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04-25-2012, 08:03 PM | #67 | ||
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Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
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04-25-2012, 08:08 PM | #68 | |
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Mobridge DA2 > JBL MS-8 > ARC XDi 600/4 > JBL Gti 408 Mids & Vifa OT19 Tweeters; PG Ti2 1600.5 > Morel HCW-10 & IDMax 15
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04-26-2012, 05:55 PM | #69 |
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Kaigoss & Technic & VP if you are around:
Please check out this post - deciding on XD (fully active front) vs HD (2-way front) http://www.diymobileaudio.com/forum/...ml#post1616130 |
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04-26-2012, 06:00 PM | #70 |
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04-26-2012, 06:03 PM | #71 |
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If your system is coded to HiFi, you can go straight into an amp. If its coded for Individual Audio/EPS or Logic7/HarmanKardon, you will need MS-8 or LOC device.
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04-26-2012, 08:05 PM | #72 | |
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Maximum input level on the hi level inputs on the ms-8 is 15volts Maximum voltage on the underseat subs in the eps is 30 volts Which means you can't get any bass signal into the ms-8 I guess you could use the ms-8 for mids only But you'd be at the mercy of whatever the factory high pass frequency is on the mids You could use a ms-8 AND lc2i So all the speaker outs go to ms-8 Underseat subs go to lc2i THEN ms-8
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04-26-2012, 08:47 PM | #74 | |
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The hifi has 5v out With eps/l7 the head unit out is optical straight into amp So the only way to tap the signal is after the amp Hence why the voltages are so much higher, because you are using speaker outs I wish we could go from Eps to ms-8 I wouldn't have sold my ms-8 then
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04-26-2012, 08:51 PM | #75 |
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I understand completely. But as peak voltage in hifi is 5v --> low level 2.8v input; similarly 30v peak eps voltage into 15v input is about the same. Bottom line is that as long as you dont turn the volume knob up the last few clicks, you wouldnt get clipping. I cant be sure it works the same on low level vs hi level but i cant think of a reason why it wouldnt.
One way to find out. Ask andy over on diyma |
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04-27-2012, 04:33 AM | #76 | |
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The main problem of the EPS system is not that much the 30V peaks on the woofer side. It is the discrepancy between those 30V and the 15V or so of the rest of the speakers. So depending on the summing device used it may induce slight pops thru the tweeters at bass hits. The Cleansweep summing device and the bit one.1 showed those problems when connected directly to the EPS OEM amp outputs in my initial two installs. That's the reason I ended up adding an LC6i to the bit one.1 so I can adjust the woofer outputs gain relative to the front speakers before the summing, and then input the summed signal into the bit one.1. Now I just go directly to decoding and avoid all this patch work. |
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04-27-2012, 10:23 AM | #77 | |
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In the Stereo cars, the speaker interface isn't the issue, it's the correction. But it's incorrect to say "all that's needed is the right harness". 97% of all aftermarket amplifiers sold are NOT compatible with the signal out of ANY BMW audio system with ANY harness. Even HiFi system signals are only usable by amps with balanced inputs. A few amps can take the woofer signal directly in without distortion in a Logic 7/HK add-a-sub arrangement. But most amps on the market are common-ground RCA input, and if they have a "speaker-level" input, it's a balanced input with a lot of attenuation in front of it (which usually ruins your noise floor with a lower-voltage preamp signal which needs no attenuation). Common-ground RCA input means the outer ring of the RCA is grounded, and this shorts the (-) clamped DC leg of the HiFi audio output. |
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04-27-2012, 10:55 AM | #78 | |
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04-29-2012, 09:34 PM | #79 |
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technic-this website won't let me PM you. would love to talk to you about my sound system upgrade from the HiFi on my 2012 328xi coupe. give me a call if you can. 832-265-0376. thanks
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04-30-2012, 06:14 AM | #80 |
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You do not have enough postings to PM yet. Keep posting and then PM, please. No phone calls.
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05-01-2012, 01:19 PM | #81 | |
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If I have hifi, using Technic's harness, will I be ok hooking up a XD600/6 to power everything including new woofers under the seats? You mentioned most amps don't do this well...thanks for all the info so far. |
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05-01-2012, 04:36 PM | #82 |
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XD600/6 has balanced differential input so you should be covered.
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05-20-2012, 01:48 PM | #83 | |
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http://www.amazon.com/Raptor-TWB-3RA.../dp/B00322QF4I I measured DCV @ 55/55 on OEM HU and I got 27mV on left and 2.7mV on right. I was not able to measure ACV as the meter I have only has a 200 and a 750v range for ACV Possible I have a bad connection before I go dropping these amps in? Also, the 2.8v INPUT of the MS-8, is that ACV or DCV? |
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05-20-2012, 03:32 PM | #84 | |
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I got a better 1khz test tone and got 4.3vAC at the end of the RCA s (L/R) @55/55, at 53/55 I was able to get 2.8-2/9vAC I still am curious as to why I was able to get a vDC reading that was 27mV on the left and 2.7mV on the right...wierd. Another weird thing. NONE of the speakers in my car are connected to anything (amps and ms-8 currently out). Yet...when playing the 1kHZ test tone I could clearly hear it from somewhere in my car (it was intermittent). It was just a bit louder than say a hearing booth test but definitely there. Is it possible that playing a 0dB tone, the voltage is high enough to induce a signal into the speaker lines behind the HU (technic harness)? |
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05-21-2012, 12:40 AM | #85 |
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Technic, after numerous searches I have decided to purchase an MS-8 for my EPS (coded to HiFi) and will be needing a harness from you! Do you mind posting the price shipped within CONUS? Also, do you sell wiring kits? For now I just plan on running an MS-8 however that may change in the future. One last question, can I replace the subwoofers at a later date or will I chance blowing them with the MS-8? Looking at the specifications I highly doubt it but wanted to double check first, thank you.
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05-21-2012, 08:57 AM | #86 | |
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You will need a separate amp for the OEM EPS woofers. Please PM for details on the harness. |
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09-14-2012, 09:23 AM | #88 |
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You have any pics of your amp rack?
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