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Agenda n History of Revel n Our mission n Our product philosophy – Research – Design – Listening – Production n Products n Multichannel audio n Multichannel-specific.

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Presentation on theme: "Agenda n History of Revel n Our mission n Our product philosophy – Research – Design – Listening – Production n Products n Multichannel audio n Multichannel-specific."— Presentation transcript:

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2 Agenda n History of Revel n Our mission n Our product philosophy – Research – Design – Listening – Production n Products n Multichannel audio n Multichannel-specific products n Future products

3 History of Revel n Dr. Harman wanted a loudspeaker company as unsurpassed as Madrigal – No such loudspeaker company existed - it had to be created n January 1996 announcement – Company goals and direction n Unsurpassed performance and industrial design n Unparalleled resources – People, expertise, facilities, financing n Unheard of in high end audio n Around 400 U.S. speaker companies, Revel given unique opportunity to do it right

4 Revel Mission - Produce the World’s Finest Loudspeakers n What constitutes “the world’s finest loudspeakers”? Acoustical performance-first and foremost Unsurpassed quality All visual aspects

5 Revel Mission-Produce the World’s Finest Loudspeakers How? First rigorously designed high end loudspeakers Combining high-end sensibility with state of the art research and development Double-blind listening tests demonstrate listener preference Renowned industrial design team producing loudspeakers that look as great as they sound.

6 Revel’s Product Philosophy Overview n Research n Design n Listening confirmation n Production

7 Revel’s Product Philosophy Research n Research should be the first step – Avoid trap of false assumptions

8 Revel’s Product Philosophy Research n Resources to do genuine research n Industry-leading researchers – Dr. Floyd Toole n Long working relationship at Canadian National Research Council – Sean Olive – Many others

9 Revel’s Product Philosophy Research n World’s leading research to determine: – How we hear (starting at the beginning) – Important factors in perceived sound quality – Room acoustics – Loudspeaker/room interaction – Making listening tests valid scientific data n Only then do we know what we are trying to achieve!

10 Revel’s Product Philosophy - Research n Tradeoffs involved in all speaker design – Optimum performance can only be achieved by selecting the right priorities

11 Revel’s Product Philosophy - Research n What is the relative importance of various sonic characteristics? – Timbre – Directivity – Resonances – Distortion – Dynamics – Phase – Waveform preservation

12 Revel’s Product Philosophy - Research n Our listening tests and breakthrough measurement process are used to determine how significant sonic characteristics are affected by: – Transducer diaphragm, surround, motor, voice coil and former materials and construction – Enclosure shape, construction, materials, and damping – Filter network (crossover) component types and characteristics

13 Revel’s Product Philosophy - Research n How can these questions be answered? – 1000’s of double-blind listening tests n Our ears are the ultimate authority – Dozens of areas objectively investigated – Result is phenomenally powerful

14 Revel’s Product Philosophy - Research n We have determined what is sonically important : – Timbre-overwhelmingly dominant n Directivity – off-axis responses, critical to timbre – Resonances – must be kept below audible threshold – Dynamic compression-usually overlooked, but very significant – Distortion - frequency-dependent thresholds

15 Revel’s Product Philosophy - Research n...And what is not important, or less important… – Waveform preservation – not audible – Phase-audible in specific ways n Individual transducers must have good phase performance to enable proper crossover operation n Phase shift per se, is not audible in loudspeaker systems

16 Revel Product Philosophy - Design Now That We Truly Know What the Goal Is… n Designing products to address the results of our research: How do we characterize and measure: – Timbre? – Resonances? – Distortion? – Dynamic compression?

