hvornår bruger man subwoofer i stereo?

JeTex skrev: Du finder sjældent en almindelig consumer højttaler der går så dybt i frekvens, men med rette pengepung kan det lade sig gøre. En subwoofer kan give det sidste, og bruges især til stereo ved brug af standerhøjttalere. En god højttaler i High End klassen, gengiver i omegnen af 25-35 Hz. Mine egne B&W 802s3 gengiver 27Hz-20kHz ved +-2db free field, og 22Hz-25kHz -6 db.

Når jeg er noget kritisk mht. de dybe toner, skyldes det, at de skal kunne klare lyden fra et stort koncertkirkeorgel, uden brok.

Redigeret af turbo2 - 31-December-2014 kl. 19:06

Henrik B. skrev: Dynaudio's Confidence C2 går ned til 28 Hz +/- 3db. M.v.h.

Ja, C2 er overbevisende, men Focus XD 600 er åndsvag vild (på den gode måde).


Focus 600 XD
The Focus 600 XD is the flagship Focus XD model and sets the definitive performance standard for high-end digital active loudspeakers.
The Focus 600 XD is for those seeking the best possible audio performance and completely uncompromised sound quality.
Images

Focus 600 FrontSide Black GrillFocus 600 FrontSide BlackFocus 600 Side BlackFocus 600 Side Black GrillFocusXD_back.jpg
Colors

White.jpgRosewood.jpgWalnut.jpgblack.jpg
The Focus 600 XD redefines the high-end loudspeaker and high-end audio system: the perfect combination of a full-size floor-standing loudspeaker and high-performance digital amplification.

Both of the ultra-long-throw Esotec+ woofers feature extremely large and powerful magnets, and each is driven by its own individual 150W power amplifier to ensure that impressive low frequency output (to 20 Hz) is always delivered at the highest level of precision and accuracy.

The proprietary MSP driver cone material, together with the renowned soft dome tweeter with precision coating, ensures the tonal perfection and balanced sound characteristic of Dynaudio.

The Esotec+ midrange driver and tweeter in the Focus 600 XD are also each individually driven by a high-performance 150W power amplifier, and the four drivers are perfectly harmonized through the highly sophisticated state-of-the-art DSP.

With a combined power output of 600W per speaker, the 600 XD offers a performance reserve allowing it to realistically reproduce the most demanding large orchestral performances, to faithfully recreate the feeling of a live recording, or to deliver the full impact, energy and depth of modern electronica music.

The Focus 600 XDs are easily integrated into any room, regardless of its size or the scale of your music: Using the Focus XD Speaker Position EQ, the bass response can be tailored to the particular room acoustics. The retractable spikes integrated within the aluminum outrigger feet ensure that the speakers can be safely positioned on any floor surface while minimizing resonance.

Featuring the same features of the other Focus XD models, the 600 XD includes both analogue and digital inputs, is able to be operated via remote control, can be expanded to deliver wireless and or multi-room playback, and features upgradeable firmware.

The benchmark for high-end active loudspeakers has taken a quantum leap.

Specifications
Specs and features
Inputs:
Digital Audio IN:
Connection: RCA, 75 ohms coax
Interface: SPDIF
Resolution: 16/24 bits
Sample rates: 44.1/48/88.2/96/176.4/192 kHz

Digital Audio OUT:
Connection: RCA, 75 ohms coax
Interface: SPDIF
Resolution: 16/24 bits
Sample rates: 44.1/48/88.2/96/176.4/192 kHz

Analog Audio IN:
Connection: RCA
Maximum input voltages (+6dB/0dB/-6dB): 1/2/4 Vrms

Service USB Firmware upload.

Wireless:
Hub playback: 16 bits/48 kHz
Direct input playback: 24 bits/96 kHz
Wireless RF bands: 2.4/5.2/5.8 GHz

Tweeter:
27 mm soft dome, rear chamber, magnetic fluid
4mm aluminium front
Pure aluminium wire voice coil

Woofer/midrange:
14/18 cm moulded aluminium frame.
One piece thermo formed MSP cone.
38/54 mm diameter pure aluminium wire voice coil.

Crossover:
Active DSP based filters
True time coherent phase linear FIR filters
Vertical and horizontal dispersion optimized

Cabinet:
21mm MDF
Front grille with magnetic snaps
IR receiver on corner of speaker and LED-strip for user
information

Amplifier:
Wireless digital signal transmission.
High efficiency digital amplifiers
Wide range switch mode power supply
Room adaption knob.

Specifications
Frequency Response:
20 Hz – 24 kHz

Sådan er det når højttaler producenten også får kontrollen over forstærkeren.

Redigeret af Notfast - 01-Januar-2015 kl. 10:12

KlausDM skrev: Vel ikke så meget forstærkeren, men DSP'en der retter frekvensgangen. B&O "smølferne" (Beolab 5) har et frekvensområde fra 14Hz til 21 kHz. http://www.bang-olufsen.com/da/sound/loudspeakers/beolab-5 Klaus

Det frekvensområde er vist ikke meget værd:
"** Effektiv frekvensgang måles ved -10 dB re. Referenceniveau (200-2.000 Hz)"

M.v.h.

Meget interesant emne dette her.
Især fordi tingene ofte er farvet og sminket af producenterne, stort set som med effekt i forstærkere/receivere.
Uden jeg på nogen måde vil kloge mig, tværtimod ønsker jeg gerne sande fakta omkring naturstridigheden med relativt kompakte 6,5 tommer basser skulle spille ned til 30 hz.
Har da en fornemmelse om at bas størrelse samt kabinet størrelse er ligmed dybere bas? Eller er det forkert?
Og stort set de fleste også dyere highend modeller benytter sig i 6,5 tommer størrelsen.
Hvor JBl samt Cerwin Vega jo ofte er i 12 og 15 tommer.
Er godt klar over det også er bastrykket og ikke nødvendigvis dybere toner, større enheder giver, men stadigvæk.
Somsagt spændene tråd at følge.