MartinLogan Dynamo 1500X Subwoofer Review

Most people who are into high performance audio and audio equipment are familiar with the name MartinLogan. The company has been producing speakers for about 30 years and originally was primarily known for their range of large floor standing electrostatic speakers. However the brand has diversified quite a bit over the years to produce headphones, center channel and surround speakers and powered subwoofers. When I was asked to review MartinLogan’s Dynamo 1500X, the largest most powerful model in their Dynamo lineup, I visited the MartinLogan website to do a bit of reading up on it prior to receiving the review unit and was surprised to discover that they have no less than 8 subwoofer models in their current product range. As previously mentioned the Dynamo 1500X sits at the top of the Dynamo line but it falls in the upper middle of the entire MartinLogan subwoofer lineup as far as price and performance are concerned. Over the years I have had a few opportunities to hear various models of MartinLogan’s electrostatic speakers but this would be my first hands on encounter with one of their subwoofer offerings.

The Dynamo 1500X arrived in a moderate sized, heavy gauge, single layer cardboard box with the typical description and company logos on the sides. Weighing in at probably 60lbs and being a little more compact than expected the 1500X boxed up was rather lighter and more manageable to move than I am used to for a 15” subwoofer. Opening the box showed that the subwoofer and grille are both inside of bags and held by large shaped foam inserts at the top and bottom of the box. Other than the grill and the 1500X subwoofer itself the contents include, a set of spikes, a pair of right angle RCA cable adapters, a right angle power cord and the owner manual which is one of the more thorough and well written I have encountered.  The packaging was more than adequate considering the small stature and light weight of the system. Short of dropping the 1500X off of the back of a moving truck, I see very few situations where it would be damaged in shipping. A MartinLogan Perfect Bass Kit was also supplied and came in its own small box (The PBK system is shared with Paradigm who developed the system originally and it was evaluated as part of the Paradigm Signature Sub 2 review previously. Both Paradigm and MartinLogan are now under the ownership of ShoreView Industries so there is some sharing of R&D, technologies and manufacturing.). The PBK kit costs and additional $100 but includes a nice telescoping tri-pod stand, usb powered measurement microphone, the software cd, usb cables for connecting the microphone to the subwoofer and the operation manual, which again is well written. Out of the various manufacturer auto room equalization systems I have directly had experience with to date, the PBK system has been one of the best performing.

Unpacking the Dynamo 1500X was an easy affair and carrying it into the theater room from my garage was also no big deal thanks to the comparatively svelte exterior dimensions and 52lb mass. In fact I realized just how small it was after getting it into the theater room in the basement and moving a 100lb HSU VTF-15H I had been reviewing out of the way to make way for the 1500X. Despite both using 15” drivers the 1500X is less than half the size of the big HSU and weighs about half of the weight as well. As far as visual presentation goes this is a huge difference with the 1500X being about an order of magnitude less visually intrusive. To date the 1500X is the smallest powered sub housing a 15” driver that I have reviewed by far.

Design Overview

The Dynamo 1500X is a small sealed alignment utilizing a long throw 15” driver and an amplifier rated at 650 watts rms and 1300 watts short term. Other than the previously mentioned PBK system the 1500X does not employ a bunch of bells and whistles that some other subwoofers list as features but which may be of limited usefulness. The controls are simple and straight forward which I find refreshing. One unique feature that it does offer which I found to be rather interesting is an interchangeable foot system which allows the 1500X to be configured as either down firing or forward firing. The four feet are a molded black plastic that are L shaped and have a center screw which locks into the enclosure and a pair of pins which insert into the enclosure similar to how most grilles attach. There are 2 faces of the enclosure which have the mounting points for the feet, the face containing the driver and the amplifier panel. The feet can be screwed or unscrewed simply using a coin. The whole change takes less than 5 minutes. The 1500X comes configured for down firing which places the feet on the driver panel. In forward firing position the driver now fires horizontally and the amplifier is placed on the bottom. This is where all of the right angle connectors provided with the 1500X come into use as they will clear the floor easily. I like this option because there is little chance that your settings could be inadvertently changed since they would be under the subwoofer, however initially I had a concern about heat being trapped and building up in the amplifier, however after giving the 1500X some rather extreme workouts with various signal types the amp barely even got warm to the touch. The right angle connectors also help out with fitting the 1500X into tight places or up against walls. It would be nice if more manufacturers would provide a right angled power cord especially as this usually protrudes the furthest. After switching the feet a few times to see how this procedure worked I ended up leaving the 1500X in the down firing configuration for the rest of the time it was in my possession. The grille, which I test fitted on the subwoofer and then promptly put back in the packaging since I would be leaving the 1500X down firing, is constructed of molded plastic covered with the typical dark black grille fabric. To my eye the grille and plastic feet both failed to exude the same amount of quality as the rest of the subwoofer and components used. The grille felt very fragile and the feet also seemed like they could be broken without much force applied laterally. Now this probably won’t be an issue for most but on carpet you would not want to attempt to slide the 1500X on its feet as they could be seen to flex while doing so and I had visions of one cracking or becoming stuck in the threads. Otherwise the quality of finishing and components supplied with the 1500x was very good. The 1500X’s external dimensions measure just 18.3”x16.75”x17.6” in down firing configuration and 19.3”x16.75”x18” in front firing configuration so it shouldn’t be hard to fit into even tight spaces and won’t draw unneeded attention to itself.

