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The CS3 is time-aligned, phase-coherent (footnote 1), actively equalized to extend the low-end response, and designed for an unusually uniform impedance characteristic. As can be seen from the photograph, the enclosure is tapered and the edges rounded off. The taper provides the back-to-front offset for the drivers (to accomplish the time-alignment), and the rounding-off minimizes the effects of cabinet edge diffraction.
Also worthy of note is the…
The CS3 has quite remarkable…
JGH has not discussed the question of equipment compatibility, which is particularly important with the CS3s. I had a bit of experience in this area.
The CS3 goes both lower and higher than most other speaker systems, and will show up problems in those areas (eg, below 40Hz and above 16kHz) that aren't apparent on other systems. A tube preamp, for instance, that worked very well with the Spica TC-50 sounded terrible with the CS3; low bass such as kickdrum was simply unlistenable. Another place to watch out for is the high end.…
Description: Three-way, floorstanding loudspeaker with active low-frequency equalization. Frequency response: 24Hz–20kHz ±1.5dB. Power bandwidth: 22Hz–22kHz, –3dB. Sensitivity: 89dB/w/m. Impedance: 4 ohms ±10% above 70Hz; below 70Hz there is a gradual rise to 7 ohms. Recommended amplifier power: 40–250W.
Dimensions: 13" W by 13" D by 41" H. Weight: 75 lbs.
Price: $1950/pair (1984); no longer available (2008).
Manufacturer: Thiel Audio Products Company, 1026 Nandino Boulevard, Lexington, KY 40511. Tel: (859) 254-9427. Fax: (859) 254-0075. Web: www.…
Which brings me to the subject of this review. In a world that seems to…
Description: Full-function, tubed preamplifier with five line-level inputs, two tape loops, and one phono input. Tube complement: 2x12AX7, 3x5751, 2x5965. Frequency range: 2Hz–100kHz. RIAA error: ±0.25dB. Input impedance: 47k ohms in parallel with 100pF (phono), 47k ohms (line). Output impedance: less than 200 ohms (main). Phono stage gain: 47dB. Line stage gain: 31dB (polarity-inverting). Rated output level: 2.5V (20V peak maximum). Phono overload: greater than 200mV at 1kHz. Distortion: THD less than 0.25%, IMD less than 0.25%. S/N ratio (20Hz–20kHz): 77dB ref…
The most relevant measurement of a phono preamplifier, in my opinion, is the accuracy of its RIAA de-emphasis. Fig.1 shows that for the PV9. It can be seen to be commendably flat across the entire audio band, or at least within the tolerance of my inverse-RIAA network, gently rolling off above 16kHz and below 16Hz. The 1kHz squarewave of the PV9's RIAA stage is shown in fig.2, the flat top implying good LF extension, and the lack of overshoot, fast risetime, and square corners indicating a flat, extended HF response. The line stage, too, was effectively flat, with…