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Symposium Acoustics Reflection TLS Loudspeaker

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Reflection TLS Loudspeaker

Item # : SYMP-REFTLSLOUD

Brand New In Factory Sealed Packaging

OR
Reflection TLS Loudspeaker

Introduction

The Reflection (shown at left, above) and Reflection TLS (shown at right, above) utilizing proprietary driver and vibration control technologies, are guaranteed to outperform any other loudspeaker of the same size, regardless of price. The Reflection loudspeakers excel in transparency, dynamics, realistic image size, soundstaging, and neutrality.

Origins

The Symposium Reflection and Reflection TLS borrow technology from the state of the art ribbon/planar/dynamic hybrid Panorama loudspeaker. The Panorama has been the recipient of rave notices from many sources.

The UMD Driver

The Reflection and Reflection TLS' Upper Midrange/Tweeter (UMD) driver is a unique planar magnetic dipole driver that spans the midrange and high frequency ranges with a natural ease, fluidity and lifelike realism not found anywhere else. It features proprietary technology which enables it to operate throughout an unusually wide frequency range without the problems common to other planar drivers (including characteristic diaphragm "drum head" resonance and beaming). What makes the UMD unique? With a driver aperture of only six inches by one and three quarter inches (15 x 4.4 cm), it provides good dispersion with no "beaming." Its specially treated, ultra light diaphragm exhibits virtually zero self-resonance, and is minimally recessed inside its laser-cut stainless steel baffle. Recessing a diaphragm inside an enclosure (such as is done with nearly all ribbon tweeters) results in frequency response aberrations and also signal diffraction, which impairs imaging and soundstage size. The UMD's minimally recessed diaphragm preserves wide, deep spatial imaging, and provides extremely fast, smooth response from the lower midrange to the upper limits of hearing, a feat not matched by any other direct radiator driver of its surface area, including electrostatics. The advantages of a single, modest-sized driver handling such an unusually wide six octave range without any crossover elements makes possible coherency and transient accuracy that is simply not possible with separated cone and dome drivers. The unusually low frequency response of the UMD also enables a crossover point low enough to allow the woofer to operate primarily in its optimal, linear piston range. The UMD's proprietary, low-mass diaphragm and suspension has virtually no resonance, adequate excursion capability, and low secondary noise, and is mounted in a gently curved, damped stainless steel structure with a super-powerful neodymium magnet motor. To eliminate electrical noise caused by the usual mechanical contact methods of delivering a signal to the diaphragm, the UMD's diaphragm is connected by pure silver solid rectangular leads directly soldered to the ultra light ribbon traces of the diaphragm. The electrical circuit of the diaphragm is then impedance-matched through a custom transformer wound with silver/copper wire.

Enclosure

The bass of the Reflection (and midbass of the Reflection TLS) is handled by the MB-1 driver module of the Panorama, which uses a specially modified, 8 inch low-mass Kevlar woofer. A sealed enclosure was chosen over the more common vented enclosure, since sealed enclosures exhibit superior transient response as well as more extended low frequency response than vented systems. Enclosure construction is robust and consists of multi-layer, constrained-layer wall construction (similar to that found in Symposium's Ultra and Super Platforms) bonded to aluminum layers on all sides. The low frequency driver is held in a front panel which is precision machined from solid, half-inch (12mm) thick 6061 aircraft aluminum. A mating annular mounting ring of matching 6061 aluminum holds the woofer and damps the rim circumference, eliminating resonances in the mounting flange. This method holds the driver more firmly and uniformly than the usual 6- or 8- screw system used in most loudspeakers, affording improved damping and stiffening of the entire basket structure. The mounting flange also holds the driver against an internally mounted damping system which contacts and supports the woofer at the rear of its magnet structure, coupling the woofer magnet housing and woofer basket assembly to the MB-1's internal crossbracing. This allows energy dissipation away from the woofer superstructure while increasing rigidity and damping. Held this way, the woofer driver's motor and frame is more rigid and less prone to spurious motion while vibration-damped by the internal cabinet structure, which is itself a damping system. These techniques allow the low mass woofer driver, carefully chosen for its excellent transient response and extended low frequency response, to perform closer to theoretical limits.

