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Some of you are not familiar with the outstandingly musical products the we produce here at Musical Concepts and Musical Design. What better way to get some familiarity with our products than to read the response of audiophiles like yourself to gain a better understanding of our mission and how we are fulfilling that mission.

The great majority of the comments below are taken from our e-mail responses. We will soon add actual returned registration comment cards to the page so stay tuned. Without any further ado here is the opinion of others.

 

Go directly to Musical Design commentary!

MUSICAL CONCEPTS PRODUCTS

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Our NOS 6922 vacuum tube 

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Hi John - you modified my Music Reference preamp about a year and half ago, with great results - in fact, I haven't bought any stereo gear since! An unprecedented situation - but it really sounds beautiful.

Now it's time for new tubes and I wanted to get 3 of those old  NOS 6922s from you at $49 a piece (if they're still available...). 

Thanks, and thanks again for such great work - Dock Boggs is pouring forth as I write, and he sounds pretty darn good.

Yours,
Neal S.

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Hello John,
I received the two 6922 vacuum tubes I purchased a along with the power switch for the XL-600. You have a new customer now! I am so very impressed with this tube, you were correct.  Deep bass, better punch, tighter, What a difference, I can't believe one tube can do so much. I wasn't really a believer, but thought I would try it. It was even cheaper than the price you first quoted me?
I want to say thank you!!

John M.

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John,

THE TUBES ARE GREAT!  You were right.   From top to bottom it blew the Svetlana 6N1P's away.  Things that sounded like noise in the background before, are present and articulated like never before.  Thanks.

James W.

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Musical Concepts Modifications

Hi John,

 Just wanted to let you know that I updated the Hafler P500 with the PA3 boards this week and they are awesome along with the new filter caps I just received.  Excellent design.  I’m driving a set of UREI 813s (came from Fantasy Studios in Oakland ) or a set of Quad ESL 63s that have been fully restored.  What fun!

  Thanks! Cheers,

  David

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Eight year-old Enigma 7 with Berning Microzotl and Grado RS-1 sounds terrific. Excellent bass, eerie vocals and maximum ambience retrieval are just a couple of sonic virtues. Smooth, detailed blah blah blah. Your eight year old design kicks some SERIOUS MUSICAL ass.
I am thinking of adding a tuner. Do you do any mods? Which brand and model? How much?

Jerold

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Platinum modified Hafler preamp and power amp

Hello John,
 
       I know you are very busy and get lots of emails, but I just have to share some of my thoughts with you and hope you have time to listen a bit. As I'm sure you remember, I have your Platinum  MC-3 modified Hafler DH-110 preamp, as well as your Platinum modified PA-3B boards in my Hafler DH-500 with all of the other Platinum mods that go with it. I also have a pair of Arius speaker cables. What I am going to tell you in these next few lines you probably already know. I have been listening to your modifications in my equipment for a couple of months now and am very satisfied, but it wasn't until I listened to other manufacturers gear that really makes me appreciate it more than ever. Basically, your stuff is far superior to what I have heard at some of these high end shops. I have listened to some of these systems that cost nearly as much as the house I am living in, and in a nutshell, your gear sounds BETTER!!!!! . I have listened to names like Krell, Audio Research, Mark Levinson, Macintosh, B&K, and some other amps and speakers that I have never heard of, and some of these components each cost more than the new car I drive. I used to think that you offered us blue collar people with the closest to a white collar sound that we will ever have in out living rooms on our blue collar budget, but after listening to these HIGH DOLLAR systems, I realized most of them are just overpriced, overrated electronic trophy's for egotistical people that just have way too much money to spend on HI FI. Heck, I even listened to a system that had a pair of speaker cables that cost $29,000.00. I don't know how good these cables were if you were to rate them alone, but overall the system in my living room you designed sounded better. Maybe the beauty is in the eye of the beholder, but I think I am being honest with myself when I say these things, because I haven't heard a single piece of music anywhere that I honestly preferred the sound of more than either in my living room or in your listening room on the Innersound ISIS speakers you had set up. I'm sure you know of the places I listened to some of these systems at, and I won't mention their names, but for honest sound quality, and not the status symbol of some of the overpriced crap out there, your equipment and mods stack up higher than they do!  I am dead serious about that! As I said, I am sure you already knew that, but I thought you might enjoying hearing it from someone else. Thanks again for the great sounding hardware.  I love it!
 
