Amp Camp Pre+Headphone Amp - ACP+

[audio1901]

I have high efficiency speakers (98 dB) and have tried my ACP+ as a power amp. It sounded great, but the bass seemed a bit weak.

Oh sorry, I should clarify, I meant as a power amp for headphones, much less power needed. Thanks for the reply, I didn't know that this little amp could even power speakers. If so, I may just build a set, would be a first for me since I'm only a headphone listener.

 

[6L6]

I have high efficiency speakers (98 dB) and have tried my ACP+ as a power amp. It sounded great, but the bass seemed a bit weak.

Considering that the ACP+ PSU has 250mA for each channel, what exactly were you expecting? 😁😁😁

 

[DJDestiny]

I have high efficiency speakers (98 dB) and have tried my ACP+ as a power amp. It sounded great, but the bass seemed a bit weak.

Given any speaker has higher inductance at the low end than a headphone, that is to be expected with lower damping factor and limited current output

 

[DJDestiny]

Oh sorry, I should clarify, I meant as a power amp for headphones, much less power needed. Thanks for the reply, I didn't know that this little amp could even power speakers. If so, I may just build a set, would be a first for me since I'm only a headphone listener.

It has plenty enough juice for cans 😏

 

[ericrosenfield]

Thanks for the video and the mods, I'll try them out soon when parts arrive.

Also, have you tried digital volume control and running the amp as a power amp? Meaning you open the potentiometer volume all the way and use your dac as volume control, if your dac has volume control. I tend to get better audio that way.

I will try using the DAC as a volume control though, that sounds interesting. I thought I read that using digital volume control limited the dynamic range or something like that which is most of the reason I've never bothered with it even though my DAC has a volume knob and a preamp mode.

 

[CWelsh52]

Considering that the ACP+ PSU has 250mA for each channel, what exactly were you expecting? 😁😁😁

The weak bass was actually what I expected. I just wanted to see what it would do on its own and what kind of changes I could hear when I added the ACAs back into the chain. Another member had suggested I give it a try and I was impressed with the results.

 

[DJDestiny]

I will try using the DAC as a volume control though, that sounds interesting. I thought I read that using digital volume control limited the dynamic range or something like that which is most of the reason I've never bothered with it even though my DAC has a volume knob and a preamp mode.

Yes, it absolutely does. Might affect SNR as well? I'm unsure on that part but digital volume control throws out the bits
Not a particularly big deal if you already are on a 32bit S-D as the real range is more of 24bit but I'm unsure if it cuts off from the real range when using digital volume control

 

[Centurion53]

Will the ACP+ run at lower voltages, say 18 volts?