Very impressed so far, the little Rel has no problem integrating into the sound stage and after a few minutes tweaking with the levels all is very pleasant. With the T-Zero, I ended up with a noticeable but controlled increase in perceived low bass, which made high volume playback of tracks with substantial low frequency output somewhat more exciting than with the speakers alone, but the sub was unable to offer a huge amount of extra low frequency extension – after all, it isn’t capable of going down to sub-bass levels. Just donate $5 or $10 to our PressPatron account by clicking on the button below. Power Output: 100 Watts (RMS) Phase Switch: Yes, 0 or 180 degrees. The compact REL looked well out of its depth alongside the tall Theophany floorstanders and I assumed it’d have trouble being effective in the more or less 7m x 6m room (with the speakers firing down the 6m length). find a blog page that provides all of the information i Lower Frequency Response: 38 Hz at -6 dB in room. In a word – impressive. There’s method to this seeming madness, according to REL: “The purpose of connecting to the speaker output terminals is one of the unique secrets of REL’s success. for some time, and it seems to have taken a long time to you down the road, and will take a look right here first of all the very next time FRF-Messungen (Frequency Response Function/Übertragungsfunktion) Die gebräuchlichste Übertragungsfunktionsmessung ist die FRF (Frequency Response Function). for any real, even impulse-response .Thus, the frequency response is a real, even function of .A real frequency response has phase zero when it is positive, and phase when it is negative. 'Y‹Ö­á¯°Y'÷θ©Êï焺`™“fcj õ¡MÁ]ViÛXé„wI�>ø¼}ëâ[øº„/Ëbr[Şõ±èIØûè[-ÎZ�­H¬qy†Oñóò+|[.ÏŒ9Cjí(UıL»ßê‚Úg{™ÆœœÑç{¼•ı´jíE"�ËãU+pµ ùaã? Franco would no doubt argue that even the biggest speakers still need to be rolled off because their low bass is probably a distortion-laden nightmare, but at that point, you’d need a much bigger sub. ‰³- endstream endobj 50 0 obj <> endobj 51 0 obj <>stream Frequency response functions are complex functions, with real and imaginary components. The frequency response of continuous-time systems gives another view, just as it did for discrete-time systems in Chapter 6. REL T-Zero. 4.9. I use "the" in scare quotes since, of course, there are often multiple cycles in time series data. So I cranked up the crossover and level knobs only to be greeted by a profoundly overblown low bass, even with the speakers now being rolled off at the bottom. That’s not really subwoofer territory according to most people, especially the aforementioned Mr Viganoni, who reckons a sub needs to be able to get to 20Hz at -3dB. Learn how your comment data is processed. It’s finished in nine coats of hand rubbed black (or white) piano gloss lacquer, further polished on a rouging wheel using jewellery buffing compound and then hand polishing using micro fiber cloth and automotive waxes. The volume is set at about half, and the crossover is around 45. always thought the bottom end lacked some punch although the mid and highs are very sweet. The compact form factor obviously means that the huge drivers usually associated with subwoofers just aren’t feasible, so REL has implemented a single 6.5-inch (165mm) long-throw downward firing driver housed in a sealed cabinet and driven by 100 watts of Class D amplification. ¼!oÀ[òüJ~�\²N‰:eNÎÁ�ìÀBğùüF�µåZ‹µ¶ à’\‚-Ù‚Yߢ¾e}‹ú–Y,²Xf±Èb™Å"‹e‹,–�Y²8:888:888:888:888%+˜}úº5yY˜Q�QX_P_X_P_X_P_X_P_˜Q�QØKĞK˜W�WØWĞWØW–¾œ¹`æÂ9æ œƒ`Âw*x§Â™f¢œ‰b&J…¿Ò_á¯ôWø+ışJ…¿Ò_á¯ôWø+ışJ…¿Ò_á_¡o‘åx¦*Èx¦2ú®éOøøï_9¶AÜ­æk�µ×âöZ¶ô²¯°£úÁíúiœL\…_òO€ h\ük endstream endobj 52 0 obj <> endobj 53 0 obj <>stream € 399,00. zum Angebot Fernsehservice Horvath Infos AGB. – Frequency-response tests are, in general, simple and can be made accurately by readily-available equipment, e.g., dynamic signal analyzer. Presented with the opportunity to review one of the T-Series units, I jumped at the chance because I’m the proud owner of a five box amplification system that’s expressly been designed to work in a 2.1 layout. It added to the bass without creating any major in-room boom and it once again smoothed out the bass response of the room, which was a very worthwhile side-effect. If you start out with something like G(s) = (s +ω n), then factor as G(s) = ω n * s ω n +1 +. With the speakers running on their own, the listening position has to be very carefully chosen so as not to fall into a null, with a resulting decline in bass weight. Your email address will not be published. We utilized 5 full coats of lacquer, and solid aluminium feet and badging because REL owners understand quality must extend throughout a product, not just in the most obvious locations. Like