Scott  M.
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PA-3B versus some well known amps

John,

I really want to thank you for your prompt response on sending the PA-3B. I installed it this weekend. I was really surprised (pleasantly) by how simple it was to install and calibrate. But...I was *shocked* at the sound difference! The Hafler went from a somewhat gritty transistor amp to one of the sweetest sounding amplifiers I've *ever* heard. I'm including my VTL Tiny Triodes, Audio Research D-75, and a borrowed ARC VT100 in that comparison. Amazing. And you don't even change the power stage. Congratulations! The biggest improvement/dollar I've ever seen. Now I have to upgrade the ARC D-75. Any ideas? :-)

Eric J., Chief Technologist

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PLATINUM ULTRA MOD FOR PIONEER PD-65(TRANSPORT)

John,

Hey! The unit sounds awesome! I have a Mercury Living Presence CD of Appalachian Trail that sounds horrid on just about anything I’ve played it on. Bad tape hiss, screechy sounding violins on track 2. Now, you can still hear the tape hiss, but it sounds like reel to reel tape hiss - i.e.. more bearable, and the violins are very liquid. I used to hear very subtle differences between my Sony DVP7000/Link DAC combo and the PD-65. I wasn’t really sure which one I liked better, but thought the PD-65 had just a little more bass and was maybe a tad smoother. Well, not so subtle anymore! The PD-65 smokes it! There is more air, and I can actually hear the hall! Piano notes have a nice "round" quality to them and I don’t have some piano notes jumping out at me and others recessed. It is now a very, very rock solid soundstage. Very cool!

Thanks!

Mark
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PA-3B mod for Hafler DH-500

Had an old Hafler Dh500 from 1982 I decided to bring back to life since I wasn’t entirely satisfied with my Denon 5700 on music. I purchased Musical Concepts PA-3B mod kit consisting of 2 new stuffed boards and some misc parts such as caps and gold rca jacks. The install was pretty straightforward and taking my time consumed about 4 hours including adjustments with a DVM. It didn’t work the first time (due to my error) and I had to call John Hillig at Musical Concepts who was very gracious and helpful. It’s nice to find out a company actually has great customer service. Anyway, last night I was able to listen for the first time using the Denon as a preamp and a Pioneer PD-65 as the source, I started with Dave Brubeck’s Time Out. All I can say is wow! The drums and horns just came alive with so much more definition. The lower bass is now so tight and solid and the upper bass just sweet. I swear I hear music I never heard before. Switching to Brumeister CD#4 I was anxious to hear vocals. Boy I was not disappointed! The female voice is now so clear and just so DEFINED like never before. I had to break off early to do some chores and my son came along and popped in some new CD from ATC, la la la or something. I ran back into the room to
hear it. It was actually quite pleasant with super strong, tight bass and wonderful high freq notes along with another fantastic female vocal. (The CD is pure bubble gum pop but I nor my son could believe how good it sounded). My son kept commenting it sounded like a different cd.
Any of you with an old Hafler around, try Musical Concepts. I think I now know what people are talking about with tube amps. The Hafler is now so much more musical. -- from Jim H. --

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PA-3B CIRCUIT BOARD 

John:

I received my PA-3Bs on 2/23/01. They were of such high quality that I just couldn’t install them inside my dusty old Hafler DH-200. I wound up completely stripping the chassis, cleaning it and reinstalling everything. I put in new binding posts and I even put in new FET sockets! After I reassembled everything not only does it look beautiful, but the sound with my new PA-3Bs is wonderfully clear and transparent. The modified amp has brought new life to my Magneplanar speakers. Great job! You certainly deserve congratulations on this one.