The enclosure is available in only two finishes, the standard satin black finish of the review unit and a piano gloss black finish is available for a $300 upcharge. The standard finish on the review unit was well applied and heavy. I also noted that it seemed fairly durable as the review unit got a number of smudges which I found will wipe right off with a cloth and was also moved around a number of times. During transport to the outdoor test site it even knocked against a large metal ammo case in the back of the SUV due to an abrupt stop that was required and I thought for sure that there would be an ugly mark on the exterior, but once it was wiped with a bit of glass cleaner it left only a tiny little ding the size of a match head that could barely be seen up close. The 1500X is small with an unobtrusive and durable finish and it is well put together too. The 1500X looks good but at the end of the day it is still a basic black cube, so it didn’t exactly inflict me with pangs of longing to own it with its visual presentation.

Removing the 15” driver from the 1500X revealed it to be a well engineered if not massively powerful unit. The frame is a good looking cast aluminum design with under spider venting and with the flange cut into a square pattern. The driver mounts with a total of 12 large Allen head screws and is flush mounted into the baffle. The cone of the driver is a lightweight polypropylene which is suspended by a large rubber half roll surround and what looks like a pair of 6” diameter spiders. The motor is built with a pair of stacked ferrite magnets that are about 6” in diameter and ¾” thick. The top and bottom plates both appear to be about 8mm in thickness and the back plate has a small 0.5” diameter pole vent. The voice coil appears to be 2” diameter. When the driver was removed from the cabinet I noticed that there was a secondary small black wire that led to the drivers frame and went in under the spider landing. It turns out that this is a thermal sensing system which helps monitor and protect the driver from excessive heat buildup in the voice coil. As far as I know this system never came into effect while the 1500X was in my possession and I definitely was not delicate with it at times. Either that or it is very subtle in operation. 

        

MartinLogan Dynamo 1500X Driver

Once the driver was removed from the 1500X I could see that the amplifier was mounted inside of its own metal chassis which covered all of the internal components so I decided not to go to the trouble of removing the amplifier and then removing the covers over the amplifier. MartinLogan indicates that this is a 650 watt highly efficient Class D design and it includes a very basic set of controls with only gain, low pass and phase being user adjustable. The inputs are limited to a pair of RCA inputs and a single balanced XLR line which is nice. A trigger input and the input for the PBK system complete the connection scheme. This is plenty of control and connection options to blend the 1500X into the majority of systems. In use the amplifier certainly seemed to have plenty of power for the driver and even during the ground plane measurement session with pure test signals the amplifier barely got warm to the touch.

 

MartinLogan Dynamo 1500X Amplifier

The cabinet of the Dynamo 1500X appears to be constructed of ¾” medium density fiberboard with the baffle built of slightly thicker material. The roughly cabinet features a cross brace which ties the 4 panels not housing the amplifier or driver together and also is generously lined with thick damping material on both of the sides and top of the cabinet. The result of this is a well damped and dead cabinet with little resonance or panel vibration in the subwoofers range of operation. Both the driver and amplifier are flush mounted and the cabinet features a small 1/4” round over on each edge. The basic satin black finish was evenly and thickly applied and durable. The component quality and construction of the 1500X is very good with the exception of the grille and feet which seem a little flimsy for a subwoofer of this price.

