18x18,5x5cm measured inside the car (GTS booster), connectors not counted in. Those need 1 a 1,5 cm extra room.
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Randomly bumping an old thread, as I've
been watching/looking for an answer to this question for over a year now.
Finally, a useful-ish amplifier has been released which fits comfortably in the
stock location. Its in the 2012 amp range for Soundstream.
Picasso Nano PN4.320D
http://soundstream.com/store/car-audio/amplifiers/picasso-nano/pn4-320d.html
The original booster is like:
2.125" (5,40cm) Height x 7.25" (15,90cm) Length x 6.5" (16,51cm) Width
Size of the PN4.320D is:
1.5" (3,81cm) Height x 7" (17,78cm) Length x 4.75" (12,06cm) Width - which makes
is a fair bit smaller than the stock factory amp:
Quote:
Originally Posted by Rob Edwards View Post
Factory amp dimensions:
Height 2-1/8"
Length 7.25"
Width 6.5"
This new amp is 4-channel (Class D), and will drive 2ohm speakers like the
original 6" woofers in the 10-speaker setup.
Once my '89's interior is ready to put back together, I'm getting one of these.
They apparently run cool too which is important for that small space by the
passenger seat.
It can be bridged, so it offers flexibility for driving rear woofers/mids, or
woofers/sub (and run the mids off the headunit's rear speaker output). I plan on
driving the door speakers off the head unit regardless. (note - if you want to
run the woofers off this amp, its worth making a simple low-pass filter.. the
stock Blaupunkt amp contained one at around 1500khz).
I'm not going for audiophile quality - I just want to get all 10 of the stock
speakers working properly and sounding reasonable; the PO of my '89 ditched the
stock amp and badly wired up the speakers. Sure I could have done this before
now with a big ugly amp - but I don't want amplifiers mounted anywhere in sight,
or anywhere that costs me storage space, and want to keep the spare wheel in the
car too.
__________________
Hilton
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Booster internals (pics courtesy Francesco) It also shows replaced capacitors as they age and loose they capacity, which causes loss of amplification quality
========
====
Booster alternative from Focal:
FOCAL FD4.350
High-End
4-Kanal Class-D Mini-Digital-Verstärker
Nur 19,9 x 10,8 x 4,3 cm klein!
Dank der volldigitalen Technik hat dieser Verstärker trotz minimaler Abmessungen
richtig Leistung, klingt high-endig und sehr dynamisch!
Focal´s neueste Verstärkerserie für alle die Ihren Verstärker versteckt einbauen
möchten aber trotzdem einen sehr gut klingenden Verstärker möchten.
Inclusive High-Low-Adaptern zum Anschluß an Werksradios oder Autoradios die
keinen Cinchausgang haben.
Natürlich sind auch Cinchanschlüsse vorhanden zum Anschluß an Autoradios mit
Cinchausgang.
Technische Daten:
- 4-Kanal-Verstärker
- 4x58 Watt RMS an 4Ohm
- 4x100 Watt RMS an 2 Ohm
- 2x 200 Watt RMS gebrückt an 4 Ohm
- 2 Ohm stabil
- stufenlos einstellbarer Low-Pass-Filter von 40 bis 400Hz mit 12dB
Flankensteilheit pro Kanalpaar
- stufenlos einstellbarer High-Pass-Filter von 40 bis 400Hz mit 12dB
Flankensteilheit pro Kanalpaar
- Übertragungsbereich 10Hz bis 50kHz
- Rauschabstand größer 84dB
- Klirrfaktor kleiner 0,05%
- Eingangsempfindlichkeit des Cincheingangs stufenlos von 0,2Volt bis 5Volt
regelbar
- Cincheingänge und High-Level-Eingänge
- Schutzschaltungen gegen Kurzschluß, zu niedriger Wiederstand, Gleichspannung,
Überhitzung, Verpolung
- Absicherung: 1x30Ampere
- Abmessungen (LxBxH): 19,9 x 10,8 x 4,3cm
- Gewicht: 850 Gramm
=======
I installed an Alpine KTP-445u (or
KTP-44SU) in the stock location. It fits nicely and sounds great for the front
(Polk) and rear seat speakers (MB Quart) (the far hatch speakers are
disconnected). A separate California 400w amp powers a Polk C-4 Isobaric Sub
that fits nicely in the hatch area behind the seats.
If you are still running with the original speakers, the cones are probably
disintegrating by now and I doubt they will sound good.
'88 S-4 Auto Silver Metallic/Black
MFranke
====
Hilton, can you tell me what you bought in the self powered sub?
I would like Hans' setup with the sub but I don't think you can risk not having
a spare in Australia if you want to do some long road trips. Have an amp and a
tube sub now but it takes up too much room.
Thanks
Its the stock one from in the spare wheel of a Nissan Rogue in the USA - has a
built-in Bose amplifier and can be wired up to take the on/off signal and
subwoofer line-out from the head unit. I paid about $US70 for it including the
pigtail (to make wiring easier), plus shipping.
I'll be installing it in my '87 - with the silver forged spare rim. It sits up a
little high, so I'll probably make a 3mm MDF replacement for the spare-tire
cover with a hole to accommodate the top of the sub enclosure. It'll be
invisible under the carpet as the top of it sits flush with the foam padding on
the right-side of the hatch under the carpet.
Being designed to fit in a spare, it has a hole through the middle, so I'll be
tapping and bolting it to the plate that holds the spare in place, so it won't
fly in an accident.
My '87 has just the basic 4-speaker setup behind perforated panels - the
speakers in it are tiny so I need something to add bass, and this woofer seems
like an ok solution.
__________________
Hilton
======
Although it's still a chip amp (IC's
instead of discrete output devices - and much higher distortion to go along with
that design choice), they used some pretty good parts in it: Wima film caps and
Matsushita electrolytics; pretty good boards and inductive filtering too.
The one thing I found surprising (or maybe not so much) is that there are
different devices used for the rear two channels. The door and cargo channels
use one LM2005 each (bridged, as used in this amp, will drive 20W into 4Ohms).
The woofer drivers, though, are TA7250's. They aren't much more powerful into
4Ohms (23W), but, unlike the LM2005's, these are rated to drive 2Ohm loads
(30W). So, a bit of indirect evidence about 2Ohm woofers in the B-pillars.