Lyngdorf TDAI 3400

[tmallin]

Yes, I am using Qobuz Connect now. Qobuz Connect was announced to me as now officially available via an email I received on on the morning of May 15, 2025. We music streamers have been waiting for this for a couple of years. By late that evening, Lyngdorf had updated its firmware from version 3.5.0 to version 3.6.0 to allow use of Qobuz Connect with Lyngdorf models like my TDAI-3400 units. I also saw an announcement from PS Audio about its Qobuz Connect firmware update as now being available.

The new 3.6.0 firmware also corrects an issue with many airable FLAC radio stations which were not playable via airable with version 3.5.0. These now play fine via airable, as they have long been playable via Roon's Live Radio function through the Lyngdorf.

My preliminary use indicates that Qobuz Connect works very smoothly without any glitches that I've noticed. The volume control within Qobuz Connect also works smoothly, much more so than the one in Tidal Connect. The volume control within Qobuz Connect offers smooth changes in one dB increments. The Lyngdorf also automatically creates a new separate input for Qobuz Connect.

The primary need for Qobuz Connect with the Lyngdorf is for folks who don't have a Roon server and thus could not directly stream Qobuz content via the Lyngdorf without using AirPlay or some non-free third-party service like MConnect or JPlay. AirPlay is free, but limits streaming to CD Redbook resolution of 44.1/16. Many other streamers have proprietary software which has previously allowed native high-resolution streaming of both Qobuz and Tidal. Examples include the BluOS software used by several companies including BlueSound and NAD, and the Lumin App. The Lyngdorf firmware did not allow this native connection to Qobuz before the 3.6.0 release.

Qobuz Connect also may have the potential to sound a bit better than listening to Qobuz tracks via Roon. As with JPlay and MConnect, with Qobuz Connect you don't stream Qobuz music through your Roon server or AirPlay. You thus don't need Roon or a Roon Core at all to use Qobuz Connect. And you also don't need to use whatever proprietary streaming app your streamer uses--e.g., BluOS, Lumin App, etc. As Qobuz touts, with Qobuz Connect, no third party service (e.g., no JPlay, no MConnect, no AirPlay) is needed to stream music straight from Qobuz servers via the Qobuz app on your iPad or other control device.

Of course, it has always been possible to stream Qobuz directly to the Lyngdorf from the Qobuz app on a computer. You just needed a USB, other digital, or even and analog connection. This could be done, perhaps with the aid of adaptors. You could also use an iPad Pro to your Lyngdorf via USB cabling and some adapters. See my discussion at this thread. Either one of these methods can be regarded as a bit or more clunky and perhaps sonically sub-optimal. The iPad Pro connection is especially unwieldy because for a long-term connection it requires both wired USB and power connections to your iPad via adaptors. With Qobuz Connect, your iPad, iPhone, or other control device is untethered and the connection between Qobuz servers and your Lyngdorf streamer becomes direct and native.

As far as the Graphic User Interface, Qobuz Connect is, I think, better looking and more informative than the standard Qobuz interface which was already quite attractive and informative. The Qobuz Connect GUI is also, in my opinion, more attractive looking than Roon's GUI. However, I'm sure most everyone will agree that Roon's metadata and the degree of interconnectedness of that metadata is still unmatched. In addition, only Roon smoothly integrates Qobuz, Tidal, and your own local music files into one consolidated library.

Whether Qobuz Connect actually sounds any better in your system than Roon, JPlay, MConnect, or any other method of playing back Qobuz content, I will let you decide. Preliminary comparisons indicate that in my systems Qobuz Connect sounds at least as good as any other method I have of playing Qobuz music.

 

[Iamrael]

Thanks for the feedback.
I’m using the MP-50 and Lyngdorf hasn’t provided software update yet in order for me to try.
There is a major glitch for MP users since the latest iOS update that makes the the user interface inaccessible on Safari so hopefully when they release the fix for that it will also have the Qobuz update as well.
Thanks again and best regards.

 

[tmallin]

Having now listened more to Qobuz Connect and compared the same material with Qobuz via Roon, here are some additional thoughts.

I will go out on a limb and say that at this point, in my system, Qobuz Connect sounds a bit clearer but a bit less warm than the same material via Roon. The sonic differences are quite small, but I think they are there. Qobuz via Roon playing the same material as Tidal via Roon has always sounded just a bit clearer but brighter than Tidal via Roon. Qobuz Connect eliminates any excess brightness. Spatially, I really don't hear much difference at this point between Qobuz Connect and Qobuz via Roon.

