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Shure SRH1840

MSRP $624.00
Stock Status: 1 to 2 Weeks.
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The SRH1840 is the top Shure open-back headphone and has a majestic "big" sense of musical detail and beautifully controlled low-end response transitioning into an extended, lilting tone in the mids and highs. Bass response is throaty but in no way remotely boomy or overdone and the overall presentation is definitely more laid-back versus its less expensive SRH1440 brethren. The soundstage also appears more uncrowded and airily imaged, so the nice space around the notes makes for a great 'open' listening experience. Seems like the pro audio brains at Shure have brought their monitoring precision to open-back cans with the SRH1840!

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Product Features:

  • Warm, smoothly focused tone but with accurate musical detail to the hilt
  • 100% open-back earcup construction adds to 'airy' image presentation
  • Detachable, easily replaceable headphone cord
  • Great long wearing comfort with very lightweight full-size ergonomics
  • Free 2-year Shure manufacturer's warranty

What's In The Box:

  • (1) Extra headphone 'Y' cable - 8ft length
  • (2) Extra velour earpad cushion replacements
  • Shure protective padded travel / storage case
  • Shure owner's manual


Opinions about the Shure SRH1840 headphones can lean towards one of two differing schools of thought: either audiophiles will think these to be amongst the best-detailed, most neutral open-back headphones available under $700 or they will conclude the pricing to be on the steep side of the dreaded 'diminishing returns' curve. After all, there are many classic headphones to be found at a less expensive 'under-$500' tier that might be said to compete with the SRH1840. So what did Shure audio engineers bring to the table in the SRH1840 that's not heard in the Sennheiser HD650 or the AKG K701, for example? In two words: "indoor weather." For listeners seeking immersive engagement with their music, the Shure SRH1840 creates its own personal universe of sound with a broad, simple soundstage presentation and exploded musical detail that reveals hidden parts lurking unheard in your favorite recordings. Midranges stay in clear relief at all frequencies and the upper treble ranges soar and sing with critical accuracy. The drawbacks to our HeadRoom ears are it's a rather ruthless, unforgiving presentation not well-suited for compressed digital recordings since the SRH1840 tone is penetratingly precise and even slightly prickly at times. But feed the SRH1840 from an LP turntable source + headphone amp and you'll hear vast definition and a clear, unblunted musical space that sounds excellent with most genres and styles. Bass response is audibly fuller and better extended than the lower-tier Shure SRH1440 edition but still remains extremely controlled without much sub-stratic mass, so hip-hop, reggae and electronic music people may wish to add low-end EQ depending on tastes. For producers and audio professionals performing final soundtrack or mastering edits, the Shure SRH1840's faithfulness comes as a revelation of fresh insight into your work. Low sensitivity specs favors using the Shure SRH1840 with headphone amps for maximized acoustic definition, improved dynamics and clearest possible transparency.

The Shure SRH1840 headphone comes in a modern metal-flake grey/black color and has a totally open-back circumaural ["around the ear"] earcup construction that will completely cover the earlobes on most wearers. As with all open-back cans, the design provides no isolation or noise-blocking ability and will also "leak" audio out of the headphones as well, so the SRH1840 are not recommended in situations where listening privacy is needed or for close-mic recording work wher you may be trying to avoid mic bleed. Two detachable headphone cords allow easy replacement if ever needed, a great thing to extend product lifespan and durability. The quality OFC headphone cabling attaches in a 'Y-type' design with discrete 'snap-in' connections into the left / right earcups. A extra cable is provided in the SRH1840 box along with an extra set of earpad cushions -- a nice plus from Shure. By the way, the packaging / shipping box is HUGE on these, so don't be suprised at the gigantic box when you see the package on your doorstep! And, of course, with your HeadRoom 'authorized dealer' purchase receipt, the free 2-year Shure manufacturer's warranty is serviced at no charge through Shure Audio's Chicago facility in case of any eventuality.


  • Headphone Type: Full Size
  • Connector Type: 1/8
  • Weight: 268 grams w/o cable
  • Impedance @ 1kHz: 65 Ohms
  • Detachable Cable: Yes
  • Cord Type: Straight Y
  • Cord Length: 2.1 meters
  • Coupler Size: Large
  • Ear Coupler Type: Full-Size
  • Driver Type: Dynamic
  • Acoustic Seal: Open
  • Manufacturer Warranty: 2 Years
  • Sensitivity: 96 dB

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Reviews At A Glance
1 Reviews

Average Rating 
(Showing 1 of 1 review)

Shure SRH-1840 Headphone Review by Dale (updated 9/17/2012)
Posted by dale from Akron Ohio on 2012-02-10

Recommend Product: Yes
Pros: Comfortable, Stylish, Great sound
Cons: Pricy

The first thing people want to know about a new headphone is "How does it sound?" In the case of the SRH-1840 the verdict is: Excellent. The second question people ask is "Is it worth the cost?" That determination is purely subjective of course, and takes into account things other than the sound. My verdict: Yes, with no reservations. I'll get to the details of that sound after first describing the 1840's physical characteristics.