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Another PA-3B modification

John,
3 things. First, one word on the PA-3B mod - WOW! I finished it last night and plugged it in (recall my preamp has the 110 mod installed). The sound is fantastic - I’m hearing music on my discs and LPs that I didn’t know was there. Detail, space, etc,  all great.

Jim M.

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Extensive Hafler DH-500 modification

Dear Mr. Hillig;
I recently purchased a set of modifications from you for my 17-year-old
Hafler DH-500. These mods were as follows: 2 PA-3BK replacement circuit
boards, 2 TP-500, 500 watt toroidal transformers, 2 LC-500 pairs of
39,000uf/100 volt power supply caps and Signature upgrade for PA-3B that
includes 2 hyper-fast rectifier bridge kits.


This was not a stock amplifier. I had installed your MKH-500 mod in it when
I originally built it in 1984. At the outset, I was very happy with the
MKH-500 mod and enjoyed many years of use without any problems or repairs
whatsoever. Recently, I upgraded the rest of my system and I felt that the
DH-500 was lacking in the tight, well-defined bass that  matched the
performance of the other speakers in my system. At this point, I need to
mention that this is a 4-way multi-amplified system utilizing an electronic
x-over and 3 other stereo amplifiers (McIntosh Tube-type) besides the DH-500
which drives the bass channels.

I was somewhat reticent to make such a large purchase without ever hearing
what your modifications would do to improve the sound of my amp.
I thought it over and I recalled that I had used your mods on a DH-101 and a
DH-220 in the past and was very happy with them. (Especially the DH-101) A
few of my Hi-Fi friends scoffed at my idea of spending almost a thousand
dollars on an old amp that I only paid $600.00 for new in kit form, but I
felt that I should trust my gut feeling that I would get an improvement
commensurate with such a large outlay of cash to Musical Concepts.

I have finished installing the mods following your excellent directions and
I have had a few days to listen to various types of music played back on the
DH-500. These are my observations:

1. This is literally the quietest amp I have ever heard. The music leaps out
from total silence that is almost uncanny. You can even put your ear right
in the woofers and not hear any noise or hum at all. This is something I
have never heard ANY amplifier do.

2. Originally, the bass was somewhat fuzzy and indistinct. I (and some of my
audiophile friends) attributed this to my listening room and I was planning
to use a pair of McIntosh MQ-104 environmental equalizers to compensate for
this problem. It wasn't the room. I was very shocked to hear perfectly
clear, pure bass coming out of my woofers (4 JBL 2215H's)
when I first fired-up the DH-500. I could actually hear the differences in
kick-drums, something I couldn't dream of doing before.

3. It is very hard to put into words, but there is something else about the
way this amp sounds. I would categorize it as effortlessness. There is
nothing strained about the sound of the DH-500 with your mods. What's there
is pure musicality. I use McIntosh Vacuum-tube amplifiers on all my other
channels for this exact reason. Tubes are more musical than transistors or
FETs, or so I thought until I heard this amp. All the best sonic
characteristics of tubes without the drawbacks are embodied in your
modification of the DH-500. Simply put, this amp sounds at least as good as
the very best tube amplifier!

4. (Value) What this mod has done is to transform a mediocre, somewhat dated
kit amplifier worth at most couple of hundred dollars used into something
that people expect to hear from an amp costing ten thousand dollars or much
more. No hype here. I would not be the least bit surprised to find that this
amp sounds much better than those legendary "Audiophile" products from Mark
Levinson, Threshold, Krell, etc. John, I thank you for a far more than
equitable purchase and I sincerely hope other people out there in
Audiophile-land will discover Musical Concepts and enjoy your amazing
products.

