp II i DH-120 DH-200 DH-220 DH-500 GX 2300 GX 2600 GX 2800 P1000 P1500 P225 P230 P3000 P3100 P4000 P500 P505 P7000 Pro1200 Pro2400 Pro6000 SE120 SE240 Series 9130 Series 9180 Series 9270 Series 9303 Series 9505 SR2300 SR2600 SR2800 TA1100 TA1600 XL-280 XL-600 View and Download Hafler DH-500 instructions for assembly and operation manual online. So I replaced it with a pair of Musical Concepts PS-200 boards and eight Cornell Dubilier 12,000uf 100V caps (96,000uf). Cringe inducing socketry. This is one of Hafler's classic designs, a 100 watt/channel MOS-FET power amp. 99. f or Hafler preamps are celebrating two years of making those preamps strut some rather unbelievable sound. So as you see if you sent us your Hafler DH-200 for these mods you would pay $1147. Apparently the DH-120 uses a Mosfet configuration, so it shouldn't get unbearably hot running at higher levels of output. Hafler je t'aime!! Premiere essaie pour la David Hafler DH-200 (Mosfet) 100 watts canal comme pré-ampli la Noresco 2570 ce Our LX MKII mods…. A phenomenally revealing, pre-amplifier, requiring input from only the cleanest audio sources and ideal for driving its matching DH-200 power amplifier, which I have also reviewed on this site. Like the Hafler DH-200 only plays low. View and Download Hafler DH-200 instructions for assembly and operation manual online. I'll keep an eye for some of these on e-bay. If it's an input series coupling situation (as appears to be the case above) then connect outer foil end to source. HAFLER DH-500 AMPLIFIER. I used a kit-built Hafler DH-220 for years, then sold it, then had seller's remorse a few years later and bought a 200. 1. With this high-powered kit, David Hafler attempted to do for solid-state amplifiers what he'd already done for tubed designs with the Dynaco Stereo 70. We'll hook it up for you before you buy it. Its 115 watt per channel power rating is sufficient for driving all loudspeakers in home applications, and its design assures extremely low distortion of all types. Googling turned out to be at that it's the thermal sensors need replacement. For Hafler DH-500, XL-600, or custom project: TP-500 is a pair of 500 Watt toroid power transformers. I've done some very radical mods to those amps including modding the output modules and creating two separate mono amps on separate chassis from a single stereo amp. This might take care of the temperature difference, but not the level. The Hafler range currently includes headphone amplifiers, phono stages, step-up transformers and soon, we intend to add power amplifiers following the same dedication to quality that David Hafler engrained in this prestigious brand. Its recent version uses the P-19C circuit cards that feed 6 MOSFETs per channel, and has rail voltages of ±90 VDC. Laboratory Measurements Hawthorne Stereo of Seattle Washington offers quality new and used hi-fi systems and accessories. Loading Unsubscribe from Jaime Estevez? Hafler xl280 review - Duration: 12:46. Sa distorsionnais pas ici c'est le téléphone qui fourni pas lol Mr. We have installed PS-220 boards into other FOR SALE - Greensboro, NC - HAFLER DH-200 POWER AMPLIFIER - 100W PER CHANNEL. I have since bought another just in case any of the output Mosfets go as the original Hitachi ones are getting very rare. In 1977, Hafler founded the David Hafler company in Pennsauken, New Jersey (Philadelphia suburb). Great home stereo amplifier. Hafler DH-200 Assembly and Operation Instructions *Original* #2. 07. 00 shipping. Repairing my DH-500 was a major pain but it eventually came around. The DH-120 is considered to be a PA amplifier. Even the new price of the Hafler is a late price as it was introduced for 300 Kit and 400 assembled. I had the blinking power light happen to me on my Hafler DH 500 today. to my Bookselve speakers you can bet I'll Be adding a second Hafler DH220 To drive that. Make Offer - Hafler DH-200 Assembly and Operation Instructions *Original* #2. This feature is not available right now. Polypropylene's are sonically superior to the capacitors made 30+ years ago. If I ever add a sub. The Chinese Haflers are the TA1100 and the TA1600. Well, okay, we've never received the last type of letter. The -200 and -220 were pretty much vintage 80s amps. We offer a broad selection of products from Naim Audio, Rega, Luxman, PrimaLuna, ATC, Spendor, ProAc, Harbeth, Pro-Ject, Music Hall, Parasound, Cambridge Audio, Marantz, Kanto, Ortofon, Grado, Chord Company, KEF and more. David Hafler DH-110 Preamplifier from 1985. Once both channels were running happily with their new parts on the benchtop power supply I turned my limited attention to the chassis. 