Hello,
I just would like the confirmation that Amp+ can work with 6 ohms speakers.
If I understand well, it is compatible with speakers which impedance is between 4 and 8 ohms.
Thank you.
Best regards,
Date
Votes
10 comments
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HiFiBerry team Yes, 6 Ohm speakers will work fine
Bst regards
Daniel -
erwanj Hello,
I have just received my amp+ and I am trying to make it work.
I have just figured out in the comparaison matrix that the analout output is "up to 2x25W".
I have 2 old speakers "sony SS RXD3E" that are 6 ohms and 60 watts.
I have tried your package image and volumio and never get sound. I guess that it is related if the speeakers that can't work with amp+.
Is it correct?
Thank you for your help.
Erwan
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HiFiBerry team Hi Erwan,
your assumption is not correct. The wattage of speaker is irrelevant. It only tell you what maximum input power is accepted by the speaker until it gets damaged.
Did you use the HiFiBerry installer to install Volumio? If not, how did you configure Volumio?Best regards
Daniel
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erwanj Hi,
I am running ubuntu so I can't use your installer. I have installed your preconfigured distribution : Raspbian with automatic detection of Digi/Digi+/DAC+/Amp/Amp+
I have a raspberry pi 2 and I am using your "Meanwell GS60A18-P1J" power supply. I don't use the miniusb power on the raspberry pi 2.
The speakers do work on the old hifi system.
Some elements that may help:
pi@raspberrypi ~ $ uname -a
Linux raspberrypi 3.18.7-v7+ #755 SMP PREEMPT Thu Feb 12 17:20:48 GMT 2015 armv7l GNU/Linuxpi@raspberrypi ~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_amp], device 0: HifiBerry AMP HiFi tas5713-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0pi@raspberrypi ~ $ aplay -L
null
Discard all samples (playback) or generate zero samples (capture)
sysdefault:CARD=sndrpihifiberry
snd_rpi_hifiberry_amp,
Default Audio Devicepi@raspberrypi ~ $ amixer
Simple mixer control 'Master',0
Capabilities: volume volume-joined penum
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 248
Mono: 199 [80%]
Simple mixer control 'Channels',0
Capabilities: volume penum
Playback channels: Front Left - Front Right
Capture channels: Front Left - Front Right
Limits: 0 - 248
Front Left: 200 [81%]
Front Right: 200 [81%]pi@raspberrypi ~ $ cat /boot/config.txt
dtparam=i2c1=on
dtoverlay=hifiberry-amppi@raspberrypi ~ $ lsmod
Module Size Used by
sg 18207 0
uas 13203 0
8192cu 528429 0
snd_soc_bcm2708_i2s 6637 2
snd_soc_hifiberry_amp 2392 0
snd_soc_tas5713 5006 1
regmap_mmio 2961 1 snd_soc_bcm2708_i2s
snd_soc_core 140285 3 snd_soc_hifiberry_amp,snd_soc_tas5713,snd_soc_bcm2708_i2s
snd_seq 53078 0
snd_compress 7610 1 snd_soc_core
snd_seq_device 5628 1 snd_seq
snd_pcm_dmaengine 3359 1 snd_soc_core
snd_pcm 75388 2 snd_soc_core,snd_pcm_dmaengine
snd_timer 17784 2 snd_pcm,snd_seq
regmap_i2c 2354 1 snd_soc_tas5713
snd 51667 6 snd_soc_core,snd_timer,snd_pcm,snd_seq,snd_seq_device,snd_compress
i2c_bcm2708 4990 0
evdev 9950 2
uio_pdrv_genirq 2958 0
uio 8119 1 uio_pdrv_genirqpi@raspberrypi ~ $ cat /etc/modules
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
# Parameters can be specified after the module name.
#snd-bcm2835# output of mplayer: I get no sound
pi@raspberrypi ~ $ mplayer /mnt/aa.flac
MPlayer svn r34540 (Raspbian), built with gcc-4.6 (C) 2000-2012 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.Playing /mnt/aa.flac.
libavformat version 53.21.1 (external)
Mismatching header version 53.19.0
Audio only file format detected.
Load subtitles in /mnt/
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
libavcodec version 53.35.0 (external)
Mismatching header version 53.32.2
AUDIO: 44100 Hz, 2 ch, s16le, 831.1 kbit/58.89% (ratio: 103889->176400)
Selected audio codec: [ffflac] afm: ffmpeg (FFmpeg FLAC audio)
==========================================================================
AO: [pulse] Init failed: Connection refused
Failed to initialize audio driver 'pulse'
AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)
Video: no video
Starting playback...
A: 6.2 (06.2) of 280.0 (04:40.0) 1.4%Exiting... (Quit)
pi@raspberrypi ~ $# I get no sound
pi@raspberrypi ~ $ play -n synth sine 1000
play WARN alsa: can't encode 0-bit Unknown or not applicableEncoding: n/a
Channels: 1 @ 32-bit
Samplerate: 48000Hz
Replaygain: off
Duration: unknownIn:0.00% 00:00:03.58 [00:00:00.00] Out:172k [!=====|=====!] Hd:0.0 Clip:0
Aborted.Thank you for your help.
Best regards,
Erwan
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HiFiBerry team Ok, this looks good so far. The "play -n synth sine 1000" command, does it hang at some point or is it continously playing (according to the output on the screen)?
Can you send a picture of your cabling?
Best regards
Daniel -
erwanj Here are some pictures : https://goo.gl/photos/hAZYKM3wJHBmDVHh6
The command "play -n synth sine 1000" doesn't hang.
I have been playing it for 3 min without problem :
pi@raspberrypi ~ $ play -n synth sine 1000
play WARN alsa: can't encode 0-bit Unknown or not applicableEncoding: n/a
Channels: 1 @ 32-bit
Samplerate: 48000Hz
Replaygain: off
Duration: unknownIn:0.00% 00:03:52.62 [00:00:00.00] Out:11.2M [!=====|=====!] Hd:0.0 Clip:0
Aborted.Thank you for your support.
Best regards,
Erwan
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HiFiBerry team Hi Erwan,
this is very strange. You can try upgrading to Linux 4.x (using rpi-update), but I don't expect that this will change something.
We haven't seen a problem like this before. The only option that I can offer is sending us the Amp+ board and we test it here.
Best regards
Daniel
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HiFiBerry team Hi Erwan,
another idea: Do you have another Raspberry Pi to test? We have seen rare cases of Raspberry Pi's with defective GPIO pins.
Best regards
Daniel -
erwanj Hi,
I have 2 rapsberry pi 2 and I have also bought a hifiberry DAC+.
I will do additionnal test switching to the other rapsberry and keep you updated.
Did the cabling seem right?
I will keep you updated.
Best regards,
Erwan
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HiFiBerry team Yes, the cabling looks good.
Best regards
Daniel
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