Description

I recently upgraded to what for some time have been my dream speakers, the incredible Daedalus Audio Ulysses, including the recently introduced all-poly crossover option. I want to thank the many Audiogon members who have posted about this speaker in past threads. It is those posts which led to my becoming aware of the speaker, and ultimately deciding to purchase it. I also want to thank Lou Hinkley, Mr. Daedalus Audio, for participating in the forums at Audiogon, and of course for creating and providing me with these magnificent speakers.

Although their break-in process has barely begun, I feel that I can already say that imho their overall combination of sound quality, dynamic range, bass extension, amplifier friendliness and versatility, efficiency, imaging, elegant appearance and craftsmanship, practicable size and weight, and price, borders on the miraculous. For further commentary on them, see the posts by Jazdoc, Paulfolbrecht, and Jax2 near the end of [url=http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1269555143&openflup&129&4#129]this thread[/url], and

the post by Fig in [url=http://forum.audiogon.com/cgi-bin/fr.pl?cspkr&1275949549&openflup&23&4#23]this thread[/url].

Please note that in addition to the following general comments, I have included considerable additional information under the individual component listings above.

I first became interested in high quality audio around 1978. Eventually that led me to explore the world of vintage tube equipment, which in turn led me to discover and intensively pursue a separate hobby as well, antique radio collecting.

During a period of several years during the 1990 s I was able to acquire examples of many of the vintage pieces that are considered to be classics, including most of the early Marantz tube products, among many others. I enjoyed them for a while, and in most cases eventually sold them, in part because of their high monetary value and in part because I did not have the time or the inclination to do the capacitor replacements and other upgrades that would have been necessary to put them in optimal condition. And I would have had very mixed feelings about affecting their originality, as well.

The one piece that to this day I regret selling, though, were the rare and fabulous pair of Marantz 2’s I enjoyed during some of those years. They clearly outclassed a pair of the more powerful and more famous Marantz 9’s I also owned, although condition may have been a factor in that. A major reason for selling the 2’s, though, was that they were not quite powerful enough for the speakers I owned prior to the Ulysses, at least when playing wide dynamic range, well recorded, classical symphony.

The one very early piece that I continue to use in my main system, and that I don’t ever anticipate selling, is the legendary 1954 REL Precedent FM tuner. See my further comments on it by clicking its listing above. I use it in conjunction with an H. H. Scott LM35 fm multiplex adapter (the kit version of the model 335), ca. 1961, which decodes the stereo information.

The other pieces in the system represent a mix of vintage and modern, purchased new in some cases and used in others. Some of them are considered to be classics, and deservedly so in my opinion, most notably the Mark Levinson ML-1, which I use as my phono stage (by connecting its tape out jacks to my Classe CP-60 line stage preamp).

I should add that my listening is about 90% classical, a disproportionately large amount of it on labels that are audiophile-oriented or are otherwise high quality, and 10% rock and miscellaneous.

A note on the room: Dimensions are 22L x 13.5W x 8H. The speakers fire along the long dimension, of course. The central part of the rear wall is an opening to another room, so acoustically the length dimension is quite long. The speakers are about 8 feet apart measured driver to driver; the fronts of the speakers are about 4 feet from the front wall. Listening distance is 11 feet (to mid-point between speakers). The speakers are toed in a bit more than half-way between being pointed straight ahead and being pointed directly at the listener. As you can see in the photos, the room is wood-panelled, with wood blinds on the windows that comprise most of the front wall. The Eames chair seen on the left in some of the photos swivels aside for listening, and in that position reduces reflections off of a stone fireplace which is at the center of the left wall. Finally, the two Wassily/Breuer chairs, which are used for listening, are re-positioned during listening sessions so that they are both centered, one in front of the other. If my wife is listening with me, she, being considerably shorter than I am, sits in front.

Thanks for reading!

-- Al
Read more...

