

N.02
In Production
Final chassis tweaks underway. Bit of a delay. First shipments now expected June 2023.
The differential path less traveled….transforming signal into great sound.
The circuit, internal design, and parts are the same as the DSHA-3F amplifiers that were produced by Doug for ecp Audio. (Yes, that includes the linear power supply!) What did we add? For your convenience, a single-ended RCA input and switch. What did we remove? Some space the orignal amp took up on your desk.
If your listening space has the blackest background (no power or signal noise), it enables you to hear the smallest reverberations and spatial details in your music. The differential topology of the DSHA-3FN avoids ground loops from sources and radio interference. The circuit phase-cancels internal noise and doesn’t feed back any distortion to the start of the circuit (no global feedback).
The highly regulated linear power supply feeds the circuit clean power. Since power is not derived from power supply capacitors, the signal does not pass through capacitor banks.
Each channel has a differential buffer tightly controlling each driver. Identical, but opposite signal phases start and stop each of your headphone drivers quickly and precisely. The lowest sub-bass keeps it's definition. Get all the impact, dynamism, and engagement out of your music.
Lundahl amorphous cobalt input transformers decouple noise from the source and negate the need for some capacitors in the signal path. Fine mid and high frequency signals pass through to your ears unobscured by noise from source, power supply, internal interference, or the unwanted vibrations of the drivers. There's no higher, odd-order harmonic distortion to make the treble etched or fatiguing.
The design and execution of the DSHA-3FN circuit leads to absence of background noise, high channel separation, low inter-modulation distortion, great squarewave response, excellent gain linearity over a large dynamic range, and an extended frequency range. A very low level, decreasing, 2nd order, even-harmonic series gives this amplifier the slightest tube-like touch...
We hope you enjoy your headphones and recordings in a way that you have never heard them before!
Topology | Unique fully differential, deep Class A | |
---|---|---|
Gain | 1.5x, ~4dB | |
Gain linearity | +/- 1 dB over TBD dB range | |
SNR | Greater than TBD dB | |
Bandwidth | DC to greater than TBD KHz | |
IMD | TBD | |
Residual noise | TBD | |
Crosstalk | TBD | |
Distortion | DSHA-3FN drives headphones such as HD6x0 & HD800 past listening levels with less than 0.05% distortion over the entire operational range. | |
Output impedance | TBD ohms | |
Size | 230mm W x 211mm D x 50.8mm H | |
Weight | TBD lb |