ASR AudioBasis ExclusiveusedASR Basis Exclusive 2X MKII, Battery Powered Phono Preamp, Absolutely Stunning**Please click here to check out our newly launched SkyFi Audio website with additional items for sale** Fully tested in our lab and in perfect working condition. Has a few light scuffs on the sof...7499.00

ASR Basis Exclusive 2X MKII, Battery Powered Phono Preamp, Absolutely Stunning [Expired]

no longer for sale

**Please click here to check out our newly launched SkyFi Audio website with additional items for sale** 

Fully tested in our lab and in perfect working condition. Has a few light scuffs on the soft acrylic top. The Faceplate is clean and intact. 

Original boxes and manual are included with your purchase, along with the special umbilical power cord as shown in our photos.

Between $11,000 to $13,000 MSRP depending on options.

Great review from the expert Mr. Michael Fremer (via Sterophile c.2003):

"Everybody's gotta get into the act!" Jimmy Durante used to say. That's what's happening with phono preamplifiers—they just keep being built, and I keep getting them for review. Up for evaluation in next month's column are new models from Perreaux, Musical Fidelity, Graham Slee, and a Chinese one, Ming Da. You can bet there'll be more.

This month, I concentrate on one: from German designer Friedrich Schäfer, the unique and exceptionally fine-sounding ASR Basis Exclusive, built in Germany and imported by Fanfare International. This two-piece, battery-operated design is connected to the power supply via a large-diameter umbilical cord hardwired to the main section and terminated in a massive multi-pin connector. The battery supply—larger and heavier than the amplification and equalization section—is housed in a metal chassis with a thick acrylic front panel. The main unit consists of a single, unusually large double-sided circuit board in a plain-looking acrylic chassis that will win no points for industrial design—unless you like acrylic.

Unusually, the Exclusive is actually two complete, fully balanced stereo phono preamplifiers on a single chassis, entirely independent except for a shared, switchable output. You can have two turntables connected simultaneously, or have two tonearms on a single 'table (as I do), and easily switch between them. The fully balanced input stages feature both single-ended RCA and balanced XLR inputs, as does the shared output.

Each preamplifier is independently configurable via a series of DIP switches that control gain, capacitance, and resistance. An additional DIP switch acts as a "rumble filter" to allow you to limit low-frequency response to 2Hz or 20Hz. 10 more DIP switches allow loading to be adjusted from 5 ohms to 1k ohm for moving-coil (MC) cartridges; and, for moving-magnet (MM) types, 50k ohms in balanced mode and 36k ohms in unbalanced. There are switch positions for values of 5, 7, 10, 15, 22, 47, 64, 100, 220, 360, 470, 1k, and 50k ohms; other values are possible by choosing different combinations of switch positions.

Solid-state phono preamplifier with external battery power supply, balanced (XLR) and unbalanced (RCA) inputs, unbalanced, (RCA) and balanced (XLR) outputs

Frequency Response: 
3Hz–200kHz, –3dB

RIAA Accuracy: 
<0.5dB, 20Hz–20kHz

Weighted S/N Ratio: 
>68dB, depending on gain (MC)

<0.01% 5mV–5V into 100 ohms at 1kHz
<0,05%, 20Hz–20kHz

Input Impedance: 
5–1000 ohms (MC)

Input Capacitance: 
Adjustable between 100pF and 320pF

Universally adjustable with DIP switches from 32dB to 64dB

Main Unit: 17" (430mm) W by 14.6" (370mm) D by 4.7" (120mm) H
Power Unit: 18.1" (460mm) W by 13" D (330mm) by 6.3" (160mm) H

Main Unit: 22 lbs (10kg)
Battery Power Unit: 57 lbs (26kg)

The SkyFi Testing Process for Preamplifiers:

We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. Special attention is paid to the power supply which is the most common source of failure for preamps. We then power up the unit and run a simple 1k sine wave while monitoring the low voltage output on an oscilloscope for signs of distortion or noise to get a baseline. 

At this point we will lubricate and clean all switches and potentiometers (that are not sealed) with a high quality contact cleaner, and then re-test all functions for any signs of noise or scratching. 

Final testing involves putting actual music through the preamplifier. We have learned over time that some issues are only noticeable to a trained ear while listening to a familiar source material. Our test bench has reference vintage KEF speakers that we are super familiar with which will quickly reveal any discrepancies. Some preamps will then move into the listening room where they will be tested with our in-house reference system.


