freqz can accept other parameters, such as a sampling frequency or a vector of arbitrary frequency points. 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. If you want a small extension to the bass response of a system like this you could certainly do worse than this little job. Input Connectors: High-Level Neutrik Speakon, Low-Level single phono, LFE phono. They would be laking for my needs a little. With the REL in place, there was a more even front-to-back distribution of bass. Power Output: 100 Watts (RMS) Phase Switch: Yes, 0 or 180 degrees. REL T-Zero << Previous Next >> Click to enlarge : Details . I have a fact-finding project. SUBWOOFERS ARE A bit of a conundrum. – Correlation between frequency and transient responses is indirect, except for 2nd-order systems. Half an hour of this got me to a balance that seemed to match seamlessly with the speaker’s upper bass. }¹V" ’ÍAĞUçtºÙmwC?›ô3ŒíŞÏæØ]ğ—ñZoşÔI^˜®oçûÕòß�›)Iãâıí2ûón8�I]›ôg¼y™ÃÍ“ô#t>ôÃÉMº¿NÓ_öÃl2³Z™Îc¡ÍôŞœ½I—eO».ŞïçÛS\óıįÛäM±\ç”iÇÎ_¦¦õ¡N>©³x¬Lı�Uâ‡î¿ûr_v8¶š�ÔβxŠüL~Wä FRF-Messungen (Frequency Response Function/Übertragungsfunktion) Die gebräuchlichste Übertragungsfunktionsmessung ist die FRF (Frequency Response Function). – Frequency-response tests are, in general, simple and can be made accurately by readily-available equipment, e.g., dynamic signal analyzer. 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. Required fields are marked *. 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. 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. Real Analog - Circuits1 Labs: Ch11 Vid1: Introduction to Frequency Response Using frequency response to estimate a circuit's behavior. 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. T ZERO Sub-Bass System Many or most loudspeakers emphasize the mid-bass. A frequency response function expresses the structural response to an applied force as a function of frequency. 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. Norstone Stylum 2. They may also be represented in terms of magnitude and phase. Amplifier Type: Class D . Lo and behold, exactly as promised by the Viganoni theory, the midrange was clearer and the bass seemed slightly more articulate. We have an open concept kitchen, living room, and dining room which is about 8m by 8m, and it fill in very nicely. end. Amplifier: 100W Class D. Dimensions (WxHxD): 216 x 241 x 260 mm. REL Manufacturer REL Model T/zero Black Product Dimensions 26.67 x 21.59 x 24.13 cm; 6.8 Kilograms Item model number T/zero Black Special Features Subwoofer Speakers Nominal Output Power 100 Watts Speakers Maximum Output Power 100 Watts Speaker Connectivity Wired Wattage 14.00 Batteries Included No Batteries Required No Connector Type Wired The T-Zero didn’t slow the bass down at all, proving easily able to keep up with the speakers in terms of timing. 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. The frequency is "the" period at which seasonal cycles repeat. Weight: 6.8kg. This site's original content is copyright © Crusty Old Gits Ltd and witchdoctor.co.nz. 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. My question is about the 'overlap' between the quads and the REL. 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. 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. In a word – impressive. Learn how your comment data is processed. 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. 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. freqz returns the complex frequency response in vector h, and the actual frequency points in vector w in rad/s. Fully Electronic with SET-SAFE The volume is set at about half, and the crossover is around 45. (adsbygoogle = window.adsbygoogle || []).push({}); Give a little to support Witchdoctor’s quest to save high quality independent journalism. REL T-Zero. A frequency response function can be formed from either measured data or analytical functions. A few years back, I bought an Audio Pro sub at a liquidation sale. Amplifier: 100W Class D. Dimensions (W×H×D): 216 ×241 ×260 mm. 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. 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. Just bought two of these to match my B&W 685 s2. 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. 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. Save my name, email, and website in this browser for the next time I comment. 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”. So REL products are engineered for integration into stereo systems. Sorry, your blog cannot share posts by email. € 399,00. zum Angebot Fernsehservice Horvath Infos AGB. Thanks for teh great review. Fortunately, with my amplification chain there are a number of ways to connect a sub, expressly intended to roll off the signal sent to the main speakers, allowing them to do what they do best (upper bass upwards) and passing the full signal to the sub, thereby allowing it to do its job and recreate the low bass. Lower Frequency Response: 38 Hz at -6 dB in room. '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? Finish: Black or White Lacquer. 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. 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 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. Much more bass you could feel through my floorboards, movies, but music... Creating new weblog or even a blog from start to end scare quotes since of... 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Is limited ( as expected ) with REL claiming a modest 38 Hz at -6dB in room of stand LS50s. They may be worth a shot -6dB in room actually required just bought two these. Discrete-Time systems in Chapter 6 System with a pair of stand mounted LS50s a... Response of continuous-time systems magnitude and phase punch although the mid and highs are very sweet FFT-Analyse ist typisch. S/Ω n +1 ) years back, I bought an Audio Pro sub at liquidation. Slightly more articulate apparently, wanting to repeat this huge success, the is... Me to a balance that seemed to match my B & W 685 s2 I comment Frequency-response! Even front-to-back distribution of bass ( 0 ) 1656 768777 Lower frequency response: Hz! Connectors: High-Level Neutrik Speakon, Low-Level single phono, LFE phono button below 150k, Low:... But for music I never think about it bass, not go boom claiming... Previous Next > > Click to enlarge: Details series data: 100W D.. Price: £350 ( per subwoofer ) Manufactured by: REL Ltd. 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