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Best way to go from S/PDIF input to RCA analog output with volume control?
Best way to go from S/PDIF input to RCA analog output with volume control?
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Old 11th October 2019, 02:16 PM   #1
Jimmy154 is offline Jimmy154  United States
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Default Best way to go from S/PDIF input to RCA analog output with volume control?

Trying to go from TV optical cable to amp with RCA inputs.
I have a giant receiver now and I'm sick of looking it and listening to it.

Is there a good amp with digital/optical input?
I find tons of cheap amps with RCA input but not digital input.
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Last edited by Jimmy154; 11th October 2019 at 02:26 PM.
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Old 11th October 2019, 02:58 PM   #2
JensenHealey is offline JensenHealey  United Kingdom
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Just find a freestanding DAC with volume control. Something like this

Pro-Ject Pre Box S2 Digital review | What Hi-Fi?

I have one - brilliant device.
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Old 12th October 2019, 04:18 AM   #3
DRONE7 is offline DRONE7  New Zealand
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Perreaux.... check out the 80i
Integrated Amplifiers : Perreaux Audio

They have spdif optical and coax plus usb async dac

Last edited by DRONE7; 12th October 2019 at 04:24 AM.
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Old 12th October 2019, 09:59 AM   #4
forestsgump is offline forestsgump
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Checkout Alientek D8 -- FDA simplicity with Digital, USB, Analog inputs. Supports DSD/PCM as well.

Alientek D8 headphone amplifier and DAC | Headphone Reviews and Discussion - Head-Fi.org

ALIENTEK D8 Full Digital Amplifier FDA STA326 USB XMOS Class D 2x 50W / 8 Ohm Black - Audiophonics
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Old 12th October 2019, 01:36 PM   #5
linuxfan is offline linuxfan  Australia
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Quote:
Originally Posted by forestsgump View Post
Checkout Alientek D8
+1. Cheap but crazy good.
I don't like to use my main hifi system for TV/video listening, so I have a second audio system based around the Alientek D8 dedicated to this purpose. I feed this amp from the optical s/pdif output of my television, and for speakers I currently have the budget-friendly Micca MB42x. Listening to television, whenever a musical introduction or musical backing is playing, I continue to be surprised how good it sounds! And the D8 amp is good enough to feed into higher-model speakers, too.
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Old 19th October 2019, 01:50 PM   #6
linuxfan is offline linuxfan  Australia
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Decision? Outcome?
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Old 19th October 2019, 04:53 PM   #7
Jimmy154 is offline Jimmy154  United States
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Quote:
Originally Posted by linuxfan View Post
Decision? Outcome?
Who me?

A lot of cheap DAC out there.
I guess DAC stands for digital to analog converter, who knew?
I don't know which DAC sounds better than any other one, but my TV is cheap, so I guess might as well get any cheap DAC, like this one:

DAC Digital Optical Toslink Coaxial to Analog Audio Converter Adapter L/R RCA W9 | eBay

I can and do ask "audiophiles", but they have all kinds of weird opinions, of what sounds best

Some headphones amps, seem to look like they are made better.
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Old 20th October 2019, 05:49 AM   #8
linuxfan is offline linuxfan  Australia
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Quote:
Originally Posted by Jimmy154 View Post
Who me?
Yes, of course. You're the original poster.

Quote:
Originally Posted by Jimmy154 View Post
I guess DAC stands for digital to analog converter, who knew?
There's an entire sub-forum here dedicated to the subject -
https://www.diyaudio.com/forums/digital-line-level/

Quote:
Originally Posted by Jimmy154 View Post
but my TV is cheap, so I guess might as well get any cheap DAC, like this one:
DAC Digital Optical Toslink Coaxial to Analog Audio Converter Adapter L/R RCA W9 | eBay
Fair enough. It's just difficult for us to offer advice when we don't know the true aim and agenda of the person who is asking for advice.
This is a hi-fi forum, and the original post did specify "good amp with digital/optical input".
Now I know your standpoint, I just offer a few more points to consider: now that you have decided to buy a cheap DAC, you still need an amplifier - so will you continue to use that "giant receiver" that you "are sick of looking at"? Or will you buy a new amplifier? Will the new amplifier be cheap, to match the cheap DAC (and cheap TV)?
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Old 20th October 2019, 07:43 AM   #9
jean-paul is offline jean-paul  Netherlands
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So it should be small and it should have optical inputs. Try an FDA (Full Digital Amplifier), you will like the principle. Alientek D8 is OK and I just read about the Sabaj A4 in another thread.

I have good experiences with Denon PMA50 and PMA60. They latter meanwhile serves as main amplifier (it plays high res and even DSD). You can connect the TV but you can also listen your music at excellent SQ and it has the plus that it is only one system. A somewhat longer Toslink cable from the TV to it and you are done.

If you are rich and have a lot of time you can bother to try various cheap solutions (that end up in landfill). If you have a budget better buy a good FDA. You will have to get used to it. Most still bother with converting digital to analog and amplify the analog signal and fill their homes with various boxes for each function. It can be done quite well in the digital domain in just one box. It saves the usual hassle with noisy switches and volume controls too.

There is a risk though: you might like the solution so much that the FDA becomes your main system. No more DIY fiddling with tubes, LM317's and such. Just one good looking, well functioning and excellent sounding device. Horror
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Last edited by jean-paul; 20th October 2019 at 07:57 AM.
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Old 20th October 2019, 02:39 PM   #10
Jimmy154 is offline Jimmy154  United States
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Quote:
Originally Posted by linuxfan View Post
Yes, of course. You're the original poster.
Who me?

A lot of options.
I spent hours looking for products (boards/chips, etc); but I can't really build something right now, I think.

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This chip seems okay:
AD1955 Datasheet and Product Info | Analog Devices

Of course I don't know most of the specs
All this seems great:
120 dB SNR/DNR (not muted) at 48KHz Sample Rate (A-Weighted Stereo)
123 dB SNR/DNR (Mono)
-110 dB THD+N
110 dB Stopband Attenuation with 0.0002dB Passband Ripple

Found a DAC using this chip in Dual mono setup, I believe, already built. I don't have time to build

__________________________________________

Favoring the AK4490-AK4499, seems like a lot of people on here are using the AK449x chips.

These chips have -112 dB THD+N or lower, but it's so low already, I would think it doesn't matter anymore. But I don't know if any of this is audible of course.

Maybe I'll find a DAC kit (or complete DIY DAC) some one wants to sell or buy a AK4490 kit online.
I usually just buy whatever some one wants to get rid of.

I was eating my kids leftovers last night and was thinking: I don't even remember what I like to eat anymore

DAC stays on the table, amp goes out of sight
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Last edited by Jimmy154; 20th October 2019 at 02:46 PM.
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