Naim DAC

[deepak]

No thread for the latest ladder DAC on Head-Case

I believe it does HDCD, looks like it does it through the custom DSP filter?

Naim Audio

# Chassis: The 3mm aluminium chassis and die cast fascia provide the fundamental structural rigidity necessary for low microphony.

# Printed Circuit Boards: Six layer glass fiber PCBs optimised for low microphony and high speed data transfer.

# Analogue Filters: Two Cascaded third order Sallen-Key active filters giving 36dB/Octave roll-off. Each stage incorporates Naim zero-feedback complimentary buffers.

# I to V Converters: Convert the current output of the digital to analogue converters to a voltage waveform ready for analogue filtering.

# DAC Chips: Burr Brown PCM1704K. A true multi-bit digital to analogue converter chip as used in the CD555.

# Re-clocking Gate: Re-clocks the data immediately before it enters the DAC chips to remove any influence from the isolation circuits.

# Crystal Sine-wave Oscillators: Crystal oscillators have lower signal correlated noise and phase noise than voltage controlled clocks. The DAC employs ten separately tuned oscillators.

# DSP to Analogue Electrical Isolation: Ensures that the high frequency noise of digital electronics cannot leak into the analogue output stages.

# SHARC DSP: Operates on the digital data to filter the out-of-band artifacts. 40bit, 16 times over-sampling topology.

# Blackfin DSP: Handles USB, controls the DAC and conditions the incoming USB data.

# Data RAM: Buffers the incoming S/PDIF data stream ready for re-clocking by the appropriate crystal oscillator.

# Low Noise Power Supply: Multi-regulated and smoothed power supply with separate outputs for each element.

[feckn_eejit]

Woah... Naim has forever been anti-separates (save for power supplies!) This is very cool... someone buy my D1!

[tyrion]

With any luck, Oz will get one for me to try. Not that I need a dac but I've always liked Naim gear. I would love to check out the HDX.

[n_maher]

The Naim DAC provides eight S/PDIF inputs, two USB inputs, and is capable of handling audio data sampled at up to 768kHz and with up to 32bit resolution.

Wut?

[deepak]

Wut?

One of them is in the front. Maybe if someone wants to come over with a laptop or something.

[Cankin]

One of them is in the front. Maybe if someone wants to come over with a laptop or something.

I believe the question was how the hack can it accept 24/768 over USB

Formats

Audio files supported: USB = WAV (LPCM up to 768kHz / 32bit)

Sample Rate

USB 32kHz to 768kHz, 24bit

S/PDIF 32kHz to 192kHz, 24 bit

iPod, iPhone 48kHz max

[cclragnarok]

I don't think it's a regular USB DAC that connects to a computer.

According to the description, you plug USB memory sticks into the USB ports. The DAC then reads and plays the music files stored on the memory stick.

[deepak]

Yes good point I didn't think of that

Maybe it's poorly worded and means it upsamples USB data to that frequency.

I don't think it's a regular USB DAC that connects to a computer.

According to the description, you plug USB memory sticks into the USB ports. The DAC then reads and plays the music files stored on the memory stick.

Then that is a bit strange, since it does have a Blackfin DSP on board and I believe someone here was going to (or thought about) using a Blackfin for regular USB input from a computer.

Edited September 26, 2009 by deepak

[Cankin]

I don't think it's a regular USB DAC that connects to a computer.

According to the description, you plug USB memory sticks into the USB ports. The DAC then reads and plays the music files stored on the memory stick.

You're right, I just looked at the white paper

[Hopstretch]

Is it wrong to be biased against Naim without any personal experience at all, just because so many annoying English wankers are so devoted to it?

[morphsci]

It also has the Apple authentication chip so it can receive the unprocessed digital data from your iphone/ipod.

[tyrion]

It also has the Apple authentication chip so it can receive the unprocessed digital data from your iphone/ipod.

Just noticed that. Interesting. I wonder what the price is.

[Cankin]

[url=http://whathifi.com/News/Naim-launches-1950-zero-jitter-DAC-complete-with-iPod-digital-input/]

[tyrion]

[url=http://whathifi.com/News/Naim-launches-1950-zero-jitter-DAC-complete-with-iPod-digital-input/]

[Hopstretch]

That would be very decent price point if they actually have completely eliminated jitter from the S/PDIF interface. Proof, pudding etc.

[feckn_eejit]

[grawk]

wtf?

[Dusty Chalk]

Is it wrong to be biased against Naim without any personal experience at all, just because so many annoying English wankers are so devoted to it?

Yes.

[Tachikoma]

I believe it does HDCD, looks like it does it through the custom DSP filter?

IIRC the PMD200 is actually a blackfin DSP (like the one the Naim is using) so it looks like they've re-created the PMD200 somehow...

I hope the USB stick/ipod input have been done properly - me likes not having to worry about SPDIF.

[a_technicolor_skye]

it's not that difficult to do if you resample and reclock the signal. say, like what a certain French company does...

Which French company is that?

Thanks

[n_maher]

Which French company is that?

Thanks

[The Monkey]

That would be very decent price point if they actually have completely eliminated jitter from the S/PDIF interface. Proof, pudding, spotted dick, etc.

British.

[feckn_eejit]

wtf?

ah balls, f'd by image embed protection thingie. was meant to be an album cover shot - _Louder than Words_ by The Jitters. Felt the band name was appropriate. Actually not too bad an album either!

[Dreadhead]

Me interested.... Very interested.....

[seroxatmad]

Is it wrong to be biased against Naim without any personal experience at all, just because so many annoying English wankers are so devoted to it?

Thanks....