Paul H.
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PA-3B Circuit Boards, Schottky Diodes

Hello John,
     I finished installing the Platinum PA-3B boards and Schottky diodes in my DH-500 over the weekend and I have just one thing to say to you,..............WOW!!!!!!..............I am most impressed!....I spent the weekend listening and it seems the more listen, the better it sounds .....I just wanted to let you know everything went well with the installation and thank you again for all of your help.
    Now that my amp and preamp are fully modified to the platinum level, I guess now it is time to work on the digital part of my system.

Scott M.

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PA-3B Circuit Boards with Dual-Mono Power Supply

The work is done! Great improvement in the dynamics and imaging. A well worth while addition, I now have dual mono, new boards and great sound. Thank you for the really great amplifier, and the quality of the parts. Maybe now I’ll listen for a while and plunge for the Platinum!
I will write a review of the mods and the kits when I get time.

Thank you, Alastair


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Hegeman Hapi One preamp modification

Editor note: If you remember this one you may have a few gray hairs! Stu Hegeman was a well respected designer who designed many products including tubed products, I believe some of the HK Citation tube gear too! The Hapi One was an early IC based preamp.

Hi, John:


Thought I’d let you know that the Harris diodes and changes to some of the power supply caps made a significant improvement in the sound from the Hegeman Hapi 2 preamp. Not only is the sound smoother on female vocals, the soundstage is notably wider and more detached from the speakers, and the bass is really improved, much more solid, quick and detailed, and even a bit deeper. It was the best $120 I’ve spent on sound equipment. It was a lot of bang for the buck. Thanks much. I really appreciate your work.

Mark

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LC-500 CAPS, SCHOTTKY DIODES

John,

I installed the LC-500 kits and Schottky diodes last Friday without any problems.  I waited until I reviewed your cut sheet that came in the mail on Saturday before I powered everything up. 
The Adcom 555II amp is a different animal now.  The mods actually improved some aspects that I was not expecting it to.  What I expected, due to the increased capacitance, was a more controlled and definitive bass (which I
have in spades). But, I also got a larger sound stage and what appears to be a "quicker" amp that seems to enhance transients allowing more resolution.  What aspect of the mods produces this effect?  Is this due to the Schottky?
The triple bypass caps (2.2uF+0.1uF+0.01uF)?

Unfortunately, my normal digital front end is awaiting a new power supply, so I did not get the full impact of the upgrade yet (hopefully by next week).  However, I hooked up my cheap Panasonic A110 DVD/CD which normally I cannot
listen to because it is very digital and 2 dimensional.  The mods to the amp have made this player listenable and definitely more 3 dimensional.  I was not expecting this and still puzzled how an amp mod could accomplish this. 
Makes me think I am missing a whole lot of resolution that my normal digital front end provides.  I can't wait to find out!

How much is your circuit mod to remove the servo circuitry?  What areas of performance would this increase? (more natural reproduction? better soundstage? depth?).  How long does the mod take to complete?

Thanks,
Jeff H.

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Modified Adcom GFA-5500

Hi, John it’s Frederick W. from Columbus Ga. Thank you for the mod to my GFA-5500 Adcom amp. I am looking forward to Platinum. After John’s LX-Signature mod to my Adcom GFA-5500 amp, I begin to love listening to music again. 
The ups driver dropped the amp off at 5 o’clock and five minutes later I had to stop everything and call John to say, Thank You! Right out of the box, not even broken in yet it sounded fabulous, but just in case you don’t understand what 
I mean by fabulous. For about two years I have been from dealer to dealer trying to figure out why I didn’t like my fourteen thousand dollar system with music. Some said it was the speakers, some said it was my Lexicon. So for two years 
I was about to go crazy trying to find a solution. I found my solution in Musical Concepts mods, and I am so happy I just had to Tell!!!!!!!!!!!!!

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Custom modified Dyna PAS-3 with single 6H30Pi tubed line stage. New transformer installed on back panel and massive internal power supply.