Components Toggle details

    • Daedalus Audio Ulysses Speakers
    The price shown ($14,400) reflects the base price of $10,950; optional bases/stands ($600); quartersawn white oak ($900); and the recently introduced all-poly crossover upgrade option ($1950). It is absolutely uncanny how well these speakers match my requirements and preferences, to a degree that as far as I am aware (after having done extensive research prior to my recent purchase decision) no other speaker in existence can match. My requirements and preferences were/are: 1)Top-notch sound quality. 2)Wide dynamic range, specifically the ability to cleanly reproduce the peaks of well-recorded classical symphonic music. 3)Not requiring a high-powered amplifier (e.g., 200W) to do so. 4)Not requiring a subwoofer. 5)Tube-friendly impedance characteristics. 6)Good imaging. 7)Elegant, refined appearance that is a reasonable match to my wood-panelled 1950’s living room. 8)A price that is considerably less than that of a new car. I purchased these in the optional quarter-sawn white oak version, btw. “Magnificent” doesn’t begin to do justice to their appearance and build quality.
    • Valve Amplification Company REN-7070 mkIII
    65 watts per channel of 300B, Class A, zero feedback magic. Purchased by me in 2011; I believe it was manufactured about 10 years earlier. The tubes I am using are a new (2011) set of Chinese 300B-98's, purchased from VAC by the previous owner, and vintage Sylvania 6SN7's.
    • DEQX HDP-5 Digital Preamp/Processor
    Digital Preamp/Speaker & Room Correction Processor -- see the "Is DEQX A Game-Changer?" thread for further discussion
    • DEQX/Earthworks M23 Calibration Kit
    Calibrated measurement microphone kit for use with DEQX HDP-5.
    • Stax Lambda Pro Headphones w/SRM-T1 Tube Amplifier
    From the late 1980s. Being electrostatic headphones they nicely complement the dynamic speakers I've had, and help me to sort out room effects or amplifier and speaker-related issues from recording or front-end related things. As well as making it possible to listen when listening via speakers would interfere with my wife's activities.
    • Herron VTPH-2 Phono Stage
    Wonderful sounding, versatile, beautifully engineered phono stage. The many accolades that have been bestowed here and elsewhere on both this phono stage and on Keith Herron as a wonderful person to deal with are more than well deserved.
    • Bryston BCD-1 CD Player (transport section)
    Using it as a transport, with AES/EBU output connected to DEQX.
    • Sota Sapphire Turntable
    Purchased in 1983; still looks and works like new. Built like the proverbial tank. I can literally pound my fist on the plinth during play, with no audible effects whatsoever. Beautiful oak finish.
    • Magnepan Unitrac-1 Tonearm
    Purchased in 1983. Highly regarded and rightly so. Includes in-play adjustability of vta/sra.
    • Audio Technica AT-ART9 Phono Cartridge
    Purchased in 2016.  A very nice upgrade, replacing the Grace F9-E variants I had been using for the majority of the past 35 years.  Especially notable among the improvements provided by the ART9 are increased detail and better definition in the treble region, and improved dynamics.
    • Radio Engineering Laboratories Precedent FM Tuner
    The legendary REL Precedent FM tuner, designed by former associates of Edwin Armstrong. Mono, with multiplex out jack for connection to external stereo multiplex adapter. From 1954; I purchased it in 1992. Other tuners I've had in my system at one time or another include two Marantz 10B's, a Carver TX11, a McIntosh MR71, and numerous Scott and Fisher units. The REL outperformed all of them sonically (at least in the case of the specific units that I had), and was equalled in station-getting ability only by the 10B. However every now and then it doesn't work properly, I believe due to either a bad diode or capacitor in the detector section. I'm hesitant to start changing parts, though, at least without being certain of exactly which part is the culprit, because I don't want to destroy its originality.
    • H. H. Scott LM35 Multiplex Adapter
    Stereo Multiplex Adapter, used in conjunction with REL Precedent. Kit version of the model 335. Ca. 1961.
    • Channel Master Roof-Mounted FM Antenna
    With rotator.
    • Tandberg TCD-3004 Cassette Deck
    One of the best cassette decks ever made. The 80 or so cassettes in my collection include much of the excellent Connoisseur In Sync series from the 1970's and 1980's. The deck is ca. 1980. I acquired it in the mid-90's.
    • Logitech Squeezebox Touch
    Using it just for Internet radio. A technological marvel given its low price. Too bad it is no longer made.
    • Nitty Gritty 2.5FiMk2 Record Cleaning Machine
    Record Cleaning Machine. Purchased during the 1990's. I used Torumat fluid until it was no longer available; Nitty Gritty Pure2 since.
    • DB Systems DBP-2JAU/5 Switchbox
    Line-level switchbox used to select whether the FM tuner combo or the cassette deck is routed to the DEQX
    • Audience aR2p Surge Suppressor/Conditioner
    This suppressor/conditioner plugs into an outlet of my 20 amp dedicated line. A Wiremold power strip (listed below) plugs into the aR2p and expands its 2 outlets to 10. The Venom Defender surge suppressor/conditioner (listed below) plugs into the power strip, to provide some degree of filtering of noise that may be coupled between components.
    • Shunyata Venom Defender Surge Suppressor/Conditioner
    This plugs into the Wiremold power strip (listed below) to provide some degree of filtering of noise that may couple between components.
    • Wiremold UL210BC Power Strip
    This well-made power strip expands the 2 outlets of the Audience aR2p surge suppressor/conditioner to 10.
    • Hammond Power Strip
    This plugs into the Wiremold power strip (listed above) to provide additional outlets. It also allows me to switch off the wall wart power supply of the Squeezebox when listening to other sources.
    • Analysis Plus Toslink Cable
    Squeezebox to DEQX, 3 meters
    • Mogami AES/EBU Cable
    Mogami "Gold" AES/EBU Cable, CDP to DEQX, 6 feet
    • Various Pro-Oriented Interconnects -- Mogami, Pearstone, Comprehensive
    Mogami Neglex 2534 quad cable with TecNec RCA connectors (from Markertek.com) between preamp and power amp; Mogami, Pearstone, and Comprehensive (B& H house brand) single-ended ic's for various other analog interconnections.
    • Vampire Wire Speaker Cable
    3 meters, 12 gauge.
    • Signal Cable Digital Reference Power Cords
    One 6 foot cord for the CDP; two 13 foot cords for the VAC dual mono amplifier, which uses two power cords. These are nominally intended for digital components, but the 12 gauge wire they utilize seems adequate for use with the amp as well, and I chose them particularly because of the excellent shielding they provide. In my setup these cords are routed such that they pass fairly close to the phono stage, which presumably increases the importance of their shielding. Also, the fact that the amplifier operates in class A, drawing essentially constant current regardless of the dynamics of the music, presumably lessens the importance of how responsive the cord may be to abrupt changes in demands for current.
    • Stock Power Cords
    Stock cords on all components other than the CDP and the VAC power amplifier.
    • Adona Multi-Element Isolation Platform
    With brass cones. This is used under the Herron phono stage. In addition to being well designed for its purpose, its craftsmanship and beauty make this practically a work of art.
    • Mapleshade Maple Platform & Isoblocks
    4 inch version; used under Power Amp.
    • Mapleshade Isoblocks
    Under Daedalus maple bases.
    • Sims (Sumiko) Navcom Silencers
    Vibration control footers, used under REL Precedent tuner. Ca. 1992.
    • Planax PX Record Clamp
    ca. 1983.
    • Zerostat 3 Milty
    Anti-static gun.
    • LAST Stylus Cleaner
    Stylus cleaner.
    • 20 Amp Dedicated AC Line, New Circuit Breaker Panel & Wiring
    New 20 amp dedicated AC line, new circuit breaker panel, new inside and outside wiring to where the utility company's overhead lines attach to the house. All installed in 2010-2011.

