Lyngdorf TDAI-3400


Well, after reading all the rave reviews of the Lyngdorf TDAI-2170 both here and other places, I decided to order a TDAI-3400 for myself.  I must admit I am still skeptical that such a diminutive piece of equipment can sound better than the Primaluna Dialogue Premium HP tube amp weighing more than 50 lbs, but I have been so intrigued by everything I have read I simply had to pull the trigger. 
I just unboxed it today, hooked everything up, and am listening to it for a while before setting up Room Perfect. 
I really want to hear the what the amp sounds like as-is for a bit to understand it better. 
First impressions:  Without Room Perfect it sounds like very nice solid state amps I've owned in the past, but to be honest, I don't find the sound to be particularly moving.  I moved to tubes after years of solid state, and I swore I would never go back.  That is where I'm coming from.  I should also add that I always try to keep an open mind.  While my initial take on it might sound like I don't like it, I hope folks just read this as me being as honest as possible about what I hear.  I know the tendency when buying new gear is to want so badly to love it in order to justify the expense that it's easy to fool oneself into believing it's an improvement over what you had before, even when it's not.  Of course I really want it to be as mind blowing as it has been built up in my mind to be, but if it's not I am OK with simply moving back to what I have liked so far.   
I have only been playing records through it so far.  Analog makes up 98% of my listening so that's where I am starting with it.  I have a nice CD transport that I will connect to it in the next day or so just to hear the DAC in the unit.  I will also experiment with playing files from USB sticks, computer audio from my MacBook Pro, and whatever else I decide.  I am not prepared to purchase a music server just yet, but it's something I have thought about for a while.  
My system:  speakers are Harbeth Monitor 40.1's.  Turntable is an SME 20/2 with SME IV.iv tonearm and Kiseki Purple Heart cartridge, fed to a Parasound JC-3+ phono preamp.  Power conditioner is Audioqest Niagara 7000.  CD transport is a Wadia 8.  
I will report back as I have more time to experiment and let the amp break in.  

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Showing 14 responses by jcarcopo

Greetings, I ordered my TDAI-3400 on Labor Day from Sound Science.  Neal was super professional and expediant getting my order place immediately for me directly with Lyngdorf as soon as I got off the phone with him.  I was told to expect the unit in 5-10 business days, but he was able to get it quick shipped out ups express, and I'll have it by Friday! I can't recommend Neal at Sound Science enough! 

Contrast that to my experience with HIFI Heaven, who's owner was curt, rude, unavailable, and unresponsive. So I cancelled my order with them.

I'm very excited to hear this piece in my system and report back my impressions!
@essrand congrats on the tdai-3400. Sorry for the delay, I forgot to follow this thread. Yes Neal is a good guy.  Since buying my unit, I've referred 2 people to him already that have made Lyngdorf purchases as well.

I'm very happy with my TDAI-3400. It's a very smooth, neutral, and natural sounding presentation (maybe with even a slight touch of warmth).  It's a tad less forward and polite sounding than my Benchmark DAC2 HGC/Nord NCORE Class D Monoblock combination, but I feel it's a more accurate portrayal of the music. It posesses excellent detail retrieval, isn't analytical at all, and is non-fatiging to listen to for hours at a time.  Very musical indeed!

The Room Perfect did indeed improve the sound quality by evening out the bass response aswell lifting some congestion and obfuscation in the midrange region

Prior to getting Lyngdorf I typically listened to my Art Audio Diavolo SET tube amplifier primarily and it's also currently connected to the preamp output of the Lyngdorf and to a Luxman AS-55 amplifier switcher so I can enjoy tubes when I'm in the mood or directly to the Lyngdorf's internal Class D amplifier when I'm in a different mood or simply want a change of pace. A best of both worlds approach, if you will, however I may very well end using my tube amplifier less and less since the Lyngdorf is quite good on it's own merits, but it's nice to have options and it's a very versatile piece allowing me to create separate Room Perfect profiles for both amps, which is very handy. 

