Audio Research LS17 audio amplifier
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1. 11 But listening to the mix of acoustic and electric instruments on the Soul Farm CD Scream of the Crop Desert Rock Records 26 6 with the AC 11 heard the LS17 more easily sort out the instruments in the mix www soundstage com Audio Research also put some thought into what s beneath the LS17 its squishy black footers which ideally exclude the need for aftermarket footers ARC suggests that setting the LS17 ona good solid surface will get the best out of it discovered that could hear most of what the LS17 offered when it was used just as ARC suggested au natural But when slipped Symposium Roller Block Series 2 footers and a Svelte Shelf below the LS17 improved noticeably enough that wanted to keep it all together With Mobile Fidelity s very first SACD Duke Ellington s Blues In Orbit UDCD 757 there was more weight to Ellington s piano and more of that tinkly sound Ellington mastered when the Symposium products were under the LS17 The rhythm section had more definition and heft and the orchestra more weight and power The entire presentation took on a richer more detailed and clearer picture than without the Symposium goodies If you can t afford the LS17 and all the added accoutrements fear not your money will not be misspent on only the LS17 It s just that you ll squeeze out every last iota of performance should you judiciously add some aftermarket accessories also used the LS17 both single en2. stage preamp and believe there s some truth here While I ve not heard the Reference 3 in my system with the LS17 ARC has packaged quite a bit of sonic punch into what ts a mid priced preamp Plus just try to find another tube line stage that offers truly balanced inputs and outputs along with the LS17 s sonic strengths for the same price That s not going to be an easy task While using the word bargain to describe a 4000 preamp may be a tad presumptuous within its price range the LS17 is exactly that You ll find yourself having to pay more money for less than what the LS17 offers So while the LS17 is inherently better than its less costly stable mate and more than likely not its big brother s sonic equal it is still a benchmark in its price class Its attributes are addictive and its limitations pass almost unnoticed Once you ve heard its siren s song you ll find yourself drawn unerringly to its beguiling presentation And best of all You never know what you ve got till it s gone won t apply to the LS17 it s certainly not leaving my equipment rack John Crossett johnc soundstage com Company Info LS17 Preamplifier Price 3995 USD Warranty Three years parts and labor Audio Research Corporation 3900 Annapolis Lane North Plymouth Minnesota 55447 Phone 763 577 9700 Fax 763 577 0323 Website www audioresearch com www soundstage com Loudspeakers Power Amplifier Preamplifier Di
3. Audio Research LS17 Preamplifier by John Crossett johnc soundstage com April 2007 There is an old saw that runs You never know what you ve got till it s gone The use of this expression is usually in the field of romance but it has its application in the audio arena as well There are many times when we replace a long cherished part of our system with what is supposed to be an upgrade only to rue the day we did it discovering that we didn t really appreciate what we had On the flip side of this same coin is discovering that what we had long considered excellent sound was in reality ape waste in comparison to the sense of sonic bliss we achieve with a new component We may find that aspects that are now gone things like noise frequency response aberrations and the masking of micro or macro detail had a greater effect on the sonic outcome than we thought and that new preamp CD player cartridge speaker or whatever works audio miracles So it was when began to listen to the Audio Research LS17 line stage preamp had been living in blissful happiness with the ARC SP16 for many years thoroughly enjoyed the manner in which it reproduced music in my system thought knew what had and was happily groovin on the music it reproduced But after inserting the LS17 into my system right out of the box and stone cold I was aghast at how much more musical information was coming through the speakers
4. P16 is single ended only and having the option of both balanced input and output is a far bigger deal than many of us used to only single ended connection can fathom also had the Conrad Johnson PV15 3000 during part of the review period This provided me with yet another option for comparison to the LS17 Yes the PV15 is also a less costly piece and it is also single ended only But its strengths are such that it was more competitive with the LS17 in some ways than the SP16 The PV15 is also a tube design that does not revert to sounding tubey It does a better job at the frequency extremes than the SP16 while still coming up short of the extension and weight of the LS17 There s simply more detail definition and extension and a tactile sense of realness with the LS17 The PV15 gets you part of the way there but the LS17 takes you the rest of the way home The Audio Research SP16 and the Conrad Johnson PV15 are both fine preamps especially at their prices The SP16 was a Reviewers Choice and the Exceptional Value award winner for 2002 But comparing these two fine preamps to the LS17 is truly a case of more and better more dollars spent and better sound quality as the result The LS17 was the superior music reproducer and more than simply an evolutionary step forward from the SP16 Given my experience it s an entirely new species of ARC music making machine Conclusion Audio Research calls the LS17 its Baby Ref line
