Cheap multichannel DACs: Sound Blaster X3 vs Xonar U7

Hello,
I own a Xonar U7 usb soundcard that I plan to use in a budget multichannel system, but I have two concerns:
  • only 1 volt line output
  • two different dac chips: CS4398 for the main 2 channels, and the lesser CS4362 for the rest

The low output voltage bothers me....

I am thinking on getting a Sound Blaster X3, that has a 8 channel AKM AK4458vn (don't know if it is an upgrade relative to the CS4398), but more relevant for me, does anybody know what is the output voltage of th Sound Blaster X3? Cannot find it anywhere

Thanks!
 
I've been using an Asus U7, which has been slowly dying
Took a chance and replaced the U7 with Soundblaster X3 and it works on Linux - Out Of The Box ... at least on kernel 5:15 (ubuntu 22.04 & moodeaudio 8.02 tested so far)

Using the U7 ... and now the X3 for 3-way active speakers ie. 6 channels via Moodeaudio & CamillaDSP.

My subjective opnion after ~2 hours is that the X3 sounds better, probably because I was using one of the "worse" U7 channels for treble whereas the X3 channels are likely to be "all the same" given the DAC chips involved

Confirm Soundblaster X3 works out of the box and produces a good result !

Alsa info for X3 (from Moodeaudio 8.02 / kernel 5:15.28)
aplay -D hw:2,0 --dump-hw-params /dev/zero
Playing raw data '/dev/zero' : Unsigned 8 bit, Rate 8000 Hz, Mono
HW Params of device "hw:2,0":
--------------------
ACCESS: MMAP_INTERLEAVED RW_INTERLEAVED
FORMAT: S16_LE S32_LE S24_3LE
SUBFORMAT: STD
SAMPLE_BITS: [16 32]
FRAME_BITS: [32 256]
CHANNELS: [2 8]
RATE: [48000 192000]
PERIOD_TIME: [125 2730667)
PERIOD_SIZE: [6 131072]
PERIOD_BYTES: [64 524288]
PERIODS: [2 1024]
BUFFER_TIME: (62 5461334)
BUFFER_SIZE: [12 262144]
BUFFER_BYTES: [64 1048576]
TICK_TIME: ALL
--------------------
aplay: set_params:1343: Sample format non available
Available formats:
  • S16_LE
  • S32_LE
  • S24_3LE

The only Max V info I have suggests ~ 2V from here ASR Forum - X3 Output Voltage

Even more Alsa info for the X3
cat /proc/asound/X3/stream0
Creative Technology Ltd Sound Blaster X3 at usb-0000:01:00.0-1.2, high speed : USB Audio

Playback:
Status: Stop
Interface 4
Altset 1
Format: S16_LE
Channels: 2
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 125 us
Bits: 16
Channel map: FL FR
Sync Endpoint: 0x83 (3 IN)
Sync EP Interface: 4
Sync EP Altset: 1
Implicit Feedback Mode: No
Interface 4
Altset 2
Format: S16_LE
Channels: 6
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 125 us
Bits: 16
Channel map: FL FR FC LFE RL RR
Sync Endpoint: 0x83 (3 IN)
Sync EP Interface: 4
Sync EP Altset: 2
Implicit Feedback Mode: No
Interface 4
Altset 3
Format: S16_LE
Channels: 8
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 125 us
Bits: 16
Channel map: FL FR FC LFE RL RR SL SR
Sync Endpoint: 0x83 (3 IN)
Sync EP Interface: 4
Sync EP Altset: 3
Implicit Feedback Mode: No
Interface 4
Altset 4
Format: S24_3LE
Channels: 2
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 125 us
Bits: 24
Channel map: FL FR
Sync Endpoint: 0x83 (3 IN)
Sync EP Interface: 4
Sync EP Altset: 4
Implicit Feedback Mode: No
Interface 4
Altset 5
Format: S24_3LE
Channels: 6
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 125 us
Bits: 24
Channel map: FL FR FC LFE RL RR
Sync Endpoint: 0x83 (3 IN)
Sync EP Interface: 4
Sync EP Altset: 5
Implicit Feedback Mode: No
Interface 4
Altset 6
Format: S24_3LE
Channels: 8
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 125 us
Bits: 24
Channel map: FL FR FC LFE RL RR SL SR
Sync Endpoint: 0x83 (3 IN)
Sync EP Interface: 4
Sync EP Altset: 6
Implicit Feedback Mode: No
Interface 4
Altset 7
Format: S32_LE
Channels: 2
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 125 us
Bits: 32
Channel map: FL FR
Sync Endpoint: 0x83 (3 IN)
Sync EP Interface: 4
Sync EP Altset: 7
Implicit Feedback Mode: No
Interface 4
Altset 8
Format: S32_LE
Channels: 6
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 125 us
Bits: 32
Channel map: FL FR FC LFE RL RR
Sync Endpoint: 0x83 (3 IN)
Sync EP Interface: 4
Sync EP Altset: 8
Implicit Feedback Mode: No
Interface 4
Altset 9
Format: S32_LE
Channels: 8
Endpoint: 0x01 (1 OUT) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 125 us
Bits: 32
Channel map: FL FR FC LFE RL RR SL SR
Sync Endpoint: 0x83 (3 IN)
Sync EP Interface: 4
Sync EP Altset: 9
Implicit Feedback Mode: No

Capture:
Status: Stop
Interface 5
Altset 1
Format: S16_LE
Channels: 2
Endpoint: 0x81 (1 IN) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 500 us
Bits: 16
Channel map: FL FR
Interface 5
Altset 2
Format: S24_3LE
Channels: 2
Endpoint: 0x81 (1 IN) (ASYNC)
Rates: 48000, 96000, 192000
Data packet interval: 500 us
Bits: 24
Channel map: FL FR

I'm posting this to help anyone else wondering about a "cheap" usb soundcard for active speakers. My main alternative was going to cost 6 times as much where I am for "some" benefit but not 6x

I've also sworn off the U7 even though they're still available used, from AliExpress. Just not reliable and quite old now.