Van Alstine recently told me that the DVA name used in this amp and others in his line of solid state amps is in memory of his late wife, Darlene Van Alstine, who passed away 20 years ago. Bass proves another strong suit. Tubes is tubes is tubes. Tags: dynaco; j49; k134; mosfet; van alstine; kve777 AK Subscriber Subscriber. Some clients have sent their equipment in to Audio by Van Alstine for circuit upgrades many times over the last 40 years, and each time they get current state of the art performance at a fraction of the cost of buying entirely new equipment. No flashy meters. Ideal amp to drive with Dyna PAS series tube preamps. I've read that the mosfet outputs for the DH500 are now unobtainum. Van Alstine did very high quality modifications on Dynaco and other manufacturers, which were substantial, and brought the sound quality of the modded audio equipment to a much higher level and was well worth the investment. Close. Man I loved this amplifier!! Other Notes: Frank Van Alstine modified Dynaco ST 150. Audio by Van Alstine FET Valve CF Vacuum Tube Preamplifier Review Highlights. For the $100 I spent on it..pound for pound it was one of the best sounding amplifiers I've ever owned bar none. The two I am thinking of both have Class D output stages rather than a MOSFET Output stage. This GFA-5500 is a 2-channel MOSFET-based amp. Introduced: 1982. No graphs. The presentation … It got a glowing review from Steven Stone … And there ain't nothing that even comes close. Audio By Van Alstine (AVA) Synergy 450 Power Amplifier Blockbuster performance for only $1999! this amp was high on my list before i bought my carver professional ZR1000 digital amp.... the only "negative" might be the fact that are not very pretty.... frank does not put much money into cosmetics..... additionally, … Re: Audio by VanAlstine . Serial Number: 38530886. Our new SET amplifiers are uniquely DC stable. Just the machine. Its most important quality is the pure musical pleasure it gives; it makes you forget audiophile crap and simply enjoy the music in a new and exciting way. Good overall aesthetic condition. Close. Review By Anthony Nicosia Frank Van Alstine, the owner and founder of AVA (Audio by Van Alstine), has been building quality audio gear for over forty-three years. Bandwidth is flat from 3Hz to 70KHz. I wouldn't describe this amp as "hard". Fet Valve Power Amplifier Upgrade. This is our newest design with a simple but amazingly effective bipolar transistor front end followed by a very fast and rugged power mosfet current amplifier section. Product: Dynaco Van Alstine Mos-Fet 150 Stereo Power Amplifier; Modified; Vintage; ST 150 Product SKU: 23447 Serial Number: 38530886 Voltage: 120V Cosmetic Description: 7/10 Very good cosmetic condition with some minor visible cosmetic wear including a few small nicks in the front face and some chipping in the wood exterior. 17" wide, 13" deep, 7" high. I am the second owner of this... $600.00. Last edited: Mar 28, 2013. Average Private Party Trade-In $.$$ $.$$ $.$$ More from Audio by Van Alstine in Solid states: Omega II 400; OmegaStar 240; Omega III 200; Omega III 440; Delta 80; Double … Retail Price: $500.00. Not just a great value , the Ultra Sl is suprior in almost every aspect. The FET Valve CF Vacuum Tube Preamp is a highly flexible little component. This amplifier is in excellent operating condition and provides clean high quality sound as designed. View cart and check out. And … This review is for a Van Alstine Ultra SL Hybrid preamp with mosfet upgrade . This item shows some wear consistent with … All new AVA-designed black chassis with black-anodized faceplate and high-efficiency, black-anodized, extruded, rear-mounted heat sinks with 12 TO-3 case power MOSFET output devices. Seller Notes. This discussion; Message User; 1,977 posts. A rebuilt DH500 become an AVA "Insight+500", and XL600 becomes the "Insight+600". Oh man!! Shipping,insurance and related expenses fixed at $30.00 for CONUS sale with Paypal. My big tube amp stopped working almost two months ago, and I finally decided today to get it off the shelf and send off to get repaired (still here at the moment). The poor sounding electrolytic input capacitors have been replaced with better sounding 15 uF Mylar film capacitors. Log in to Reveal Pricing Information. I can only assume that she would have tapped her foot, too, if she could have heard the DVA SET 600s. Powers on, but no way to test