5. buttons for Power Monitor Processor and Mute All functions are duplicated on the nicely sized remote control There is a larger rectangular area above with a green linear LED display to indicate the preamp s operating status input chosen volume level and the like Around back the LS17 has two sets of balanced and five sets of single ended inputs though two of the latter are for the processor loop and tape monitor There are also twin balanced and single ended outputs so using a subwoofer with the LS17 will be a walk in the proverbial park There is also a fuse holder note the fuse s orientation if you remove it ARC pays attention to such things a 12 volt trigger input and an IEC power cord receptacle The LS17 is a hybrid preamp It uses JFets in its input and gain stages and a pair of 6H30P tubes in its output stage The 6H30P or super tube as it s been unofficially dubbed is supposed to be not only sonically superior but long lasting as well which sounds like a win win situation to me The LS17 has a solid state power supply with separate electronically regulated low and high voltage supplies Voltage gain is 18dB balanced and 12dB single ended indicating that the LS17 is indeed fully balanced The LS17 does not invert polarity no futzing with speaker cables required What I heard The LS17 was like John Wayne unflappable cocksure authoritative and quietly powerful There was a tactile realness and a dist
6. d line stage only preamp It uses JFets in its input and gain stages and a pair of 6H30P tubes in its output stage The 6H30P or super tube as its been unofficially dubbed is supposed to be not only sonically superior but long lasting as well which sounds like a win win situation to me The LS17 has a solid state power supply with separate electronically regulated low and high voltage supplies Use also used the LS17 both single ended and balanced and the results were clearly in favor of the latter In considering the LS17 as a potential upgrade do not discount having the option of going balanced especially if your source is balanced Balanced connection can improve the sound of your audio system in ways that a mere equipment upgrade can t Value While using the word bargain to describe a 4000 preamp may be a tad presumptuous within its price range the LS17 is exactly that You ll find yourself having to pay more money for less than what the LS17 offers www soundstage com the LS26 as a current product It stands 19 wide 5 1 4 high and 12 deep and weighs a decent 13 pounds It can be ordered in either ARC classic silver or basic black with or without handles Why anyone would want an Audio Research product in black and without the handles is beyond me The two knobs control volume in 104 steps and input Below these and along the bottom of the faceplate are four push
7. ded and balanced and the results were clearly in favor of the latter can t lay all of the praise on the LS17 though My Stello CDA320 CD player is fully balanced which gives it a distinct advantage when connected via its XLR outputs Indeed with levels matched as closely as possible single ended connection sounded slightly softer perhaps the better word would be muffled in comparison to balanced use In considering the LS17 as a potential upgrade do not discount having the option of going balanced especially if your source is balanced Balanced connection can improve the sound of your audio system in ways that a mere equipment upgrade can t Comparisons In sonic terms the LS17 is head and shoulders above my beloved Audio Research SP16 2495 in line stage version It did everything the SP16 did and bettered it by a considerable margin Now that statement may raise a few eyebrows for the 1500 price difference one should expect the LS17 to be better But there s better and then there s better The LS17 is better At both frequency extremes the LS17 has it all over the SP16 Through the midrange the SP16 with its tubier sound was delightful to listen to but the LS17 offered a touch of lush creamy tube sound while managing to remain far more neutral honest and even handed It also extracted more macro and micro detail Width and depth were both far more realistically reproduced via the LS17 as well Finally the S
8. gital Analog Interconnects Speaker cables Digital cables Power cords ASSOCIATED EQUIPMENT Magnepan MG1 6 QR Bryston 4B SST Audio Research SP16 with internal phono stage Conrad Johnson PV15 Marantz SA8260 CD SACD player Stello CDA320 CD player DAC Panasonic DVD F65 CD DVD V DVD A player Yamaha DVD S657 universal player Oppo DV 981HD universal player VPI HW 19 Mk IV turntable with TNT platter and bearing Super Arm Board VPI Rega VTA adjuster and VPI dropped counterweight Butternut Audio Modified Rega RB300 tonearm Clearaudio Maestro cartridge Analysis Plus Solo Crystal Oval and Copper Oval In Alpha Core Goertz TQ2 Analysis Plus Solo Crystal Oval and Oval 9 Alpha Core MI2 DH Labs D 75 coaxial cable Monster Cable and DH Labs TosLink cables Harmonic Technology Pro AC 11 Power Conditioner Monster HTS 1000 Accessories Salamander Archetype racks Symposium Roller Blocks Ultra Platform Svelte Shelves Isis shelf Fat Padz and Roller Block Jr Schneider Publishing Inc Box 20068 390 Rideau Street Ottawa ON KIN 9N5 Canada