The SRH-1840 has a proprietary double-entry detachable cable that's about seven feet long and straight (not coiled), terminated by a standard straight (not angled) miniplug. A 1/4 inch (6.35mm) adapter is supplied and screws onto the miniplug. I can't be certain whether the miniplug would fit into any of the recessed sockets on music players that have such things, but the threaded portion of the plug ahead of the business end is 7mm in diameter including the threads. The cord is made up of two side-by-side strands that are bonded together, where each strand is 3mm thick, and those two strands separate at a strain-relief and join the earcups 'Y'-style.

Many people feel that single-entry headphone cables are a better choice because they're more convenient, i.e. they don't get tangled as much as double-entry cables. The price for that convenience is potentially worse sound due partly to the fact that the total cable length going to each driver is different, and partly to the requirement for a thin cable running across the headband to get the signal to the second earcup. Fortunately, the SRH-1840 matches my personal preference.

The SRH-1840 comes with two identical cables, the 6.5mm adapter, an extra set of velour earpads, and a semi-hard carrycase that affords good protection when transporting the headphone.

Since the 1840's cable has a standard miniplug with optional 6.5mm adapter, one might assume that Shure intended that it could be used with portable music players. Since laptop and desktop computers also have miniplug jacks, and because the 1840 is less efficient than most of the headphones that are typically used with portable music players, I'm going to assume that the intent for the miniplug is to be used primarily with computers. I did try a few relatively low-volume tracks with the iPod Touch alone, and while those were barely adequate for playback indoors where it's fairly quiet, they would not be adequate for playback on-the-go. If you do require that kind of playback with the 1840, you will probably need to increase the volume of at least some of your music tracks.

The earpads are fully circumaural and plush velour, with openings that measure approximately 1-5/8 by 2-1/2 inches. The inside of the cups have cloth-covered thin spongy pads so the ears don't contact anything that would cause discomfort. The earcups appear to be some type of high-grade plastic, with a headband of metal alloy that provides good flexibility, light clamping force, and (since the 1840 is so light), good stability with no tendency to shift when I move my head around.

The headband has small spongy pads underneath which feel very comfortable on my head, but if there is any tendency for discomfort in spite of the very light weight of the headphone, I recommend pulling the earcups down just slightly more than the minimum, to let most of the weight be borne by the earcups and not the headband. Note that the earcups of the SRH-1840 do not rotate in any direction, although there is a small amount of movement back and forth to allow alignment of the earcups to different sized heads.

The SRH-1840 is a snazzy-looking headphone if you've seen photos of it, so it has a modest bling factor that you don't have to pay a premium for. I would rate its appearance as 8.5 out of 10 and I would rate its comfort factor equally high. The reason the appearance doesn't get a 9 or better is because the 1840 isn't a fashion headphone, so my subjective rating of 8.5 is probably as good as you can get for a serious hi-fi product like this. The reason I didn't rate the comfort 9 or higher is because the 1840 is a full-size headphone with moderate clamping pressure to keep it stable on your head. Having said that, I've never had a full-size headphone that felt this comfortable - the next best thing to no headphone at all.

I'd like to describe the sound of the 1840 in terms of a predecessor - the Shure SRH-940 - partly because they are family-related, partly because I have both, and partly because it will be a less complex task given certain similarities.

The SRH-1840's general signature is best described as: Bass slightly less than the 940, upper treble very similar to the 940, midrange similar to the 940 except where the 940 has a slight emphasis around 500 hz, the 1840 has a slight emphasis about an octave higher. I tend to regard the 1840 as bass-neutral in spite of having less impact than the 940, and for those users who prefer more bass than what the 940 provides, they will have a similar impression of the 1840 - not for bass-heads. The 1840's midrange is essentially flawless with great rendition of voices and instruments, and given the overall smoothness from the top of the treble to the bottom of the bass, as good a listening experience as I've ever had.

The standout area for the 1840 is what I call the "presence" area - that part of the lower treble that makes voices and some instruments sound more (or less) "alive". This would be in the area from 4 to 6 khz I think, and whatever the exact specifics, the 1840 has the best reproduction I've heard from any headphone. Where some of the more expensive headphones from various manufacturers have been criticized for being too bright in this range, I believe the 1840 is the perfect answer. I feel like I can listen for hours on end with no letup, hearing the inner details of music tracks I've played many times before, but haven't enjoyed nearly as much.

Being an open-back design, the SRH-1840 has almost no isolation. The soundstage is slightly better than the 940's, which might surprise some users who aren't aware of the 940's above-average soundstage for a closed-back design. Listening to the 1840 I never get a sense of constriction, compression or any other such quality - the sound is always airy and effortless. Sibilants seem less bothersome with the 1840 than most other premium headphones I've used, and there is another important aspect of the 1840's sound that merits special mention: The quality of the upper harmonics of instruments and voices is exactly what I would hope for in a premium headphone but don't always get.