17 Revel Product Philosophy - Design Measuring Timbre n Timbre is the most significant audible characteristic - requires the greatest emphasis n Simple “on-axis” measurements of little to no value – Gave speaker measurements a (deservedly) bad name

18 Revel Product Philosophy - Design Measuring Timbre n Massive research effort comprised of in-room measurements and double- blind listening tests – Assures research and measurements have a basis in the “real world”

19 Revel Product Philosophy - Design Measuring Timbre n Breakthrough measurement process has been developed that has a high correlation to sound quality n Requires a combination of many measurements – Must be made in a very large anechoic chamber to retain important resolution n Sophisticated post-processing of all data based on the extensive in-room measurements and listening tests n Only U.S. High end loudspeaker company with such facilities

20 Direct Sound Measurements An improved method with an average of 7 measurements Mimics brain’s processing Commonly seen as “on-axis” response

21 Equally Important Early Reflections n Reflections with short delays are just as important as the direct sound. n Appropriate weighting for each boundary based on extensive research. n Most loudspeakers perform poorly in this test.

22 Reverberant Sound Contributes to Perception of Timbre n The loudspeakers’ output in all directions contributes. n Includes sound heard after multiple reflections from all boundaries.

23 Single Calculated Curve Correlates Closely to Sound Quality n Weighted average of all measurements based on measurements in many listening rooms.

24 Revel Product Philosophy - Design n Having created measurements that have been proven to be sonically relevant, what tools are required to provide optimum performance according to these new tests?

25 Revel Product Philosophy - Design n Three State of the Art Anechoic Chambers – Provide high resolution results – Do not suffer from disadvantages of simulated chambers

26 Revel Product Philosophy - Design n 180 Hz 4 pi anechoic chamber – 5,000 cubic feet (142 cubic meters) – Full transparent floor

27 Revel Product Philosophy - Design n 60 Hz 4 pi anechoic chamber – 10,000 cubic feet (283 cubic meters) – 1200 four foot (1.2 meter) wedges – Calibrated to +/- 0.5db below 60 Hz

28 Revel Product Philosophy - Design n 2 pi anechoic chamber – 7,000 cubic feet (198 cubic meters) with 800 three foot wedges

29 Revel Product Philosophy - Design n Complete in-house transducer design and production – Optimum transducers for each specific application – State of the art transducers not available from any vendor n Midranges are limitations in many speakers – Inadequate spectral range – Inadequate power handling/high compression n OEM woofers have power handling and compression limitations

30 Revel Product Philosophy - Design n Unequalled design resources – FEA (finite element analysis) design of motor systems, surrounds, and spiders

31 Revel Product Philosophy - Design - Unequalled Design Resources Laser scanner for domes, surrounds, and enclosures n Enabled fully pistonic midranges n Optimized surround behavior for greatly reduced distortion and smoother midrange response n Optimized enclosure shapes, materials, and construction

32 Revel Product Philosophy - Design n Laser interferometry – Diaphragm development Revel Midrange Competitor’s Midrange

33 Revel Product Philosophy - Design n Unequalled transducer design resources – Rapid prototyping with stereo lithography – Fast samples of any 3-dimensional parts, such as baskets – Enhanced ability to try multiple iterations Dr. Green from ER dropped by to help us

34 Revel Product Philosophy - Design Dynamic (Power) Compression n Does more than rob the music of life n Changes timbre as the music plays – Frequency-dependent and non-linear n Revel has reduced dynamic compression to levels previously associated only with horn- loaded systems

35 Revel Product Philosophy - Design Dynamic (Power) Compression n We have developed quantitative tests – Has given us valuable data regarding what is effective to reduce compression – Tests are performed throughout both the transducer and system development processes Sub-15 with LE-1– compression results

36 Revel Product Philosophy - Design Dynamic (Power) Compression Minimized in All Revel Loudspeakers n Huge voice coils for given application – Salon, voice, embrace 1 1/2” (38 mm) voice coils in 4” (102 mm) midrange – Gem 2” (51 mm) voice coil in 5 1/4” (133 mm) woofer – Sub-15 uses 4” (102 mm) single layer flat wire voice coil

37 Revel Product Philosophy - Design Dynamic (Power) Compression Minimized in All Revel Loudspeakers n High-order filters (crossovers) drastically reduce compression compared to 1st-order systems n Tight gaps to optimize heat transfer designed with F.E.A. (Finite element analysis) n Large motor systems for heat dissipation

38 Revel Product Philosophy - Listening Tests n Rigorous listening tests are true measurements, not just opinions. – The ability to perform truly objective listening tests is a huge advantage. n Double-blind listening tests prove revel’s superiority. n Six varied listening rooms. – Five fixed rooms at 2100 ft3 (59 m3), 3000 ft3 (85 m3), 4500 ft3 (127 m3), and 5400 ft3 (153 m3).