Comments 113

I miss you, Al.  You were the best of us.

cymbop

Owner
Hi Will,

For a couple of decades prior to acquiring my Herron VTPH-2 (not 2A) a few years ago I had used the phono section of a vintage Mark Levinson ML-1 preamp as my phono stage, accessing its phono section via the preamp's tape outputs.  So I can't comment on how the Herron phono stage compares with other currently available units.

Regarding loading, I tried 1K, 47K, and no loading with the Herron and my AT-ART9.  The differences were slight, but I settled on no loading (i.e., on the nearly infinite input impedance the Herron's FET-based LOMC input stage presents to the cartridge when loading plugs are not connected on its rear panel).

Best of luck.  Regards,
-- Al
   

almarg

Hello Al,

    I am wondering whether you can provide your inputs on the phono stage. We've some similar setups as ART9 and SOTA table. Any preference or recommendation of the Herron VTPH over the others? What loading is for the ART9 when paired with VTPH? Please kindly advise. Thanks for your kind attention.

Regards,
Will

bbww

Nice!!!
I have a pair of those exact chairs. Same color as well.  

boxer12

Owner

Thank you kindly for the nice words, Hazyj.

I’ve never heard a 30/30, but based on many comments I’ve seen over the years by owners of that amp I would expect that if it provides enough power for your application it should sound at least as good as the 70/70, and perhaps better.  One reason it might sound better is that since it has four 300Bs rather than eight there is less possibility for tube characteristics to be mismatched to a degree that might be audibly significant.

