Posted 21 February 2012 - 11:13 PM
exau2i multi-channel asynchronous usb i2s interface fft plot
using 1khz -80db @ 32bit float/192k
Does this plot indicate that with gear currently available, jitter can effectively be elimiated?
Whether its the jitter, or whatever, these sure are special devices. The EXA U2I with Buffalo dac and the EXA E18 dac I'm using are giving me so much enjoyment I'm amazed they havent received a lot more recognition . The spatial presentation of these things is amazing , soundstaging is stunningly 3D , with placement of instruments so precisely positioned. Sometimes with a good recording you can sense such precise imaging in both depth and width that its like listening to a recording in a completely different way , hard to explain but no way i'm giving these devices up.
I'm using the E18 dac straight off the dac ouputs with the opamps and filters disconnected, tube output, and trying different combinations of the dac outputs ( the dac chip has 8 outputs, 4 per channel ) and the difference between using just one output and 4 in parallel is quite significant, output impedance is obviously the main factor, but I suspect something else is happening here. Its interesting that people comment on the Sabre "sound'- i can tell you there are a number of Sabre "sounds" , but I doubt the differences wouldn't be so audible without the incredible transperancy of the exa I2S devices.
End of transmission, over and out.
Listening room: (1) Dual PC running Windows Server2012/JRiver/JPlay/AudiophileOptimiser. Sabre 9018 dac with Amanero/FIFO/isolater/Si570 clock. OPA861 Transconductance outputs. 71A , 4P1L or 801A/10Y DHT preamp. DEQX digital active crossover with speaker/room correction.
Red Spade Audio PSE-144 2 way point source horns , with AE 18" bass drivers in sealed boxes. Horns driven by 4 monobloc low gain , zero feedback push pull triode amps. Bass driven by high power SS amps.
Luxman PD444 turntable with Dynavector 505 arm, Ortofon SPU cartridge, tube moving coil phono stage.
(2) Laptop running Windows Server 2012/JRiver/AO. TDA1541 dac with Amanero/FIFO/isolater/clock/I2S-PCM boards. Stacked AD844 Transconductance outputs. 71A DHT/6H30 preamp with inbuilt tube crossover 71A >220Hz, 6H30<220Hz
Hybrid Active MartinLogan stats with12" bass drivers, passive crossovers removed, direct connection to step up transformers. High power SS amps(1000 watts into 1 ohm), active subs for bass room mode correction with DSPeaker bass equaliser.
MIcro-Seiki RX-5000 turntable. LCR tube phono MC capable built into preamp/crossover.
Workshop: Windows7/JRiver, various dacs and tube preamps, Acoustat 2+2 electrostatics bi-amped with high power 1000 watt SS amplifiers.
Manufacturer of Supratek preamplifiers.