QuestionI have recently installed a new PIONEER DEH-P7700MP head unit
(http://www.amazon.com/exec/obidos/tg/detail/-/B0007PZ8SW/104-5997674-7123963?v=g...)
into my '91 Pontiac Sunbird. I also have two '05 Pioneer TS-A6991R 6X9
5-way speakers in the back. My question is, since the RMS of the 6x9's
are 80w and they are 4 ohm resistance, could I use a 4 channel amp
that outputs 80W at 4 ohms and bridge two channels to 225W, to run the
first two channels to my 6x9's and the bridged channel to a sub? For
example, could I do this with the PROFILE HA1040 amp? Also, what would
I need to do about a crossover? I'm still a little sketchy on what a
"crossover" is and how it works.
Also, would you have any suggestions as to a good amp and sub (just have room for one sub) to go with the head unit and speakers i already have?
Thanks
Answer
Hi John,
In a word... yes.
Just run two channels in stereo (80 watts to each 6x9) and then bridge the remaining two 80 watt channels (to about 180 watts) for the sub (all RMS ratings).
Get a 4 channel amp with a 'built-in' crossover and your troubles will be few. They are very easy to use as they only direct 'ranges of frequencies' to the speakers best suited to reproduce those frequencies. Offhand, I do not know if that Profile amp will do.. but I would not recommend a Profile for anything you plan to use for over a few years.
I might add that setting a crossover up optimally for your system is a little more refined and is one of the most important parts of 'dialing in' a system once its installed.
Get one and you can learn fast. Always tune the system to its weakest link (whether it is subs or mids...ect) and you cannot go wrong. :)
MANY amps and sub combos can work great. I prefer Hifonics Amps and McCaulley Subs/midbasses/mids and Polk highs.
Sincerely,
Jerry Mael
