I bought a brand new set of K240 MK II for this review. I received no accommodation, deal or special discount. I've been exposed to this model for over 45+ years and wanted an opportunity to carefully review them here on H.o.T. As always, it's my own opinion about these headphones, this time, in 2025. Should you buy them?
High on Technology
Music, Sound, and Recording Stuff
Sunday, September 21, 2025
Friday, September 19, 2025
WHAT DOES THE TERM "SOUNDSTAGE" MEAN IN HEADPHONE REVIEWS?
REVIEW AUDIO-TECHNICA ATH-M50X STEREO HEADPHONES: Almost Classics?
Thursday, September 18, 2025
REVIEW BEYERDYNAMIC DT 770 PRO STEREO HEADPHONES: Still Studio Favorites?
Wednesday, September 17, 2025
REVIEW SONY MDR-7506 STEREO HEADPHONES: Still Awesome After All These Years?
Slipping on the Sony MDR-7506 feels like greeting an old friend. Since 1991, these closed-back headphones have been heroes in studios worldwide, delivering no-nonsense sound that’s reliable. Are they still worthy of your consideration?
Tuesday, September 16, 2025
REVIEW SENNHEISER HD 650 STEREO HEADPHONES: Don’t Do What I Did
REVIEW SENNHEISER HD 600 STEREO HEADPHONES: Sonic Truth Revealed for a Price
Monday, September 15, 2025
WHAT IS FLAT FREQUENCY RESPONSE: The Key to Accurate Audio
Sunday, September 14, 2025
BEHRINGER SYNTHESIZERS and EFFECTS BY HP: Eurorack Horizontal Pitch (width)
Monday, September 8, 2025
REVIEW BEHRINGER 69 VIBE PEDAL: Is this the best Uni-vibe clone EVER?
Saturday, September 6, 2025
REVIEW MOOER PE100: Tiny Powerful Guitar Processor that easily fits in your shirt pocket
Friday, September 5, 2025
REVIEW ELECTRO-HARMONIX LIZARD QUEEN: What happened to this pedal?
REVIEW JOYO ORTHROS: UNIQUE A-B Guitar Pedal Effect Switcher
In Greek mythology, Orthros is a two-headed, serpent-tailed dog that guarded the cattle of the monster Geryon. Here, in the real world, where we actually live, Orthros is a deluxe A-B switching pedal from Joyo. The mythological Orthros, with its two heads, might symbolize the dual signal paths (A and B loops) the pedal manages, allowing you to switch or blend between two effects chains or signal routes. The pedal is really inexpensive and has many killer features, is it good?
Thursday, September 4, 2025
A TRIBUTE TO JIM MARSHALL: The Father of the 4x12 Speaker
Wednesday, September 3, 2025
THE JOHN HARDY COMPANY: Replacing Jensen Transformers with in-house built models
PRESS RELEASE FROM "THE JOHN HARDY COMPANY"
I am pleased to announce that The John Hardy Company is now manufacturing the model 16C mic input transformer and 11C line output transformer. These transformers are now being used in the M-1, M-2 and Jensen Twin Servo 990 Mic Preamps of The John Hardy Company. The 16C and 11C replace the Jensen JT-16-B and JT-11-BM transformers respectively. The 16C and 11C are built to the exact specifications of the Jensen models.
Sunday, August 31, 2025
REVIEW SHURE MVX2U XLR TO USB ADAPTER: Do not buy for Apple MAC Processor
Saturday, August 30, 2025
A TRIBUTE TO DEANE JENSEN: Visionary Genius behind Jensen Transformers
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Young Deane Jensen |
Back in the late 1970’s, if you called the Jensen Transformers business phone number, there was a good chance the man himself, Deane Jensen, would answer the phone. He did not identify himself, it was just a business-like “Jensen Transformers”. And I’d say, “I’m calling about a 21-xyz” and he’d launch into the features, advantages and benefits, no waiting, no looking in a catalog, instant knowledge, right there. He was brilliant for some products he developed but one aspect that is always overlooked; Deane Jensen was a genius marketing guy. If he got your ear, the things he said MADE you want Jensen Transformers. He was always enlightening and educational in the dozen or so times I got to talk with him. So here is my tribute to the man who made the very best low-distortion, precision audio transformers.
Friday, August 29, 2025
WHAT IS AN INDUCTOR EQ? Vintage Technology for Modern Sound
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Can you spot the inductors? |
Monday, August 25, 2025
A TRIBUTE TO ASPEN PITTMAN: Soulful Innovator of Groove Tubes
Sunday, August 24, 2025
REVIEW AUDIO-TECHNICA ATH-M50xSTS: A Pro Headphone and Microphone Combination?
