“We have designed our flagship amplifier the HAL-350 from the ground up incorporating a minimalist design philosophy using a synergy of high quality components all individually matched and tuned together as one.”
Teamed with an Exceptional build quality to create a truely dynamic amplifier. Working tirelessly to perfect the synergy to create a truely exception listening experience.
Packed with 350 watts per channel at 8 ohms ( 600 watts per channel – 4 ohms) there is more grunt than you will ever need. With a range of inputs including Aux (RCA), Optical, Coax and USB. Paired with the Bluetooth Remote Control App for use on your smart phone or tablet (iOS and android) you have everything at your fingertips.
Another key element which sets our amplifier apart from the rest is the integrated DAC. This approach eliminates any DAC miss-match which is a common flaw in many systems. As such we have created a truely exceptional high-end amplifier which is unequalled in it’s field. Through simplicity of design and sophistication of execution, we have ensured every component has been optimised to deliver a ‘sound experience’. It is a beautiful piece of engineering.
The Heschl HAL350 effortlessly drives the most demanding loudspeakers to musical nirvana, be the performance full scale orchestra, high-decibel rock band or string quartet. Exhaustive listening tests at the component and circuit level and not myopic focus on specifications have informed the development of this amplifier. We are proud of the end result.
- Continuous output power (ref. 2Hz – 250kHz) – 8 ohms — ≥350W
- Continuous output power (ref. 2Hz – 250kHz) – 4 ohms — ≥600W
- IHF Dynamic power – 8 ohms — ≥350W
- IHF Dynamic power – 4 ohms — ≥600W
- 2 ohms stable
- Maximum output current — >18A
The Heschl HAL350 incorporates a custom DAC module based on a discrete R-2R sign magnitude DAC design, with FPGA based FIFO buffering/reclocking and custom digital filters, < 1 ps jitter clock generator, with 28-bit resolution so there is headroom, oversampling up to 3.072 Mhz. Up to 24 bit / 384 Khz input from TOSLINK, SPDIF, and USB (via USB to I2S interface board), with isolation on the I2S interface. The DAC has a low jitter digital controlled oscillator, data is sent though a short FIFO and the FPGA and uC work together to measure incoming bitrate and adjust clock as needed, basically a digital PLL with very fast lock and very slow filtering. So, the DAC itself only need serial data, word clock and bit clock, no master clock is needed, it will sync to whatever you feed it.
- USB input up to 384KHz sample rate
- SPDIF and TOSLINK input up to 192KHz
- Automatic De-emphasis for 44.1KHz material
- Built-in set of simple FIR filters for all sample rates
- THD @ -1 dB output = 0.008%
- S/N 20Khz Bandwidth = 127 dB Unweighted
Digital USB input
- Computer (USB Type B) — 24 bit/96 kHz PCM content from PC or MAC up to 384 kHz sample rate
Digital Optical/Coaxial input
- Input impedance – Coaxial — 75 ohms Input
- Frequency response — ±0.5dB (ref. 20Hz – 96kHz @192kHz)
- Input impedance — 5 KOhm
- Normal operation — 1600W (ref. 100 – 240V AC 50/60 Hz)
- Standby power — <0.5W
- Idle power — 100 W
Weight & Dimensions
- Unit Dimensions (W x H x D) — 435 x 250 x 408 mm (Gross)
- Net Weight — 38.5 kg (this is one hell of a beast)