39 Speaker Mover Listening Lab n Automated speaker mover to eliminate speaker -position variable or to efficiently test its effects (e.g. off-axis performance, digital room EQ ) n Physically and acoustically optimized and equipped for scientific testing of two-channel and multichannel configurations n Acoustically transparent screen hides identities of loudspeakers n Experimental design, control, collection and analysis of data automated under computer control

40 Speaker Mover in the Listening Lab

41 Detail of Speaker Mover

42 Double-blind Listening Room (MLL) From Front

43 Automated Speaker Mover: Why? n Loudspeaker Position has significant influence on perceived sound quality. The effect can be as great as the differences among loudspeakers (Olive et al., JAES vol. 42, 1994) n Therefore, in listening tests, variable of position MUST be eliminated or controlled n For in situ tests, position effects can only be controlled and balanced by testing each loudspeaker in each possible position

44 …. x 4 speakers = 24 possible speaker- position permutations per program …. x 4 speakers = 24 possible speaker- position permutations per program Trial # Position: Example: With 4 programs there would be 96 trials (with no repeats) Before Speaker Mover…. Example: A/B/C/D Loudspeaker Comparisons

45 …. x 4 speakers = 24 1 possible speaker- position permutation per program. Trial # Position: Example: With 4 programs there would be 96 4 trials (with no repeats) After Speaker Mover…. Example: A/B/C/D Loudspeaker Comparisons

46 Speaker Mover Analysis Station Multi- dimensional analysis provides important data for ongoing research Guards against erroneous conclusions

47 8 7 6 BLIND SIGHTED 1G 1D S T PREFERENCEPREFERENCE RATINGRATING Blind Vs. Sighted Tests

48 n Visual cues have statistically significant influences n In “sighted” tests opinions can be influenced more by product identity than by the sound of the product. n In “sighted” tests listeners were less responsive to differences attributable to position or to program. n In other words - Believing is Hearing Blind Vs. Sighted - Summary

49 Comparative Listening Tests Double-blind listening tests prove superiority n Revel sonic superiority proven before product release

50 Renowned Multichannel Listening Facilities n Used by F.C.C. for U.S. high definition (DTV) television audio standard listening tests n 5,400 ft3 (153 m3)

51 Revel Product Philosophy -Production n Vertical integration enhances quality – Design transducers in-house n Build most transducers in-house

52 Revel Product Philosophy - Production n Vertical integration enhances quality n State of the art in-house enclosure finishing facilities Several coats of sealer, with sanding in-between Polyurethane finish applied to primed surface

53 Revel Product Philosophy - Production n Vertical integration enhances quality n State of the art in-house enclosure finishing facilities Temperature controlled oven assures durable finish Clear coat sealer for deep shine

54 Revel Product Philosophy - Production n Vertical integration enhances quality n State of the art in-house enclosure finishing facilities First clear coat polishing with coarse polishing compound Final clear coat polishing with fine polishing compound

55 Revel Product Philosophy - Production n World’s greatest prototype is irrelevant if production units are not the same! n Best OEM vendors have +/- 3dB variations in response n 0.5dB variations, over a wide range, are very critical n Matching pairs is insufficient--Only guarantees two equally flawed speakers

56 Revel Product Philosophy - Production Unsurpassed Quality Measures n Individual crossover tuning for virtually perfect replicas of original reference

57 Unique Products n Proven to be state of the art in listening tests in 2- channel stereo applications n All Revel loudspeakers were conceived and built with multichannel audio in mind n No compromises are made in 2-channel performance to optimize multichannel performance n The Salon, Studio, Gem, and Sub15/LE-1 are equally at home in 2-channel or multichannel systems

