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The Audio Note (UK) DAC4.1x Digital to Analogue converters have been specifically engineered for sonic performance rather than technical specification, and fulfils all Audio Note (UK) Level 4 criteria: -
Pure Class A operation
Zero negative feedback
Single Ended circuit topology
Materials and component quality
Extensive research into the fundamental properties of the data stream itself have shown beyond doubt that, regardless of the theoretical advantages of the signal manipulation employed in our competitors products, such as higher over sampling, noise shaping, re-clocking or jitter reduction, these corrective measures greatly interfere with the critical time domain requirements of the signal..
Music is a time continuum from start to end which when broken is irreparably damaged, and no amount of clever manipulation can restore it to its original time / frequency / amplitude duration or relationship, regardless of what the theorists may tell you.
As a result, we have developed a way of excluding or bypassing all these corrective measures, to allow the conversion from digital to analogue to be done without any manipulation whatsoever. All we do is to reformat the data stream to allow the converter chip to be able to interpolate the incoming information correctly.
In other words, the Audio Note (UK) DAC4.1x has no over sampling, no jitter reduction, no noise shaping and no re-clocking. Having removed all of the digital filtering that is required for over sampling, all filtering is done in the analogue domain where it is easier to retain good, wide band phase-frequency and dynamically coherent behaviour. It uses the highest grade Analogue Devices AD1865, 18Bit stereo converter chip solely because we found it to be the best sounding available (yes, even better than the 20Bit versions!).
The filter-interface coils / transformers are of the highest possible quality, using 80% nickel Super mu-metal cores. The air gaps in the two filter coils per channel are matched across the full frequency range to within 0.1dB of each other, using a specially designed program to supplement an Audio Precision System 2 test rig.
The DAC4.1x Balanced features an upgraded version of the M6 Line pre-amplifier output stage, using the 5814a and 6463 double triode valves. This is coupled to an output transformer, wound with Audio Note (UK) copper wire on a High B C-core. With a 33:1 step-down ratio, this output transformer not only has exceptionally wide frequency response, but also just about the absolutely best dynamic transfer function possible. The analogue output has provisions for both unbalanced and balanced operation, using the best available quality RCA and XLR connectors.
The DAC4.1x Balanced Signature features an upgraded version of the M6 Line pre-amplifier output stage, using a pair of 5687 double triode valves. This is coupled to an output transformer, wound with Audio Note (UK) copper wire on a High B Ccore. With a 33:1 step-down ratio, this output transformer not only has exceptionally wide frequency response, but also just about the absolutely best dynamic transfer function possible. The analogue output has provisions for both unbalanced and balanced operation, using the best available quality RCA and XLR connectors.
To power this spectacularly revealing arrangement, we have incorporated a dual channel power supply with double choke filtering and valve rectification. This technique not only provides excellent isolation between the digital circuitry and power supply, but also provides well-isolated short and clean analogue signal paths. The digital power supply is an exceptionally low noise, shunt-type.
Internal component quality of this calibre has never before been seen, in either consumer or professional equipment. There is an abundance of Audio Note (UK) capacitors, and Audio Note (UK) Tantalum film resistors throughout the circuit. Analogue stage filter inductors and internal wiring are all produced with Audio Note (UK) wire.
All orders are processed within 48 hours from date of order.
We offer Free Ground Shipping on all orders regardless of size.
- If you would like to receive your order quicker you can request Express shipping during Check-Out in the Comments section. Additional charges will apply.
- In-stock items are shipped from our Vancouver warehouse and will reach major Canadian cities in 5-7 business days.
- Items not in stock will either ship from one of our manufacturer partners' warehouses or in rare cases first must be sent to Vancouver and then to you.
- If the expected arrival to you will be more than 7 business days you will be notified by email and at that point you will have the option to proceed or if you cannot wait then order can be cancelled.
We will gladly:
- (a) exchange a product that is not special ordered, or shipped from one of our partner warehouses, for a new product of equal value (product purchased must be unopened)
- (b) exchange a product if it is defective or damaged for the same product
within 15 days after the product has been delivered to you.
Returns for refund are not accepted.
For an exchange, you must notify us by email at firstname.lastname@example.org. We will acknowledge receipt of your email by reply and assist you in returning the product as identified below. Make sure to send and have your return package post marked within the 15 days after the product has been delivered to you.
- Headphones may not be returned or exchanged for any reason, only defective units will be replaced for the same model
- Items that have been opened may not be returned
Notwithstanding the foregoing, you may cancel an order if the product is not delivered to the delivery address on your order form within 30 days of the date your order is accepted.
To cancel, you must notify us by email at email@example.com. We will acknowledge receipt of your email and process the cancellation.
Products returning for exchange must be unused and in their sealed, original factory packaging.
Buyer is responsible for return shipping costs.