Stereophile天書40週年世界百大器材裏 第75名 : SPICA TC-50 喇叭筆記
SPICA TC-50 喇叭筆記
最近購得的SPICA TC-50,這是最早的相位一致型的喇叭。
低音6.5吋 高40.5公分深29.5公分寬33.5公分
最早是在1983開發出來為美國的John Bau,2000後就不再見到這家傳奇喇叭的身影。所以市場上是見一對少一對,這樣狀況良好的喇叭已經很少見了。前一代是SC-50 1979年,TC-50約1983年推出,1988年TC-50i,後繼是TC-60喇叭 1994年。
(Stereophile天書40週年 評選世界百大器材裏的第75名 : Spica的 TC-50 喇叭)
Stereophile the Hot 100 Products, No. 75: Spica TC-50 loudspeaker。
引用
https://spicaspeakers.com/specifications/spica-tc-50-datasheet.php#gsc.tab=0
這裏說設計師 John Bau 突破了當時可用工具的極限,創造出卓越品質的超越時間的設計。
The TC-50 is a deceptively simple two-way loudspeaker based on a 6-1/2 inch acoustically suspended woofer and a 1 inch dome type tweeter. Its crossover network is truly state-of-the-art, in parts quality, circuit layout and, of course, design. The compact speaker is the result of exhaustive research and the latest technology in computer assisted optimization. Designer John Bau had indeed pushed the limits with tools available for the period, creating a time-aligned design with remarkable imaging qualities. Close tolerances were maintained during production and units were serialized to ensure a optimal left/right matching.
規格 Specifications:
Released: 1983, est. 20,000 total sold (post) approx 7,500 TC-50's / 12,500 TC-50i
Description: Two-way, stand-mounted loudspeaker.
Drive-units: 1" soft-dome tweeter, 6.5" pulp-cone woofer.
Low-frequency alignment: sealed-box Q=0.78.
Crossover frequency: 2kHz.
Crossover: high-pass slope, approximately first-order, 6dB/octave; low-pass slope, fourth-order, 24dB/octave, Bessel; both drivers connected with the same polarity.
Frequency response: 60Hz-17kHz (-3dB).
Sensitivity: 84dB/W/m.
Nominal impedance: 4 ohms (3.6 ohms min. at 4kHz).
Amplifier requirements: 25-100W.
Maximum power handling: 50W continuous, 100W peak.
Dimensions: 15.5" (394mm) H x 13" (330mm) W x 11.6" (295mm) D
Weight: 20 lbs (9.07 kg) each.
Price: $420/pair (1984) / $450/pair (1986-1988); $550/pair in oak or walnut
當年台幣跟美金匯率約1:40 所以當時這對喇叭在台灣的售價大約是2萬台幣左右。最後SPICA被Parasound於1993年收購。
引用
https://spicaspeakers.com/repair/tc-50-crossover.php#gsc.tab=0
1988年後出的TC50i是因為 Audax (FR) / Polydax (US) 單體停產後,必需出的調整。
年份表:
TC50的分音器及電路圖:
Type | Qty | TC-50 Schematic | Qty | TC-50i Schematic |
Elect. Cap. 50V | C1 | 4.7 ufd | C1 | same |
Elect. Cap. 50V | C2 | 4.7 ufd | C2 | same |
Elect. Cap. 50V | C8 | 4.7 ufd | C8 | same |
Mylar 50V | C3 | 0.22 ufd | C3 | 0.1 ufd |
Elect. Cap. 50V | C4 | 33 ufd | C4 | 40 ufd |
Mylar 50V | C5 | 0.33 ufd | C5 | 0.22 ufd |
Mylar 50V | C6 | 0.33 ufd | C6 | 0.22 ufd |
Elect. Cap. 50V | C7 | 3.1 ufd | C7 | same |
Mylar 50V | C9 | 0.1 ufd | C9 | 0.22 ufd |
Metal Film 1/2 watt | R1 | 1 Ohm | R1 | 2 Ohm |
Metal Film 1/2 watt | R2 | 1 Ohm | R2 | 4.1 Ohm |
Metal Film 1/2 watt | R3 | 1 Ohm | R3 | 2.7 Ohm |
Inductor | L1 | 1.02 mH 0.23 Ohm | L1 | same |
Inductor | L2 | 0.778 mH 0.23 Ohm | L2 | same |
Inductor | L3 | 0.353 mH 0.11 Ohm | L3 | same |
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