58 The Salon Loudspeaker n The world’s most accurate loudspeaker – A whole new level of freedom from loudspeaker coloration – Unparalleled off-axis accuracy n Everything we know about loudspeakers utilized – From its inception and throughout the design process

59 The Salon Loudspeaker n State of the art transducers reduce distortion below audibility

60 The Salon Loudspeaker n New, advanced aluminum alloy dome tweeter n Pistonic to over 30 kHz n The state of the art in high frequency performance

61 The Salon Loudspeaker n 4” (102 mm) titanium midrange  Pure titanium alloy concave dome  Large 1.5 inch (38 mm) voice coil  Optimized high-flux neodymium motor  Co-injected fluoro-elastomer rubber surround  Magnetic shielding

62 The Salon Loudspeaker n Three high output, low compression 8” (203 mm) woofers – Very high output capability with true full range extension – 1.5 inch (38 mm) 6 layer voice coil with 26 mm winding length – Very high flux, optimized motor system – Copper sleeve on pole piece to minimize inductance and eddy current modulation distortion – Concave poly cone with nitrile rubber surround for optimum balance of stiffness and mass – Magnetic shielding to allow placement near video monitors

63 The Salon Loudspeaker n 6 1/2” (165 mm) mid-woofer allows smaller midrange, higher crossover for lowest coloration n Optimized for low compression, with 1.5 inch (38 mm) voice coil n High flux, low distortion motor system F.E.A. optimized to minimize non-linear distortion – Copper sleeve on pole piece to minimize inductance and eddy current modulation distortion – Concave poly cone with nitrile rubber surround for optimum balance of stiffness and mass – Magnetic shielding to allow placement near video monitors

64 The Salon Loudspeaker n Calibrated, precision high frequency trimming n Allows for high frequency room characteristic compensation n 0.5 dB increments precisely tailor response, assure left/right response matches at any adjustment n Highest quality switches for extremely long life without audible colorations

65 The Salon Loudspeaker n Low frequency adjustments – Help optimize performance in a wider range of rooms and room placements

66 The Salon Loudspeaker n Filters (crossover): 4-way, 24 dB/octave (4 th -order) acoustic response at 125 Hz, 450 and 2.2 kHz n Sensitivity: 86 dB SPL, with 2.83 volts 1 meter, 4 pi (anechoic) n Impedance: 6 ohms nominal, 3 ohms minimum

67 The Salon Loudspeaker-Frequency Responses n In-room response: ± 1 dB from 25 Hz to 12 kHz n In-room response relative to target response: ± 0.75 dB from 25 Hz to 20 kHz n First-reflections response: ± 1 dB from 25 Hz to 17 kHz n Listening window response: ± 1.5 dB from 25 Hz to 18 kHz n Low frequency extension: Hz Hz. (-3 24 Hz)

68 The Studio Loudspeaker n Created to deliver much of the Salon’s performance in a smaller package n Utilizes the same state of the art tweeter as the Salon, along with the same ultra-low diffraction baffle n 5 ¼” inverted titanium dome pistonic midrange from the Gem – Allows a lower (220 Hz) crossover point, eliminating the need for the Salons’ 6 ½” mid-woofer – Allows the two 8” woofers to be farther from the floor, reducing the chance of lower midrange coloration

69 The Studio Loudspeaker n Two (rather than three) Salon 8” woofers provide excellent low frequency output capability n Low frequency extension: – Hz (instead of 17 Hz in the Salon) – Hz (instead of 20 Hz in the Salon) – Hz (instead of 24 Hz in the Salon)

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71 The Gem Loudspeaker n Cost-no-object compact system – Flexible applications n Groundbreaking industrial design

72 The Gem Loudspeaker n Advantage to place for optimum performance, ignoring low-bass when used with Sub-15 n Designed from the ground up as a system n State of-the-art transducers

73 The Gem Tweeter Construction Details Very linear response, with low compression and distortion

74 Gem Woofer Construction Details Titanium dome allows true pistonic operation throughout its operating range Motor derived from JBL Pro LSR32 Optimized for lower distortion and compression

