Nordstrand Bass Onboard Preamp 前級電路 – 音色清晰、動態豐富、升級首選

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Nordstrand 不只是在Pickup上有豐富的經驗,針對Bass的低頻特性還有自家的Pickup設計出一系列Onboard Preamp,Nordstrand 在EQ的線路及頻率增益下了很多功夫,把Pickup傳送出的訊號完整精確表達,透過Carey Nordstrand多年的實驗改良,將原本的音色韻味高度還原,音色動態細節更清晰呈現,總體音色變得更加好聽! 功能性設計上,針對Bass手的專業需求提供不同的選項: Active/Passive 切換,中頻點切換,高中低頻&Balance提供更細微的調整,成為許多 high end Bass品牌愛用的前級品牌,線路簡潔、安裝容易,也是許多工房為Bass音色升級的第一選擇。

 

2006 年,Carey Nordstrand 憑藉其非凡的才華設計了自家的 Onboard preamp,遵循以下的設計重點:

  1. 首先,Carey 使用最簡單的拓撲設計了電路,達成低雜訊、低噪音、透明度和音樂性的設計目標。
  2. EQ 頻率點的選擇參考了公認的業界標準,我們想要非常實用的頻率,針對最廣泛的應用而設計,而且是敏銳、簡單的設計,可以很簡單的做到精確的音色調整。
  3. Carey 認為有必要隨時準備好額外的增益。為此,我們在電路板上設計小型 trim pot,可提供高達 15dB 的增益: 設置為 0 時,將提供 unity gain,這意味著 EQ 設置為 0 時,輸入將等於輸出。在主動和被動設置之間的音量就可以完全均衡。
  4. 對於 3-band 的中頻(mid),我們希望提供可選擇的頻率,從中低頻到中高頻。在安裝過程中可安裝特定的電容,範圍從 200Hz ~1kHz 的頻率,以 100Hz 為單位增減。可以精確地彰顯琴的中頻特性,出廠預設為 400Hz 和 1kHz,我們發現這兩個頻率對於cut/boost 是很有效果的。
  5. Nordstrand 提供預先焊接完成的版本 (pre-wired),大多數的型號都包括 tone 旋鈕。Carey 認為這是在Bass上最有用的功能之一,即使是主動模式下,它也是很棒的功能,可以快速複刻復古風格的音色。

 

2B 系列(2段EQ: Bass/Treble)

  • 2B (未焊接版本) – 2 band bass preamp with 2 eq pots
  • 2B-4a – (4顆旋鈕) – 2 band bass preamp with volume (pull passive)/volume/bass/treble
  • 2B-4b – (4顆旋鈕) – 2 band bass preamp with volume (pull passive)/blend/treble/bass
  • 2B-3a – (3顆旋鈕) – 2 band bass preamp with volume (pull passive)/treble/bass
  • 2B-3b – (3顆旋鈕) – 2 band bass preamp with volume (pull passive)/blend/treble on bass (雙層)
  • 2B-4c – (4顆旋鈕) – 2 band bass preamp with volume (pull passive)/blend/tone/treble on bass (雙層)
  • 頻率/增益
    • 總增益(gain) 0~15db 由電路上的可變電阻調整
    • Bass +/- 12db @ 50Hz
    • Treble +/- 12db @ 4khz
  • 所有預焊的型號有附Input Jack及電池扣

 

2B+ 系列 (2段EQ: Bass/Treble, Boost Only)