99 shipping. This is a heavy amp and it is very well built. Upgrade yours now - new information HERE. It was worth it then. Shop with confidence. I've never had a problem with any of them and they consistently outperform anything else that I've ever heard. POWER AMPLIFIER. Later versions of the DH-500, for example, used a thermistor. They sold them manufactured or as kits to save the DIYer some cash. All available for free download. com website is still up today. S. Consider these helpful improvements. I was satisfied with my Hafler until I got an original Son of Ampzilla. I have a little familiarity with the Hafler 200 and 220. I own a DH-500 and likely won't ever part with it. Re: Rebuilding a Hafler DH200 Sorry for my photos. Description. The original transformer was rated at about 680 Watts to be generous, so this upgrade to 1000 Watts is significant. I have used one in my DH-220 with extra capacitance and heard no difference and have modified two other DH-220s for friends who also heard no difference with the thermistor in place. Hafler Amplifier User's Guide DH-500. i seem to have followed the schematic propperly for the switch, but nothing. If you’ve always wanted to confuse your Hafler DH-101/110 for a tube preamp this can help. DH-200, PA-4 and more. Hafler DH 200 and DH500 but they are online somewhere, or in an AudioKarma thread. I currently have a rebuilt Hafler DH-220 and it sounds great. My son just came back from "dumpster diving" and came up with an early model Hafler DH-101 preamp - serial # 1108025. 1950, David Hafler and Herb Keroes started a Philadelphia-based company called Acrosound in order to build and sell audio-quality output transformers, primarily for home electronics hobbyists. For Hafler DH-200/220, XL-280 or custom project: TP-202 - similar to picture at left*, is a potent toroid power transformer with many important features for an audiophile-grade amplifier. Newer Hafler amplifiers, and the home audio market in general, has been neglected for lack of interest ever since the VCR became affordable to everyone in the late 1980s. 02% THD at any power level up to 100 watts per channel, both channels driven continuously, from 20-20,000 Hz. As I have indicated earlier, I present here mainly my mods that revealed an improvement (at least to my hears and some other peoples too). Typical of all early David Hafler amplifiers (pre and power) this was mainly sold in kit form, so open the I bought a DH 101 pre and 200 amp when they were brand new. Thanks to everybody. Picked up a Hafler DH-200 at an amateur radio swap meet today. The Hafler DH-200s are rock solid performers with good, clean, reliable sound Just a small bias problem. 12:46. I had a DH 500 and a pair of XL280s and they sounded good as well. Hafler. it Hafler (division of Radial engineering Ltd. Get that thing out of the closet - let it make you smile. David Hafler DH-200 Stereo Power Amplifier ☆☆☆ - $295 (Winter Haven) David Hafler DH-200 Stereo Power Amplifier☆ Near Mint ☆ Clean ☆Beautiful power amp, fully tested and in near mint condition. You should heed the maximum power rating printed on the back panel of the unit. Plug it in and forget about it . INPUTS-Magnetic Phono There are two pairs of phono inputs, identified as Phono 1 and Phono 2. Hafler POWER AMPLIFIER INSTRUCTIONS for OPERATION and KIT ASSEMBLY DH-200. I thought I would start a thread on peoples experiences and tweeks for the Hafler DH-101. MOSFETs are solid-state devices that work on principals more similar to vacuum tubes than bipolar transistors — and it sounds great! I'm in the process of repairing/rebuilding a Hafler DH-500. 