kylej
10+ year member
Junior Member
My head unit (Alpine CDA-105) only has a 2v preamp output for some reason. Alpine cheaped out there I suppose. Does the 4v really make that much difference in quality?
eclipse ftw brotha.its definately a difference, i like running at least 5v preouts personally.
Your CDA-105 is entry level from Alpine. That's what you get from any Tier 1 manufacturer's low end models. 2V outputs are not as important as having enough pre-outs for your system. If the 105 does what you need then you're fine.My head unit (Alpine CDA-105) only has a 2v preamp output for some reason. Alpine cheaped out there I suppose.
I was wondering about that. I have an older amp that I want to hook up for mids and highs. The manual says the inputs are 200 mv - 2 volt. As you know most head units are now manufactured with 4 volt. They still make some 2 volt head units, but they seem be limited on features compared to the 4 volt and higher. I have not purchased a head unit yet. Can I use a head unit with 4 volt outputs on this amp and just turn the gains down? https://download.phoenixphorum.com/Manuals/Amplifiers/MQ_Amps/MQ430_manual.PDFhigher voltage is usually better but just make sure whatever voltage you go with, your amp has at least a minimum of that
You can use one of these-Can I use a head unit with 4 volt outputs on this amp and just turn the gains down?
For some reason you can't link to DIYMA from here. 2v is just fine. If you have a 4v HU, just use a lower volume setting (down 3db) to set your gains.Thank you Sir. I just came across this post a few moments ago. https://www.diymobileaudio.com/threads/preamp-outs-2v-vs-4v.90463/post-1143599
Thanks. This is one of the head units I have been considering. I like the built in crossover feature. https://www.crutchfield.com/p_130DM2660/Pioneer-DMH-2660NEX.html My wife has a AVH2400 that has been installed for over a decade and it still works great. I have never had any problems out of a Pioneer HU.For some reason you can't link to DIYMA from here. 2v is just fine. If you have a 4v HU, just use a lower volume setting (down 3db) to set your gains.