Hi Tehas,
This is chinese clone of amanero:
https://www.aliexpress.com/item/400....order_list.order_list_main.11.21ef1802XrQMJh
This is chinese clone of amanero:
https://www.aliexpress.com/item/400....order_list.order_list_main.11.21ef1802XrQMJh
This is my diy direct battery supplied rechargeable i2s dac and 4P1L set amp sound test.
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My first raspberry audio player that runs on SW Volumio and most of the components IAN Canada.
My big love!
My big love!
@altor
Hi, I used:
Hi, I used:
Waveshare 7.9inch Capacitive Touch Screen LCD, 400×1280, HDMI
https://www.waveshare.com/7.9inch-hdmi-lcd.htm
My DAC. Basically a #26 or #01A tube output preamp (I built it for the 26 but now prefer the 01A) wrapped around a Buffalo III SE Pro 9028 DAC, with JL Sounds fully isolated USB to I2S input board.
A switch on the back toggles between use as a preamp with 6 line inputs and use as a USB or SPDIF input DAC (another switch selects USB vs SPDIF). The DAC is interfaced to the 01A via Lundahl amorphous cobalt core LL1676 transformers wired 1:1 (2||2:1+1) with a 1k+3nF snubber on the secondary.
The output of the 01A is in parafeed to Bent Audio nickle core silver wired autoformers as OPTs and volume controls.
Power supplies (choke input) are in a separate box connected via umbilical.
The three unconnected wires in the back right are now connected from a 4-position rotary switch to the DAC to select the IIR filter. 70K sounds best to me; I convert everything to DSD512 using HQPlayer.
A switch on the back toggles between use as a preamp with 6 line inputs and use as a USB or SPDIF input DAC (another switch selects USB vs SPDIF). The DAC is interfaced to the 01A via Lundahl amorphous cobalt core LL1676 transformers wired 1:1 (2||2:1+1) with a 1k+3nF snubber on the secondary.
The output of the 01A is in parafeed to Bent Audio nickle core silver wired autoformers as OPTs and volume controls.
Power supplies (choke input) are in a separate box connected via umbilical.
The three unconnected wires in the back right are now connected from a 4-position rotary switch to the DAC to select the IIR filter. 70K sounds best to me; I convert everything to DSD512 using HQPlayer.
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It sounds very, very good feeding my 833C DHT SET amps (200wpc SETs!) and Infinity RSIIb speakers. Tons of detail, believeable soundstage, deep bass.
Complete system:
Complete system:
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The DC balance of the Buffalo DAC differential outputs must be very good, because the primaries of the LL1676s are directly connected to the DAC and with an amorphous cobalt core they would saturate/become magnetized with any significant DC offset. That has not happened in this unit nor did it happen over several years in my previous ES9018 Buffalo DAC.
Always good when you can avoid another cap!
Always good when you can avoid another cap!
Beautiful Infinity!
Thanks for sharing
Claude (Infinity Renaissance 90, bought new and never looked back in over 3 decades)
Thanks for sharing
Claude (Infinity Renaissance 90, bought new and never looked back in over 3 decades)
Hello Claude. I've done quite a few upgrades to my circa 1985 RSIIb's with external passive crossovers, internal bracing, new EMIM ribbon diaphragms from Apogee, new EMIT planar tweeter diaphragms, Cardas Copper Litz wiring, and a completely redesigned LF EQ unit. I haven't yet heard a "modern" speaker that beats them, but I'm not really looking, either...
I see that you did well with the nice must do upgrades!
Well done again
Enjoy these very much
Claude
Well done again
Enjoy these very much
Claude
Here is my new SilverLine DAC. As can be seen it is very similar to my Black Edition DAC that I presented here.
SilverLine on the left and Black Edition on the right.
The new DAC is based on AK4191+AK4499EX. New DAC board has same format as my ES9039Q2M so it fits in same chassis.
Internally both DACs are very similar.
Both use my STM32H7 USB-I2S board (presented here). Power supply is SilentSwitcher XL (see here). Headphone amplifier is an Omicron clone. Display is IPS 160x128. Remote control is SMSL RC-8C. Chassis is Hammond 1455N1601.
My ES9039Q2M and AK4191+AK4499EX DACs have similar circuitry. Both have a composite op amp as I/V stage. But other than that AK4191+AK4499EX is much more complicated to implement especially on such a small format. My version has 8 TPS7A20 LDOs and 2 Jung-Didden regulators for Vref. It has 4 dual and 6 single op amps.
AK4191+AK4499EX has loads of configuration options but most of them are fixed at implementation stage. For runtime I decided to add only 3 new options: gain control, Delta Sigma modulator and DSD volume bypass.
Performance of AK4191+AK4499EX is very dependent on the implementation and layout. Vref and I/V are especially critical.
Here are couple of measurements with Cosmos APU and my ES9822PRO ADC:
-5.5 dBFS at 96kHz
-40dBFS at 96kHz
At higher input levels AK4191+AK4499EX tends to have quite a bit of high order distortion. But at lower levels distortions are very low.
BTW I chose the name SilverLine simply because the local shop was out of black Hammond boxes. Hammond boxes are also available in blue and red. Those will be perfect for my upcoming Bluesound and Red Hot dacs.
SilverLine on the left and Black Edition on the right.
The new DAC is based on AK4191+AK4499EX. New DAC board has same format as my ES9039Q2M so it fits in same chassis.
Internally both DACs are very similar.
Both use my STM32H7 USB-I2S board (presented here). Power supply is SilentSwitcher XL (see here). Headphone amplifier is an Omicron clone. Display is IPS 160x128. Remote control is SMSL RC-8C. Chassis is Hammond 1455N1601.
My ES9039Q2M and AK4191+AK4499EX DACs have similar circuitry. Both have a composite op amp as I/V stage. But other than that AK4191+AK4499EX is much more complicated to implement especially on such a small format. My version has 8 TPS7A20 LDOs and 2 Jung-Didden regulators for Vref. It has 4 dual and 6 single op amps.
AK4191+AK4499EX has loads of configuration options but most of them are fixed at implementation stage. For runtime I decided to add only 3 new options: gain control, Delta Sigma modulator and DSD volume bypass.
Performance of AK4191+AK4499EX is very dependent on the implementation and layout. Vref and I/V are especially critical.
Here are couple of measurements with Cosmos APU and my ES9822PRO ADC:
-5.5 dBFS at 96kHz
-40dBFS at 96kHz
At higher input levels AK4191+AK4499EX tends to have quite a bit of high order distortion. But at lower levels distortions are very low.
BTW I chose the name SilverLine simply because the local shop was out of black Hammond boxes. Hammond boxes are also available in blue and red. Those will be perfect for my upcoming Bluesound and Red Hot dacs.