 6H30Pi Dyna pre

Hi John,

The 6H30Pi is amazingly quiet and has a linear sound, meaning that in my system, it’s very well-balanced top-to-bottom. And whisper quiet. Let me also say that I am awed by the sound of the preamp.
And awed by the design. So simple! It sounds wonderful! Such imaging and dynamic range! Great job!

Thanks

Stuart

 

Musical Concepts finished products
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Signature DVD/CD player(DV-48)

Good Morning.  I wasn’t prepared for the sound, truly a quantum leap this time.  Holographic all over the house, sixty foot  plus sound stage from the listening position, lightning speed  and perfect decay, not to mention wonderful clarity and naturalness.  I am so amused to see my Labradors jump up and race out of the house to bark at something they heard on a disc; the sound is that real.  In short, we love it.  

Al A.
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Enigma VII CD player

Editors note: We always have tried to stress that our digital products sound very musical regardless of the underlying technology, bit rates and such! This customer e-mailed us about his 8 year-old Enigma CD player.

Eight year-old Enigma 7 with Berning Microzotl and Grado RS-1 sounds terrific. Excellent bass, eerie vocals and maximum ambience retrieval are just a couple of sonic virtues. Smooth, detailed blah blah blah. Your eight year old design kicks some SERIOUS MUSICAL ass.
I am thinking of adding a tuner. Do you do any mods? Which brand and model? How much?

Jerold

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SuperConnect IV Interconnect Cable

Dear John;
Well, you did it again. You underrated one of your products by saying that
the improvement would be significant. The product in question is your SuperConnect Audio cables. I would like to say that as someone who has been
an avid audiophile for 40 years that I DO know the difference between a
improvement that one thinks may be real and one that really is. I have found in the past that audio cables are one of the most over-hyped products in the
field. I have always done just fine with the Switchcraft gray cables that
sell for $3.99 a set, thank you. Well, I started running out of things to throw money at for my Hi-fi and I decided to take a chance and buy 6 pairs
of SuperConnect cables from you. I had already previously made up my mind
that I would have to listen real close once I got them to appreciate any improvement in my system. This couldn’t have been further from the truth!
These "Significant" improvements that I easily observed were:

1. It was instantly noticeable that the definition of my system had more
than doubled.

2. There was an obvious tightening-up of the sound all across the spectrum.

3. Very small sonic artifacts that I never noticed in my favorite music
suddenly appeared. (I mean in selections that I’ve heard over a hundred times!)

4. Perceived spatial differences between instruments was dramatically
improved. (Not between channels, but within each channel.)

5. Finally, (and this is the one that’s the most difficult to quantify)
there is a very noticeable airy, relaxed quality to the sound of my system that I can only describe as "That Electrostatic Sound" that people who own
electrostatic speakers use to justify their opinion that electrostatic
speakers are superior to other people’s dynamic speakers. (something I STILL don’t believe!)

So now we come to the subject of value. I have just spent very nearly a
thousand dollars for a Signature Mod for my bass amp. I felt (and still do feel) that for the money I spent, I got more than a fair value in return. It
is interesting to note that the improvement I realized in my system from
buying these cables from you was even greater than the money I invested in my bass amp and it was only about half the amount! I recalled that over the
years this is the sixth time I have purchased something from you and every
time I have gotten more value than for my dollar spent than anywhere else.

Thanks John.

Paul H.

 

Musical Design Products
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Musical Design D-100B Platinum (older unit), latest update now installed + BlackGate front-end power supply caps

 Wow, John! Whatever you did with this latest set of upgrades on the DM100 plat is truly amazing! I've never heard massed voices or instruments so clearly. There's a notable improvement in detail and naturalness over what was a really, really good amp to start with. The bass also seems stronger. I back my Maggie 1.6 units with Vandersteen 2Wq subs on their flat setting at 89db. It's a very fast, responsive combo. Punch with no thud or hangover. Seems quicker now, but I'm also hearing the "soft" part of drums and acoustic bass more clearly on my better recordings. Horns on one of my Platters CDs are so live I just felt like I could touch them -- an old recording, but the remaster is pretty darn good.  Goes to show what the old, honest equipment could capture. I hope that some day I can afford the big Black Gates!! Those must be something else again.