9. inct sense of the recording venue along with deep tight bass Its highs seemed to extend into the stratosphere allowing for great portrayal of space which showed ample layering and depth together with abundant detail The LS17 does subtract one thing I d become used to with the SP16 There s less of that classic tube sound The midrange is still richly reproduced after all the LS17 still uses tubes but now it s far more neutral If I m going to have to lose something in the exchange that loss of tubey colorations would be what would have chosen One of my favorite jazz recordings is the soundtrack to Robert Altman s movie Kansas City Verve 314 529 554 2 and it s beautifully recorded Through the LS17 felt as though I understood the soundstage for the first time wasn t just peering into it from the outside could sit back close my eyes and revel in the honest sound of all the instruments not only in their placement though that was possible but in their individual sonic signatures also had a solid sense of each instrument in a very spacious soundstage yet all of this was only the opening epiphany With the LS17 there was real bite to trumpets and body to brass Bass and drums had power and piano was realistically sized With the SACD of Ray Brown s Soular Energy Groove Note Concord GRV1015 3 Brown s big acoustic bass the star of this particular show was tight full big and seemed to go a few Her
10. know know I should have given the LS17 proper burn in before giving it a serious listen But even we so called audio professionals have been known to be tempted by the new the updated the upgrade The LS17 demonstrated to me quite quickly that what thought I d been hearing was not all that my LPs CDs and SACDs were capable of delivering All of a sudden my audio system took a giant step forward on that mythical journey of reproducing the sound of live music at home Talk about teaching an old dog a new trick The devil in the details The 3995 USD LS17 looks like the classic Audio Research preamps of yore with its silver faceplate black rack handles and twin knobs It is the latest in a long line of LS line stage preamps from the Minnesota based bastion of tube audio joining CHOICE soundstagenetwork com a benchmark in its price class Review Summary Sound There was a tactile realness and a distinct sense of the recording venue along with deep tight bass Its highs seemed to extend into the stratosphere allowing for great portrayal of space which showed ample layering and depth together with abundant detail The LS17 does subtract one thing I d become used to with the SP16 There s less of that classic tube sound The midrange is still richly reproduced after all the LS17 still uses tubes but now it s far more neutral Features The LS17 is a remote controlled hybri
11. nigh on perfect Like so many of its peers it has its share of limitations you can t expect everything for its price For instance it doesn t offer the widest or deepest soundstage I ve heard nor does it sound as three dimensional as the best preamps on the market It also lacks the ultimate sparkle and extension on top as well as the fullest authority on the bottom While it is very quiet it does not have the purest blackest most silent background nor does it dredge up every last scrap of detail Despite all of this the LS17 is so cannily balanced so well conceived you may fail to notice what it doesn t do in an ultimate sense Like John Wayne its faults only make it more human and therefore more easily taken to heart If you want only the very best from Audio Research it s out there They call it the Reference 3 and it will give you everything the LS17 lacks It will also cost you more than twice as much There is room for improving the LS17 with well chosen tweaks The folks at ARC stress the quality of the power cord they include with their products claiming that using an aftermarket may not necessarily be an upgrade True Yep at least for some of the LS17 s potential customer base Audiophile that am though couldn t help but try my power cord of choice the Harmonic Technology Pro AC 11 Did hear an improvement Yep though it wasn t nearly as significant as when replaced the stock cord of the SP16 with the AC
12. tz deeper than was used to Pitch definition took a giant step forward felt like was in the company of a real standup acoustic bass being caressed into life by one of the true jazz masters of the instrument not listening to a mere reproduction If you want to hear what an audiophile means when he says a singer is in the room then pluck Holly Cole s Don t Smoke In Bed CD Alert Z2 81020 from your collection and play it through the LS17 Right from David Piltch s opening bass line you can close your eyes and hear everything especially Cole s voice right there in front of you all dimensional and real This was without a doubt the finest playback of this disc I ve ever heard in my listening room Dynamics are another strong point of the LS17 When Roy Orbison sings from soft and gentle to full throttle on the final verse of Mean Woman Blues from the LP The All Time Greatest Hits of Roy Orbison S amp P 2 507 it brought me right out of my seat The LS17 never skipped a beat sailing right on through This bears testimony to both the size and quality of the LS17 s beef up power supply You don t get thrills like these from components with poorly designed power supplies and Audio Research certainly didn t skimp on the one inside the LS17 This is one of those hidden assets that you get for your money It goes unnoticed until you start listening You might conclude from everything I ve noted so far that the LS17 is
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