75 Gem Final Assembly

76 The Sub-15 Subwoofer and the LE-1 System n Redefines low frequency reproduction - Actual timbre can be perceived n Absolutely state of-the-art performance n Purist approach (and brute force)

77 The Sub-15 Subwoofer and the LE-1 System n Previous state of the subwoofer art: – Sliding EQ and compression severely limit performance n Limited amplifier output capability (no FTC requirements) n Limited voice coil thermal capacity n Limited cone assembly mechanical durability

78 The Sub-15 Subwoofer and the LE-1 System n Overcomes performance limitations of competitors – No need to disguise lack of power handling, lack or amplifier power, or lack of mechanical capability – Means no sliding EQ or limiting that dynamically alters response – Massive 0.36 lb. (163 gram) edge-wound flat wire voice coil

79 The LE-1 Low Frequency Electronics System n Provides equalization for Sub-15 n Massive output capability of over 700 watts into one Sub-15, or over 1,000 watts into two Sub-15s. n Crossover ideally blends Revel speakers with Sub- 15

80 The Sub-15 Woofer Construction Details Motor derived from JBL Pro 2242 woofer Reduced distortion, increased excursion, and reduced suspension non-linearities

81 Interim Summary n Revel has unparalleled resources n Industry-leading research n Acoustical goals clearly identified n Completely optimized designs – Utilizing all knowledge from research n Objective listening tests prove superiority n Production processes guarantee consistency

82 Multichannel Audio

83 Multichannel Audio - Why? n Opportunity of significantly improved sonic reality n Two channels cannot capture or reproduce an acoustic event n Attempts to create “ambience” in the listening room are inherently flawed

84 Multichannel Audio - Why? n Original performance venue ambiance can be captured and reproduced n No compromises need to be made in 2- channel performance – Wide dynamic range requirements should be addressed for 2-channel, as well as multichannel and home theater

85 Multichannel Audio - How? n DVD Audio (not AC-3) provides the bandwidth to provide 5.1 or more channels at better than CD quality n Acceptance of 5.1 configuration for home theater provides breakthrough opportunity for multichannel audio

86 Multichannel Audio - The Risks n System configuration is far more complex than 2-channel stereo n Significant learning curve exists for proper product selection and application (installation)

87 Multichannel Audio - The Risks – Risk exists to actually degrade overall sonic accuracy n If the added channels (center and surround) have higher coloration in their intended locations than the front left and right speakers, the overall system coloration can increase, compared to a 2-channel system

88 Multichannel Audio - The Central Challenges n Match timbre properly in all channels in the listening room – All loudspeakers must be as accurate at the main left and right speakers n Reproduce intended soundfield accurately

89 Multichannel Audio - Revel Excels n The first purist audiophile multichannel loudspeakers n Everything discussed so far was applied to Revel multichannel models n All Revel “Front” speakers, and Sub-15/LE-1 designed equally for 2-channel and multichannel without compromise for either

90 Multichannel Audio - Revel Excels n Multichannel-specific models (centers and surrounds) meet the challenges of: – Timbre matching in the listening room – Accurate soundfield reproduction – Extraordinarily low coloration

91 Multichannel Audio - Timbre Matching n Timbre of front left and right channels, in their placement positions, must match timbre of center and surrounds in their radically different placement locations n To sound the same to the listener, speakers must be specially designed for their application – Identical speakers should not be used all around

92 Multichannel Audio - Center Channel Speakers n Center channels are almost always closer to a boundary than the left and right speakers – Closer to the floor – Closer to the ceiling – Close, or on top of, a rear projection monitor – Dramatic coloration is introduced, unless the loudspeaker is designed specifically for the environment

93 Typical Frequency Response of High Quality Loudspeakers Utilized in Left and Right Front

94 Typical Frequency Response of Conventional High Quality Loudspeaker Utilized in a Center Channel Position

95 The Voice Center Channel Loudspeaker n The solution to center channel challenges n Proper timbre matching in real- world applications n 3-way design provides uniform response over very wide listening area

