MyE28.com DEV

e24mpwr wrote: Feb 19, 2023 4:02 PM A couple of my E24 buddies have done this recently - I'll see if they can come describe how it worked out for therm.

My friend Andy mentioned the same thing @reesesboot did - that an external amp is required.

bogdaneise wrote: Mar 23, 2023 12:54 PMHello,
Anyone know where to get a firmware update for this unit ? I have the P1827201X version. Thank you!

Here's an updated link http://bit.ly/3ncbkxe (Feel free to pm me if this no longer works)

Two comments (provided by the generous person who previously offered to share this with me):
a) Make sure you read and follow the README file
b) The upgrade only worked for me when I plugged the USB drive into the
front of the radio, (I first tried with the rear input which failed)

Found this changelog that came with the software when I upgraded my radio.

Changelog BREMEN SQR 46 DAB (2001018000000)

P9A22031
- First release

P9B15034
- added DEMO MODE with color change
- added more colors 512 > 4096
- BEEP default changed to OFF

P9C10038
- Production release

P0115039(X)
- DAB: Presets stored permanently even after new SERVICE SCAN
- DAB: Improved timing of keys for selection of DAB SERVICE
- Bluetooth: Reconnect to source BT-STREAM after ACC OFF/ ON if available
- Issue: Sometimes wrong DAB channel display (X- Version only)

P0313043(X)
- added: BEEP confirmation for PRESETS even if BEEP is OFF
- added: PRESET+ / PRESET- for SWC commands
- changed: SWC compatibility (58mV)
- fixed: channel display with new DAB module (X- Version only, not verified)
- added: compatibility with SWC commands of some pioneer compatible interfaces, e.g. connects2 (default setting, no SWC setup needed)
- issue: SWC1 / SWC2 reversed for preprogrammed keys
- issue: DAB presets not saved anymore after new SERVICE SCAN/ INTRO SCAN

P0317044(X)
- fixed: SWC1 / SWC2 reversed for preprogrammed keys
- issue: DAB presets not saved anymore after new SERVICE SCAN/ INTRO SCAN
- issue: SWC PRESET+/ PRESET- does not properly on DAB (changes ENSEMBLE instead of PRESET)

P0318046(X)
- fixed: DAB presets not saved anymore after new SERVICE SCAN/ INTRO SCAN
- issue: sometimes wrong channel info displayed on DAB if displaymode is set to FREQUENCY

P0323047(X)
- added: show A2DP streaming info TITLE/ARTIST/ALBUM (select via DIS), capability may depend on used phone/ mp3 player and production date (only models with bluetooth version B20191226 and higher are supported, please check in MENU - VARIOUS - VERSION).
- fixed: SWC PRESET+/ PRESET- does not properly on DAB (changes ENSEMBLE instead of PRESET)
- fixed: sometimes wrong channel info displayed on DAB if displaymode is set to FREQUENCY

P0701049(X)

- fixed: BT pairing issue on selecting STREAMING (shows accidentally PIN before starting pairing)

P1310050(X)

- changed: BT AUDIO MIX volume optimazion for higher volume levels (BT AUDIO MIX volume increases in proportion to the MAIN volume ). Please note: Completely proportional volume change is not possible, this is hardware related.

P1310052(X)

- fixed: Permanent memory issue of some settings (FAD/ BAL)
[/quote'

Freight wrote: Jan 02, 2025 1:30 PM Regarding the quality complaints -

has anyone bothered taking an original period correct unit and adding Bluetooth to it? It requires a steady hand with a soldering iron but seems possible by tying it into the cassette deck. This is how the people retrofitting the OG units do it, and then charge $700 or whatever for them.

my only hesitation has been the sound quality being potentially poor? I listen to mostly punk/crust/sludge, so *contrary* to what untrained ears might think, there’s a lot going on and poor sound quality will blend it all into mush.(or I’m delusional )

would be keen to hear anyone’s feedback on this.


 

4DSC wrote: Jan 03, 2025 11:44 AM

Freight wrote: Jan 02, 2025 1:30 PM Regarding the quality complaints -

has anyone bothered taking an original period correct unit and adding Bluetooth to it? It requires a steady hand with a soldering iron but seems possible by tying it into the cassette deck. This is how the people retrofitting the OG units do it, and then charge $700 or whatever for them.

my only hesitation has been the sound quality being potentially poor? I listen to mostly punk/crust/sludge, so *contrary* to what untrained ears might think, there’s a lot going on and poor sound quality will blend it all into mush.(or I’m delusional )

would be keen to hear anyone’s feedback on this.



 

I've attempted this with a few units with varying degrees of success. The tape mechanisms work differently on each radio so it's not always obvious how to "hotwire" it for aux. With the older Blaupunkts and Alpines I mainly ran into other components failing or starting to fail which were beyond my ability to fix properly like bad volume knobs, reduced sound quality, failing backlights, broken radio receptors, generally cold solder joints somewhere that were hard to find and led to functionality issues (and there are a lot of solder joints on these). I had more luck with the e36+ units that DavidE9 references. Had a working setup with a C33 wired into the cassette, and a C43 with a manually made harness connected to a BT dongle, but for the labor involved that 50 euro kit looks like a great value. Anything with an aux/cd changer input already is usually easier to tackle. And yes I am crazy and ruined multiple radios because I have to have period correct (looking) units in my vehicles.

e28Sean wrote: Jan 02, 2025 9:22 AM Just going to toss my 2¢ in here;  I've been living with a Continental HU for a few years now, and am still very satisfied with it.  It also looks great, and blends in really well.

Freight wrote: Jan 03, 2025 1:09 PM A modern Bremen recently sold on Facebook locally that the seller must have mistook as an original, as it sold for $150. Maybe I’ll get lucky.