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. Hafler DH-200 amplifier 15 posts Tino. pro 5000. Paired with my DH-110 Preamp it's an great combination. At the same time I knew that I could by an upgrade kit from another eBay seller. Great condition fully functioning. It is a neat, relatively small black box containing two 100W into 8 ohm rated stereo channels - no frills or embellishments, just the basic necessities. Now Hafler's second major product is upon us: the DH-200 stereo power amp. FIVE STARS + Very recently I notice a Hafler DH-100 preamp for sale here in Canada on eBay; since I had no back up preamp, I decided to bid for it. Some people tweak DH220's to run The Hafler DH-200 is a 100 watts-per-channel MOSFET class AB stereo power amplifier. Had VERY good results. A STATE OF THE ART POWE AMPLIFIER ART AN AFFORDABLE PRICE • 15% More Powe Thar n DH-200 : Polypropylen capacitore isn signal path 9 New Hi-Tech Styling The DH-220 follows in the path of the widely acclaimed DH-200 amplifier which has had highly laudatory re­ views and widespread consumer acceptance. My DH 220 has the original Hafler chassis, transformer, heat sinks, output mosfets and that is about it. If you're a Hafler fan you know that Hafler's legendary power amplifiers began with the DH-200 amplifier released in the late 1970s. Dual mono construction IIRC, which can't be said for the Hafler. , continuing the tradition of inexpensive kits, but also offering pre-assembled products. The 110 pre-amp and the 220 and XL 280 power amps. Have been shedding too - getting rid of all the extra little boxes. i might as well fit a new fan in there while i'm at it. The part is no longer available from Hafler. There's going to be alot of rookie questions. so i got a hafler dh-200 with a broken power switch, i replaced the switch and the amp doesnt light up. I got that advice from some post on a Hafler user group site. The DH-200 (100W/ch) power amplifier is historically significant, not only because this was the first Hafler-branded power amp, but the fact that it was designed by Erno Borbely (today of Borbely Audio, and a designer who I draw many design inspirations from), and the first commercial power amp to On the DH 200 thak off the cover and find the MOSFET outputs. ) has no way to assure that the information provided is accurate or represents the latest revision of a given product. Installed is a Musical Design PasPro 1 tube preamp, all other electronics removed. Their new XL-280 amplifier may represent the first "reworking" of Hafler products that AHC had in mind. That was 15 years ago, and I certainly wouldn't be spending good money on upgrades today. It has two output devices for each channel (class A/B). Hafler DH-200 Power Amplifier Jaime Estevez. from EBTH. IXYS is a Silicon Valley company with worldwide operations. The switches and RCAs remain and I upgraded the RCAs for phono, aux, and two outputs The power switches in Hafler preamplifiers have been chosen for their high ratings, and have been tested and deemed suitable for normal home switching of the DH-500. LXII modifications for Hafler DH-100, DH-101, DH-110. These transformers will indeed fit when stacked on top of each other. Like other Hafler products, the DH-330 is available either in kit form or factory wired and tested. Unfollow hafler dh-110 to stop getting updates on your eBay Feed. What you can do with the PS-220: Turn your Hafler DH-200, DH-220, DH-500 or XL-280/600 into a more musically satisfying product with improved imaging, crispness and dynamics. Hafler responded with the DH-220 which implemented most of the suggested changes. on Audiogon, the High-end Audio Community The Hafler DH-200 is a two channel audio power amplifier designed to the ver highesy performanct e standards. The Hafler DH-220 is a two channel audio power amplifier designed to the very highest performance standards. 