HiFi Emozioni all'Ascolto - Audio Forum

Thanks! It should be noted that grundig had cleanest waterfall and harmonic distortion content i've seen. Better than modern esoteric cordonum and ceramic tweeters. MB had 2nd harmonic distortion peak at 7khz and medium level resonances above 10khz. Also grundig tweeter was not flush mounted. That e...

I finally got some time to do proper measurements of this tweeter.
I will post it here if anyone will find it useful.(together with grundig tweeter from 450a).
Measurements were taken from 70cm distance on baffle 1x0.5m in open space.

This is in room response with pluvia 7.2hd. There is cone break up around 12khz. I corrected it later with notch filter, but disconnected it because it sounded dull of axis. Nothing can prepare you for OB bass from 15".. once you hear it its hard to go back. Presentation is just so much different fr...

I already did. Using 15" woofer and 3-4" fullrange. I tried vifa tc9 and markaudio pluvia. Speaker plays flat from 25hz. Its a simple design using 18mh iron core inductor for bass, and 6.2uf for tweeter (plus attenuation, notch filters etc). Vifa offered natural timbre, but had bloated image without...

Hi! I have question about first generation of soft dome grundig tweeters from 1969-1972. I belive they were used on box 306A, box 525 etc. By observing the materials used they look similar to those used on Audioprisma series. Does anyone know if they are close in terms of performance to later series...

Thanks.
I reconstructed one. But as you said, effect is rather small.
I could not hear any significant difference

Hi Massimo!
Thank you for advice. I used wd40 contact cleaner.
I pushed the plastic nosle inside the switch and soaked them all with cleaner. It did get better.. Bass is better now, but mid/high still sounds little coloured and congested. I will repeat the procedure few times..

What is the best way to clean the plastic switches on large receivers? One speciment I have sounds like "Rauchfilter" is almost never fully disconected. Bloated bass and high frequency attenuation.
All advices are welcome, thank you.

I received JVC AX1 from well known Croatian hi-fi amp builder with more than 50 years of experience in audio design. I was always boring him with stories about CCI and Grundig, so he decided to send me what he considers is finest Japanese mass produced amplifier in order to compare it against my bel...

I noticed none of my 4 Receivers has it. Presumably owners were replacing bulbs or something and tried to open it there.. Screws are there, but no capacitors or insulating washers. It has probably already been answered but I cant find it.. Does it have effect on sound and CCI, or are they there just...

C905 and 906 are probably fine. "Leakage" you see is glue used to reduce vibration of capacitor. You should measure resistor values and output transistors on affected chanel and go from there. If you really need to replace capacitors use same type and same value. There are lot of good ones. Mundorf,...

TS1000 is finally repaired! As amateur hobbyist I must tell you - it was hard journey! Problem after problem! Works 10min - engine stops - troubleshoot and repeat! Lot of dying and dead ELKOs (Frako <3) and tantalums. My advice is to replace all of them on M and R module - its the heart of ts1000. (...

https://ts1000.de/ They have lot of parts and advices. Lubrication explained in details. I found short: 2 tantalums (+IC and filter). I temporarily put 2 electrolytics in there just to start it again. Since modern tantalum capacitors have rather poor performance, would something like polymer electro...

Has anyone greased plastic gears and lubricated sliders on TS1000? Mine has completely go dry. From what it looks it seems like they used lithium grease on plastic gears :geek: Would PTFE grease work as well? What lubrication should be used on front sliders? I'm in process of reviving my TS1000. (fe...

It seems little too good to be true :D However, there is huge DUAL speaker fan base on german forums. I've heard few dual cl (390, 161) with mediocre amplifiers and they actually did preform well! They did left impression of somewhat budget build quality.. Thin cabinet with little dampening foam, si...

Found some info.. 19mm dome, excellent linearity over 1500hz up to 20khz. It might just work out fine.

Does anyone have more info about these tweeters? Primarily what is their sensitivity and usual crossover point. I know they had been used in some notable speakers like Telefunken TL800 and Dahlquist DQ10. Since I have 4 pairs of HTL1913 lying around I was thinking to use them as replacement for few ...

Haha x) part with listening certain music to inspire the sound of amplifier was indicative that he was a bit delusional. But one can't deny the unique sound of his amps. Guitar amps and hifi are completely different.
I hoped that there was something more to his design.

Non li ha provati più nessuno questi cavi?? Io li ho pure passati a Massimo, ma prima che trova il tempo di provarli..... Sorry, I suggested Sommer but didn't order them yet. I bought box 516a and box 300 so I postponed topping l30/sommer cable purchase.. I will order it from Banzai in few weeks wi...

https://www.youtube.com/watch?v=YG4mtDyckAc *3:20 Here is interesting video about legendary guitar amplifiers "Trainwreck" and their designer. Seems that Ken Fischer had different philosophy then everybody else and his theories were widely regarded as controversial. Was Ken Fischer discovering a CCI...

I just made 2x 5pin to RCA cables for my Receivers as experiment for DAC/CD: #1 cheapest Nedis Composite Video Cable (non shielded) to plastic 5 pin din connector. (1.5 eur project) #2 Tasker microphone cable 2x0.25 (shielded, cloth insulation and PVC outer sheet) with plastic RCA and Din connectors...

Yes.. Couldn't find bc637, ordered bc638 and bc639 - closest equivalent. Since the legs of bd204 and 203 were shortly cut it would be unsafe to return them after testing. They will be replaced with same nos philips transistors. I hope it wont change the sound for worse.

It was BC637..

