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 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. 'Y‹ÖᯰY'÷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? 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. 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
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The frequency response of continuous-time systems gives another view, just as it did for discrete-time systems in Chapter 6. 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. The concept of frequency response is again motivated by applying a single sinusoid. 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 Ähnlich wie die FFT-Analyse ist FRF typisch für ein System, welches eine von einem bekannten Eingangssignal gemessene Rückmeldung hat. 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. 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. Ô¾ô? Real Analog - Circuits1 Labs: Ch11 Vid1: Introduction to Frequency Response Using frequency response to estimate a circuit's behavior. 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. 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. The Rel T Zero is small, discrete, and beautiful. 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. Tel: +44 (0)1656 768777 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. In a word – impressive. 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. A few years back, I bought an Audio Pro sub at a liquidation sale. Going for a higher end model would be my choice though. Price: £299 (per subwoofer) Manufactured by: REL Ltd. URL: www.rel.net. Connections: High-Level Neutrik Speakon, Low-Level single phono, LFE phono. They may also be represented in terms of magnitude and phase. This is the range from 50 to 90 Hz. T ZERO Sub-Bass System Many or most loudspeakers emphasize the mid-bass. 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. 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. I have a fact-finding project. Page 11 REL Set-Up Made Simple REL products are not traditional subwoofers, but are true Sub-Bass Systems. you down the road, and will take a look right here first of all the very next time 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. The designer of my amps is Franco Viganoni, a man who’s utterly convinced that bass can only be properly generated by a good subwoofer from a specific brand (Audio Pro, if you must know), and as much as he’d frown on the idea of another brand of sub being used with his amps, the little T-Zero was an intriguing concept that begged for a listen. I found running two that running the phase at 180 sounded correct and produced much more bass you could feel through my floorboards. The volume is set at about half, and the crossover is around 45. The company is into good subwoofers, the kind that are intended to make music, not go boom. Finish: Black or White Lacquer. A frequency response function can be formed from either measured data or analytical functions. – Correlation between frequency and transient responses is indirect, except for 2nd-order systems. Lower Frequency Response: 38 Hz at -6 dB in room. What can be a mighty pain, was more or less a simple matter of dialling down the sub to get its contribution to subtly add to the bottom end of the speakers without creating too much of a bass peak. 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. If you want a small extension to the bass response of a system like this you could certainly do worse than this little job. I guess it should be circular pseudo-frequency, or I don't know how you say that. But your review makes me think they may be worth a shot. 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. Sorry, your blog cannot share posts by email. I would say it lacks the punch and precision of larger subs for movies, but for music I never think about it. Draw the gain term (ω n)separatelyfromthezeroterm(s/ω n +1). Description. A LFE input is also provided, and the speaker level and the LFE input can be run simultaneously and set up differently with their own controls to allow users to effectively have a “hi-fi sub” and a “home theatre sub”. 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. Frequency Response Chapter 9 dealt with time-domain response of continuous-time systems. So REL products are engineered for integration into stereo systems. 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. Weight: 6.8kg. The frequency response at all frequencies from zero to half the sampling rate can be represented by a modulus spectrum of ... Modal resonances usually appear as circles when a Frequency Response Function (FRF) is plotted in real versus imaginary form or as clearly defined peaks when the FRF is plotted as a modulus spectrum. Never heard these before. Save my name, email, and website in this browser for the next time I comment. H‰\“Ën£@E÷|E/“EÄ«»*HÈ’c'’“Dã™ÀĞö �µñÂ? Just donate $5 or $10 to our PressPatron account by clicking on the button below. However, the sub integrated with the room better than the speakers do, creating fewer high pressure bass nodes. Your website has definitely offered me personally with just the facts that I actually required. In fact, the very comprehensive manual states: “ALWAYS connect using the REL HIGH-LEVEL input, unless your system simply cannot accommodate this”. The frequency is "the" period at which seasonal cycles repeat. Glad I read this review it sounds great, they are such a powerful little subwoofer! Tel: +44 (0)1656 768777 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. This paragraph will assist the internet visitors for creating new weblog or even a blog from start to € 399,00. zum Angebot Fernsehservice Horvath Infos AGB. 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. http://souforum.com/. 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. Thanks for teh great review. We at REL believe this is an incomplete approach and that loudspeakers need to be extended in the lower frequencies for true full range reproduction. The T-Zero didn’t slow the bass down at all, proving easily able to keep up with the speakers in terms of timing. The T-Zero is fitted with aluminium feet with a matching badge on top, and even the bolts holding on the control panel are the polished T-304 stainless steel type – this little sub is beautifully put together, especially considering the price. 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. 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. Power Output: 100 Watts (RMS) Phase Switch: Yes, 0 or 180 degrees. 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. 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