This is an immaculate piece that has no scratches or marring of any kind. It has the stock op amps as well as dual OPA2604 and single OPA827's, which are installed. The new op amps made everything tonally more dense and improved the bass.
On the tube side, I do not have the original stock tube but have an NOS for it. The tube was removed anyway on the advice found on the internet of Bill O'Connell. Mr O'Connell stated this would improve the performance by about 30%. Mr O'Connell works for the Distributor of the MINI MAX Plus (Morningstar Audio Imports)
From the Morningstar website.
Since the introduction of the MiniMax DAC many customers and reviewers alike have been raving about the sound quality that is now being heard through their audio systems. What Alex Yeung has done to an already outstanding digital to analog converter is only to make a better one. After one listen, you will confirm that he has created another masterpiece in the audio world of reproduction of the digital signal. The whole DAC Plus has a brand new design of the PCB which took months to perfect after many configurations were tried.
The USB is now Async to handle 24bit 192KHz signal. Alex incorporated dual separate power transformers for both the digital and analog sections resulting in a robust power supply that is easily audible as superb transformers were used in the design. He fine-tuned both the tube output stage and the power supply in comparison to the original DAC. High speed relays/resistors were used for the input signal module. The volume control has been removed with both Tube output and Solid State output now having equal voltages at 2.5V. The result just has to be heard. It will astonish your aural senses with delight.
Features and Specifications:
Sabre ES9018 DAC chips
Separate Power Transformers for digital and analog sections
Inputs : AES/EBU, BNC, RCA, OPTICAL and USB
M2Tech OEM 24bit 192KHz Async USB input
Tube and solid state output selectable
Phase In/Out selectable
Sampling rates : 16-32bit 32KHz - 192KHz
Frequency Response: 10Hz-40KHz
THD : 0.2%(Tube) 0.02%(Solid State)
Dynamic Range: 135dB
Note: No volume control.
ADDED INFORMATION I FOUND ON THE WEB:
improved signal input section with high frequency relays/resistors module
Socketed output op amps (for op amp rolling, YOU CAN EVEN ADD DEXA OR BURSON DISCRETE OP AMPS
improved S/N level
Frequency Response : 10Hz – 40KHz
Sampling rates : 16-32bit 32KHz - 192KHz
Dynamic Range : 135dB
Digital Input Impedance : 75 ohm
Power Consumption : 14W
Main Voltage : 120V, 230V, 240V switchable
PAY PAL ADDS 3.00% TO THE TOTAL COST.
SHIPPING BY FEDEX IN CONUS (USA ONLY) WILL BE AT A FLAT RATE OF $20.00 (DOUBLE BOXED)
CHECK MY 100% POSITIVE FEEDBACK ON AUDIOGON AND EBAY (SAME USERNAME).
BID WITH CONFIDENCE.
FROM THE EEAUDIO (DOT) COM WEB SITE:
We are pleased to announce the launch of the new Eastern Electric MiniMax DAC Plus. It is the supreme upgrade version of the awarding winning Mini Max DAC. The MiniMax DAC Plus goes far beyond what made the original MiniMax DAC so special.
The core D/A chip of the MiniMax DAC Plus uses the world best sounding Sabre ESS Technology 9018 32 bit DAC chip. It zero jitter feature eliminates the discussion that digital has a long way to go before it can ever become the standard against analog playback. The USB input is Italian M2Tech OEM Asyncronization 24bit 192KHz. The MiniMax DAC Plus incoporates Eastern Electric’s world class leading tube anaglog output stage, it reproduces the finest and silkiest sound from any high resolution file of your CAS. We consider this MiniMax DAC Plus to be the State Of The Art digital format by which others will be judge to in comparison. That we can bring it to you at an affordable price point is our gift to the audio community.
Highlights of the MiniMax Vacuum Tube DAC Plus
• Sabre ES9018 DAC chips
• Separate Power Transformers for digital and analog sections
• Inputs : AES/EBU, BNC, RCA, OPTICAL and USB
• M2Tech OEM 24bit 192KHz Async USB input
• Tube and solid state output selectable
• Phase In/Out selectable
• Sampling rates : 16-32bit 32KHz - 192KHz
Windows Xp Driver Download
Windows 7 Driver Download
Mac Driver Download
10.4 Tiger Download
10.5 Leopard Download
10.6 Snow Leopard Download