感謝比爾蓋茲音響溫先生提供Tannoy各代單體,讓站長有機會了解各代Tannoy 15"單體的特性,也可以將這些參數和網路上找到的做個比較,站長比較常參考的是http://44bx.com/tannoy/Tannoy_ts.html

 

Tannoy Silver 15"

由於單體價值不菲,站長僅測試散裝的一支,Silver高音沒有防塵罩,所以無法以外加重量測試效率,這支silver單體的測試結果和44bx網站公佈的差很多。

 ______________________________________________________
 
  Qts =  1.398   Total Q                  
  Qes =  1.848   Electrical Q             
  Qms =  5.746   Mechanical Q             
  Fs =   42.658  Hertz, Free Air Resonance
  Re =   10.39   Ohms, DC resistance      
  Ls =   2.486m  H, series inductance     
  Lp =   2.817m  H, lossy series inductance
  Rp =   20.79   Ohms, loss across Lp     
  Dia =  310m    meters, effective        
 
  ______________________________________________________
 

Tannoy Red 15"

溫先生提供序號接近的一對供測試,兩支單體特性天差地遠,跟44bx網站公佈的數據也八竿子打不著。

單體一

______________________________________________________
 
  Qts =         0.972   Total Q                     
  Qes =         1.134   Electrical Q                
  Qms =         6.823   Mechanical Q                
  Fs =          62.744  Hertz, Free Air Resonance   
  Re =          10.82   Ohms, DC resistance         
  Ls =          1.804m  H, series inductance        
  Lp =          2.513m  H, lossy series inductance  
  Rp =          26.33   Ohms, loss across Lp        
  Dia =         310m    meters, effective           
  (%shift)      26.1    %, resonance with mass      
  Vas =         48.22   litres, air volume equivalent
  mms =         106.7   grams, effective mass       
  cms =         60.27u  m/N, compliance             
  bl =          20.04   T*m, motor strength         
  n0 =          1.010   %, max efficiency           
  SplSens =     92.04   dBSPL max @1W absorbed      
  (Added mass)  90      grams                       
 
  ______________________________________________________

 

單體二

  ______________________________________________________
 
  Qts =  1.443   Total Q                  
  Qes =  1.788   Electrical Q             
  Qms =  7.480   Mechanical Q             
  Fs =   85.484  Hertz, Free Air Resonance
  Re =   10.53   Ohms, DC resistance      
  Ls =   1.712m  H, series inductance     
  Lp =   2.291m  H, lossy series inductance
  Rp =   24.83   Ohms, loss across Lp     
  Dia =  310m    meters, effective        
 
  ______________________________________________________
 

Tannoy Gold 15"

溫先生同樣提供一對序號接近的供測試,毫不意外的兩支單體特性也是相去很遠,單體二與44bx網站公佈的測試數據比較接近。這對單體若是裝在設計良好的喇叭箱內,大致可以維持平衡的頻率響應。

單體一

______________________________________________________
 
  Qts =         0.628   Total Q                     
  Qes =         0.712   Electrical Q                
  Qms =         5.318   Mechanical Q                
  Fs =          39.062  Hertz, Free Air Resonance   
  Re =          5.245   Ohms, DC resistance         
  Ls =          1.232m  H, series inductance        
  Lp =          1.388m  H, lossy series inductance  
  Rp =          13.95   Ohms, loss across Lp        
  Dia =         310m    meters, effective           
  (%shift)      31.6    %, resonance with mass      
  Vas =         169.8   litres, air volume equivalent
  mms =         78.21   grams, effective mass       
  cms =         212.2u  m/N, compliance             
  bl =          11.89   T*m, motor strength         
  n0 =          1.366   %, max efficiency           
  SplSens =     93.35   dBSPL max @1W absorbed      
  (Added mass)  90      grams                       
 
  ______________________________________________________

單體二

  ______________________________________________________
 
  Qts =         0.312   Total Q                     
  Qes =         0.338   Electrical Q                
  Qms =         4.048   Mechanical Q                
  Fs =          27.291  Hertz, Free Air Resonance   
  Re =          6.422   Ohms, DC resistance         
  Ls =          1.463m  H, series inductance        
  Lp =          1.817m  H, lossy series inductance  
  Rp =          18.31   Ohms, loss across Lp        
  Dia =         310m    meters, effective           
  (%shift)      28.1    %, resonance with mass      
  Vas =         285.8   litres, air volume equivalent
  mms =         95.19   grams, effective mass       
  cms =         357.2u  m/N, compliance             
  bl =          17.60   T*m, motor strength         
  n0 =          1.651   %, max efficiency           
  SplSens =     94.17   dBSPL max @1W absorbed      
  (Added mass)  90      grams                       
 
  ______________________________________________________
 

Tannoy HPD385

溫先生同樣提供一對序號接近的供測試,這對單體比站長手上的這對稍微對稱一點,不過也是五十步和一百步的分別而以。

單體一

______________________________________________________
 
  Qts =         0.294   Total Q                     
  Qes =         0.306   Electrical Q                
  Qms =         8.114   Mechanical Q                
  Fs =          16.580  Hertz, Free Air Resonance   
  Re =          6.252   Ohms, DC resistance         
  Ls =          1.206m  H, series inductance        
  Lp =          1.439m  H, lossy series inductance  
  Rp =          12.27   Ohms, loss across Lp        
  Dia =         310m    meters, effective           
  (%shift)      29.3    %, resonance with mass      
  Vas =         829.9   litres, air volume equivalent
  mms =         88.82   grams, effective mass       
  cms =         1.037m  m/N, compliance             
  bl =          13.76   T*m, motor strength         
  n0 =          1.190   %, max efficiency           
  SplSens =     92.75   dBSPL max @1W absorbed      
  (Added mass)  90      grams               

  ______________________________________________________

 

單體二

 ______________________________________________________
 
  Qts =         0.314   Total Q                     
  Qes =         0.326   Electrical Q                
  Qms =         9.026   Mechanical Q                
  Fs =          16.111  Hertz, Free Air Resonance   
  Re =          6.810   Ohms, DC resistance         
  Ls =          1.158m  H, series inductance        
  Lp =          1.499m  H, lossy series inductance  
  Rp =          10.92   Ohms, loss across Lp        
  Dia =         310m    meters, effective           
  (%shift)      23.1    %, resonance with mass      
  Vas =         607.3   litres, air volume equivalent
  mms =         128.5   grams, effective mass       
  cms =         759.0u  m/N, compliance             
  bl =          16.49   T*m, motor strength         
  n0 =          749.7m  %, max efficiency           
  SplSens =     90.74   dBSPL max @1W absorbed      
  (Added mass)  90      grams                       
 
  ______________________________________________________
 

測試完所有單體後,不難發現Tannoy的老單體特性差異很大,猜想當初出廠的公差就是這樣吧。畢竟Thiel-Small model是在1972年左右才問世的,比這些老單體問世的時間晚了不少,中間又過了幾年才廣為大眾接受。至於配對到底重不重要,站長我是覺得不要差太多尚可接受。人耳是很奇怪的東西,它對絕對的頻率響應並不敏感,但對兩種聲音間細微的差異卻很容易分辨出來。因此立體聲不對稱,很容易就能聽出來。問題是,這年頭要找一對品像漂亮,序號接近的老Tannoy已經不容易了,再強求配對,可能真的要靠緣分了。