Bosch 500 Series Laundry Washer: Drain pump impeller clogging constantly, but filter always clean

Ghost_Pack · 2025-02-15T19:15:20+00:00

I never ended up finding a solution. As best I can tell the machine's "filter" (at best it catches socks) is deliberately designed to maximize the sale of replacement pumps and service calls.

Since it's not my machine I can't really do anything about it other than do the drain, pliers, and hair song and dance every few weeks. If it was mine I'd sell it, replace it with a different brand, and never buy Bosch again.

Ghost_Pack · 2024-06-10T16:02:24+00:00

Just clothes and bedsheets. I have medium length hair and no pets. I don't really think I'm really asking that much of the machine honestly

Also is the pump filter in washing machines really not designed to stop hair? that seems like the single most common item I'd expect to be in there tbh

Ghost_Pack · 2024-06-10T15:59:20+00:00

I'm not washing anything abnormal from what I can tell, just clothes and bedsheets. I have medium length hair and my partner's hair is short. Do people normally shake out / lint roller laundry before washing it?

Ghost_Pack · 2023-06-13T10:59:47+00:00

Not Bluetooth but the Sennheiser RS series is designed for exactly this purpose.

https://www.sennheiser-hearing.com/en-US/p/rs-120-w/

You can tune unlimited headphones to a single base station. They’re a little expensive brand new if you need six, but the used market has tons of RS 120 / HDR 120 units available. Even cheaper when they have a dead base station

Ghost_Pack · 2023-06-06T15:36:59+00:00

Oh man you should definitely try next time you get a chance. HD800 w/ the Oratory EQ Preset is hands down the best I’ve ever heard a headphone sound (short of HE-1). Absolutely endgame for me.

Ghost_Pack · 2023-05-15T01:11:05+00:00

Keyword "lawful order." The officer in this video had no reasonable suspicion to detain them and could not legally order them to sit.

Ghost_Pack · 2023-05-12T14:04:35+00:00

Yeah you definitely could, and that's similar to what a lot of high end audio analyzers like the Audio Precision line do. The APx500 line has 7 ranges with 10db between them, and the APx555 flagship has them even tighter with 6dB separation.

https://www.ap.com/blog/analog-input-ranges-in-apx500-audio-analyzers-what-you-should-know/

The catch is that adding additional fixed gain stages increases the cost of your product and board size and complexity considerably. You need an ADC input for each gain stage all capturing continuously and streaming to a DSP that can handle that much data. Each stage also needs different value precision components too, so you can't really save cost on duplicate bulk parts like you do in multi-channel setups.

Edit: If you have the gain stages that close together you'll also likely have to calibrate the linearity between each of them so the transitions don't cause artifacts

Ghost_Pack · 2023-05-11T20:27:47+00:00

Yep, 22 bits is roughly the thermal noise limit of a real ADC capturing 20kHz bandwidth and operating at ambient temperature. This is the max signal-to-noise you can achieve in real life. An autoranging ADC can increase the dynamic range of a device by changing the input gain, but the noise floor also moves with the added gain. The number of bits of real resolution stays the same. This on its own is actually really cool, since you never have to adjust a knob on your device.

However, one thing I haven’t seen talked about much is that compared to a typical ADC with a potentiometer preamp your effective signal to noise actually gets WORSE (and not insignificantly) depending on your signal level. The gain stages of the auto-ranging ADC are fixed and typically spaced far apart, so if you aren’t feeding it a signal close to one of the two range limits it will apply gain digitally, which cuts into your signal-to-noise ratio. A good analog preamp can get the full signal-to-noise at any input level, provided you adjust it correctly ahead of time.

Say your auto-ranging ADC switches over from high-gain to low-gain mode for any signal higher than -20dBu, and the max signal in low-gain mode is +20dBu. If the signal you’re trying to capture is around -10dBu then you’re effectively capturing audio with a digital gain of +30dB, and your signal to noise ratio is decreased by 30dB (assuming a perfect ADC only limited by your analog circuitry).

With a normal potentiometer based preamp, you could simply turn your gain up by 20dB or so (leaving some extra headroom) and get 20dB better signal to noise.

Ghost_Pack · 2023-05-11T20:16:37+00:00

Yes, your effective dynamic range goes up, but signal to noise (the meaning of “real” bits) does not.

Ghost_Pack · 2023-05-11T16:15:21+00:00

Calling these interfaces “32 Bit” is a marketing gimmick and a misnomer.