Thanks for looking and please click here if you’d like to receive a list of new equipment we receive weekly. We promise not to bombard you with junk email.



This item will be professionally packaged and insured for safe transit to your home unless you opt for local pickup from our shop. Please note that all local pickup items are only wrapped with industrial strength clear cling stretch wrap if the original manufacturer packaging is unavailable.

Local pickup is available in Glen Rock, NJ, just a half hour drive from Midtown Manhattan, with convenient parking near our building.

And if you’re looking to ship to Canada, simply follow this link to view and purchase this item. We ship to Canada via UPS Worldwide Expedited service and you’re responsible for any applicable import duties and taxes.

If we don’t have the original manufacture’s packaging, we use heavy duty double-ply corrugated boxes with custom made to your item Instapak expanding foam custom inserts. In many cases this has proven to be better than the original packaging! We also use high quality fiber reinforced tape to seal our packages. Lightweight items will be bubble wrapped and shipped in a high-quality box. 

Click here for specifics on our specialized packing process that separates us from the rest.

NJ Residents or anyone picking up without a resale certificate will need to pay NJ Sales Tax.

Thanks for looking and be sure to call us at 201-879-0000 with any questions. 



SkyFi Audio is a small startup business specializing in the purchase, reconditioning, and reselling of select high-end audio equipment. We only buy equipment the we admire and are passionate about. No mid-fi, no gimmicks, no junk.

Each piece of equipment is cosmetically restored and fully tested in our well-equipped lab by an engineer with 30+ years of experience in the HiFi world. If it does not meet or exceed the original manufactures specifications, it will not be sold. We are very selective about the equipment we purchase, focusing on mostly analog, high-build quality, American, and European built units.

Through our sister company which is an authorized dealer for McIntosh, Audio Research, Sonus Faber, ClearAudio, Pro-Ject Audio Systems, and Sony ES, we have access to OEM parts, service, and support. If you’re local and looking for new equipment from the above-mentioned manufacturers, please drop us a line as we can arrange both sales and professional installation in the tri-state area.


We do not accept or review any offers that do not go through the official Audiogon system. We have too many items for sale and it’s nearly impossible to keep track of offers outside of the official system. Please don’t message, email, or text any offers. 


We prefer working through PayPal which allows you to use a credit card, bank transfer, and their special financing to spread out payments over six months. We do not charge extra for any PayPal fees if you purchase the item at the asking price. You can also send us a personal check (which will need to clear before shipping), certified check, money order, or bank wire transfer. International clients without access to PayPal should use a bank wire transfer. 

If you’re picking up an item, we do not accept PayPal. You must pay in person with a certified check, bank check, or wire transfer. If you make a PayPal payment and are picking up the item, your PayPal payment will be returned. 


We accept trade-ins of equal or lesser value under certain conditions. Simply click here to submit your gear for full consideration. We will only consider high-end equipment from mainstream manufacturers such as McIntosh, Mark Levinson, Audio Research, Krell, etc. and will typically pass on displays, projectors, receivers, dated surround processors, and mid-fi equipment of any type. We will offer a fair value for your equipment, but keep in mind we’re running a business and will need to be able to resell the equipment at a profit after investing a great deal of time and resources in testing, certifying, repairing, cleaning, and packaging the incoming equipment. If you’re looking for top dollar, we suggest selling direct on your own.

SELL US YOUR GEAR (Working or Broken):

We’ll also purchase your used or broken gear and arrange pickup if you’re in our local market. Simply click here to submit your gear for full consideration.

SCHEDULING AN APPOINTMENT:                                                                                

We are currently operating from our shop inside our dedicated building in Glen Rock, NJ. You’re welcome to make an appointment if there’s a piece of equipment you’d like to see in operation before or after purchase. We have several well-equipped and dedicated listening areas, plus a dedicated listening studio with tons of equipment of all makes and models. We’re not a store, so please don’t make an appointment if you’re just curious as to how a speaker or piece of equipment sounds. In essence - no tire kickers please.

You can call or text 201-879-0000 with any questions or to schedule an appointment. We can also arrange to install, calibrate, and tune your newly purchased gear in your listening room if you’re local to our area. This is super useful when purchasing large speakers or heavy amplifiers. It’s also great for ensuring your new turntable is setup correctly in its final resting place.


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