•B-320+參考規格

無負回授設計

除了超額供應的電源與DMCD 技術，Densen 在電路上的另一個堅持便是無負回授設計。所謂負回授，是從擴大機的輸出端取一定量的訊號傳回輸入端，用處是修正訊號，降低失真，進而提升音質，而負回授的量並無固定，視各家設計而不同。但Densen 認為負回授並不會提升聲音表現，反而會壓縮動態範圍，損失細節，扭曲音場，減緩速度感，甚至影響透明度，所以Densen 絕不使用負回授設計。

機殼內部的SMD 表面黏著技術電路板也是Densen 一貫採用的方式。是因為SMD 比較便宜嗎？事實剛好相反。對於Hi-End 小廠來說，由於產量不可能太大，使用SMD 的成本一定更高，它是靠著老闆Thomas Sillensen 與SMD 廠的交情才得以降低成本。至於SMD 有什麼好處？電路板絕對乾淨，品質穩定，訊號路徑更短，以及耐用…等，都讓Densen 一直使用SMD。

The B-320PLUS is the successor to the critically acclaimed B-320 and is built directly on the B-320. The B-320 was the most sold Densen power amp ever. Now it has been tweaked and fine tuned to deliver an even more impressive performance. The B-320 contains an output stage built using Densen's unique DMCD technology. This makes the B-320PLUS extremely fast and precise, while retaining

unlimited control of the speakers that are connected. The bandwidth is also extreme and goes to 400.000Hz, resulting in improved slew-rate. This amplifier has - like any Densen amplifier - the capability to drive any loudspeaker on the market. The sound is fast, transparent and dynamic while still having the refinement of a true musical performer.

The B-320PLUS is built using surface mounting techniques and the components are mounted to a precision of 0.02mm using silver solder. All solderings are made in an artificial nitrogen athmosphere to avoid oxidation of the solderings. The power supply is massive and consists of a 800VA transformer, with a storage capacity of 100.000uF with 4 separate rectifiers, of which the 2 are capable of 3.000VA. Unusually for an amplifier, the capacitors are not all mounted in a capacitor bank; some are located next to the output stage for faster power delivery. All resistors are laser-trimmed Vishay metalfilm with a precision of 0.1%. As a special feature, the emitter resistors consist of twelve 0.1% metalfilm resistors in parallel (per output transistor = 96 resistors in total), ensuring no induction and, at the same time, a large surface for passing the substantial audio signals to the output terminals. Since they are in parallel, they actually have a much improved sonic signature compared to the conventional solution with a single resistor. The B-320PLUS delivers 2x100W at 8 ohm, and 2x200W in 4 ohm. The mains transformer is wound in a special way to lower the noise floor and actively function as a shielding transformer.

By using a new power supply set-up, the B-320PLUS also has an extremely "dark" background, which makes the amplifier sound extremely controlled, but still provides lots of emotion and spark.

No local or global feedback is one of the key issues with all Densen designs, including the B-320PLUS. This technology is now further improved with Densens new patent pending DMCD circuit. DMCD stands for Dense Mass Current Distribution, and by using the DMCD circuit, the current is at all times present at the output terminal. This results in an extremely low output impedance and a truely non-feedback amplifier.

The circuitry is manufactured as single ended all the way from the input terminal to the output stage.

The Printed circuit board is made of teflon and is doublesided, allowing the signal to be placed on one side and the groundplane on the other, thereby optimising interference free signal transfer.

The B-320PLUS contains several exciting features. On the backpanel there is an external switch to adjust the gain, so that the B-320 works perfectly with a traditional preamp, as well as with a CD-player with variable output.

There is also a D-Sub15 connector, allowing for DenLink connection to other Densen products, such as auto power on/off from a Densen preamp or integrated amp.

The output terminals are doubled for easy bi-wiring.

The B-320PLUS is also prepared for Densen’s SAXO electronic crossover, so that the B-320 can be used in active systems. This is done by mounting the crossover in an internal socket. The SAXO crossover is user adjustable and will fit all speakers on the market.

The B-320PLUS controls even extremely large speakers with ease, and it will definitely lead to a lot of people falling in love with music for the first time….and a lot of people falling in love with music for ever…

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