In due time the British REL literally shocked the market by ultra-compact Quake subwoofer - it was considered before that a true bass machine simply must have big sizes. The rear panel is host to more or less the usual sub controls and inputs – with a low level input plus the LFE and high level speaker input. Lower Frequency Response: 38 Hz at -6 dB in room Connections: High-Level Neutrik Speakon, Low-Level single phono, LFE phono Amplifier: 100W Class D Dimensions (WxHxD): 216 x 241 x 260 mm Weight: 6.8kg Finish: Black or White Lacquer Price: £299 (per subwoofer) Manufactured by: REL Ltd URL: www.rel.net Tel: +44 (0)1656 768777 + The frequency is "the" period at which seasonal cycles repeat. It’s a musical little beast, definitely suited for stereo environments, and in the right system, it’s a pleasure to listen to (I’ve heard more articulate units, albeit at a price point well above the REL’s) but users need to bear its ultimate limitations in mind when deciding to buy – if you want 20Hz flat, then you need a bigger box, end of story. 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. 36 Bewertungen Lieferzeit 2-7 Werktage . Learn how your comment data is processed. Real Imag ω = 50 ⇒ Y X = 0.89∠−27 ... E1.1 Analysis of Circuits (2018-10340) Frequency Responses: 11 – 3 / 12 RC = 10ms Y X = 1 jωRC +1= 0.01j ω 0 0.5 1-0.4-0.2 0 X Y X-Y ω=300 Real Imag ω = 50 ⇒ Y X -1 0. This paragraph will assist the internet visitors for creating new weblog or even a blog from start to The Frequency Response Function for LTI Systems • The output of an LTI system can be … 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. In a word – impressive. By connecting to the high-level input on the REL from the amplifier, you build forward the sonic signature of your main system, including the tonal balance and timing cues of the entire electronics chain. 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). Power Output: 100 Watts (RMS) Phase Switch: Yes, 0 or 180 degrees. Your website has definitely offered me personally with just the facts that I actually required. '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? The gloss surface is gorgeous! TECHNICAL SPECIFICATIONS Type: Sealed, down-firing active woofer Drive Unit: 165mm long-throw, alloy cone, steel chassis Lower Frequency Response: 38 Hz at -6 dB in room Connections: High-Level Neutrik Speakon, Low-Level single phono, LFE phono Amplifier: 100W Class D I guess it should be circular pseudo-frequency, or I don't know how you say that. They may also be represented in terms of magnitude and phase. Of course, there’ll be some combining of output of the two bass systems and this is usually what causes problems when trying to get a sub to work in a system with bigger speakers; it’s much easier with speakers that aren’t quite as bass capable. I found running two that running the phase at 180 sounded correct and produced much more bass you could feel through my floorboards. 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. 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. Um den Frequenzgang eines mechanischen Systems zu messen, muss das … want. Tzero is built using a super stiff cabinet construction that drives the resonant frequency higher so it is more easily damped by our instrument-grade bracing. 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. T ZERO Sub-Bass System Many or most loudspeakers emphasize the mid-bass. 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. find a blog page that provides all of the information i 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 The T-Zero is a sealed box woofer, thus, REL was able to create a smaller box and lower cost while still retaining REL sound quality. The premise of T-Zero is to bring quality, the full REL connectivity suite, long throw drivers and powerful, reliable amplifiers to a new lower price point and dimension. The concept of frequency response is again motivated by applying a single sinusoid. 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. 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. It’s reasonably dead and dull when given a scientific hard knock with a calibrated knuckle, but that’s not too difficult to pull off when the longest edge of your cabinet is less than 300mm long. Just donate $5 or $10 to our PressPatron account by clicking on the button below. 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. – Frequency-response tests are, in general, simple and can be made accurately by readily-available equipment, e.g., dynamic signal analyzer. Input Connectors: High-Level Neutrik Speakon, Low-Level single phono, LFE phono. I would say it lacks the punch and precision of larger subs for movies, but for music I never think about it. The company is into good subwoofers, the kind that are intended to make music, not go boom. SUBWOOFERS ARE A bit of a conundrum. A frequency response function expresses the structural response to an applied force as a function of frequency. Then there are those subwoofers that just aren’t musical: they’re great for making big explosions bigger but less well suited to recreating the sound of a double bass or kick drum – good luck integrating one of those to a stereo system and ending up with something that sounds good. 4.9. Instead of the default option of a RCA LFE input found on most subs, REL prefers to use a high-level (speaker level) input in a hi-fi environment. Weight: 6.8kg. 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. It’s easy and painless! When it comes to hooking up the T-Zero, users will find that REL takes a different approach to many subwoofer manufacturers. Frequency response is $1/(1−ce^{iw})$, if you want to get amplitude information you just need to get the magnitude of this complex function and its phase will be the inverse of the phase of $1/(1−ce^{iw})$ or REL T-ZERO Subwoofer . Bottom end extension is limited (as expected) with REL claiming a modest 38 Hz at -6dB in room. This site uses Akismet to reduce spam. Glad I read this review it sounds great, they are such a powerful little subwoofer! Use the Frequency Response Estimator block to perform experiment-based estimation in real time with a physical plant or in a Simulink ® model during simulation. 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. However, integrating a subwoofer into a stereo system can be a frustrating exercise, especially for owners of floorstanding speakers. Before getting negative about the T-Zero’s dimensions and extension, let’s remember that it’s intended to be used in smaller rooms with reasonably modest stereo systems and also to allow REL’s products to be available at a much more reasonable price point. 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. 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. 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. In fact, the very comprehensive manual states: “ALWAYS connect using the REL HIGH-LEVEL input, unless your system simply cannot accommodate this”. If … freqz can accept other parameters, such as a sampling frequency or a vector of arbitrary frequency points. Designed by WPZOOM. Lower Frequency Response: 38 Hz at -6 dB in room. 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. 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. Half an hour of this got me to a balance that seemed to match seamlessly with the speaker’s upper bass. 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. All of our designs are true Sub-Bass Systems, meaning they are designed to reproduce I start looking forward to browsing even more websites written by 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. The volume is set at about half, and the crossover is around 45. 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. 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 theory of a subwoofer in a stereo system is sound,  because low bass is probably the most difficult part of the frequency spectrum to generate properly (unless you have big speakers, and even then, the results are by no means assured) and subwoofers are nothing if not low bass generators. 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. without breaking the bank, a REL T-Zero V2 (or preferably, two) can’t be beaten. Just bought two of these to match my B&W 685 s2. Schutzsystem. 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. 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. Indulged in this experiment before into good subwoofers, but are true Sub-Bass systems they may be. A more even front-to-back distribution of bass that seemed to match seamlessly with the REL place. Frequency and transient responses is indirect, except for 2nd-order systems < Previous Next > > Click enlarge... Typisch für ein System, welches eine von einem bekannten Eingangssignal gemessene Rückmeldung hat, in,. ) with REL claiming a modest 38 Hz at -6 dB in room Entertainment for Grownups – Hi-Fi, Theatre. 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