Wednesday, August 20, 2025
REVIEW BEHRINGER PRO VS mini SYNTHESIZER: Compact Powerful Puzzle Box
Tuesday, August 19, 2025
B-E-A-D BASS TUNING: Delivers 5-string low tone with 4-string convenience
This post is really meant to highlight an older article here on High on Technology. It's for bass players using 4-string basses who are curious about that EXTRA LOW TONE ability of a 5-string.
Wednesday, August 13, 2025
SPOTLIGHT ON MUSIC: Making “The Storm”, Ambient Music Exploration
Saturday, August 2, 2025
REVIEW GFORCE SOFTWARE OBERHEIM OB-E: Virtual Synth Tom Oberheim Endorses
Monday, July 28, 2025
HOW TO RACK MOUNT GEAR: Without a rack
Do you have rack-mounted gear you move in and out of your recording, control room area? I’m constantly working with literally, piles of gear. I have a lot of little wood blocks which I use to provide air space for cooling between stacks of gadgets. I have a lot of equipment racks in a variety of sizes but the problem with racks is all the space they take up. What if there was a way to have many of the benefits of a rack, without the rack?
Thursday, July 24, 2025
REVIEW 76-KT COMPRESSOR LIMITER: Another look, Is It Good?
Tuesday, July 22, 2025
RIP OZZY OSBORNE, Passing of a legend, age 76
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OZZIE in 2010 |
It is shocking to report that Ozzy has left us. Today he departed the living.
July 5th 2025 was the final Black Sabbath concert, thankfully he was alive to play it.
We last saw him perform back in 2013 in LA. His voice blew out after about five songs but he soldiered on and completed the show. It was an amazing concert. He was an incredible performer.
Good bye Iron Man.
Tuesday, July 15, 2025
FROM SEM TO CEM: The Rise and Fall and Rise Again of Oberheim
VCO: Discrete or chip-based, which is better? Does it matter? When I bought my Sequential Prophet-6 it was touted as great because it had VCO’s constructed from discrete components (like the original Prophet-5 synthesizer keyboards). Oberheim’s first synthesizer, the Synthesizer Expander Module (SEM) also was famously made from discrete components. Oberheim managed to take the original discrete SEM and make it into a polyphonic synthesizer, albeit a very expensive instrument (original four and eight voice synthesizers used multiple SEM modules).
In a parallel universe Dave Smith was innovating with the original Sequential Prophet-5 (five voice). Both of these great synth designers started by using discrete component designs and both migrated to using chips by Doug Curtis, creator of the famed 3340 VCO, on a chip, known simply as CEM. These chip based synths were the ones that were most popular by sales volume, playability and tuning-stability. The debate continues on today about which of these build schemes produces better sound. I think the most important thing is the music you make with any of these instruments but I still find their stories to be almost as fascinating as the instruments themselves.
REVIEW: EMF Meter Model RD630, because health matters!
Monday, July 14, 2025
RIP Rick Derringer: Mr Rock And Roll Hoochi Koo
Rick Derringer quietly left us on May 26, 2025. I saw him performing at the King Center a few years ago, he was still tearing up the guitar finger board. During that show he played the Edgar Winter classic "Frankenstein" completely on the guitar, including ALL the synthesizer parts. Music stardom has taken so many at young ages, he was only 77 years old. You rock on forever Rick!
Friday, July 11, 2025
REVIEW BEHRINGER 2-XM SYNTHESIZER: Compact Powerhouse with Vintage Soul
Thursday, July 10, 2025
MANLEY LABS ACQUIRED
Manley Labs, makers of iconic tube gear like the Massive Passive and one of the most expensive Variable Mu tube compressors, has been acquired in what is described as an all-cash transaction, by entrepreneur and industry veteran Dirk Ulrich, who is best known for iZotope.
Wednesday, July 9, 2025
REVIEW SONICAKE JUNCTION BOX: Balanced Patchbay in a guitar pedal, many apps
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Junction Box, by Sonicake |
While preparing the review of the Sonicake “Levitate” delay/reverb I came across this little jewel, appropriately named “Junction Box”. This is very similar to a box I’ve been building for years in my workshop and which I use regularly in my studio. It’s nice to find it already built but it's not exactly dirt cheap for a dumb metal box of jacks, is it good?
Tuesday, July 8, 2025
REVIEW BEHRINGER MODEL D SYNTHESIZER: Do you remember?
Saturday, July 5, 2025
REVIEW SEQUENTIAL PROPHET-6 SYNTHESIZER: A Modern Analog Classic
Wednesday, July 2, 2025
A TRIBUTE TO DAVID BLACKMER: Visionary behind DBX, Earthworks and Audio Innovations
In the world of professional audio, few names resonate with the same reverence as David Blackmer (he's the DB in DBX). An engineer, inventor, and relentless pursuer of sonic excellence, Blackmer’s contributions have left an indelible mark on music production and recording. From founding DBX to pioneering groundbreaking technologies like the Blackmer Gain Cell, DBX noise reduction, and iconic compressor/limiter hardware, his legacy continues to shape the sound of modern music. This tribute celebrates Blackmer’s remarkable career, his innovative creations, and the enduring impact of his work.