  • 2B+ (未焊接版本)– 2 band bass preamp with 2 eq pots.
  • 2B+4a – (4顆旋鈕) – 2 band bass preamp with volume (pull passive)/volume/bass/treble.
  • 2B+4b – (4顆旋鈕) – 2 band bass preamp with volume (pull passive)/blend/treble/bass.
  • 2B+3a – (3顆旋鈕) – 2 band bass preamp with volume (pull passive)/treble/bass.
  • 2B+3b – (3顆旋鈕) – 2 band bass preamp with volume (pull passive)/blend/treble on bass (雙層)
  • 2B+4c – (4顆旋鈕) – 2 band bass preamp with volume (pull passive)/blend/tone/treble on bass (雙層)
  • 頻率/增益
    • 總增益(gain) 0~15db 由電路上的可變電阻調整
    • Bass +/- 12db @ 50Hz
    • Treble +/- 12db @ 4khz
  • 所有預焊的型號有附Input Jack及電池扣

 

3B 系列 (三段EQ: Bass/Mid/Treble)

  • 3B(未焊接版本) – 3 band bass preamp with 3 eq pots
  • 3B-5a – (5顆旋鈕) – 3 band bass preamp with volume (pull passive)/blend/treble/mid (pull frequency switch 1k/400 hz) /bass
  • 3B-5b – (5顆旋鈕) – 3 band bass preamp with volume (pull passive)/blend/tone/mid (push pull frequency selector 1k/400 hz)/ treble and bass (雙層)
  • 3B-4a – (4顆旋鈕) – 3 band bass preamp with volume/volume (雙層)/tone (pull passive)/mid (pull frequency switch 1k/400 hz)/ treble and bass (雙層)
  • 3B-4b – (4顆旋鈕) – 3 band bass preamp with volume/tone (雙層)/blend/mid (pull frequency switch 1k/400 hz)/treble and bass(雙層)
  • JC-3b – (預焊) – (與Big Blademan 拾音器搭配會有最佳效果) 3 band bass preamp with volume (pull passive)/blend/treble (push/pull neck pickup – series down, parallel up)/mids (1kHz down, pull up for 400Hz)/bass (push/pull bridge pickup – series down, parallel up)
  • 頻率/增益
    • 總增益(gain) 0~15db 由電路上的可變電阻調整
    • Bass +/- 12db @ 50Hz
    • Treble +/- 12db @ 4khz
    • Midrange +/- 12db @ 1k (push/pull 400hz)
  • 所有預先焊接的型號有附Input Jack及電池扣

2b-4a – Volume (PP active/passive), Volume,  Treble, Bass

2b-4b – Volume (PP active/passive), Blend,  Treble, Bass

2b-4c – Volume (PP active/passive), Blend, Tone, Treble/Bass Stack

2b-3a – Volume (PP active/passive), Treble, Bass

2b-3b – Volume (PP active/passive), Blend,  Treble/Bass Stack

2b-MM – Volume – Treble – Bass

2b+ Master – Volume (PP active/passive), Volume, Treble, Bass, Tone

2b+4a – Volume (PP active/passive), Volume,  Treble, Bass

2b+4b – Volume (PP active/passive), Blend,  Treble, Bass

2b+4c – Volume (PP active/passive), Blend, Tone, Treble/Bass Stack

2b+3a – Volume (PP active/passive), Treble, Bass

2b+3b – Volume (PP active/passive), Blend,  Treble/Bass Stack

 

3b-3 –  Volume (PP active/passive), Mid (PP frequency select), Treble/Bass Stack

3b-4a – Volume/Volume Stack, Tone (PP active/passive), Mid (PP frequency select), Treble/Bass Stack

3b-4b  – Volume/Tone Stack, Blend, Mid (PP frequency select), Treble/Bass Stack

3b-5a – Volume (PP active/passive), Blend, Treble, Mid (PP frequency select), Bass

3b-5b – Volume (PP active/passive), Blend, Tone,  Mid (PP frequency select), Treble/Bass Stack

JC-3b – Volume (pull passive), Blend, Treble (push/pull neck pickup – series down, parallel up), Mids (1kHz down, pull up for 400Hz), Bass (push/pull bridge pickup – series down, parallel up)

3B Fixed Mid – For players who do not want a mid selector switch.  There are several frequencies to fix the mid at.