 

MartinLogan Dynamo 1500X Cabinet

MartinLogan Dynamo 1500X Listening Session

The Dynamo 1500X was auditioned in the down firing configuration and was placed in the front right corner of the roughly 3300cubic foot listening room, an XLR cable run from the Onkyo PR-SC886P to the 1500X and the internal low pass filter of the Onkyo set to 90Hz which I know from previous experience usually results in the best match to the CF-4 mains for a single subwoofer placed in the front right corner location. Since the PBK system was also provided with the 1500X I opted to listen to the 1500X for a bit without it first and then run the PBK auto equalization system on it, rematch the levels and listen to the same material again. Without the PBK equalization the 1500X sounded a little hollow and bottom heavy. This is not surprising to me since I have measured the response from this corner of the room many times. This placement delivers generally good response for a single subwoofer but the biggest issue is a large room induced notch centered at 65Hz at the main listening position that mucks up the response. This typically results in the kick drum being sucked out in this range if not filled in a bit with EQ and the result is that the deep bass seems a little heavier than usual. Thankfully most subwoofers have their maximum output capabilities close to 65Hz so headroom after some equalization is not usually an issue. Running the PBK system is not very difficult at all. In short it involves loading the software on your pc, running a few cables and placing the microphone at a couple of listening positions and waiting while the PBK system analyzes the data. It really is quite simple and only takes a few minutes to setup and run. Additionally the instructions provided are quite good as well. After running the PBK system the notch near 65Hz was filled in somewhat and the response overall was much improved with better smoothness at the listening position. The kick drum punch returned to music as did some of the bass line fundamentals which had previously fallen into the notch and gotten smeared or lost. I left the PBK’s settings in effect for the rest of the listening sessions. As I noted in my review of the Paradigm Sub2 the PBK system a very effective and easy to use system that is the best of the auto equalization schemes I have encountered to date. At a cost of $100 it is a steal and highly recommended if your subwoofer is compatible

Music listening Session

Left Lane Cruisers: Junkyard Speedball

Left Lane Cruisers are a pair of back-woods Indiana boys making a whole lot of racket with just vocals, a drum kit, a beat up Stratocaster and the occasional washboard. This is a low fi band and recording with nothing modern or digital about it and the only real bass on the album comes from the kick drum, but it is a round and fat kick drum sound and since it isn’t fighting for space with many other things in the mix it gave a good opportunity to gauge just how much tromp and thump the 1500X was capable of and it turns out that is quite a bit. I listened to most of this album at a rather generous level and the 1500X sounded composed and powerful while hammering away. 

Gojira: L’Enfant Sauvage

I selected this album from French metal band Gojira in order to see how the 1500X would do with highly compressed sampled metal drums and the occasional 30Hz bass drop. It did excellently. The kick was represented with a punch and tightness that was spot on while the bass boom at the big change towards the end of Explosia was rendered with power at a not insubstantial volume level. More atmospheric parts with less busy drum arrangements allowed the fundamentals of the distorted bass lines to come further forward in the mix and the 1500X reproduced these easily.

Blu-Ray Concert: Porcupine Tree: Anesthetize

I often use this disc for speaker and subwoofer reviewing because it is one of the best concert mixes and performances I have in my collection with excellent separation of instruments, ambience, and dynamics. The 1500X again did very well anchoring the bass range and reproducing the complex and sometimes frantic drum and bass guitar arrangements. Again I was impressed with the amount of punch the 1500X was capable of for such a compact unit in a large room and while also easily tracking some nuanced bass lines behind the kick drum to boot even while being asked for quite a bit of output.

Movie listening session

After a really good performance with music I was interested to see how the 1500X would do when presented with the much heavier lifting required to reproduce the LFE channel of modern action movies.

9

This animated movie is one of my favorite low frequency mixes as it has a variety of different effects including events that are very deep bass only, powerful effects down to 10Hz and below, wide bandwidth effects, upper bass effects and plenty of more “typical” 25-40Hz rumbles, thuds and booms. It also offers large dynamic contrasts with the largest most powerful bass events occurring towards the end of the movie rather than the one rumble, everything maximum loudness mixes of some movies. One part that I usually look for to gauge a subwoofers useful extension in 9 is towards the beginning where #9 finds the doctor and there is a gust of wind accompanied by some very low bass centered below 20Hz with very little accompanying sounds higher in frequency. The 1500X hinted at this event at a master playback level of -10 from reference, but did not produce it with the weight it should have and missed most of it. Later when the robot cat attacks 9 in the can the 1500X did a good job of shaking the couch and matching the on screen action with hefty rumbles and thuds.