I should also mention that I’ve been delinquent in updating my system description.  Last year I sold the 70/70 and replaced it with a solid state Pass XA25, which I’ve been delighted with.  With my speakers, at least, which have an extremely flat and benign impedance curve, as well as sensitivity in the upper 90s, it comes amazingly close to the VAC in terms of dimensionality, imaging, liquidity, and other traditional fortes of high quality tube amps. It’s a bit less rich sounding than the VAC, but I interpret that as an increase in accuracy, which is fine as far as I am concerned.

Also, my decision to move on from the 70/70 was driven mainly by non-sonic factors, including the likelihood of greater reliability in the years ahead considering the age of the VAC (during my seven years of ownership the VAC required two trips to the factory for repairs, which were not trivial  undertakings given its 100+ pound weight); the fact that even though both amps operate in class A the XA25 puts only 240 watts of heat into the room compared to what I believe is something like 700 watts for the VAC 70/70; and the cost that would be involved in re-tubing eight 300Bs if and when that were to become necessary.

Thanks again.  Best regards,

--Al

almarg

Hi Al! Thanks for giving me a peak into the world of "The Master".

:-)

Question if you don't mind: any chance you've ever heard a Ren 30/30 and been able to compare the sound signature to the 70/70?

Enjoy!
J

hazyj

Owner
Johnyb1982, apologies for not noticing your post sooner; I just saw it today.  If it still matters, I've never heard the M40.1 and MC275, either singly or as a combo, but I do have some knowledge of their characteristics.  And I suspect they would be a suitable pairing.

Jim (Lowrider), thanks for the nice words.  I replaced the BrickWall with the Audience conditioner at about the same time as I was making a number of other changes to the system, as described below in my post dated 10-25-2015.  So I can't say what difference, if any, the change of conditioners may have made.  There was nothing in particular that prompted that change, btw, other than the fact that I had been using the BrickWall for many years and the Cable Company had a special deal at the time on the Audience.

One of the associated changes I made at that time was to purchase and install the Shunyata Venom Defender listed above into the Wiremold Power Strip into which most of the components in the system are plugged, to reduce and hopefully minimize any coupling of noise that might otherwise occur between the power connections of digital and analog components.    (The Audience conditioner just has two outlets; the Wiremold plugs into one of them, and provides 10 outlets).  But as you'll see in the following paragraphs, the Venom Defender may not even have been necessary.

The only components in the system which contain digital circuitry are the Bryston CDP, the DEQX HDP-5 which serves as my preamp in addition to providing speaker time alignment, room correction, and other functions, and the Squeezebox.

The Squeezebox is just used for non-critical Internet radio listening, and is plugged into a Hammond Power Strip that in turn plugs into the Wiremold power strip.  Which allows me to conveniently turn off its wall wart power supply when I am listening to my critical sources (those being phono and CD).

The DEQX is a mixed signal analog and digital component, which in turn connects to nearly everything else in the system, so isolating its power source from one or the other type of component in the system doesn't seem likely to be meaningful.  And I suppose doing that might contribute to ground loop issues, given especially that most of the interconnections in the system are unbalanced.

That leaves the CDP, which I'm using just as a transport, with its AES/EBU output connected to a corresponding input of the DEQX.  When I'm listening to LPs it is usually in standby mode, and is therefore presumably not coupling any noise into the analog components or the DEQX.  And when I'm listening to CDs the coupling path that is potentially relevant would be from the CDP to the power amp.  But I've never sensed that to be an issue, and the arrangement seems to work well.

Thanks again for your nice comment.  Best,
-- Al

almarg

Hi Al,
  I've looked at your system page in the past, but never commented. Your selection of components is very well thought out and the room looks like a great place to sit back and be engaged in beautiful music. It seems like a private concert hall, maybe a home version of the Musikverein.

Since you changed your power components, I would like to know how you separate your analogue from digital contamination. You have a single dedicated AC line as I do, and the Audience is an excellent conditioner, but you are no longer using isolated receptacles (BrickWall). How is it working out for you?

lowrider57

Hi Al,

Just looking for speakers that would fit best my Mcintosh MC275 in Mono. I have red great reviews of the Harbeth M40.1. By any chance, do you think they would be a good fit based on their specs^

Kind reagrds,

J

johnyb1982

Owner
Replaced my Soundsmith-retipped Grace F-9E Ruby moving magnet phono cartridge with an Audio Technica AT-ART9 low output moving coil cartridge.  While the Grace F-9E series has to me been so satisfactory that I have used it in various incarnations for most of the past 35 years, the ART9 has proven to be a very worthwhile upgrade.  Especially notable among the improvements it has provided are increased detail and better definition in the treble region, and improved dynamics. 