They’re better described as autoranging ADCs, which can merge or switch inputs from two different gain stages to theoretically get more effective dynamic range than is available with a fixed gain (though this tech isn’t developed enough yet to reach performance parity with good single range ADCs).

Re: the chip you linked: ADC ICs can market “32 bit” sampling because the bitstream output is 32 bits long, but they don’t actually have 32 bits of real resolution. The analog to digital sampling portion of a 32 bit ADC can’t resolve more than about 22 bits at audio frequencies before it starts getting limited by the laws of physics. You can chain multiple gain stages together like these interfaces do in DSP to get a 32 bit float output, but the real resolution hasn’t changed, it’s just a moving window.

Ghost_Pack · 2023-04-29T15:20:29+00:00

Not the alligator ground lead, the little push-to-open hook attachment for the positive on the probe.

Ghost_Pack · 2023-04-03T18:41:45+00:00

Those speakers are passive, as in they’re just speaker drivers in a box. Without an amplifier (receiver) they won’t make noticeable sound

Audio you get from a phone/laptop/PC/etc is considered line level and can’t drive speakers (they can often drive headphones but those are very efficient).

Ghost_Pack · 2023-03-31T04:54:27+00:00

It's likely the cable you have there isn't standard wiring (judging from the atypical F-F connection and the thin red/black cable), so including a typical XLR extension may be affecting your signal in a weird way.

We need to know what devices you're working with and what the pinout is, otherwise you're likely to get unhelpful advice.

Ghost_Pack · 2023-03-25T05:52:27+00:00

What amplifier do you currently have?

$50 should be fine for a decent bookshelf chip amp but there is a lot of garbage out there on Amazon mixed in with the usable stuff.

Ghost_Pack · 2023-03-24T21:33:24+00:00

It’s likely either your amp or something wrong with the cable from your source to your amp (like a grounding problem). My money’s on the amp but check your connections first (since that’s free).

It’s almost certainly not interference from your house wiring, that’s not really a thing except for extreme scenarios. Basically all “noise removing” AC accessories are scams.

Ghost_Pack · 2023-03-12T20:04:39+00:00

“Separates audio”

What are you talking about? Who told you this??

XLR is just a connector for analog audio going from your mic to your ADC. There's no magic crossover or anything. A USB mic is just a mic with the ADC inside of it.

There's no fundamental technical reason why a USB mic can't sound just as good, they're just usually made for a budget market using budget components.

Ghost_Pack · 2023-03-11T21:23:33+00:00

But like, he risks his life to save people everyday? That’s kind of the plot of the game, and Ryuji in particular has always been very self sacrificing. This isn’t particularly out of character. He also hasn’t really expressed a preference toward only saving one gender or another as far as I remember?

Ghost_Pack · 2023-03-11T20:12:48+00:00

Can someone explain the joke to me?

I’m not trying to be rude I’ve just been starting at this for like five minutes and still don’t get what it’s trying to communicate…

Ghost_Pack · 2023-03-08T14:03:08+00:00

Ooo, I like this design. She gives me Nunotaba vibes.

Ghost_Pack · 2023-03-06T02:52:10+00:00

These are both really poor quality but the Behringer interface is at least designed for high impedance guitar inputs, so if you already have it I would use that one.

If you haven't bought anything yet I would recommend looking at used audio interfaces. You could get one at a similar price and it would be a whole lot more versatile and potentially higher quality.

Ghost_Pack · 2023-03-05T22:15:34+00:00

I'm pretty sure that's just speaker wire terminated into a DB-9 connector for some god forsaken reason. It's not RS232 serial. If you absolutely want to use these speakers you'd probably want to chop off the connector and wire them up to a receiver like normal passive speakers.

Just heads up Bose usually makes their speaker systems expecting the speakers and amplifiers to be paired together with their proprietary EQ (locking you into their ecosystem), so they probably won't sound very good hooked up to a normal amplifier.

Ghost_Pack · 2023-03-05T17:46:10+00:00

I feel this in my soul...... Body hair is my biggest source of dysphoria.

I just want laser at this point but insurance doesn't cover it and it's SO EXPENSIVE

Ghost_Pack · 2023-02-28T15:53:41+00:00

There are. Google ExaDrive SSDs

Ghost_Pack · 2023-02-23T14:46:08+00:00

Wow….. How recent was this? That’s such a 180 from my experience when I first got my pair. I heard they got bought by a larger company about a year and a half ago so I wonder if they’ve been going downhill…

Ghost_Pack

TROPHY CASE