Judging from the pictures, these products do look more elegant, well-made and ambitious than the usual hi-fi startup products, but I am still thinking that I have heard a lot of smart and ambitious things like this before: a A complete catalog of home theater-friendly speakers and made in China, which is very common today.
What I want to say is, I really want to know who is behind this, and if possible, there are some fairly detailed technical details about the large floor machine. Put down or shut up.
Soon thereafter, I got what I asked for but didn't expect: a specific and detailed answer to my question.
"Perlisten" is the abbreviation of Perceptual Listening. The company was conceived and formed between 2016 and 2019. They designed and produced the first six products in 2020, and made their global debut in 2021. The main managers are Daniel Roemer and Lars Johansen, both of whom have long resumes, including technical and management positions in major speaker companies.
Secondly, and more importantly to me, Perlisten provides detailed technical and test measurement data that far exceeds the common data in the industry.
Like other companies, Hi-Fi companies always provide poetic decorations and focus on certain physical improvements that are considered marketable. Of course, Perlisten also makes marketing statements-but the company also provides data: graphs of frequency response (on-axis and off-axis), impedance, phase, and distortion, and spectrograms showing off-axis response along the vertical and horizontal axes. Floyd Toole’s work provides a strong justification for such measurements (footnote 1). Today these measurements are usually obtained with Klippel near-field scanners or similar proprietary systems, but few companies publish such measurements on their products. Detailed information. I hope Perlisten's transparency will encourage other companies to provide this information (footnote 2).
Although this transparency does not guarantee a successful dunk, it grabbed my collar and shouted "We are serious!" So I ordered a large floor-standing S7t.
Perlisten S7t When S7t arrives, I am happy to help me set them up-it is definitely not a job for me. Three masked men-Steve Jain of Fidelity Imports, his son Ethan and a friend-quickly assembled and positioned the S7t and received a spectacular ebony gloss finish. The sturdy rectangular box at first glance appears to be five drivers mounted on a thick, carefully carved front panel. On the back is a charming polished brass panel with two pairs of large multi-way terminals equipped with jumper boards. Below is a perforated rectangular metal grille that echoes the side panels; when the S7t is used in its standard bass reflex mode, they serve as vents. The 27.5-pound steel plate attached to the base supports four adjustable legs. Spikes are optional.
When you look closely, you will find that S7t has seven drivers instead of five. Four of them—two on the bottom and two on the top—are 7-inch (180 mm) woofers. Between them is a carefully designed waveguide-an acoustic lens-roughly the same size as a woofer. Its central element is a 28 mm (1.1 ") beryllium dome tweeter. A closer inspection reveals that two other 28 mm domes are embedded on the top and bottom edges of the lens so that their perforated covers maintain the contours of the lens; these domes Made of a "thin layer" of carbon. Perlisten calls this central component a directional mode control (DPC) waveguide. This feature is the core of Perlisten's Signature and Reference speakers-both literally and figuratively.
The carbon dome drivers on these flanks collectively act as midrange drivers; as you might expect, the central beryllium dome is a tweeter — although Perlisten calls it a "full-range tweeter." DPC controls horizontal and vertical diffusion-the role of the latter is to minimize early reflections from the floor and ceiling. The moving mass of the dome midrange driver is much smaller than that of the traditional midrange cone, which should result in better transient response, lower distortion and higher efficiency. (Perlisten specifies that the sensitivity of S7t is 92dB/2.83V/m.)
Although the Perlisten specification sheet refers to S7t as a four-way system, it is by no means a typical four-way system. The top and bottom woofers roll off slowly around 500Hz; the other two (sandwiched between the DPC) roll off about an octave. All three drivers in the DPC start to run around 1.1kHz. The outer carbon dome rolls off at a frequency of approximately 4.4kHz. The central beryllium dome tweeter extends to and beyond the top of the audible frequency band; the specified upper limit of the S7t range is 37kHz, –10dB.
It is obvious to me that what is needed for the transition between the large cone and the dome and the central dome and the side domes is not a classic textbook cross. Roemer confirmed that this is "atypical" and that the "overlap" between drivers is "greater" than people often find. He also said that he doesn’t like to specify the crossover frequency, “because it means [a] the traditional method.” He told me that Perlisten’s method is to “do not consider manipulating the driver Xover to match a set of electrical filter ideals”, that is, fourth-order Butterworth then forces each drive to handle a specific bandwidth. Instead, they want "all of these to work together to achieve design goals" and "create a coherent wavefront." He said that this is "where the speaker imaging comes in" and "how the speaker almost disappears." He suggested that I "play some music with vocals while walking towards the speakers so that your head is about the main axis." He said that I would find it "difficult or even impossible to point out the single transducer that produces the sound."