Bill (Brownsfan) and Barry, a very belated thank you for your kind comments below.

Best regards,
-- Al

almarg

Like others, I wanted to thank you for sharing your knowledge with us. I read all your posts and have learned much from you. Beautiful system.

barrysandy

Al, Really cool system and room. I'd love to have a chance to audition the Daedalus speakers. As others have stated, your expertise and willingness to help others is a tremendous asset to us all. Thanks for all you do!

brownsfan

Owner
I've updated the photos of the system.

Dan and Needfreestuff, thanks so much for your very gracious comments! Always a pleasure to discuss audio with sincere and gentlemanly class acts such as yourselves.

Best regards,
-- Al

almarg

Want to thank you for passing on your expertise and knowledge to everyone here on audiogon, we wouldn't be the same without you. Good to see your enjoying your system changes. Great collection of equipment, I'm sure it sounds amazing. Keep up the good work and happy listening.

needfreestuff

Al. I must add that I am quite pleased for you as well, You've contributed so much helpful information to those of us that need it, The fact that you are able to enjoy your music and system even more with the recent changes, is very well deserved, and is cause for celebration

Enjoy heartily, regards,
Dan

islandmandan

Owner
Thanks, Charles. Your kind comment is much appreciated, as are your always wise contributions to the forums.

Best regards,
-- Al

almarg

Al,
As expected, well reasoned rationale for all of your system upgrades. A terrific audio system just got better. Congratulations.
Charles,

charles1dad

Owner
I’ve just made several changes to the system, described below. I’ll update the photos at a later date.

1)Replaced my previous phono stage (the phono section of a vintage Mark Levinson ML-1 preamp, accessed via its tape outputs) with a brand new Herron VTPH-2. Quick initial impressions, using it with my Soundsmith re-tipped vintage Grace F-9E moving magnet cartridge, are that the many accolades and almost unanimous praise this phono stage has received here and elsewhere are more than well deserved. And I can say with total assurance at this point that all of the very positive things that have been said about how wonderful Keith Herron is to deal with could not be more true.

2)Added an Adona Multi-Element Isolation Platform with brass cones for the Herron to rest on. In addition to being well designed for its purpose, its craftsmanship and beauty make this practically a work of art. Paul at Adona was very good to deal with as well.

3)Replaced my BrickWall surge suppressor/line conditioner with a combination of an Audience aR2p, a Shunyata Venom Defender, and a Wiremold UL210BC power strip. The aR2p surge suppressor/conditioner plugs into an outlet of my 20 amp dedicated line. The Wiremold power strip plugs into the aR2p and expands its 2 outlets to 10. The Venom Defender surge suppressor/conditioner plugs into the power strip, to provide some degree of filtering of noise that may be coupled between components. I also have a Hammond power strip plugged into the Wiremold, which provides some additional outlets but also allows me to switch off the wall wart power supply of the Squeezebox when listening to other sources. I haven’t noticed any adverse effects of the wall wart on the sonics of other sources, but switching it off for critical listening to other sources seems like good practice.

4)Replaced the stock power cords of my VAC amplifier with Signal Cable MagicPower Digital Reference cords. These are nominally intended for digital components, but the 12 gauge wire they utilize seems adequate for this purpose, and I chose them particularly because of the excellent shielding they provide. In my setup these cords are routed such that they pass fairly close to the phono stage, which presumably increases the importance of their shielding. Also, the fact that the amplifier operates in class A, drawing essentially constant current regardless of the dynamics of the music, presumably lessens the importance of how responsive the cord may be to abrupt changes in demands for current.

Best regards,
--Al

almarg

Owner
Hi Neil,

Great to see you here, and thanks for your comments, which of course I always value highly! Regarding the PS Audio power regenerators, given the large current draw of my amp (which is indicated as 1,000 watts in the manual, although I suspect it may be somewhat less than that), and the multitude of components in the system, if I were to go with a regenerator I would probably want the P10, which costs $5K. And in the case of a power regenerator I don't think I'd feel fully comfortable buying used. Also, the many anecdotal reports I've seen over the years about these and other regenerators seem to be divided as to whether they do more good than harm, which leads me to conclude that the benefit they may provide is system dependent and therefore not entirely predictable. Finally, and perhaps most significantly, there would be no reasonable place to put it in my living room setup :-)

In a few minutes, btw, I'll be posting an update about the latest changes to the system, some of which I've mentioned to you.

All the best,
-- Al

almarg

Looking Good Al. I'm sure it sounds even better than it looks.