I really love using the RoonReady and Spotify Connect feature which works adeptly. It was all very easy to setup and configure through the well thought out web interface and I love the Lyngdorf Remote mobile app and even the ability to control the tdai-3400 volume from within Roon's or Spotify's mobile app as well.  Very thoughtfully engineered and nicely executed. Well done! 
@evolvist If you mean network streaming for RoonReady, Roon will convert the dsd to pcm if need be, but that being said the DSD section is missing in RoonReady under device setup, so it may only support flac files. I don’t have any dsd files or I would test it. The DSD menu is available over USB to the Lyngdorf which does allow for selecting between DSD OVER PCM V1 (DOP) and converting DSD TO PCM, but this doesn’t prove it supports it, only that it might. The only other streaming functionality is Spotify so that’s irrelevant. If you meant connecting a hard drive of music to it, I simplt don’t know. Sorry I can’t be more helpful. I would call Neal at Sound Science or contact Lyngdorf directly to find out the limitations of the supported file formats for the network streaming function.
@gallus It’s direct dac-amp why would expect it not to convert the analog to pwm digital? Why do you think there’s something inherently wrong with this? You can by an ADC for $25 that will work to convert vinyl or a AM/FM tuner to digital and feed it to a DAC to run source direct from said DAC, competantly. You can spend $1000-$2500 to do the same thing with a professional studio level grade device. Surely the quality of the ADC in the $7200 Lyngdorf loaded with the superior analog input stage would be far superior to a cheap spdif converter ADC. In the Lyngdorf the analog signal is simply converted to a PWM signal to be directly converted to amplified sound which is actually a very pure pathway imho because the signal is converted to analog in the amplifier and not in a conventional DAC, per se. People have posted excellent results with vinyl and other analog signals fed through the tdai-2170 and tdai-3400, and are happy with the results. A recording engineer friend once stated to me that a person couldn’t even tell the difference between an analog signal converted to digital and back to analog and back to digital and back to analog over 10 times and even at this point they wouldn’t notice an audible difference in A/B/X testing. This "digital is evil" notion is dated and played out to death. I respect your opinion of course, but disagree with it and that’s okay. I just think you’re ruling out an excellent sounding product out of hand.
@charles1dad I originally was dealing with the dealer, but he encouraged me to reach out to Lyngdorf. Lyngdorf was responsive initially, but totally unresponsive after telling me they would get back to me through their engineering department. I submitted a 2nd ticket today with Lyngdorf. I also contacted Neal at sound science to let him know where I was at. I hope something will actually happen to rectify the situation. I’m so tired of this clipping sound when I know with certainty that at least 2 people with Encores and the TDAI-3400 aren’t having this issue. It’s very frustrating and I fear I’m damaging my speakers. I know room perfect is causing it, I just need to know how to fix it. I tried 3 sets of measurements so far and ultimately the problem occurs on heavy bass transients regardless.
@shkong78 It definitely has its moments of competing with a SET amplifier. Ultimately it will never best a SET amplifier, but I do have to say it comes very close, but it doesn't mimic the 2nd or 3rd harmonic distortions that a SET can produce in spades which are part of the reason one wants a tube amplifier, that and the lack of crossover distortion which both amp topologies seems to posess.  I'm sure I'll get my Lyngdorf issue resolved eventually, but I'm a tad irritated with why its taking so long to get it addressed.  Maybe they are too busy with sales as the TDAI-3400 has been an extremely hot selling item for Lyngdorf. 
@charles1dad I hope to get some response from Lyngdorf very soon. Hopefully they will swap units, but I fear the Lyngdorf is boosting certain frequencies which is causing the clipping problem.  If that is the case I'll need to reposition the speakers and hope to fix the issue with placement even though its well nigh perfect in my room atm.  I will say when it's playing properly and not clipping its amazing sounding at higher volume levels.  
@shadorne I hear ya loud and clear. I fear this is the issue, which really sucks.

@almarg Yes, and I hear you too. Again, this really sucks!

=-)
@waltersalas I'm just having 1st world problems.  I'm certain this can be rectified.  I will remove my whining post. It's not helpful. 
@almarg Thanks for the help.  I already have the limiter engaged. Lyngdorf finally got back to me, apparently my issue ticket was left on the wrong desk.  They want me to upload a copy of the backup settings to drop box and let them analyze it to see what's going on. There's is a dip around 100hz based on a prior manual room correction measurement using REW. It was being corrected through Roon though not as aggressively, but the Lyngdorf can add up to 10db of gain to compensate.  This should still allow me to turn the unit volume up to 0db, but I'm having issues at -7db so something isn't right.  I'll get the file to Lyngdorf so maybe they can shed some light on what's going on. 
@velomane - you are allowed 2 Roon Perfect Setups so setup the secondary with the output to the XLR ACTIVE in the GUI WEB MENU. No need to do any measurements. Alternatively, you could also activate the XLR preamp output on Room Perfect profile 1 and just switch it to bypass mode. Whichever you choose or think is more simple. Turning Roomperfect off via bypass while XLR Preamp mode is enabled or creating a 2ndary RoomPerfect Profile with no measurements and also with the XLR Preamp outputs enabled. In this instance you would switch between Roomperfect profile 1 or 2 and have bypass engaged even though it’s sort of moot since you would not have stored any mic measurements anyway for that headphone profile. Hope this helps you out.

As far as output level you are allowed variable or fixed output gain settings and also gain compensation settings. Since you wish to use the headphone amp's volume control set it to fixed on the Lyngdorf. 
@velomane No there’s no risk in hurting anything as -12db is lower in gain than -10db. There are also gain compensations per input, per profile, should you which to compensate, but -2db is pretty negligible so I would just simply increase the volume gain on your headphone amp to compensate if I were you.
@ron1264 I hide in an adjoining bathroom, though I doubt this really necessary. 😂