"Floating" Midrange/Tweeter

The UMD planar driver is held by a special damped isolation suspension which "floats" the driver, isolating it from the low frequency enclosures. Loudspeakers suffer from increased intermodulation distortion when high frequency and midrange drivers are rigidly mounted to the bass enclosures. Driver position is adjustable to ensure correct time-alignment to the woofer.

Integrated Isolation Stand

The Reflection's stand is a sophisticated loudspeaker damping and isolation system, consisting of a specially articulated Svelte Plus platform, three solid aircraft aluminum grounding columns, a Super Plus platform base, and four HDSE Rollerblock Jr. ball bearing isolation footers. The two platforms and the 6061 aluminum columns perform enclosure damping, isolation, and energy dissipation, while the Rollerblock system decouples the loudspeaker from low frequency wave reflections which return through the floor. The Reflection TLS (see below) adds a dedicated transmission line subwoofer in the space occupied by the Reflection's three grounding columns. The subwoofer module is additionally HDSE Rollerblock Isolated from the Mid Bass/Lower Midrange sealed enclosure, and is coupled to its dedicated Super Plus isolation base.

The Crossover

The crossover network is critical, since it must successfully integrate physically separate and different drivers into a coherent acoustic whole. This is no mean task, and the Reflection's crossover represents literally years of experimentation and research. Parts quality is high and includes such rarely seen elements as 12 gauge copper foil inductors, silver film and polypropylene oil filled capacitors, as well as premium, non-inductive resistors. The crossover network is isolated from the MB-1 enclosure, and mounted externally to avoid the compression and vibration problems which afflict crossover networks placed inside enclosures. Driver cabling is special quality, high purity copper wire.

The Reflection TLS

The Reflection TLS adds a transmission line subwoofer to the Reflection, extending low frequency response to 16 Hz. The construction of the TLS subwoofer is notable, since it incorporates isolation technology in both its wall construction and internal baffling, resulting in lower than usual "bleed-through" of enclosure wall-conducted internal noise. This contributes to the TLS' bass accuracy, control, and freedom from response anomalies. The subwoofer module fits into the space below the Reflection's midbass enclosure, and can be added to the Reflection at any time; a simple crossover network addition integrates the TLS module with the Reflection.

Reflection TLS Compound Isolation

An array of Rollerblock JR. HDSE ball bearing isolation units is secured to the underside of the Reflection's sealed enclosure. The combination of the HDSE Rollerblock isolation between the upper bass and subwoofer modules, and similar HDSE units under the floor platform creates Compound Isolation (multiple ball bearing isolation systems utilized in series), a patented technology of Symposium Acoustics. This further isolates the UMD and Upper Bass/Lower Midrange driver from the low frequency vibration from the TLS module. All three speaker elements - TLS module, Reflection midbass enclosure and UMD planar driver - are thus isolated from one other, minimizing intermodulation distortion and preserving the integrity of the individual drivers.

The TLS Crossover Network

The low pass network for the TLS module is contained in a recessed area just below the midbass enclosure, and an array of high quality capacitors are added to the top crossover network for the high pass section of the midbass/lower midrange enclosure. A "jumper" cable between the rear terminals of both enclosures allows a single speaker cable to be used. Bi-Wiring is easily accomplished by dispensing with the jumpers and connecting a separate speaker cable from the amplifier to each enclosure.

Product Details
Brand Symposium Acoustics
Condition Notes Brand New In Factory Sealed Packaging
Weight (lb) 175.0000
Height (In) 49
Width (In) 16
Length/Depth (In) 25
Weight (Kg) 80
Height (mm) 1244.6
Width (mm) 406.4
Length/Depth (mm) 635
  • Dimensions (HWD): 49x16x25 inches | 124x40.6x63.5 cm
  • Weight per side: Reflection, 125 pounds / 57 kG | Reflection TLS, 175 pounds / 80 kG
  • Efficiency: 90 dB
  • Recommended Amplifier power: 20-200 watts
  • Nominal Impedance: 8 ohms
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