The Audio Research EC-21 is a vintage two-way vacuum tube electronic crossover that lets you bi-amp your speakers like it's 1980 all over again. This isn't just a piece of gear; it's a ticket to audio nirvana for those who crave that warm, tube-driven sound.
- Production
- 1980-1985
- Condition
- 9/10
- Serial No.
- 05112002
- Orig. MSRP
- $795
- Restoration
- Cleaned all control contacts
- Replaced all electrolytic caps
- Tubes tested strong
- Verified inputs/outputs/pots
- Set to 700Hz crossover with 18dB slope
- The History of Audio Research
- Audio Research Corporation, affectionately known to fans as ARC, was founded by William Z. Johnson, who began designing custom audio electronics in the early 1950’s and who also operated a specialty audio retail store until the mid-1960’s. Johnson’s efforts almost single-handedly revived vacuum-tube designs at a time...
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- Liner Notes
- The EC-21 is an infinitely variable, fixed frequency and slope, two-way electronic crossover, allowing biamplification of a number of quality loudspeaker systems. Biamplification greatly improves the dynamic range of an audio system while greatly reducing dynamic distortion. When considering additional power for your audio system discuss the benefits to biamplification with your Audio Research dealer. Biamplification is the best approach to increasing system performance and efficiency.
- Packing
- Prepare to be impressed. We have arguably the best packing process around. We use our InstaPak machine and white open cell foam to build a custom enclosure for your piece that ensures that it's stable and secure. If it is particularly fragile or heavy, we typically opt for private courier delivery. Depending on where you are in the country, that may cost a bit extra. We also take great care to protect the tubes. When sensible, we will pack the tubes to prevent any movement. Other times, we'll individually wrap the tubes and mark their corresponding socket to preserve the bias. You can be confident that your piece will be snug as a bug in a rug.
- Shipping
- This piece ships to the contiguous United States for a flat rate of $75, which includes our packaging and our insurance. Of course, we'll ship anywhere in the world, just drop us a line and we'll give you an estimate – even if you're just curious.
- Stock No.
- 8928859062493
The Audio Research EC-21 is a vintage two-way vacuum tube electronic crossover that lets you bi-amp your speakers like it's 1980 all over again. This isn't just a piece of gear; it's a ticket to audio nirvana for those who crave that warm, tube-driven sound.
