Forum Replies Created
-
AuthorPosts
-
BRONZE Member
Sound quality will be more a function of the cartridge and speakers you are using versus the preamp. To get an internal one you’ll need to spend around $400 where a decent external one can be had for $100+.
BRONZE MemberI can’t comfortably comment on how sonically different they were even though I worked for a dealer while both were in production. Obviously, the 4400 was their top of the line at its time a was replaced by the 5000 series during the 7700’s time. Both had similar discrete Class AB amps. If you want to read about the design I can suggest no better resource than it Owners Manual: https://beomanuals.com/manuals/Beomaster/Beomaster%204400/Bang-Olufsen-Beomaster_4400-Owners-Manual.pdf. While you obviously don’t push your Maggies that hard, sometimes you don’t know what you are missing till you hear them with a more authoritative amp. In my case I was using Sony’s venerable TAN-5550 VFET amp which was a great match as it was conservatively rated and I beefed up its power supply.
BRONZE MemberIf by first generation, you mean MG-1’s then they are 4-ohm speakers and you will find significantly better dynamics from the 4400 as it has a more powerful and capable amp section – 75w vs 30w in 7700. I never had the MG-1 but dit have the MG-2 and they definitely needed the power for good bass response.
BRONZE MemberIf you have the original phono DIN cable marked with a PH then B&O used to have DIN->RCA adaptor that had an external ground wire which is needed. If you can find that then a special internally grounded one such as https://soundsheavenly.com/beogram-record-players/14-2244-beogram-to-non-bo-device-as-used-on-beogram-4000c-phono-pre-amp-receiver-amplifier-etc-bo-ref-6271348.html#/2-length-1m/60-grounding-internal_ground_link will work.
BRONZE MemberYou mention a preamp but don’t mention which one and whether you are using the proper Phone DIN cable to it. This cable has double screening and is a requirement to prevent hum and buzz.
BRONZE MemberI suspected as much. I did not choose that route as I wanted the higher head room and direct coupling to avoid caps in the direct signal path,
BRONZE MemberFYI, you are not limited to an internal phono preamp if you have trouble finding one. You can use and inexpensive Project Box or Schiit Mani and actually get better sound.
BRONZE MemberGreat progress! I would measure the woofers as the doped cones will likely change the parameters causing a crossover modification.
BRONZE MemberVery clean. How are you deriving the bipolar phono section supplies? I offered a similar mod back in the 1980s (w/o the remote) using a DC-DC converter plug-in module.
BRONZE MemberThe click you are hearing is the muting relay. Make sure you use the schematic for your specific Type number as the circuit did change over the production period.
BRONZE MemberThe damper only causes the arm to lower slowly. It’s the solenoid activation that releases it to lower. If it is not staying down, what is the DC voltage you across the solenoid when the arm is supposed to be down?
BRONZE MemberWhen you stat that the arm does not stay down, is that because the actuator does not retract? If that’s the case I would check the actuator circuit. Since you state you had it serviced for a bad solenoid, did they replace anything besides it? Do you have a voltmeter to be able to test the circuit?
BRONZE MemberThat is the correct cable. Without the pins in one connector, you will not be able to control the turntable from the remote control. It will play fine and should not exhibit hum,
BRONZE MemberYou should replace the relay. Beolover has a replacement at https://beolover.com/products/siemens-relay-replacement-for-beogram-4000-4002-and-4004. You can find new impregnated motor bearings at https://www.beoparts-shop.com/product/motor-bearings-set-for-beogram-4002-4004-6000-dc-motor-versions/.
BRONZE MemberThe correct cable did have a Phono label at one time to distinguish it from a Beocord cassette cable. Datalink cables have 7-pins instead of 5 and pins 6 and 7 are removable as they have a small screwdriver slot at their tips.
BRONZE MemberI’m not sure I’d buy that he sold it for $3K as it was never sold in mint condition. You can clearly see in the video the wear spots on the control panel and pitting throughout. Also his “repairs” are dubious. Who wraps tonearms in foil tape? If he knew what he was doing he could balance and center the platter plus clean the top plate. The cantilever is also askew. In that condition and at that starting price he’ll be lucky to sell it in 6 months. Pass!
BRONZE MemberImage shows the stylus is long gone. Time for re-tip or replacement.
BRONZE MemberWhile it is not the best angle to examine, it does look like the tracking force is too heavy or the stylus’s suspension is shot and needs replacement. If it’s an SP-10 or 12 it should be 1.2 grams.
BRONZE MemberYou can use the Line input into the Beolabs as I described above as they will turn on when they sense an audio signal.
BRONZE MemberWhich active speakers are you considering? If not B&O you can pad the speaker output or use the headphone output directly.
-
AuthorPosts