When the flying creature later attacks the group the 1500X again did a decent job of conveying the bass events but I could sense that some of the deepest bass was a bit muted when the creature was destroyed in the propeller. At the end of the movie when the large cannon is fired and also when the ammunition explodes I could tell that the 1500X was not producing the very lowest portions of the events as well as the upper range of the spectrum and the output peaks seemed compressed somewhat compared to what this track has sounded like previously with much bigger subwoofers. The bridge collapse and death of the machine were much the same. The 1500X put out a hefty amount of rumble and shake but I could tell that it didn’t have the room quaking authority that I have heard with this soundtrack before. That said this is a monster of a soundtrack to ask one small sub to handle in a room this size and one compact subwoofer just cannot faithfully reproduce it in all its glory in reality. So…While the 1500X may not have plumbed the absolute depths or tracked every signal peak to the last 100%, it also did not elicit any concern for its safety or anything that sounded offensive. This is actually a very important and laudable point because subwoofers are often pushed harder than any other speaker in the system and while someone very familiar with a certain soundtrack and room can perhaps tell if the output is a little compressed or the deepest bass isn’t there, those unfamiliar will have no idea that anything is missing. A subwoofer that gets pushed too far and makes some bad noises will alert and distract everyone from the movie. I later watched X Men: First Class with the 1500X with much the same result. The 1500X sailed right through giving a capable performance even if some of the most difficult bass passages may have been limited or reproduced with less power. Again I have to stress that you really can’t expect one compact sub, even a very good one to reproduce everything on some of these movie soundtracks in a good sized room.

MartinLogan Dynamo 1500X Measurements

The MartinLogan Dynamo 1500X was placed outdoors in a large field with the nearest large objects a minimum of 60ft or greater away from it, with the driver facing towards the microphone. The balanced XLR input was used and an ACO Pacific 7012 measurement microphone was placed on the ground at a distance of 2 meters from the nearest enclosure face of the 1500X and pointing towards the driver. The amplifier was set to maximum gain, the phase was set to zero, the low pass filter was set to bypass and no PBK equalization was in effect. All measurements were taken in this configuration unless otherwise specifically noted. For more info on the testing equipment and procedures please see the article here. 

Powered Subwoofer Testing Outline and Procedures Overview

 

MartinLogan Dynamo 1500X: Effect of Low Pass Filter on Response

Above are the frequency response measurements of the 1500X showing how adjustment of the low pass filter affects the top end response. The roll off slope is 24dB/octave and the -3dB point agreed well with the indicated setting on the dial.

 

MartinLogan Dynamo 1500X: Basic Frequency Response as Tested

With the low pass filter disabled the 1500X produced its flattest response but the general shape was of a rising response into the deep bass down to 24Hz, a response that is filtered off above 150Hz and the rapid drop off below 20Hz of about 36dB/octave indicates that a 4^th order high pass filter is in effect below 20Hz. Overall the resulting response shape fits within a 6dB total window from 19.5-162Hz which is very close to MartinLogan’s stated response of 20-200Hz +/-3dB but with a bit less upper end extension. The 1500X’s response shape is more like what you would expect to see from a large vented subwoofer with a 20Hz tuning than a small sealed subwoofer. There is a significant amount of processing going on to force the 1500X into this response shape. I must admit that I am not a big fan of equalizing small sealed subs like this.

 

MartinLogan Dynamo 1500X: Group Delay

Group delay measurements for the 1500X indicate that there is some energy delay centered at about 20Hz corresponding with the boost equalization and high pass filtering used. The group delay is well mannered down to 30Hz where it starts to increase until it just barely exceeds 1 cycle of delay from 19-25Hz. Still at such deep frequencies and with the group delay just barely breaking 1 cycle it is doubtful that this is of any audible consequence.

