When dinosaurs roamed the planet lolI remember when HU's had 200mv output on the RCA's.
When dinosaurs roamed the planet lolI remember when HU's had 200mv output on the RCA's.
Thanks, you hit the nail on the head. This was the kind of advice I was looking for. I agree 100% about the bells and whistles, but I just cant spend any coin on a new HU right now. The audio control EQ's seems to be a better alternative but I would have to come across a good used one at a good price.I think there is notable quality difference. A decent deck with a good dc/dc converter and 24bit dac will outperform 99% of the ones with crappier dacs and lower preouts. they usually go hand in hand. amping a smaller signal results in more distortion. a line driver will help but i would just suggest a better deck or an audio control eq. dont compromise sq for bells and whistles
Also bryan can attest that having the higher volts does help just in going from 4 to 6.5
Sounds more like you wanted someone to agree with you, as oppose to inform you.Thanks, you hit the nail on the head. This was the kind of advice I was looking for. I agree 100% about the bells and whistles, but I just cant spend any coin on a new HU right now. The audio control EQ's seems to be a better alternative but I would have to come across a good used one at a good price.
BTW, you right the dc/dc converter in this unit s**ks. //content.invisioncic.com/y282845/emoticons/wave.gif.002382ce7d7c19757ab945cc69819de1.gif
True, however, none of that really matters if you have a nice amp.My .02 is that the only pro's for higher preouts is that you can set the gain lower. The pros of that are of course that the amp will run cooler and less distortion. Moreso the amp will run cooler.
My bad, make that 500mV in the case of the Alpine 7909...Examples? All the ones Ive ever seen have 4v+
fixed //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gifMy god, so much misinformation in here it's ******* ridiculous. Helotaxi already stated it, the SQ of your system depends on the quality of your equipment NOT the pre-out voltage. If your amplifier is of any quality at all there will be no audible difference between a 2v, 4v, 6v, or even 8v preout, PERIOD. Stop buying cheap equipment then worrying about SQ, that's like buying a Ford Mustang and worrying about what your quarter mile time is.As a side note...helotaxi where the heck have you been? I haven't seen you around for a long time...
Its 500mVIntroduced in 1989 with an MSRP tag of $1,200. Named the best head unit of all-time, in a car audio magazine I read earlier this year. However, it had 4v pre-outs. lol
Specifications:General:
Output voltage (Preamp) ~ 500mV
Bass Adjustment ~ +/- 18 dB @ 30 Hz
Treble Adjustment ~ +/- 15 dB @ 15 kHz
Dimensions ~W 7" x H 2" x D 6-1/8"
Compact Disc Player:
Samplying Freq ~ 352.8 kHz (8x Oversampling)
# of D/A Converters ~ 2
# of Quantization Bits ~16-Bit Linear System
Freq. Response ~ 5 Hz - 20 kHz
Wow & Flutter ~ below measurable limits
THD ~ 0.002% @ 1 kHz
Dynamic Range ~ 100 dB
SNR ~ 110 dBA
Channel Separation ~ 95 dB @ 1 kHz
AM Tuner:
Sensitivity ~ 10 uV
FM Tuner:
Mono usable sensitivity ~ 16.3 dBf (1.8 uV/75 ohm)
50 dB Quiet Sensitivity ~ 20.7 dBf (3.0 uV / 75 ohm)
alternater channel selectivity ~ 80 dB
SNR ~ 60 dB
Stereo Separation ~ 35 dB
Capture Radio ~ 2.0 dB
AM suppression ~ 45 dB
A little off topic but here is a screenshot out of the 7909 manual:interesting. The article I read said 4V, I guess Alpine would be a better source.