 
By the way, hopefully you'll get a call from John P**** out here in the SF area. I helped him with his Adcom/Vandersteen gear the other day. He needs speaker cables and an interconnect. I've also recommended that he discuss Adcom upgrades with you. He'll need them installed - don't think the does soldering iron work. Anyway..................
 
Thanks & Best!!
 
Robert S*******

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Musical Design SP-2B 

Hi John,

THANK YOU!!!!

The preamp just arrived... straight out of the box, no warm up, it blew away the older SuperMod III preamp. Pinpoint positioning, bigger soundstage and ’warmer’ more musical sound! Lots more detail, but not in that ‘too much’ fatiguing way that some electronics can overwhelm you with. The bass is better, more defined, pulling out some hidden textures on Sarah McLachlan’s "Surface" CD. I’m looking forward to ‘re-discovering’ our CD collection! Thanks again for another job well done.

Regards, Peter 

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BIG BlackGate caps, 10,000uF/80V installed into Musical Design D-150B

I gave it the wife test. She just smiled and said that it is clear as a bright winter's day. I have had to re-do the speaker placement to do this justice. The presentation is unique among amplifiers. One of the very best. I have had a lot of amps, as I have said, I do not remember hearing anything quite like it. It is simply captivating.

Dan B.

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Musical Design D-75

Lastly, been wanting to send the D75 in for the first upgrade, I like it so much as is though. The upgrade may change it in a way I don’t like, who knows.
The 75 amp is detailed, coherent and musical, I have a Anthem 40 watt tube amp too, it is more open and forward with more apparent air but can get in
your face and edgier sometimes compared to the D75. Both are great amps, the
D75 almost always pleases. ------ Alan B.

I asked to use the above comments and received this back.

Yes, you can use the comment. I love the amp. It gels with both my ProAc’s and especially my Spendors! You have good ears.

Alan

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Musical Design T-1 Transport

Just a note to say I've had 3 days to audition the transport and I can say this: It has brought more realism to the music I listen to than any single component I've added/upgraded - period.
 
John

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Musical Design D-75B Signature

"Amazed at the quality of sound this little thing puts out. Better than a Levinson product I recently auditioned."
James M., Wilmington, MA  
>>>>>>>>> Taken from comment card.

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Musical Design T-1 Platinum Transport

Dear John:

The T-1 Platinum Transport you up-dated from my previous CD-2 Signature arrived in the first week of Dec. Thank you for the timely service. I have been busily auditioning familiar and recently acquired disks on the T-1/DAC IA Platinum. The improvement in sound quality - most notably at the frequency extremes — with both good and not-so-good recordings has been revelatory. I use the term advisedly. From every indicator, the operation was a success.

I can’t think, for example, of a more demanding task for any CD player than that of translating the Abbado Mahler Fifth Symphony on DG into a convincing presence. The dynamic range of the disc is extraordinary - 16 bit recording standards notwithstanding - from whisper-like lows to truly massive, yet complex orchestral crescendi. The T-1/DAC lA Platinum combo handled it all with grace and precision revealing subtle details I didn’t think standard digital recordings capable of reproducing. Finally, I thought, my Meadowlark Herons have a signal worthy of their own prodigious reproductive capabilities. To emphasize the obvious, I couldn’t be more pleased with the sound I am hearing, granted that nothing, no matter how excellent, will ever surpass a live performance.

Here is an added note you may find interesting. I offered the MUSICAL CONCEPTS CD-3, which the T-1/DAC1A replaced, to my daughter and son-in-law. The up-grade in sound quality to their existing system was immediate and quite palpably so. Needless to say, they are as pleased with their "new" MUSICAL CONCEPTS player as I am with mine. Classic design? I would say so!

- Bernard P.