 

MartinLogan Dynamo 1500X: Long Term Power Compression

The long term output compression tests for the 1500X show that it responds in a linear manner to increased output demands up through the 100dB sweep at which point it has reached its maximum output potential near 20Hz reaching an output of about 97dB. As the 1500X is asked for more output it responds by producing what it can without any overtly bad noises. The 1500X was still producing increased output as demanded during the 115dB sweep. Finally during the 120dB the 1500X was completely out of headroom over the full bandwidth but it is notable that despite it being driven so heavily into compression in the deep bass it never sounded like it was in any real danger and behaved in a very stable and repeatable manner. By that point the 1500X was producing over 110dB above 40Hz.

Note on Output Compression Testing: This is by far the most demanding measurement type conducted on the subwoofers during our testing and will reveal any issues with overload, port compression, port noise, driver distress, creaks, rattles, buzzes, etc. Additionally the test is conducted outdoors with just the subwoofer operating so there will be no nearby walls or objects to vibrate and no upper frequency content from other speakers in operation. These would normally help to cover up or mask any objectionable noises from the subwoofer in a typical room. Any sort of audible distress or issues with the subwoofer are readily apparent in this environment.

 

MartinLogan Dynamo 1500X: Output Compression Magnitude

Looking at only the amount of compression occurring in the output of the 1500X It can be seen that it does excellently through the 100dB sweep with virtually no compression. Compression starts to set in centered at 22Hz in the deep bass during the 105dB sweep this is due to the large amount of boost equalization applied to the 1500X to extend the response. However this also means that the 1500X uses up all of its headroom near 18-25Hz very early. Since that is the case the 1500X simply stops getting any louder between 16-30Hz. Thankfully the engineers at MartinLogan correctly matched the amplifier potential to the driver and dialed in their protection circuits very well, so while the 1500X will compress early in the deep bass it will not get damaged or allow the driver to produce gross mechanical noises no matter how hot the signal you send to the inputs. As can be seen even with a nominal 115dB sweep there is only about 2dB of output compression above 45Hz. By the 120dB nominal sweep the 1500X is finally at its maximum output potential across the entire 10-120Hz bandwidth. Judging by the compression shape in the deep bass the internal boost equalization appears to be at least 12dB if not even more, centered at 22Hz! Even at this 100% maximum output level the 1500X was very well behaved and while there was some deep bass distortion audible as warmth or an overtone to the measurement signal, otherwise the cabinet did not rattle or buzz and there was none of the spurious mechanical or other signals from the driver that it was badly overdriven as with many other units. The types of bad overload noises mentioned do not show up obviously in harmonic distortion measurements because they are not noises that are harmonically related to the signal but are actually far more subjectively obvious and offensive to the ear because of this fact. These are things like port chuffing, driver mechanical bottoming, or suspension slapping and rattles or buzzes in the cabinet or grille. The 1500X exhibited none of these. This is a very well protected and bullet proof design.

 

 MartinLogan Dynamo 1500X: Total Harmonic Distortion

 

MartinLogan Dynamo 1500X: Distortion by Component

The distortion results for the 1500X indicate that it behaves well during the 100dB sweep but as previously seen is already being driven to maximum output near 20Hz which shows up as elevated deep bass distortion. Above 35Hz there is less than 5% THD at that drive level. By the 120dB nominal sweep the deep bass is into the limiter, the amp is out of headroom everywhere and the deep bass distortion has grown to over 30% below 25Hz. Still the THD is just reaching 10% above 40Hz while the output is above 110dB. Looking at the harmonic makeup of the distortion captured during maximum output of the 1500X shows that while distortion is not extremely low it is primarily dominated by the 2^nd harmonic over almost the entire range above 23Hz. The 2^nd harmonic is relatively benign subjectively and indeed some listening tests have shown people to prefer a bit of 2^nd harmonic distortion. Again this confirms my impression of the 1500X sounding very composed even when pushed very hard. The third harmonic, indicating large driver excursions usually, becomes highest between 14Hz to 23Hz but drops off dramatically above 30Hz. The 4^th harmonic is under 3% above 19Hz with the 1500X producing its maximum output.