"This makes X-over quite complicated, but considering the results, it's worth it," he said.
Unusually, Perlisten loudspeakers are designed for sealing or bass reflex (port)-the latter is achieved by inserting the downward launch port. Throughout the audition process, I listened in bass reflex mode. According to the specifications, this mode extended the response to 22Hz (–10dB) and reduced the indoor response to an impressive 16Hz.
Listening Initially, S7t was placed in the location of my Revel Ultima Studio2. My first impression is a full and clean sound, which I find very pleasant. After a while, I realized that the sound field seemed to be squeezed between the speakers, and the imaging was a bit blurry. I enjoy the clarity and very good dynamics of the mid-bass, but in general, this is not what I expected. I removed the speaker grille, but this did not bring any improvement.
My eyes are drawn to the DPC array, which is the source of the tweeter, and its location is significantly lower than the tweeter of most floorstanding speakers. The center tweeter dome is 32 inches from the floor, which is lower than the typical ear height and lower than the ears on my sofa (38 inches). I adjusted the front foot so that the speaker was tilted slightly upward so that the axis of the speaker was aligned with my head, but this did not make a difference. I asked Dan (though I didn't admit what happened). Then he told me in detail with an illustration, "S7t is tilted back by 2°" and "The design reference axis is at a 2° angle (meaning it is much higher in the distance)". Therefore, at my initial listening distance of about 12', the reference axis of the tweeter is at 37¼". My ear is very close to this axis at 38". In fact, at 12', the ±2° window covers an ear height of 32–42"; at 10', the ±2° window ranges from 32" to 40 3/8".
Footnote 1: Toole's book Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms is the third edition. Kal's comment on the first edition of Stereophile can be found here.
Footnote 2: I am sure that one of the reasons Perlisten is so keen on measurement is that S7t's measurement is excellent. —Jim Austin
Log in or sign up to comment. Kal You leaked one of my secrets. rt66indierock was submitted on November 23, 2021-2:33 PM, as long as Paul Seydor's wife Danielle said it sounds unreasonable and like high fidelity. Now I am back to an old question, will it play my reference albums and recordings? Login or register to post comments What is a robot? Submitted by Kal Rubinson on November 23, 2021-2:31 PM What is a robot? Log in or register to post comments and fix typos. rt66indierock Submitted on November 23, 2021-2:39 pm Kippel is an important tool for measuring speakers. It's a pity that Amir is the only commenter who uses it. Log in or register to comment Re: The Klippel NFS Submitted by John Atkinson on November 23, 2021-2:57 PM rt66indierock wrote: [Klippel] is an important tool for measuring speakers. It's a pity that Amir is the only commenter who uses it. Although I personally spent more than US$50,000 on test equipment over the years, Klippel NearField Scannner's US$100,000 is financially unaffordable. :-( There is also the fact that Klippel needs to be used in a space with a ceiling height of 10 feet, which is not feasible in my New York home. However, I don’t think my speakers are under-measured. John Atkinson Technical Editor, Stereophile Log in or register to comment rt66indierock on November 24, 2021-1:04 pm Submit a comment to discuss speaker measurement techniques. I will use Klippel measurements as much as possible. I don’t want to use yours because I want to measure the speakers myself Of course, my reference album and recordings are played in an environment under my control. I recently purchased a new SUV and heard six tracks from my reference album last month. It will be to adjust the audio system to Play their adventures reasonably. Log in or register to comment on Erin's audio corner.. Submitted by remlab on November 23, 2021-3:42 PM Klippel is also used, but for its value, JA measurements can do the job , Except that pt may be used for loudspeaker THD measurement. Log in or register to post a comment. Thank you John Atkinson for submitting remlab on November 24, 2021-11:58 AM and wrote:... In terms of its value, JA measurement is indeed ok Work done, except for possible speaker THD measurements. Thank you. John Atkinson Technical Editor, Stereophile Log in or register to comment. The most experienced speaker surveyor ever (so far). Submitted by remlab on November 24, 2021 -2:12pm vs Klippel is a bit like Garry Kasparov vs Deep Blue. Deep experience vs pure processing power. Everyone obviously has their own strengths and weaknesses. Log in or register to comment on bass power and bass response by dc_bruce on November 2021 24th-Submitted at 7:56 