Due to high initial demand there is currently a 3 week delay on shipping new orders for the LDRx or LRDxB. Your patience will be rewarded with beautiful sound!
Now that we’re back from our idyll at RMAF, we’ll be redoubling our efforts to get caught up with our backorders.

Recent Articles

LDRx/LDRxB right front corner view with control knob Tortuga Audio October 2014 Newsletter - LDRx & LDRxB Passive Preamps Now Available  On September 1st we officially released the new LDRx/LDRxB passive preamps to manufacture. The LDRx is a single ended passive preamp with 3 inputs (optional 4th & 5th) and 2 outputs. The LDRxB is a balanced version with 3 XLR inputs, 1 RCA inputs (up converted to balanced […]

Read what audiophiles are saying about our preamps

owner review

Owner Feedback on the LDR3x

“CONGRATULATIONS! The LDRx is quite a revelation with exceptional musical qualities! I must stress that I’ve been using a Vishay bulk foil plus Holco shunt resistors,silver wired stepped attenuator for the last 20 years (Audio Synthesis’ PASSION) and that this unit was highly rated. Indeed, it is a very, very good passive control unit and I’ve been quite satisfied with it. Well, it is quite an achievement that the LDRx does everything better in a clear audible way! The music simply sounds fuller, warmer with more body and detail. Everything sounds more natural as if no electronic gear is being used. No small achievement in a system that combines a digital source, a digital 3 way crossover, solid state amplification and an all dipole loudspeaker arrangement comprising Quad’s ESL63 electrostatics, a pair of Volt bass/mid drivers and a Gradient subwoofer. No nasty boxes at all! Well, what can I say? Thank you, Morten and Merry Christmas!” – Francisco Fragoso
audiophilia.com logo

Audiophilia Review of LDR1

"The LDR1 did not exert itself upon the signal, as far as I could discern. As such, it represents the least colored preamp I have ever heard in my system. It also provided greater resolution than any other preamp in my experience."
DIY Audio logo

Owner Reacts to LDR3x

"I was having a hard time explaining in words what I was hearing, it just felt so clean, natural and timbres to die for, to take what someone else had already said which I thought was yet another propaganda, "Let me state up front that the LDR1 is the most pure, neutral, transparent, noise-free and grain-free component I have ever heard." and he was totally right on the spot. I would also add to this a fluidity in complex passages I had not heard before, it is as if someone had removed a veil in front of me. My friend and I were both totally impressed and trust me, I have tried many gears before."
head-fi.org logo

Owner Re-discovers Music Collection with LDR1

" I listen to a wide variety of music. I pulled out discs that I had not listened to in years and probably listened to more music, since receiving the LDR1, than I had listened to in the past 6 months. I was given a renewed sense of excitement that I had been missing for a long time. I can't think of higher praise.  Low level detail increased to a great degree. Previously obscured detail was laid bare. Each instrument and voice gained, not only an extra dimension in space but, resolution giving a sense of the artists emotional intent. Leading edge attack transients are more delineated throughout the frequency range. This was most noticeable with all types of percussion. Snare, cymbals, toms, and kick had much more snap and precision."
owner review

LDR3 – “Best Purchase Ever Made in Audio”

"Overall, I'm enjoying the Tortuga LDR3 immensely.  It's mating up to the Job 225 seamlessly and I feel it's leaps and bounds better than any TVC I've heard and used in my own setup.  For the first time since I've joined this hobby, I finally feel like I'm listening to real music, and not a reproduction of music.  All curiosity of "should I upgrade this or that" has seemed to disappear and all I'm left with is enjoyment of music in it's truest form.  Thank you so much for what I believe to be my best purchase ever made in audio."  - Steven Zaointz
6moons logo

6moons Review of the LDR6

"The Tortuga Audio preamp equaled or surpassed all basic performance parameters against any contenders I had in house, passive, active, tube, FET and at any price level with regards to faithfulness. That put the Tortuga Audio LDR6 into the position of personal benchmark as my current reference for accuracy. The top competition may offer equal or superior performance but that's for the future to reveal. For now the LDR6 is my top dog." "If one looks at the results and factors in the price differences, the Tortuga comes off as a powerful little piece which more than vindicates Mr. Sissener’s claims about the virtues of passives in general and the LDR6 in specific. It offered an uncluttered yet exceptionally detailed and dynamic presentation that was fundamentally honest to the signal ahead of it." "The performance of the little Tortuga reopens the passive vs. active debate." "Music through the LDR6 is an ephemeral experience. It dances with fire for a brief shining moment and disappears, leaving you wanting more."
head-fi.org logo

Owner “I have an LDR1 and it is fabulous.”

I have an LDR-1 and it is fabulous. Best preamp I ever owned at any price. When I bought it I thought I would get super transparent sound at the cost of thinning things out. Usually, that is the price for transparency. I took the risk anyway. I was dead wrong. The transparency is indeed the best I ever heard - but it is so full sounding - I can't believe my ears. Now, warm and full are not the same. It is not warm. It is truthful to the recording. Regardless, it is that fullness and weight and supreme smoothness without sounding bloated and without giving up one iota of detail which makes this a world class product. I doubt things could get more than 5% better at any price- even $100,000. The LDR1 is the most perfect preamp I could ever imagine.
AudioCircle.com Logo

Reviewer REALLY liked the LDR1 Passive Preamp!

"I like my tube preamp. I liked the S&B TVC that I auditioned a few years back. I REALLY like Morten's LDR1. Characteristics I found with the LDR1 can be summarized as follows: > natural full bass with good transients and heft > excellent midrange balance > improvement of a narrow band midrange ring that my speakers suffer from > clean with good transparency. Possibly a bit less transparency than I have heard before with my system, but I've never experienced so balanced a midrange in my system before which may affect that perception. > consistently great sense of tonal color, with good saturation. > highly listenable, even allowing me to listen into and appreciate music that I often find strident (even with the tubes, Chicago and Otis Redding recordings for instance). Possibly there is some softening of the edges of notes? I don't know, but it certainly was no negative for me. > a real sense of flow and a lack of sibilance and high frequency hash that brought back some memories of how things sounded with my old Phillips and B&O turntables. I did not expect this but it was great. In summary, the LDR1 is highly recommended."
Tortuga Audio Passive Preamp recommended by HiFiPig.com

HiFi Pig Reviews the LDR6

"There is just a sense of absolutely everything having been stripped free of fuzz and imprecision. Instrumental placement isn’t approximate or inferred. Instead, instruments are precisely located at a fixed and exact distance from the others with the space between performers and the characteristics of the recording environment jaw-droppingly obvious." "... the LDR6 produces a sound completely free of colouration, with a soundstage that was just consistently deeper and better resolved than with any other passive pre-amp I have ever used." "...suitably matched, sonically, the LDR6 is an absolute gem. Jaw-droppingly transparent, with faultless microprocessor control, this pre-amp provides a level of transparency usually the domain of hair shirt enthusiasts, with the convenience of remote control."
AudioCircle.com Logo

Owner Commentary on the LDR3x

"Today I received the LDR3x board and I am FLOORED by the sound quality. I've been using a TVC [transformer volume control] for several years and was very happy, but the LDR simply blows it away. I am hearing detail I never knew existed in recordings I have listened to hundreds of time before. Bass is better, treble is clearer, etc….the sound is killer. I am retired and have been pursuing this hobby seriously for 40 years. The last 20 years of my career was as a music wholesale salesperson – I worked for Telarc for 7 years and then for an indie distributor where I sold several audiophile labels, so I have some serious experience listening. This volume control is fabulous."