 

MartinLogan Dynamo 1500X: CEA2010 2 Meter Groundplane RMS Results

CEA2010 Results

The CEA2010 maximum distortion limited short term output results for the Dynamo 1500X indicate that it has impressive headroom from 40-100Hz, with peaks of 110-115dB recorded. This is the range where most of the bass in music is centered. This reaffirms my subjective impression of the 1500X of doing especially well with music. In the deep bass the 1500X loses some steam as is to be expected of a small sealed subwoofer…The physics is simply against it having huge deep bass output. However it still produces respectable output by using a capable 15” driver and strong amplifier and manages to dish up 90dB way down at 12.5Hz. It could not quite produce 100dB at 20Hz at 2 meters, topping out at about 98dB with the CEA-2010 burst signal. In room however the typical boost to frequencies below 30Hz will help provide some extra headroom in the deep bass and indeed measurements in my room at the listening position indicated that the 1500X received a nice lift from the room and that distortion was also lowered substantially. Considering the design and overall size of the 1500X these are commendable results.

MartinLogan Dynamo 1500X Conclusion

This was my first hands on experience with a MartinLogan subwoofer and the Dynamo 1500X left me with a good impression of their product line. I especially liked the small size, reasonable weight and uncluttered, basic connection and controls provided with the 1500X. I also like the shape shifting option provided by the switchable feet which I think can be quite useful in some circumstances. I confess that I am not a fan of the actual feet themselves or the grille which both just seem a little out of place on a subwoofer in this price range. The other miss for me was simply the heavily applied internal equalization used, but once properly setup and blended with the mains in room the 1500X provided a strong performance with 2 channel music and concert DVD’s, producing punch and clean note reproduction. The 1500X wasn’t quite as strong with the heavy handed LFE of blockbuster action movies but still did a fine job in a large and difficult room. Despite not being able to pressurize the room with 20Hz effects like some much larger subwoofers the 1500X also never drew any attention to itself with bad noises or ever seemed to be in any trouble no matter what was sent to the input jack. The 1500X is absolutely rock solid in that sense. It does what it can without fuss and doesn’t kill itself attempting to reproduce what it cannot. While not the most visually arresting face on the subwoofer block the 1500X is well finished and constructed with quality components and despite packing a 15” driver it is small enough to fit into and disappear into most spaces. Speaking of small…Small sealed subwoofers seem to be getting more and more popular since few people want to make room for a black cube the size of a refrigerator in their living room but as most people interested in audio now know, the smaller you make your subwoofer the less likely you are to get real deep bass out of it. The Dynamo 1500X seems to be positioned in somewhat of a sweet spot in the market. The 1500X is small enough to fit into even challenging spaces but is still large enough to produce useful deep bass in a bigger space. At $1595 it isn’t what most would consider inexpensive but it is quite reasonable compared to many other offerings sold at brick and mortar establishments and offers the advantages of being able to: Personally go have an audition and look at the product without having to commit to buying it first and also an extended dealer and service network when compared to internet direct offerings. Also consider that the only sealed subwoofers that I have reviewed to this point that have outperformed the 1500X were multiple times the price and also much larger like the FW18.0 and Velodyne DD18+. If you are in the market for a compact subwoofer in this price range I would recommend giving the MartinLogan Dynamo 1500X some consideration. 

MartinLogan Dynamo 1500X Front Firing Configuration

The MartinLogan Dynamo 1500X is a very compact, sealed offering and yet it still manages to meet the required output thresholds to receive the Audioholics Bassaholic Large Room rating. It is one of the smallest subwoofers to be able to do so. The Large room rating indicates that this sub is recommended as maintaining adequate headroom in rooms or spaces of 3,000-5,000 cubic feet and/or for users who usually listen at moderate volume levels with occasional high volume playback. For further information in how we make these recommendations see the full article here.

See: Audioholics Subwoofer Room Size Rating Protocol

MartinLogan Dynamo 1500X Review

MartinLogan

(785)749-0133
MSRP: $1,595

The Score Card

The scoring below is based on each piece of equipment doing the duty it is designed for. The numbers are weighed heavily with respect to the individual cost of each unit, thus giving a rating roughly equal to:

Performance × Price Factor/Value = Rating

Audioholics.com note: The ratings indicated below are based on subjective listening and objective testing of the product in question. The rating scale is based on performance/value ratio. If you notice better performing products in future reviews that have lower numbers in certain areas, be aware that the value factor is most likely the culprit. Other Audioholics reviewers may rate products solely based on performance, and each reviewer has his/her own system for ratings.

Audioholics Rating Scale

• — Excellent
• — Very Good
• — Good
• — Fair
• — Poor

Metric	Rating
Bass Extension
Bass Accuracy
Build Quality
Fit and Finish
Dynamic Range
Performance
Value