Hey guys, wondering if I can get a little help with this…
I have a Pioneer deck (DEH-P4600MP) that has 2 Preamp outputs in the rear that I have leading to my 5 channel Alpine amp. Now my roomie just offered me his slightly newer Pioneer DEH-1900mp. It has the AUX in the front which I am looking for but the deck only has 1 RCA Preamp output.
What I’m wondering is, will my sound quality suffer at all from switching to this deck? I use the amp to run both front and rear speakers as well as the sub. Will my amp now be gettign LESS of a signal somehow?
Thanks in advance for taking the time to answer my dumbass question.
the DEH-1900MP is meant to be a budget deck. the front & rear speakers are powered by the head units internal amplifier. rear output would be for something like a subwoofer amp.
if your amplifier has an input select feature such as going from 2ch mode to 4ch mode you could possibly use it but then you would loose your fader (front to rear separation)
your amplifier might also accept speaker level inputs. you could use that if it has it.
Ahhhh I see…Damn that sucks. Now I am going to have to find the pin-outs again and ghetto rig my ipod in from the cd changer again.
Thanks tilegend, oh, and about these speaker level inputs, I do have those on this amp but I really dont know what they are for…Never used them. Care to enlighten? Its too early too search
if your amplifier has speaker level inputs its basically contains a line output converter.
alot of people use LOCs so that they can stick with stock HU with aftermarket amplifiers. especially since stock HUs don’t really have pre-amp outputs, and that is what a LOC does, it converts the speaker level (high) output, to a pre-amp (low/signal) level output that the amplifier uses.
Your still better off, [better SQ] using the single set of preamp outputs of the Pioneer DEH-1900mp, even if you have to install RCA “Y” adapters, then to use the speaker level inputs to the amp.
Once the system is set up there should be no need for front to rear fade, in fact I would wire the rear speaker in series and connect them to the bridged rear channels of the amp for a mono rear fill, it will improve imaging and staging, I would also remove/disable the rear tweeters, it will help imaging, and help eliminate “left/right bias”. :whisper:94
OIC, the Alpine gutless wonder, 4x30W RMS into 4 ohms and 1x100W RMS into 4 ohms.
Alpine Flex series amps were designed to upgrade a stock HU, but if you can live with the low wattage all you need is a set of RCA “Y” adapters , [one male to two females].94
DEH-P4600MP Head Unit (or DEH-1900mp)
Alpine Gutless Wonder Amp
8 Inch Rockford Fosgate Sub
2 well made RCA connectors extra long.
2 extra long speaker wires.
2 short speaker wires
1 sub speaker wire
Heavy Gauge Power wire with stinger fuse.
Good grounds for both car and amp.
If you have a second, how would you suggest I set it up?
Like this still?
using the single set of preamp outputs of the Pioneer DEH-1900mp, even if you have to install RCA “Y” adapters, then to use the speaker level inputs to the amp.
Once the system is set up there should be no need for front to rear fade, in fact I would wire the rear speaker in series and connect them to the bridged rear channels of the amp for a mono rear fill, it will improve imaging and staging, I would also remove/disable the rear tweeters, it will help imaging, and help eliminate “left/right bias”. 94
I’m unclear as well why you suggest I would get better SQ with the lesser HU…Is it that, although the HU is a more discount model the internal wiring is the same…And it is not the HU that makes the SQ better or worse in this case it is the way you are hooking it up? ie “…I would wire the rear speaker in series and connect them to the bridged rear channels of the amp for a mono rear fill, it will improve imaging and staging…” ??
I will admit I don’t understand a lot of what you wrote in the second paragraph there, so I will do some research on some of the key terms and see what i can learn in the meantime.
DEH-P4600MP Head Unit (or DEH-1900mp)
Alpine Gutless Wonder Amp
8 Inch Rockford Fosgate Sub
2 well made RCA connectors extra long.
2 extra long speaker wires.
2 short speaker wires
1 sub speaker wire
Heavy Gauge Power wire with stinger fuse.
Good grounds for both car and amp.
If you have a second, how would you suggest I set it up?
Like this still?
I’m unclear as well why you suggest I would get better SQ with the lesser HU…Is it that, although the HU is a more discount model the internal wiring is the same…And it is not the HU that makes the SQ better or worse in this case it is the way you are hooking it up? ie “…I would wire the rear speaker in series and connect them to the bridged rear channels of the amp for a mono rear fill, it will improve imaging and staging…” ??
I will admit I don’t understand a lot of what you wrote in the second paragraph there, so I will do some research on some of the key terms and see what i can learn in the meantime.
Thank you very much for taking the time…[/QUOTE]
fcm is stating that sound quality wise RCA>speaker level inputs even if you have to use a Y cable to split the signal.
Yes, you are only bridging the rear channels for the rear speakers, the front channels stay in 2ch mode, [stereo].
If I just run all 4 speakers off the HU, bridge the amp for my sub will it benefit my bass output in any way?
No, the amp has 1 sub channel, you could bridge the other 4 channels into 2 channels but you could still not connect them to the sub, the amp is a 5ch amp and can be run as a 5ch, [L/R front, L/R Rear and sub] or as a 3ch, [L/R and sub] or as I suggest a 4ch, [L/R front, L/R mixed mono rear and sub]… http://vault.alpine-usa.com/products/documents/OM_MRP-F356.PDF
sorry if those questions are
Questions would only be “way off the mark” if asked and answered more then twice.
this stuff in no way comes naturally to me
Keep in mind, we are all n0obs at something, I for example, am a computer illiterate, what I do here and on H/T is the extent of my computer knowledge. :stare:94
well? its all installed and done.
I bridged the rears for a mono split signal and ran the fronts as is. Mounted the amp to the back of the seat and tucked all the wires.
I learned a whole lot out of this install thanks to you guys pointing me in the right directions. (And a great link Tilegend!)
I have Clarion Pro Audio front speakers with crossovers installed leading to seperate tweeters. I guess the only question I have left is would you recommend using the HP fiilter on the amp for the front channels in addition to that crossover or is that just unneccesary?
Thanks for all the help. This install was seamless once I did all the reading and took my time, testing each step as I went along.
Its too early too search 
94