further. Audio by Van Alstine Mos-Fet 120D power amplifier. Van Alstine Synergy 450 in excellent condition, a little over a year old. Heat sinks are located around back rather than on its side making for a more pleasant experience when moving the 450 as its fins did not dig into my hands. This item shows some wear consistent with … But if a recording has delicate elements to it, this amp does it more delicately than the when it's muscling the bass. One by one, the major amplifier manufacturers have acceded to the pressures of the marketplace and introduced "solid-state" models, whether or not these happened to sound as good as their previous tube-type units. Dynaco Van Alstine Mos-Fet 150 Stereo Power Amplifier; Modified; Vintage; ST 150. Condition. Theta Digital Dreadnaught 5x200W Power Amp in Factory Box. goes for $899.00. Current AVA ST120 amp with 80w/ch. Bench checked at 40 watts/ch. Completing the system were a Denon CD player, Squeezebox, Van Alstine Vision DAC/Preamplifier ($1599), Van Alstine AvaStar hybride tube preamp ($1799), Van Alstine FET Valve Ultra+ 550 hybrid tube amplifier with double-die output MOSFET option ($2399+$22), and custom made cables. When you … $1,375.00 +$75.00 shipping. Its most important quality is the pure musical pleasure it gives; it makes you forget audiophile crap and simply enjoy the music in a new and exciting way. item 9 VINTAGE DYNACO ST STEREO 70 TUBE AMPLIFIER PreAmp Frank Van Alstine built 8 - VINTAGE DYNACO ST STEREO 70 TUBE AMPLIFIER PreAmp Frank Van Alstine built. And for the record, Van Alstine's current amps (and pre amps, too) are much more refined than even the amp I have. Very impressive quality. Powerful Theta Dreadnaught amplifier 5x200W with black faceplate. 10-21-2020 10:56pm. If anyone is genuinely curious, I might snap a photo. String instruments maintain their dimension, bass notes carry with appropriate authority, and percussion features a punchy strike combined with fluid decay. Multi-Channel Amps. The base unit has six analog inputs, a tape loop, two line outs and a nice headphone amplifier. For 2 … Model APT08-120C; Optical mag. Sale Regular price $2,199.00 Faceplate. And BTW, the amp is so amazingly over-built. I was looking for is a combination of these two worlds - solid state and tube. x0.8 ±5%: 2/3"-FOV (VxH) … Van Alstine Fet Valve 350Ex Amplifiers . The unit has a push button on/off switch with a blue indicator light. NoTransistors, Mar 28, … Used. Product: Dynaco Van Alstine Mos-Fet 150 Stereo Power Amplifier; Modified; Vintage; ST 150 Product SKU: 21951 Serial Number: 38530886 Voltage: 120V Cosmetic Description: 7/10 Very good cosmetic condition with some minor visible cosmetic wear including a few small nicks in the front face and some chipping in the wood exterior. Van Alstine Mosfet 150 Modified Dynaco ST 150 Power Amp Approximately 75W / channel. Thread Status: Not open for further replies. The power supply mod I like was published by Frank Van Alstine in one of his newsletters or columns in the early 80's, August 1984 I believe. It is nice to see you here Mr. Atkinson. T-120C MEAN WELL Switching Power Supplies 117.5W 5V/10A 15V/3.5A -15V/1A datasheet, inventory, & pricing. Tobacco Exposure: No. The official title is the Audio by Van Alstine Vision SET 400 Amplifier (MSRP is $2200) and is as basic looking as can be. Van Alstine MOSFET Amp Info Wanted. Its faceplate is aluminum, about ¼ in thick, with a clear anodized aluminum finish. I caused its demise by making a stupid mistake . It is a solid state Class A/B design. You're probably thinking of the Hafler DH-500 and XL-600. Regular price $1,999 View. This limits sets the low frequency -3dB point at 0.4 HZ which is more than adequate. DESCRIPTION 160 watts per channel 20 to 20 kHz into 8 ohms at less than 0.01% THD. Dynaco was one of the last of the hold outs, preferring, according to their advertisements, to wait until they could produce a solid-state unit that was at … I would buy another in a heart beat, if I could find one just like it in good … The pairing was less than fortuitous, at least for CD. Cosmetic Description: 7/10 Very good cosmetic condition with some minor … Item added to cart. Following that train of thought the front faceplate of the Synergy 450 has only a power down on/off switch and a logo indicating it is a Van Alstine product. Alta Audio was showing off their Celesta FRM-2 stand-mounted speakers ($15,000/pair) at AXPONA, driving these two-ways with AVA SET monoblock amplifiers ($5000/pair), which use two of Frank Van Alstine's single-ended MOSFET amplifiers in push-pull to obtain 600Wpc into 8 ohms. Product SKU: 23447. And … Log in or register to post comments; September 8, 2005 - 7:43pm #3. haroon. Age: Unknown. Top. Bass … Van Alstine’s years of designing tube gear presents us with a solid-state amplifier with similar voicing. Audio by Van Alstine does complete DH500 and XL600 rebuilds with new modern MOSFETs. Quantity. This is from a working high end home theater and is fully functional. 