am Although it seems possible for a system of this size to extend the bass to 20 Hz (-3dB), the designer has obviously chosen to abandon this in order to improve efficiency. Given that most home listening environments are at 40 Hz There is a 3 to 6 dB boost in the -50 Hz range, so indoors, this speaker is likely to be "flat" below 40 Hz. According to Kal's report, the result is a lot of bass power (undistorted, uncompressed loudness) ) Achieves the realism that most people want. As suggested by Mr. Austin’s footnote, those who want a 20 Hz extension can always add one or two subwoofers (with the same dynamic capabilities as the main speakers) , In order to hear "hall sounds" and other ULFs. Given that most subwoofers have There is a self-adjusting room correction function, which may produce better sound than a completely passive, uncorrected single "full frequency" system with the same low frequency extension. How far is it from the front wall to log in or register to post a comment? Submitted by BluesDog on November 24, 2021-9:52 AM, competing with your Revel is no small feat. Would you still say that it performs better when transplanted or sealed? Login or register to post comments don't know. Use them only when Kal Rubinson submits on November 24, 2021-10:20 AM. According to the recommendations of the distributor/installer, only use them as a port. In addition, although they believe that a subwoofer in a sealed configuration can fit well, home speakers of this size are most likely to be used in stereo in most systems and are expected to perform well without a subwoofer. Log in or register to post a comment. Thank you, how far is Kal from the front wall. Submitted by BluesDog on November 24, 2021-10:31 AM, thank you, Kal. How far from the front wall do you think it is prudent? Post a comment after logging in or registering? ? ? How to be cautious? Submitted by Kal Rubinson on November 24, 2021-1:58 PM? ? ? How to be cautious? Log in or register to post a comment
As long as Paul Seydor’s wife Danielle says it doesn’t sound like hi-fi, I will put the robot above any critic. Now I am back to an old question, will it play my reference albums and recordings?
Kippel is an important tool for measuring loudspeakers. It's a pity that Amir is the only commenter who uses it.
Although I personally spent more than US$50,000 on test equipment over the years, Klippel NearField Scannner's US$100,000 is financially unaffordable. :-(
There is also the fact that Klippel needs to be used in a space with a ceiling height of 10 feet, which is not feasible in my New York home.
Nevertheless, I don't feel that my speakers are under-measured.
John Atkinson Technical Editor, Stereophile
Discuss the measurement technology of the loudspeaker. If possible, I will use Klippel's measurements. I do not use yours because I want to measure the speakers myself. Of course, play my reference albums and recordings in an environment under my control.
I recently purchased a new SUV and heard six tracks from my reference album last month. Adjusting the audio system to play them properly will be an adventure.
Klippel is also used, but in terms of its value, JA measurements can do the job, except for speaker THD measurements.
John Atkinson Technical Editor, Stereophile
vs Klippel is a bit like Garry Kasparov vs Deep Blue. Deep experience vs pure processing power. Everyone obviously has their own strengths and weaknesses.
Although it seems possible for a system of this size to extend the bass to 20 Hz (-3dB), the designer has clearly chosen to give up this in order to improve efficiency. Given that most home listening environments have a 3 to 6 dB improvement in the 40-50 Hz range, indoors, this speaker is likely to be "flat" to below 40 Hz. According to Kal's report, the result is a large amount of bass power (undistorted, uncompressed loudness) to achieve the realism most people want. As suggested by Mr. Austin's footnote, those who want a 20 Hz extension can always add one or two subwoofers (with the same dynamic capabilities as the main speakers) in order to hear "hall sounds" and other ULFs. Given that most subwoofers have a self-adjusting room correction function, this may produce better sound than the equivalent low-frequency extension of a completely passive, uncorrected single "full-range" system.
Competing with your Revels is no small feat. Would you still say that it performs better when transplanted or sealed?
do not know. According to the recommendations of the distributor/installer, only use them as a port. In addition, although they believe that a subwoofer in a sealed configuration can fit well, home speakers of this size are most likely to be used in stereo in most systems and are expected to perform well without a subwoofer.
Thanks, Carl. How far from the front wall do you think it is prudent?