other T-Series woofers, the T-Zero uses a custom-made woofer, a REL designed 6.5" Ultra-Long Throw, mated to a wicked fast Class D amplifier delivering a potent and ultra-green 100 Watts. Quite the opposite in fact, but this cut-off main speaker implementation isn’t how most users will run a sub, so the REL was set up with the main speakers getting a full range signal. So REL products are engineered for integration into stereo systems. If … 36 Bewertungen Lieferzeit 2-7 Werktage . Tel: +44 (0)1656 768777 The ability to fit in with rolled off speaker environments or smaller speakers – which is its natural habitat – and to be able to delicately augment a set of bigger floorstanders, is due to the T-Zero’s ability to provide just enough bass for the job at hand, without getting carried away. Finish: Black or White Lacquer. – Correlation between frequency and transient responses is indirect, except for 2nd-order systems. With the REL in place, there was a more even front-to-back distribution of bass. REL’s T-Zero is a very nicely priced subwoofer that’ll fit in with many environments, both in terms of looks and its audible contributions. Frequency-response methods can be used to supplement root locus: ... For a zero on the real axis, (LHP or RHP), the standard Bode form is G(s) = * s ω n ±1 +, which ensures unity dc-gain. I start looking forward to browsing even more websites written by REL’s subwoofer isn’t for the big boomers, but will subtly augment the sound of systems in smaller rooms, writes Ashley Kramer. The Rel T Zero is small, discrete, and beautiful. What I know is that damping is generally just a multiplication coefficient in frequency response type of analysis and thus sometimes it is difficult to simulate real damping which is a time domain phenomenon into a frequency response simulation. Sorry, your blog cannot share posts by email. REL supplies a 10m length of cable, terminated at one end with a Neutrik connector to plug into the sub, and with bare wire at the other end to connect to the amplifier’s left and right channel speaker terminals. This site's original content is copyright © Crusty Old Gits Ltd and witchdoctor.co.nz. REL is a British company that’s dedicated to making subwoofers, but not just any subwoofers. The quads have bass ports which are supposed to take them down to 48 hz or so but the woofers themselves roll off at 80hz. This paragraph will assist the internet visitors for creating new weblog or even a blog from start to H‰\“Ën£@E÷|E/“EÄ«»*HÈ’c'’“Dã™ÀĞö �µñÂ? end. Lower Frequency Response: 38 Hz at -6 dB in room. Okay, so this is its pseudo-period, pseudo-frequency, pseudo-circular frequency, but that's hopeless. A frequency response function can be formed from either measured data or analytical functions. Having heard how good this set up can sound, it seemed the logical approach, and in this case, I used the cut inputs on the power amps to feed them a rolled off signal and ran  RCA interconnects into the sub – combined with an adapter into its low level input. The REL T-Zero, the baby of the company's subwoofer range, measures way less than a cubic foot and weighs just 6.8kg, but packs a 16.5cm down-firing long-throw driver powered by a 100W class D amp – the first time such and amp has been used in a REL sub. Running it with the power amps providing roll off and pass-through duties, the effects were much the same, only more dramatic as far as hazy audio recollection leads me to believe – there certainly seems to be something in Audio Pro’s ACE-Bass (Amplifier-Controlled Euphonic Bass) technology. There are three other T models, running up to the T-9 with its twin 10-inch drivers, much bigger cabinet and a 300 watt amp, and there are more serious ranges above that, so REL will provide buyers with as much bass as needed – but bear in mind that the T-Zero’s low cost and compactness mean that it’s ideal for users who want to run two or more subwoofers to tame bass-awkward rooms. The midrange benefits vanished as expected, but what was surprising was just how easy it was to get the REL to integrate with the system. freqz returns the complex frequency response in vector h, and the actual frequency points in vector w in rad/s. freqz can accept other parameters, such as a sampling frequency or a vector of arbitrary frequency points. REL T-ZERO Subwoofer . In fact, my own floorstanders will go comfortably lower than 38 Hz at -6dB, but the REL figures are definitely conservative as we’ll see, and in any event, there’s much more to bass than how deep it goes. They’re totally accepted and even loved in the home theatre environment, but somewhat scorned in stereo environments by much of the audiophile community. Required fields are marked *. At 216 x 241 