Qobuz Connect seems to drain the battery of my iPad controller faster than any other method of listening. This is not a problem, but it is quite noticable.

Qobuz Connect does not display playing times with the same detail as other methods of playback. Playing time for a disc is not shown. Playing time for individual tracks is not shown. Once a track is playing, elapsed time for that track and time remaining are displayed. That may or may not bother you, but this is a real difference in the metadata displayed. Perhaps this will be fixed in a future update.

I have not found a way to delete or clear the cue for selected Qobuz Connect tracks. Maybe it's there, but I have not located such a control. Such controls are present in regular Qobuz, Roon, and JPlay.

 

[tmallin]

I just discovered how to delete/clear Qobuz Connect play history and cue. If you are playing music via Qobuz Connect, the screen showing the track being played in full screen mode has a "Listening" label at the top.

Swiping right from that screen moves you to the History screen. From there you can click on "Empty" button at the top right to clear your listening History.

Swiping left from the Listening screen brings you to the "Play queue" screen. There is an "Edit" button at the top right of that screen. From the Edit button you can click on the three vertical dots to clear the play queue.

 

[KrellFan1]

For those with more complex systems than mine, the TDA 3400 can be enhanced by purchasing one or both of the optional HDMI 2.1 input/output module or the high-end analog input module. See the descriptions of these modules on this page. While I'm sure you can still buy a better phono preamp than the optional Lyngdorf module includes, you could feed the Lyngdorf the analog output of your phono preamp.

For up to eight amplifier channels and at least double the output power per channel, you could feed the balanced analog output of the 3400 into Lyngdorf's MXA 8400 multichannel amp. This amp has the same footprint as the 3400 and weighs only 22 pounds.

My system, being streaming only and using relatively high sensitivity speakers, does not need any of these options, but they are there for those who do. I specifically chose not to add the optional boards to my 3400, reasoning that in addition to the added cost and unneeded functionality, it is never helpful sonically to add additional demands to the power supply of a unit, much less any additional electrical interference within the chassis which might be caused by operation of the unneeded optional boards.

Tom, I actually just pulled the trigger on a Lyngdorf MXA-8400 to pair with my MP-60. I’ve had the MP-60 for 4 years and until recently I never thought to give it a serious listen for 2 channel. But OMG, it has totally blown me away! I’m running a USB directly from my K22 player into the USB in on the MP-60. The SQ sleighs my Tambaqui DAC paired with Makua preamp. They’re both tremendous pieces but as Peter Lyngdorf argues, the most important source in the chain is the room itself and they do indeed make the “room perfect.”

Wednesday I’m installing a FANTASTIC AES cable from Cerious Tech and will be curious to hear how this performs compared to USB. There is clearly something to be said for a straight digital path from K41/K22 directly into the MP-60. We’ve known it to be a wonderful SSP for video. Never realized until recently that it was equally as impressive as music player.

In any case, I’ve had this fabulous Krell 5200 XD but since I’ve added Atmos channels I needed to buy a 3rd stereo amp. Now I can free up some space and lose the 3rd amp.. My Krell 300XD amp is still a keeper for me.

 

[Holmz]

Tom, I actually just pulled the trigger on a Lyngdorf MXA-8400 to pair with my MP-60. I’ve had the MP-60 for 4 years and until recently I never thought to give it a serious listen for 2 channel. But OMG, it has totally blown me away! I’m running a USB directly from my K22 player into the USB in on the MP-60. The SQ sleighs my Tambaqui DAC paired with Makua preamp. They’re both tremendous pieces but as Peter Lyngdorf argues, the most important source in the chain is the room itself and they do indeed make the “room perfect.”

I’ll have to look at the back of the MP-50 or look in the manual.
Is this the main way to do 2 channel?

I regularly stream from the iPad to the TV and TV to the MP-50, but I am not sure that is 2-channel., or more like a 5.x sound.

I as thinking of a BluRay player, but it sound like I would need a transport directly into the USB? Or not into an HDMI ??

 

[Iamrael]

The MP-50 has no analog input. The only way to use a wire connection is with a digital cable. It can be Ethernet, USB, coax, hdmi or aes/ebu.
Unless you enable “post processing” in the source setup menu your source will automatically determine how many channels, and which speakers will play.
If you are using hdmi from your Blu-ray player and you play a stereo disc or stream a stereo signal from Qobuz, Utube, etc., then you will only hear stereo from your (front) left and right speakers with the caveat mentioned above.