30 Amp binding terminals have … The AVA’s high power reserve gets a grip on speaker drivers and refuses to let go. This is solid built beast with outstanding deep bass and … Service History: None. About Audio by Van Alstine; The AVA Advantage; Contact; Account. I don't know if that is also true for the XL600. Location: Rural Kansas. Shipping weight 33 pounds. It's not the most refined amp in the world, … Line voltage. About this item. My own wife’s wishes will be honoured; in our home the DVA SET 600s will … John Atkinson Editor, Stereophile. I wish I still owned one. If that has changed, then I will consider contacting Frank Van Alstine about arranging a review. I picked up this "Dynaco Mystery Amp" from a fellow AK'er recently and found the boards are VanAlsine PC-489, and the outputs … The source was Frank's laptop feeding data via a 25' USB cable … Sort by. 1 … I owned one of these 60/wpc power amps for several years, always thought it sounded wonderful. Discussion in 'Audio by Van Alstine' started by kve777, Apr 23, 2016. It does have a muscle element to it in the bass and lower frequencies. another vote for van alstine frank is one of the original no BS guys in the biz... puts $ into the sound quality, not the bling factor truly well designed, truly excellent sounding gear no affiliation, just a loyal … Vision SET 400 Amplifier. Category: Amplifiers & Receivers > Solid state. 29 Days Left. 8 ohm. Voltage: 120V # of Owners: Unknown. This is a great sounding power amplifier for the price. Possible upgrades include a remote volume control, a phono stage, a buffered tape out and a theater bypass switch. I was looking for is a combination of these two worlds - solid state and tube. … APT08-120C. Add to Cart The new Vision SET 400 power amplifier is a uniquely musical high-fidelity amplifier that is designed to accurately preserve all of the energy of a live listening … While being compact in size and light in weight the VS-TC & APT series are our largest collection of telecentric lenses with WDs ranging from 40- 340mm. Joined: Sep 5 2005 - 12:01am . Notes: 50w. The preamp … The only reason for selling is I am going back to a tube amplifier. They produce a clear distortionless, high contrast image. Fet Valve and Tube Preamplifier Upgrade. Typical marks/scratches from use. Last seen: 9 years 1 month ago . View Audio by Van Alstine MOS-FET 150b listings → MOS-FET 150b. Discussion in 'Audio Hardware' started by Done A Ton, May 14, 2012. This mod does away with the troublesome regulator driver circuit comprised of the dynaco matched set of 2N4037, 5320 and either a 3055 or 4347 output, and replaces them with a single mosfet, either a 2SK133, 134 or … That’s it. I had a Van Alstine Mosfet 120C Dynaco ST 120. Quantity. I couldn't believe how good it sounded. Done A Ton Birdbrain Thread Starter. Van Alstine really knows his stuff, as he has proven in this early example of his work; so only highest praises to him. Purchased new from Van Alstine and had to wait a bit but worth it. Not just a great value , the Ultra Sl is suprior in almost every aspect. Messages: 457 Location: South Jersey, near Philly. This review is for a Van Alstine Ultra SL Hybrid preamp with mosfet upgrade . All AVA products are designed in-house and "hand-built in the USA" at the factory in Woodbury Minnesota. Added double die option with extra mos-fets and used in 2 channel stereo for small to medium sized room with Marantz 8003 CD player, Kimber wires and various speakers (Salk Ellis 1801 floor stander, Paradigm Studio 10, Infinity Classia and Polk Rti book shelf. 1/2″ – 2/3″ sensor support; 70 models available; Compact; Light weight; Telecentric design . The Van Alstine MOS-FET 120 is a complete rebuild of a … Van Alstine C Series Dyna ST120 s MOSFET amp in excellent condition. On the rear panel are a pair of RCA inputs, an IEC connector, fuse … Offline .