Tuesday, July 1, 2025
TRIBUTE TO DAVE SMITH: Synth Pioneer Who Shaped Modern Music
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Dave Smith |
Saturday, June 28, 2025
WHAT IS A HUMBUCKING GUITAR PICKUP?
Friday, June 27, 2025
REVIEW LEXICON PCM 41 DIGITAL DELAY: A Vintage Gem That Still Echoes in 2025
LEXICON HISTORY: The Rise, Reign and Legacy of a Digital Audio Legend
In the world of music production, few names carry the weight of Lexicon. Synonymous with lush, immersive reverbs and groundbreaking digital delays, Lexicon defined the sound of countless records, studios, and live performances. From its humble beginnings in 1971 to its acquisition by Harman International and eventual place under Samsung’s umbrella, Lexicon’s journey is one of innovation, influence, and enduring impact. Let’s explore the rise, the greatness, and the evolution of this audio titan, with a special nod to its iconic signal processors of the 1980s and 90's.
Thursday, June 26, 2025
REVIEW: THE OBERHEIM MATRIX-6 (& 6R): The Unsung Hero of 1980’s Synth Pop
REVIEW: THE OBERHEIM MATRIX-1000: 1980’s Synthesizer Power House
Monday, June 23, 2025
REVIEW: Jim Marshall’s JCM2000 TSL100: The Misunderstood Masterpiece of Tube Tone
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Jim Marshall |
Saturday, June 21, 2025
REVIEW SONICAKE LEVITATE: Bargain Digital Delay/Echo and Reverb in a guitar pedal
Friday, June 20, 2025
REVIEW MXR X100 ROCKMAN REISSUE, IN A GUITAR PEDAL: Does it Rock?
Wednesday, June 18, 2025
REVIEW AUDIOSCAPE OPTO COMPRESSOR: A hand-built, modern tribute to the LA-2A
For vintage gear enthusiasts, the Teletronix LA-2A optical limiter remains a studio legend, and its magic lies in a quirky component: the electroluminescent panel inside the T4 optical attenuator. This glowing heart of the LA-2A isn’t your typical light bulb—it’s a retro luminescent panel that pulses with the audio signal’s intensity. As the input signal surges, the panel lights up, casting its glow on a cadmium-sulfide photocell, which adjusts resistance to smoothly tame the signal’s gain. This interplay delivers the LA-2A’s iconic warm, musical compression, beloved on vocals and beyond. It’s a shining example of 1960s tech still stealing the show in modern mixes and it’s so important that AudioScape MAKES THEIR OWN!
Tuesday, June 17, 2025
TRIBUTE TO RUPERT NEVE: Father of the modern mixing console
Rupert Neve and the Rise of Neve Electronics: A Sonic Revolution (1961–1975)
In the annals of audio engineering, few names resonate as profoundly as Rupert Neve. A visionary British-American engineer, Neve’s innovations in analog recording equipment transformed the music industry, setting standards that remain revered decades later. From humble beginnings in his garage to building a global enterprise, Neve’s journey with Neve Electronics from 1961 to its sale in 1975 is a story of ingenuity, perseverance, and an unrelenting pursuit of sonic excellence.
Thursday, June 12, 2025
REVIEW EURORACK PATCH-CABLE ADAPTOR: 1/8th to 1/4", unlocks effects pedals
RIP BRIAN WILSON: Creator of The Beach Boys
A musical innovator has left us, Brian Wilson has passed away. The leader of "The Beach Boys" and a recording innovator -- there is no other way to describe him -- he and his brothers delivered a unique spirit and sound. My earliest recollection of the group was around 1964 when my older brother's band was rehearsing in the basement, they were attempting to do Beach Boys tunes and intermittently playing the records for reference.
Wednesday, June 11, 2025
RIP BEYERDYNAMIC SOLD! Classic German Microphone Company cashes out
I have had a longterm, ongoing affair with Beyer microphone and headphone products, from the old handheld ribbon vocal mic designs to the classic M88, and even a wild fling with an MC740 back in 1987-88, all the way to their ultra-comfortable headphones. It is with a deep and profound feeling of sadness that I'm reporting that BeyerDynamic, has been sold to a Chinese holding company for 122-million Euros. With so much history and I.P. this sale price seems mighty low.
Tuesday, June 10, 2025
REVIEW BEHRINGER TORO SYNTHESIZER: The Beast of Bass Returns
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Requires 70 HP Eurorack mounting space |
REVIEW BEHRINGER SOLINA STRING ENSEMBLE: Classic String Machine Rebirth
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Requires 70 HP Eurorack mounting space |
Monday, June 9, 2025
REVIEW BEHRINGER PRO-1 SYNTHESIZER: Desktop, Eurorack and Rack-mount Marvel?
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Requires 70 HP Eurorack mounting space |