 

[Holmz]

The MP-50 has no analog input. The only way to use a wire connection is with a digital cable. It can be Ethernet, USB, coax, hdmi or aes/ebu.
Unless you enable “post processing” in the source setup menu your source will automatically determine how many channels, and which speakers will play.
If you are using hdmi from your Blu-ray player and you play a stereo disc or stream a stereo signal from Qobuz, Utube, etc., then you will only hear stereo from your (front) left and right speakers with the caveat mentioned above.

Yeah - my question was more of…
Currently I stream from the iPad (often an audiobook), through the TV, and then that goes out to the 2-channel/5.1.
How does it sound better going from a transport into the USB and out the 2-channel?

I am not sure I even know how to tell the MP-50 that it is 2–channel that I want, so any clues might be helpful.

 

[Iamrael]

I can help you with this for sure but please clarify what equipment you have (including speakers) and what type of music/movie/audiobook files you are using.
Are they on hard drive, streamed from Qobuz (or the likes,) cd, Blu-ray, all of the above?
You’re #66 post seems to have been prompted by a desire by you to see if the Lyndgdorf can fill a gap and be used for higher performance than what you’ve thought was possible.
I think it likely can!

 

[Holmz]

I can help you with this for sure but please clarify what equipment you have (including speakers) and what type of music/movie/audiobook files you are using.

I use Spotify and we both use her Audible account for the books.

Are they on hard drive, streamed from Qobuz (or the likes,) cd, Blu-ray, all of the above?

I do have some on HDD - which were as uncompressed and AAC I think.
I’ll need to find the drive after all the moving.

You’re #66 post seems to have been prompted by a desire by you to see if the Lyndgdorf can fill a gap and be used for higher performance than what you’ve thought was possible.
I think it likely can!

… We had moved house and we got an LG OLED, which prompted the haus-boss to haul me to the shops to look at sound bars.
After she literally stepped backwards from the sibilance I offered to “fix the sound”.
So the home theatre part was/is new to me, and it is a bit of a challenge IMO to mixed HT with 2 channel.
(Maybe others have no issues.)

The system has changed a bit from the previous house, and is now as follows:
LG-TV —> MP-50 —> Nagra Classic amp(s) —> Vandersteen TreoCT.
The other channels are fed with a combo of AIYAMA A70 amps, into Vandersteen VCC-5 Center channel and Vandy VSM wall mounts for the surrounds. I also have a couple of March Audio p501s, and will likely end up running the center channel off of one of them. The AIYAMAs are very good for $70, but I viewed them as temporary.

My 2 channel side is pretty solid, but focussed on analogue TT.
There is a bypass on my preamp so I do not need to have it on for the TV/AVP to play. And just turn it on for when I am doing 2-channel.
I do have 2 RME ADI Pro DACs, which can also be used ADCs… and I have done that.
I have hooked up the iPad into the RME and it sounds pretty good, but the TV does it fine for listening to audio books as well.

However the Haus-boss has recently been pestering me for a way to play CDs…
Hence I have been looking at CD players and transports including just throwing a BluRay onto the shelf. Or Schenling transport etc.
I resisted the idea of even mentioning a music streamer… However, her good friend said that she was setting up a Roon player, so that may be acceptable as it is perceived as “female friendly”.

I almost got a used CD player, but I was too slow and it is taken.
If plugging a transport into a TV and letting it rattle through the system and coming out as 2 channel is good, then maybe I should be doing that.
Most I am rubbing my pate, and stroking my beard as what to do.

 

[Holmz]

I didn’t catch what preamp you use for your analog but it doesn’t really make too much of a difference.
You also didn’t mention the use of any subwoofers.

Nagra Jazz - but let’s ignore subs.

Having the analog source makes it impossible to use the Lyngdorf in a straightforward manner since it has no analog inputs.

Yeah no… I have the 2 channel side for that.

The only way that you can implement the Lyngdorf’s “Room Perfect” magic into your system when listening to vinyl is to convert the analog signal to digital.

Yeah no… It needs to be WAF friendly and easy, so that CDs can be played..