x 260 mm (W x H x D) including the feet, the T-Zero doesn’t exactly strike one as the kind of unit you’d use to get down low, but it certainly impresses from a looks perspective. without breaking the bank, a REL T-Zero V2 (or preferably, two) can’t be beaten. This simply tells us the maximum amount of boost or cut at any point between the given frequencies, so doesn’t really reveal anything about how a product will sound. REL T-Zero (Farbe: High Gloss White), 6.5" Mikro Aktivsubwoofer Stück (Art# HD-008333) Preis vom: 22.05.2020, 12:40:42 (Preis kann jetzt höher sein!) The cleaner midrange and better overall bass quality came as no surprise, because I’ve indulged in this experiment before. Input Connectors: High-Level Neutrik Speakon, Low-Level single phono, LFE phono. The price means that it’s possible and tempting to run a pair of them because two is almost always better than one when it comes to subs. This presented an immediate problem because my power amps are also Neutrik terminated (and totally unprotected against any kind of short circuit), so there was no way I was going to try to cram the REL’s speaker cables alongside the Nordost cables in my own Neutrik connectors. Fully Electronic with SET-SAFE And its diminutive scale allows it to all-but-hide among the … Schutzsystem. Finish: Black or White Lacquer. A REL is designed to augment the performance of “full range” speaker systems in order to provide, in certain cases, linear response below 12 Hz. T ZERO Sub-Bass System Many or most loudspeakers emphasize the mid-bass. My question is about the 'overlap' between the quads and the REL. Just bought two of these to match my B&W 685 s2. Frequency Response Chapter 9 dealt with time-domain response of continuous-time systems. Amplifier: 100W Class D. Dimensions (WxHxD): 216 x 241 x 260 mm. However, in some situations when there are two or more … In the real world, you’ll often see frequency response specifications quote a range of frequencies, such as 20 Hz – 20 kHz, followed by the amount of variation in the frequency response quoted in decibels, such as +/- 6 dB. ’…Å_î“ #Hǘ$¶š ÕŒÛrÇÆâ¿€S| %!æÈ. REL’s T-Zero is a very nicely priced subwoofer that’ll fit in with many environments, both in terms of looks and its audible contributions. T-ZERO: RRP: 749.00 : Specs: Main Specifications: - Type: Sealed, down-firing active woofer - Drive Unit: 6.5in., 165mm long-throw, steel chassis - Lower Frequency Response: 38 Hz at -6 dB in room - Input Connectors: High-Level Neutrik Speakon, Low-Level single phono, LFE phono - Input Impedance: High-Level: 150k, Low Level: 10k, .1/LFE: 10k ohms The T-Zero was left in-situ for a fairly long review period and at no stage did I feel it had provided any detrimental effects to the audio performance of my hi-hi system. Ähnlich wie die FFT-Analyse ist FRF typisch für ein System, welches eine von einem bekannten Eingangssignal gemessene Rückmeldung hat. Taking it seriously now, I moved it to the recommended corner placement, judiciously adjusted the crossover and levels by ear while listening to a number of bass orientated recordings from the likes of Massive Attack and Smashing Pumpkins. When it comes to hooking up the T-Zero, users will find that REL takes a different approach to many subwoofer manufacturers. The example below finds the 256-point frequency response for a 12th-order Chebyshev Type I filter. To obtain an estimated frequency response, the block simultaneously: Bass extension didn’t seem to be dramatically deeper than that produced by the speakers when they’re running full-range, even with the promised 9dB of acoustic amplification delivered by the corner loading – the laws of physics can only be helped along to a certain limited degree. That’s due to design and size, but of course its limited extension means that you wouldn’t use it to add bass to a set of speakers that reach way down low already. REL T-Zero << Previous Next >> Click to enlarge : Details . The cabinet is described as being “super stiff” and designed to drive up the resonant frequency to allow the damping of the “instrument-grade bracing” to be more effective. For those who’re worried about their amp needing to drive the sub and the speakers, the user manual says: “This connection can be made without affecting the performance of the amplifier because the REL’s amplifier input impedance is 150,000 ohms, in effect not producing any additional demand whatsoever on the rest of your system. Of stand mounted LS50s and a Naim amp … ve indulged in this,.: 216 ×241 ×260 mm subwoofer into a stereo System can be Made accurately by equipment! Visitors for creating new weblog or even a blog from start to end and a Naim amp … very... 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