For this review I mostly used a Dell desktop with premium soundcard playing FLAC format tracks in Foobar2000. Some of those tracks, notably certain recordings by David Chesky, sound so amazingly good with the SRH-1840 that I'm often startled by their realism and clarity. Some tracks that I use I don't have FLAC copies of, and those MP3's (320k CBR) sound nearly as good on the iPod Touch connected via the line out dock to an Objective2 "assembled" headphone amp as they do on the desktop computer. A more ideal configuration would be a good DAC running from the desktop or laptop USB, feeding into a decent headphone amp like the Objective2 or better, but given the spectacular sound I'm getting already I have no doubts about the ultimate quality of the SRH-1840 headphone.

Now that I've covered the basics of the sound, it's time to describe how the SRH-1840 sounds with a variety of music that's available on CD's or as high-quality downloads from Internet music stores. I've used the following examples in other reviews, so these will serve as good test tracks for this review and the results can also be compared to the results noted in the other reviews.

Bauhaus - Bela Lugosi's Dead (~1980): Strong midrange sound effects - this is a good worst-case test for resonant-type sounds in the most sensitive midrange area. Handled very well by the SRH-1840.

Beethoven Symphony 9, Solti/CSO (1972): Excellent overall sound and particularly striking how the SRH-1840 reproduces the triangles, bells and other background instruments that are often obscured with other headphones that have limited high frequency response. Of special note for this headphone are the bass impacts beginning around 10:30 of the fourth movement.

Blues Project - Caress Me Baby (1966): Rarely mentioned, but one of the greatest white blues recordings ever. The loud piercing guitar sound at 0:41 into the track is a good test for distortion or other problems. Handled very well here.

Boz Scaggs - Lowdown (1976): Good sound quality - this is a great test for any nasality in the midrange. Handled very well by the SRH-1840.

Buffalo Springfield - Kind Woman (~1968): A Richie Furay song entirely, rarely mentioned, but one of the best sounding rock ballads ever. This will sound good on most headphones, but it's a special treat with the SRH-1840.

Cat Stevens - Morning Has Broken (early 70's): A near-perfect test for overall sound - this track will separate the best sounding headphones from the lesser quality types. Nothing specific, except that almost any deviation from perfect reproduction will stand out with this track.

Catherine Wheel - Black Metallic (~1991): Goth with industrial overtones - I like this since it's a great music composition and the sound effects are smoothly integrated into the mix. This may sound distorted or mushy with some headphones, but the SRH-1840 renders the deliberate instrumental distortions clearly.

Def Leppard - Bringin' On The Heartbreak (1981): MTV goth/pop/metal at its best - good ambience and high energy - the better headphones will separate the details and make for a good experience. Lesser quality and the details tend to mush together.

J.S. Bach - E. Power Biggs Plays Bach in the Thomaskirche (~1970): Recorded on a tracker organ in East Germany, the tracks on this recording have the authentic baroque sound that Bach composed for, albeit the bellows are operated by motor today. The SRH-1840 plays the tones seamlessly through the upper limits of the organ, which cover nearly the full range of human hearing. Of special note are the pedal notes - tracker organs have low-pressure pipes and don't typically produce the kind of impact around 30-35 hz that modern organs do. A headphone that's lacking in the low bass may sound bass-shy with this type of organ, but the SRH-1840 provides a satisfactory experience.

Jamming With Edward - It Hurts Me Too (1969): Intended originally as a test to fill studio down time and set recording levels etc., this was released a few years later for hardcore Rolling Stones fans. Although not as good technically in every aspect as the Chess studio recordings of 1964, and in spite of the non-serious vocals by Mick Jagger, this rates very high on my list of white blues recordings, and sounds absolutely delicious with the SRH-1840.

Jennifer Warnes - Rock You Gently (1992?): The strong deep bass percussion at the beginning of this track has been cited as a test for weakness or distortion in certain headphones like the SRH-1840. Compared to the v-moda M80 which is noted for a strong lower bass, the M80 has a distinctly richer sound with those notes and a stronger impact. It's tempting to assume that the M80 is better, but the final analysis is in the extended listening. Having played this track many times now, I'm highly impressed with the SRH-1840's bass reproduction and detail throughout the track, and even the beginning notes have a nice clean-sounding thump to them.

Jimmy Smith - Basin Street Blues (early 60's): This track has some loud crescendos of brass and other instruments that don't sound clean and musical on some headphones. The SRH-1840 provides excellent reproduction. Listen particularly to the second crescendo at 15 seconds in, for maximum detail effect.

Ladytron - Destroy Everything You Touch (~2009): Featured in The September Issue, this song has heavy overdub and will sound a bit muddy on some headphones.

Milt Jackson/Wes Montgomery - Delilah (Take 3) (1962): The vibraphone is heavily dependent on harmonics to sound right, and the SRH-1840 plays it superbly.

Pink Floyd/Dark Side of the Moon - Speak To Me (1973): Strong deep bass impacts will be heard and felt here.

Rolling Stones - Stray Cat Blues (1968): Dirty, gritty blues that very few white artists could match. On some headphones the vocals and guitar lack the edge and fall more-or-less flat. If you're a really good person, playing this song will probably make you feel nervous and uneasy.

Tony Bennett - I Left My Heart In San Francisco (1962): Frank Sinatra's favorite singer. Highest recommendation. With some of the best headphones, the sibilants on this recording are very strong, but they're not bad with the SRH-1840.

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