You need an ADC converter that has inputs/outputs such as this:

Optical Box E Phono – Pro-Ject Audio Systems

Multi-purpose phono preamplifier with A/D conversion and 2 output options: Line level and digital optic! Anyone who wants to use the record player together with

www.project-audio.com

There are similar units that are more expensive but I have no opinion on how they compare. I never needed to use one.
There are many different camps of vinyl users with different opinions! which then brings up the analog v digital debate, I’m not going there!
If the purpose of your inquiry for advice is solely to determine whether you prefer using the Lyngdorf as the only switching device for ALL your sources based on purely your emotional musical experiece and you are willing to set aside any/all of the analog v digital minutia, as well as implementing DSP for 2 channel then I can further describe the methods I used with the Lyngdorf that have enabled me to rid myself of Audio Note, Constellation, Dartzeel, Robert Koda, Zanden, Lamm, Audio Research, Pass Labs, passive preamps, no preamp, and more.
This is NOT a pissing contest for me, just trying to share my joy.

Go Knicks!

Someone mentioned bring in the digital to an MP-50 I thought, hence my question.
I was looking at a TDAI - but the only Lyngdorf I have in the chain is from the TV, and it outputs to the pass through XLRs on the preamp to rattle down through the L/R of the 2-channel… as well as the surround speakers, etc.


This next part is what piqued me interest and the question:

Tom, I actually just pulled the trigger on a Lyngdorf MXA-8400 to pair with my MP-60. I’ve had the MP-60 for 4 years and until recently I never thought to give it a serious listen for 2 channel. But OMG, it has totally blown me away! I’m running a USB directly from my K22 player into the USB in on the MP-60. The SQ sleighs my Tambaqui DAC paired with Makua preamp. They’re both tremendous pieces but as Peter Lyngdorf argues, the most important source in the chain is the room itself and they do indeed make the “room perfect.”
….

@KrellFan1 - is there any wisdom you can share?

 

[tmallin]

Yes, Room Perfect, at least as implemented in the TDAI-3400, can make a huge positive difference in the subjective and measured sound quality of a system in your room. This was true for my Watkins Generation 4 speakers in my audio room.

On the other hand, if the speakers are inherently well balanced (in my book, warm/full and extended low end with a slight roll off in the top two octaves) and you have placed your speakers and listening postion in ways that work with, rather than against your listening room's room modes, the subjective changes made by Room Perfect may be minor, as is the case with my AR-303a speakers in both my Blue Room AV system and my main audio room.

The 3400 is a more traditional two-channel audio-oriented component. Designed a few years back, it offers both analog inputs (including phono if you add the High-End Audio module) and digital inputs. And if you can live within its power "limitations" (200 wpc 8 ohms, 400 wpc 4 ohms) it does away with the traditional DAC since the amplifier section is actually a power DAC. With the more recent 8400 and the Lyngdorf processors, the analog outputs go through a traditional DAC so that an analog output can feed your amplifiers. Of course, with multi-channel music or a surround A/V system, these are necessary "compromises."

 

[tmallin]

More on the new Qobuz Connect functionality of the Lyngdorf TDAI-3400:

Qobuz Connect, like traditional Qobuz, is the only streaming software of which I'm aware which offers an easy route to discovering new recordings from any given label. Thus, if you like the "house sound" of a particular audiophile (or not so much) label--Reference Recordings, Telarc, Sheffield, Proprius, Dorian, Decca, Claves, etc.--you can find all Qobuz offerings from that label easy enough. Once you know they exist, you can of course easily sample these other recordings on the favorite label and add these recordings to your Library or Favorites, if you like.

Other services, like Roon, also offer a Label search, but they frequently return incorrect results and are limited to recordings on that label which are already in your library or favorites. That kind of defeats the purpose of using a Label search to discover new recordings with the house sound you like. Qobuz and now Qobuz Connect can spit out a list of all Qobuz recordings on a particular label whether they currently are in your library or not.

One way to do this in Qobuz Connect is to go to your Library tab. At the top of the display you should see a row of filter buttons. If you don't see "Label" as one of these buttons, click on "Edit filters" and make sure "Label" is check marked as one of your filters.

Then click on the Label button and you will see a list of all the Labels represented in your library. You can arrange these labels a few ways; I like Alphabetical. Click on any of the represented Label buttons. Then click on "Go to label page." This will show you a list of recordings in Qobuz from that label. Click on "See all" to make sure the system shows you all the recordings in Qobuz which are on that label.

Another way to do a Label search in Qobuz Connect is to go to the credits for any album you are playing. There usually is a Label listed under the credits for the album or track. Click the link for that label. Then go to "Releases" and "See all."

 

[tmallin]

As a reminder, for discussion of how I recommend applying Room Perfect in a room where listening is done by a single person from the centered sweet spot, see post #3 in this thread.

