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resistor relay volume control preamp
- Thread starter Brab
- Start date
Nordling
Member
Gustard H16 is a bit cheaper but I would choose Topping L70 because it has better SINAD and better functionality.
- Thread Starter
- #5
Looks perfect, but can't find any availability.
staticV3
Grand Contributor
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Available on Audiophonics:
SABAJ A10H Amplificateur Casque Class AB 1W 32 Ohm - Audiophonics
Sabaj vient compléter sa gamme A10 avec cet amplificateur casque A10h, un modèle de grande qualité basé sur une architecture optimisée utilisant des composants audio soigneusement sélectionnés.
www.audiophonics.fr
audio_tony
Addicted to Fun and Learning
I have an A10H which I use as a preamp and it works well.
solderdude
Grand Contributor
precision and channel balance and easy remote control yes.
Distortion is not really determined by this.
restorer-john
Grand Contributor
At the end of the day, an ALPs motorized blue velvet (conductive plastics RK-27) is arguably a better choice.
I don't think I've ever had a failed one on my bench.
solderdude
Grand Contributor
me neither. have seen relays and relay drivers fail ...
arguably, calibrated attenuation, channel balance, accuracy goes to the relay thingies at the cost of PCB space and power consumptions as well as mechanical noises.
arguably, calibrated attenuation, channel balance, accuracy goes to the relay thingies at the cost of PCB space and power consumptions as well as mechanical noises.
I totally agree. Just don't ever use switch cleaner on one. Ask me how I know...
You have to use the right kind that does not affect the plastic film.
Lindirizzo
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A few years ago I've build this with great satisfaction:
welwynnick
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I was trying to work out if the JDS Labs Element IV DAC & HP Amp in the latest ASR review had a relay switched resistors volume control (R2R) and I stumbled across this thread.
I've been trying to answer similar questions myself. R2R volume controls are the preserve of cost-no-object preamps costing tens of thousands of dollars.
They're expensive to make, and I think we should be grateful that Topping makes the L70 with R2R and performance that rivals the best preamps, too. We live in fine times.
The alternative Sabaj A10h has already been mentioned, but the Sabaj A20h is available. It doesn't have a preamp output, but you can use a TRRRS to XLR adapter.
unpluggged
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There are pictures of its PCB, it's obvious that it does not.
No such thing. R-2R is an ancient AD/DA converter topology. Relay-controlled volume controls do not use R-2R ladders.
welwynnick
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Yes, I saw those, too. I was just saying how I came across this old thread.
Yes, I know that, but it is a widely used expression. I'm not aware of a concise and accurate abbreviation to save tiresome seconds typing.
Last edited:
Try "stepped analog". Includes both relay and rotary switch types, but excludes digital.
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