96 The Voice Center Channel Loudspeaker n Made to work in real environments – Switch- selectable placement compensation

97 The Voice Center Channel Loudspeaker n Front projection application

98 The Voice Center Channel Loudspeaker n Rear projection or direct-view application

99 The Voice Center Channel Loudspeaker n Custom built-in application

100 The Voice Center Channel n Two 8-inch (210 mm) mica and carbon-filled co-polymer dome woofers with 2-inch (52 mm) voice coils featuring copper shorting rings to dramatically reduce distortion n Four-inch (102 mm) titanium dome midrange with 1.5-inch (38 mm) voice coil and true pistonic operation throughout its operating range n 1.1-inch (28 mm) textile dome tweeter with extremely low distortion and compression n 4 th -order crossovers at 300 Hz and 2.2 kHz n Optimized response for use with 80 Hz electronic crossover

101 Multichannel Audio - Surround Loudspeakers n Surround speakers are in very different locations than front speakers – Surrounds must be specifically designed for this reality – Front Left/Right speakers used as surrounds provide poor timbre matching and unacceptable spatial characteristics

102 Multichannel Audio - Typical Front Left/Right Response

103 Multichannel Audio - Front Speakers Utilized as Surrounds

104 Multichannel Audio - Proper Surround Placement

105 The Embrace Surround Loudspeaker - Timbre and Spatial Reproduction n Multi-channel timbre matching in practical, wall- or ceiling-mounted locations n Unparalleled spatial reproduction – Freedom from excessive localization – Superb performance over wide listening area

106 The Embrace Surround Loudspeaker - Radiation Pattern n Acoustic recordings (classical and jazz) need dipoles n All films mixed utilizing non- localizable surrounds n Embrace scales original sound field to smaller spaces

107 The Embrace Surround Loudspeaker n 8-inch (210 mm) mica and carbon-filled co-polymer dome bass transducer with 2-inch (52 mm) voice coil and copper shorting ring for low distortion n Two 4-inch (102 mm) titanium dome midranges with neodymium motor systems and 1.5-inch (38 mm) voice coils for extraordinary power handling n Two 1-inch (26 mm) coated textile domes optimized for low distortion and high power handling

108 The Embrace Surround Loudspeaker n Bipole option to ease customer concerns n Remote-controlled dipole/bipole switching. n Dual-Drive for non- obsolescence. n First-reflections response: ± 1 dB from 25 Hz to 17 kHz. n Listening window response: ± 1.5 dB from 25 Hz to 18 kHz.

109 Revel Product Line - The Future n Ultima Series – Ultima Studio 3-way floorstanding system

110 Ultima Studio 3-way floorstanding system n Ultima series styling n Salon metal dome tweeter n 5 1/4” (133 mm) pure titanium dome midrange similar to Gem woofer n Two 8” (203 mm) high output woofers similar to Salon woofers n 1114 mm high x 324 mm wide x 492 mm deep

111 Revel Product Line - The Future Affordable, high performance line – Performa F30 – 3-way floorstanding system for less than $3,900 U.S. retail – All metal transducers

112 Revel Product Line - The Future Affordable, high performance line – Compact monitor system M20 for under $2,000 U.S. retail

113 Revel Product Line - The Future Affordable, high performance line – 3-way center channel C30 for under $1,800 U.S. retail – Dipole surrounds S30 for under $2,500 per pair U.S. retail – 15” powered subwoofer system B15 for under $2,800 U.S. retail

114 Summary n Revel has Achieved our Goals: – Superior acoustical performance – Cutting-edge Industrial Design – Unparalleled overall quality

115 Summary n Revel has Unparalleled: – Research – Design sophistication – Technical resources – Listening tests as tools – Production consistency

116 Summary n Revel products proven sonically superior n Unique multichannel market position: – The only true high end multichannel loudspeakers

117 Summary n Revel’s products are ideal for market needs: – Superior two channel sound n Floorstanding n Compact n Subwoofer system n Complementary multichannel products avoid obsolescence n Center channels n Surrounds

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