 

[tmallin]

For those of you looking to take streaming via the Lyngdorf TDAI-3400 to new heights of listening pleasure, please see my thread about the Network Acoustics Tempus Ethernet Switch, Muon Pro Ethernet Filter, and Muon Pro streaming cables. As I conclude there:

"Yes, the cost is high. These devices together cost about the same as the Lyngdorf TDAI-3400 which I use in both my Audio Room and Blue Room systems. But the increased realism resulting from this cleaning up of the source cannot, in my experience, be had in any other way."

 

[KrellFan1]

Great thread. I am a Lyngdorf owner also.

I would highly recommend upgrading the blue jeans Ethernet cable into the Lyngdorf. That makes a massive difference in my system.

I use Chord Company cables, anything from their Shawline level and up will be a massive improvement.

BTW: I used Sarum Ethernet for my Apple TV and Music Ethernet for me Lyngdorf.

Wednesday I implemented 2 of the most significant upgrades to my MP-60. I installed a Cerious Tech Lumniscate AES EBU cable out from my K22 to AES In on my Lyngdorf. WOW. I then installed a Lumi Power Cord and double wow. There is magic in those Lumniscate power cords.Cannot recommend highly enough. Not cheap, but a value compared to those 3 times the price that don’t sound hace as good.

 

[DBT AUDIO]

Having now listened more to Qobuz Connect and compared the same material with Qobuz via Roon, here are some additional thoughts.

I will go out on a limb and say that at this point, in my system, Qobuz Connect sounds a bit clearer but a bit less warm than the same material via Roon. The sonic differences are quite small, but I think they are there. Qobuz via Roon playing the same material as Tidal via Roon has always sounded just a bit clearer but brighter than Tidal via Roon. Qobuz Connect eliminates any excess brightness. Spatially, I really don't hear much difference at this point between Qobuz Connect and Qobuz via Roon.

Qobuz Connect seems to drain the battery of my iPad controller faster than any other method of listening. This is not a problem, but it is quite noticable.

Qobuz Connect does not display playing times with the same detail as other methods of playback. Playing time for a disc is not show. Playing time for individual tracks is not shown. Once a track is playing, elapsed time for that track and time remaining are displayed. That may or may not bother you, but this is a real difference in the metadata displayed. Perhaps this will be fixed in a future update.

I have not found a way to delete or clear the cue for selected Qobuz Connect tracks. Maybe it's there, but I have not located such a control. Such controls are present in regular Qobuz, Roon, and JPlay.

I came to the same conclusion that you did concerning Qobuz Connect sounding a bit more clearer than Qobuz via Roon. I like some tracks better on Qobuz Connect and some tracks sound better via Roon. A poster on Roon’s forums asked for members to share their thoughts on the sound quality of Qobuz Connect vs. Roon. I shared my thoughts and many challenged my listening impressions. Many advised that both Qobuz Connect and Roon were playing bit perfect files, so they should sound the exact same on my system. I was advised that there may be a protocol and integration problems with my gear that’s causing the slight difference in sound quality. The forum turned into a mess. Lol….

Thanks for sharing!

 

[audioholic_one]

I've been enjoying my TDAI-3400, Radiant 6.2's, and dual Buchardt S10's for the last couple of months. Surprisingly close to my previous my set up at a fraction of the price. However, it does not have the same level of depth, width and detail as my previous system. I'm curious to find out if this post by a Lyngdorf dealer indicates a possibly upgrade or new model to replace the TDAI-3400.

Post #9,174 https://www.avforums.com/threads/new-lyngdorf-tdai-1120-streaming-amp.2274082/page-367#post-32951610

"I've been in touch with my contact at Lyngdorf who says that the TDAI-2210 is built on a brand new platform with much stronger DSP and main processor power. This new platform leaves plenty of headroom for future updates and new functionality, and represents a significant update compared to the TDAI-1120 and TDAI-3400.

It will be interesting to see what this new platform, processor power, future updates and refinements bring to the TDAI-2210 in time.

Really looking forward to getting it on demo."

 

[tmallin]

The sonics of most any piece of digital electronics respond favorably to reducing the load on its power supply. A large color screen (such as what will be in the new Lyngdorf TDAI- 2210) will add a lot of load on the power supply and the DSP processing requirements. The smaller monochrome screen of the 3400 which displays minimal information is much less power and DSP intensive, especially when you let it time out after 10 seconds.

