MHDT Lab Havana DAC upgraded to AD1865 DAC chip. Top metal cover modified to allow the use of a 6SN7 tube with adaptor. Can also use a 6922 tube with adaptor, or 5670 tube without adaptor. Specifications: Input Capacity USB (Max) - 16bits/48kHz, Input Capacity SPDIF (Max) - 24bits/96kHz, Output Format - 16 bit, Digital Receiver Chip - CS8414, USB Chip - CM102AS+, DAC Chip - PCM56P-J changed to AD1865, DAC Chip Construction - R/2R Multi Bits, I/V Stage - Voltage out DACs Internal OPAMP, Tube Buffer, Output level - 2.6V, Output impedance - 32 ohms, Inputs Available - 3 Inputs - USB / RCA / Optical, USB Input Topology - USB 1.0, USB Driver for Win XP/W7/W8/W10 - Not Needed, USB Driver for Linux/Mac, Dimensions clear (WxDXH) - 260X150X60, Dimensions w/ socket - 280X170X60, Weight - 1.8kg, Original PCM56P-J chips and four tubes included: Electro-Harmonix 6SN7, Tung-Sol 6SN7, JJ 6386LGP, Philips ECG 6922. All tubes have low hours on them. Optical connector slightly loose but works perfectly.

MHDT Lab Havana DAC upgraded to AD1865 DAC chip. Top metal cover modified to allow the use of a 6SN7 tube with adaptor. Can also use a 6922 tube with adaptor, or 5670 tube without adaptor. Specifications: Input Capacity USB (Max) - 16bits/48kHz, Input Capacity SPDIF (Max) - 24bits/96kHz, Output Format - 16 bit, Digital Receiver Chip - CS8414, USB Chip - CM102AS+, DAC Chip - PCM56P-J changed to AD1865, DAC Chip Construction - R/2R Multi Bits, I/V Stage - Voltage out DACs Internal OPAMP, Tube Buffer, Output level - 2.6V, Output impedance - 32 ohms, Inputs Available - 3 Inputs - USB / RCA / Optical, USB Input Topology - USB 1.0, USB Driver for Win XP/W7/W8/W10 - Not Needed, USB Driver for Linux/Mac, Dimensions clear (WxDXH) - 260X150X60, Dimensions w/ socket - 280X170X60, Weight - 1.8kg, Original PCM56P-J chips and four tubes included: Electro-Harmonix 6SN7, Tung-Sol 6SN7, JJ 6386LGP, Philips ECG 6922. All tubes have low hours on them. Optical connector slightly loose but works perfectly.