I was wondering why you didn't consider a used PS Audio P300 Power Plant instead of the AC filters in your system. I'm sure that you have a powerful reason for doing so. I am such a huge fan of their Power Plants and have done comparisons in my system over several years that I believe that this Wave Generator made the biggest improvement in my system of anything else (and you have listened to my evolving system over the course of many years). You know that I have been a critical listener for 53 years. I'm certainly not challenging your decisions as I have just witnessed the remarkable improvements in your music system and not heard the sound, but I'd love to hear your feelings, both technical and personal as to why filters were a better choice for you.

Your buddy Neil

stimpy1226

Owner
Replaced Classe CP-60 Preamplifier with DEQX HDP-5 Digital Preamp/Speaker & Room Correction Processor. Implemented various associated interconnection changes, including connecting my CDP and Squeezebox to the DEQX digitally, rather than utilizing their internal DACs and analog outputs. I will be posting updates on my experiences with the DEQX in the "Is DEQX A Game-Changer?" thread.

Best regards,
-- Al

almarg

Owner
Cdk, thanks so much for your exceptionally eloquent comments. The adjectives you used, especially "articulate" and "gracious," certainly apply to your words as well. And also "informed," as evidenced in part by your comments about the chairs.

Glad I was able to be helpful in your threads. And all the best in your audio (and other) endeavors.

Best regards,
-- Al

almarg


Hi Al,

Writing to thank You for several things.

First, you have weighed in on two of my recent threads in ways that were very helpful And informative.

Second, your system page provides very interesting links which, again, add to my paltry audio knowledge.

Finally your entries and your system page are written in a style that is an enjoyable combination of confident, informed, articulate and gracious; an uncommon blend in my experience.

Thank you for your recent suggestions about a phono preamp and for the elegant, understated style of your listening space. I've been a fan of the Wassily and Eames chairs for some time. Makes me imagine just how nice your system sounds.

Very Best to You,

David

cdk84

Yes Al, Brickwall is pretty nice :-) Years back, when I first purchased the BrickWall, I did compare, plugging the amp directly to wall Vs into Brickwall. But I could not make any difference. Might be, a high quality wall outlet might change that. But who knows.

I will go in details on the link that you sent. But a cursory look does explain why ground loops can happen. I am more worried because of the TVC I use. It is highly sensitive and TVCs are know to pickup hums easily. I have isolated that by keeping it away from rest of the components. I will upload the new pics on my system page soon. But the TVC is extremely transparent. I tried it against a $4K active preamp and could not hear much difference. In fact I preferred the TVC over that preamp.

Anyways, Thanks much for your inputs on the topic. It is pretty helpful!

milpai

Owner
Michaela, Milpai, Albert, thank you kindly for the very nice comments.

Milpai, I have everything plugged into the BrickWall line filter/surge protector. I see that you use one also, btw; great minds think alike :-)

Due to the multitude of source components I have, as well as my headphone amp, I have more power plugs than the BrickWall can accommodate. So I plug some of the less critical things into a good quality Hammond power strip, which in turn plugs into the BrickWall.

Obviously protection against lightning-induced or other power surges is one reason I have chosen to have everything powered via the BrickWall. Another consideration is that my amplifier operates in class A, so its AC current draw does not fluctuate significantly with the dynamics of the music, as it would with a class AB or class D amp. I suspect that is a major reason the BrickWall doesn't seem to have any adverse effects on the sonics of my amp, in contrast to a few less than positive experiences with it that I've seen reported. Also, the noise filtering the BrickWall provides between duplex outlets presumably helps against the possibility of amplifier generated noise being coupled to other components.

Those are also reasons why I haven't installed a second dedicated line, as many here do. An additional reason being that having interconnected components powered via separate runs can sometimes contribute to ground loop issues, depending on the internal grounding scheme of the components and on the nature of the AC wiring. Especially if the interconnections are unbalanced, as they are between my preamp and power amp.

Re "the nature of the AC wiring" and ground loops, you may find pages 31 to 35 of this paper, which member Jea48 (Jim) had called attention to here a while back, to be informative and perhaps relevant to your new installation. I'm using 12/2 NM-B (Romex), btw, the run being about 35 feet from breaker to outlet.

One final point, which factored into my choice of the BrickWall rather than more exotic and expensive forms of power conditioning: My area is almost entirely low density residential, with no industry and almost no commercial development, so presumably the power quality here is relatively good.

Thanks again. Best regards,
-- Al

almarg

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