I personally have no interest in streamers which incorporate large color screens since I find it distracting to look at a screen while the music is playing. Hopefully the new TDAI-2210 will continue to allow this screen to time out after a few seconds. If you want a nice screen, an iPad Pro held in your lap displaying the screens of the native source you are listening to (such as Roon, Qobuz Connect, or various sources via AirPlay) is a much higher definition, more color accurate, and much more information rich screen with instant GUI touch controls. There is literally no comparison in usefulness of such a hand-held screen and a screen on an audio box in your unreachable equipment rack. Just be sure to put the iPad on the floor beside your chair once you get down to serious listening to your chosen program since sound reflecting off the glass and metal of the iPad held in your lap can seriously affect imaging and staging.

Other functions which can reduce the power supply and DSP load on the 3400 and which I have subjectively determined to improve sound quality include:

1. turn off ICC
2. turn off volume leveling
3. turn standby level to Deep Sleep
4. reduce screen brightness level to the lowest you need to see it clearly in daylight, in my case 40%
5. use the Lyngdorf remote control wand in infrared mode rather than Bluetooth mode and turn off the 3400's Bluetooth function
6. use the Lyngdorf remote control wand for all functions it can handle rather than the Lyngdorf app or other apps on your iPad/iPhone controller and turn off iPad/iPhone/iWatch when possible
7. disable all unused inputs

Also, see the vibration isolation, electrical, and internet filtering (use filtered ethernet, not Wi-Fi) recommendations in my signature. As with other streamers, all these are important to achieving best sound quality from the Lyngdorf TDAI-3400

 

[tmallin]

Continuing with the topic of unintended sonic degradation caused by the loading of the power supply by various DSP functions, obviously Room Perfect and the Voicings, two of the primary reasons to use the Lyngdorf TDAI-3400, will load the power supply and use DSP resources.

And yes, I can always hear at least the tiniest of sonic degradation when electronic equalization is in the signal path compared to removing it from the signal path. With some equalizers, this difference is less subtle than with others. Sure, it is difficult to separate the frequency response differences intentionally injected by the equalizer from unintended sonic consequences, but it is possible with practice and experience to hear such differences. And this applies even when the equalizer is in the signal path but not intentionally applying any equalization at all.

But I would never recommend that any buyer of the 3400 eschew using these features. There are four reasons for this.

First, and most important, frequency response is THE primary criterion by which we subjectively judge audio reproduction quality. Getting the frequency response to sound nearly correct is hugely important in our judgment of reproduced sound quality. Electronic equalization is the most effective way to take control of the frequency response of a given set of speakers in a given room and thus the most effective way to nudge the sound of your system toward your sonic goals.

I have used a wide variety of analog and digital electronic equalizers in my decades in this audio hobby. Many of these are discussed in this thread. To those I would add the dbX VENU 360 which is part of the Sanders 10e hybrid electrostatic speakers I owned, the DSP equalization built into the Dutch & Dutch 8c (Ascend and REW), the Schiit Loki Max, and the Muse DSP which is part of Roon. I cannot think of any electronic equalizer I've used or demoed that does not provide a substantially greater improvement in sound quality than any negative unintended sonic detriment it introduces. Thus using electronic EQ can almost always provide a net sonic improvement.

Second, of all the equalization units or methods I've used, the Lyngdorf Room Perfect and Voicings, if not at the top alone as the very best in terms of lack of unintended sonic consequences, are at least tied with the best of the bunch in this respect. In other words, using Room Perfect and the Voicings introduces the absolute minimum in unintended sonic detriment of all the electronic equalization methods I've used. Only a few were close or perhaps equal in this respect: the Rives PARC, Z-Systems rdp-1/rdq-1, DSPeaker X4, Audient ASP231, and the Dutch & Dutch 8c's equalization, are the only ones I can think of which approached or equaled the transparency of the processing in the Lyngdorf.

Third, the electronic EQ available via the Lyngdorf is extremely useful and can do what you need it to do both in terms of foundation EQ of your room and in terms of correcting on the fly for frequency response differences among recordings. It is unsurpassed in this functionality by any of the other electronic equalization systems I've used.

And fourth, the electronic equalization of the 3400 is not only maximally useful, it is also maximally easy to set up and use. I cannot think of a system where the equalization is easier to set up in the first place and then actually use. Many equalizers are royal pains to set up initially and if adjustable at all have no easy way to exactly recall or duplicate prior settings. Both Room Perfect and the Voicings are as close to perfect in these respects as any electronic equalizer I have worked with.