Spendor D7.2 - 2nd Gen Speakers
Spendor LPZ (Linear Pressure Zone) tweeter
The goal of every tweeter designer is to achieve linear acoustic output across a wide frequency range; in practice this is extremely difficult. Spendor’s approach to this age-old challenge is radical, and it works. The Spendor LPZ tweeter is built around a stainless steel front plate that forms a damped acoustic chamber directly in from of a lightweight woven polyamide diaphragm. The front plate incorporates phase correcting micro foil to equalize sound wave path lengths across the diaphragm surface; simultaneously it generated a symmetrical pressure environment on both faces of the tweeter diaphragm so the tweeter operates in a balanced linear mode.
Imagine focusing an ultra-high quality camera lens until you see a bright, clear image. That’s the effect of LPZ technology. Our sequential geometry micro-foil operates as an acoustic lens. The result is perfect focus, uninhibited sound transmission and a very wide listening window. The front plate also provides excellent mechanical protection for the delicate tweeter dome and a smart modern appearance.
Spendor 18cm drive units developed for D7
The D7 mid-bass drive unit has an advanced EP77 polymer cone for superb clarity and vanishingly low colouration. The D7 low frequency drive unit has an ultra-rigid two part bonded Kevlar composite cone assembly for accurate powerful low frequency response. Both drivers feature cast magnesium alloy chassis, high efficiency motor systems, optimized electro-dynamic damping, and excellent thermal dissipation for wide dynamic range. A new polymer surround reduces driver ‘break-in’ time significantly due to the very stable molecular composition of the material.
Fifth generation Spendor Linear flow port technology
The benefits of Spendor Linear Flow port technology have been well proven in the Spendor A-line. The deliver deep articulate bass with natural timing, even in small rooms or close to a wall. Our new fifth generation Spendor Linear flow port incorporates and aerodynamically profiled central baffle (like an aircraft wing) to create a tapered twin-venturi port. Air at the port extremities is decelerated and there is a further reduction in air velocity in the large tapered area at the cabinet base. The result is evenly balanced acoustic pressure and airflow along the whole length of the port. Rapidly decreasing air velocity at the port extremities creates an air-curtain effect to eliminate port noise and spurious mid-band radiation.
Conventional loudspeakers incorporate low frequency enclosure damping. The damping material stores energy. As the stored energy is released it is no longer in-time with the music and it makes sound unnaturally heavy and slow. The sound path, within the D7 cabinet, from the bass drivers to the listening room, requires no low frequency damping. The Spendor D7 is entirely free from energy storage effects and the advantage is clearly audible; music sounds naturally fast, agile, and coherent.
High quality terminals are recessed within the port aperture to hide plug and cable connections for neat appearance
Spendor Dynamic cabinet damping
Timing is fundamental to the musical experience. In conventional loudspeakers rigid high-density cabinet panels are mass-damped to reduce cabinet-talk. Spurious energy is stored and released slowly. This introduces unacceptable blurring and slowing of the sound. Spendor’s solution is asymmetric aperture bracing of the cabinet to disperse internal waves. Dynamic Damping with small, low-mass constrained polymer dampers at key energy interface points instantly convert any spurious energy in the cabinet into inaudible heat. The result is a silent, rigid cabinet and naturally fast engaging sound.
Description: 2.5 way floor standing loudspeaker
Enclosure type: Rigid, asymmetric braced, vented cabinet with dynamic damping
Vent type: Fifth generation Spendor linear flow, tapered twin-venturi port
Input connection: Single pair recessed precision binding posts
Typical in-room response: 29Hz – 25kHz
Power handling: 200 watts unclipped programme
Sensitivity: 90dB for 1 watt at 1 metre
Nominal impedance: 8 Ohms
HF driver: Spendor 22mm LPZ polyamide dome
Bass/mid driver: Spendor 18cm EP77 polymer cone
Lower bass driver: Spendor 18cm Kevlar composite cone
Crossover frequencies: 900Hz, 3.2kHz
Net weight: 21kg
Height: 950mm (excluding spikes)
Width: Cabinet 192mm, plinth 204mm
Depth: Cabinet 320mm, plinth 344mm
Accessories: Height adjustable spike feet, grille, non-slip polymer feet