95 wired. Today, Hafler continues the tradition by producing the very finest audio components that enthuse and enthrall those that have a particular bend towards spectacular audio. At the same Hafler Support site below you can look at the DH-220 manual and compare the differences. Tested and works great. The Hafler Iris has caught my eye though but am curious what other members think about it. P. David Hafler was one of the founders of Dynaco in 1954, and started the Hafler company in 1977. If I read everything correctly, 1. Thanks guys, for all the advice. You'll probably find more help there. Loading Unsubscribe from CJ Banks? Hafler 500 High End Stereo Power Amp At Working Mans Price $475 714-548-0385 - Duration: 5:05. I pulled the trigger on the DH-200 because it was very affordable and could be modded easily, especially if I decided in the future FOR SALE - Seattle, WA 2 - Hafler DH220 with the Rack Mount Face. Audio Amateur magazine (predecessor to AudioXpress) published an extensive POOGE article on improving the DH-200. 85 sold. The DH-200 was it's second product. The speed-measured as the slew rate-of the DH-500 delivers unmatched transient linearity, revealing the most delicate nuances of the music. it seems the transformer is getting power since i can feel/hear the very quiet buzz. His first two products were, first the DH-101 preamplifier then a few months later the DH-200 companion power amplifier. JD LABS C5 Headphone Amplifier, Sennheiser HD 598, Polk Audio Buckle, Polk Audio Hinge, Velodyne vPulse, Bose IE2, Sennheiser CX 200 Street II, Sennheiser MX 365 Shower & Off the beaten path Rigs Polk Audio Boom Swimmer, Polk Audio Urchin View and Download Hafler DH-200 instructions for assembly and operation manual online. Hafler DH 200 Amplifiers user reviews : 3. 5uF 250V one) & its outer foil end is at the 'A' end. hi again, So far, we had a lot of interesting ideas to modify (and improve) the DH-200/220 amp. . Its wat 100t pe r channel power rating is sufficien drivin algl t for loudspeakers in home applications, and its design provides extremely low distortion al olf types . You are basically paying less than $0 for a used Hafler DH-200. Location: Greensboro Price: $200 My first Hafler was a DH-101 kit - way back when (1980?????). DH-200 1979-1982 $430 new, 1997 orion 200 used replaced with the DH-220 Now Never believe anything about pricing in the orion, the used guide for values (use em only for gear info). Output Power. There is no PC7 board, just the regulat PC6 boards like my DH-200 has. Hafler DH-200 Amplifier. Smart Stereo Power Amp Model: TA-242 115 watts per channel Made for the theater industry by Hafler Same as the Hafler DH-200 except with Pro Audio connections The Hitachi is a great amp- I owned one at one point. Later based in Canada. 2 ohm resistor attached to them like my phono jack inputs on my DH200. ) This note was by phone conversation with Hafler. View and Download Hafler DH-200 assembly and operating instructions manual online. David Hafler, an engineer of the "old school," holds as an I have had mine since 1979 . Budget Audiophile 329 views. the preamp’s front panel. PA-6 Front-End Circuit Boards for Hafler DH-200/220/500 and XL-280/600. Take out the 2 screws and slip the MOSFET out of the socket. It will improve sound clarity and really sweeten up the sound of your DH-200. Clean all connections and slip the MOSFET back in ,put in the two screws and move on to the net output device. quality rubber feet 4 pk fits dynaco hafler marantz many others . I had mentioned that I was going to pull the pre apart and rebuild with fancy capacitors and an upgraded power supply, etc. Hafler DH-200/220 Mods 2 Attachment(s) As suggested in "hafler dh-220" thread to repair it, here is the starting point of mods that peoples have done on this amplifier. NAD 1020 pre-amp with Hafler 200 amp Yamaha CR-220 receiver Yamaha C2 pre-amp with Hafler DH-500 amp Yamaha C2a pre-amp with McIntosh MC-2155 amp Tandberg TR-2080 receiver Yamaha CR-2020 receiver NAD 7020 receiver Proton 930 receiver NAD 3155 integrated amp NAD 7225 receiver Yamaha CA-2010II integrated amp Nakamichi TA-2A receiver Audio Asylum - Amp/Preamp Asylum: REVIEW: Hafler DH-101 Preamplifier (SS) by NOSferatu - Looking for a new Amp or Preamp? If you're after tubes, post /bbs. I'd retake them but the amp has long since been returned to it's owner. The Hafler DH-200 is a 100 watts-per-channel MOSFET class AB stereo power amplifier. $3. Here is advice from a Hafler guru: The DH-500 is noted as a powerhouse with low $$ cost per watt. Three DH-200 amplifiers in a six-channel home theatre system would be something to hear