Last post from me.. Actually it was a R20, not R25 as I wrongly written before. But never mind. Restauration is now complete. I used chinese T5 and T10 LED's from aliexpress.. you can get 40 pieces for 3eur.. unlike expensive ebay kits for receivers with weak halogen yellowish bulbs. LED has brighte...

After initial 20h of burn in time sound has begun to settle down. Everything feels more mellow and clear, soundstage is becoming relaxed and is being pushed further behind the speakers making the illusion that room boundaries no longer exist. Bass is not overwhelming anymore. Initialy warm, tube lik...

I finnaly got the time to do the refresh. For the all small value capacitors I used elna silmic II, axial frakos were replaced with F&T A series, filter capacitors with Nichicon KS and 1000uf 40v and 100uf 100v were replaced with Frolyt ERY. I worked with circuit on plastic chassis, only removed the...

took them out, tested them. they also work.

These are my measurements - green checks with manual within few percent, red is off.. all soldier joints look fine. Amplifier plays fine, with only traces of sizzle on the right channel.
Before I drop >60€ on repair would anyone have some suggestions?

Thank you anyway.. Im only hobbist too.
Cold solder joints, capacitor replacement and biasing is my limit. I will need a professional to take a look..

Trimmer is fine i think. Problem is that with multimeter i get 0-1.5mV when i measure A and B points when amp is on, and when i turn it off i get >300mV.

*R117 - R118 are both 0.59V and R119 - R121 are 0..
Amp still plays, but I don't think its safe to use it before I find out what's the problem.

Could these corroded parts (09647 022.97 - ferrite beads?) cause a problem?
P.S I'm sorry I started a thread in wrong part of forum.

left one is now 20mV - it was 12mV before.. for some strange reason I cant get a measurement out of R119 and R121 on right channel. Always measures 0, when i turn off amp it jumps to 500mV and back to 0. Can't understand what am i doing wrong..

Thank you

Can i ask for some help.. I would like to bias my v7000 but can't figure it out from the scheme.

Filippo ha scritto: ↑
dom 22 nov 2020, 19:07
Che naturalezza e libertà!
Scusate scrivo mentre ascolto quando percepisco una caratteristica.....
Grandi cavi, li consiglio caldamente.

Im really glad you like them.
Fortune favours the bold

Thanks for the review. I was planning to order them anyway, but now i cant wait to test them.

So now after a few days and some "burn in" time.. Whats the final conclusion? Are they valid alternative? Better imaging and more detail sounds really tempting (thats the part i thought grundig cable was unbeatable!), especialy for 2.5eur/m cable. Is the loss of low end dramatic or just seems little...

Quotissimo!!! Allo stesso tempo è più che lecito cercare delle valide alternative visto che i cavi Grundig non è che si trovino così facilmente. I agree. Grundig cables are perfect for grundigs, but incredibly rare.. Only way to obtain them is to cut them from some speaker. Since i have more than 6...

Waiting for the review then

Regarding dsd format.. Its important to keep in mind that all the mixing and mastering is done in pcm and after that upsampled to dsd. So basicaly extra steps for no gains and it eats up hard disk space.. 30gb for one album and no obvious gain in sound quality.

Thanks, hope you will find them enjoyable.
There will be more in the future when I repair TS1000.

You should try Topping E30. It quite cheap for its performance - 130eur. It's in the top 10 dac's in the world in all price ranges - according to the measurments done on Audio Science Review forum. Great signal to noise ratio, ultra low intermodulation distortion, dead flat frequency response, multi...

Hello fellow Grundigophiles. I found recording of a Christmas concert I recorded with TS1000 and GCMS microphones and thought I lost it. Managed to recover it from old hard disk. Concert was recorded in UNESCO heritage site - St. James Cathedral - Croatia, Šibenik. I was called in last minute by one...

Even some Chinese cables have that diameter, But they're not intertwined like that. They could be good. But I've never tried them. Grundig cables do not reach 2.5 mm in diameter, if I am not mistaken. I'd try 1.5 mm. Lowest chinese is 0.08mm tinned copper strands in silicone jacket.. As you mention...

Im probably ordering Topping L30 headphone amp in few weeks from audiophonic.fr so i will probably order few meters. Will report the experience.

https://shop.sommercable.com/en/Cable/HiFi-Home/Lautsprecherkabel-SC-Orbit-225-MKII-HighEnd-425-0151.html I was wondering has anyone tried this cable? It looks really promissing and similar to old grundig cables. Manufactuer says that it has flexible rubber like PVC jacket, and copper strand diamete...

I experienced some distorting overtones on my sl1000 tweeter on higher octave piano around 1-3khz. I exchanged it with my spare 450 tweeters but problem still continued. However i noticed slight improvement in high end clarity, might be placebo since tweeters are still like new and shiny :P There is...

Might be that sl1000 are just that good and create 3d imaging from any source :P Too bad. I hoped it would be a good discovery. But still, amplifier sounds suprisingly good. Neutral, detailed with good imaging. Guests in restaurant will now have good sound with v8400 and vintage ITT speakers. Thank ...

Here it is. All sides.

Hi everybody! I wanted to share a new find. I bought V8400MKII cheaply for use in my restaurant, since it had enough power and 4 outs with 2 extra surround outs.. I thought that I can't go wrong with Grundig since they are reliable and - well, I'm yet to hear one that doesn't sound excellent. Howeve...

Massimo thank you for reply. I'll try to use contact spray on pots. I'll follow you advice to keep frako inside for now and replace other elkos because receiver takes more than 30s until it starts to get some sound. I dont mind taking the risk with this one (i have >10 amps and recievers in good wor...

Hello. Im new to the forum but long time grundig fan from Croatia and i have collected almost everything Massimo reccomended on the main site. I have few Recievers; R20 and R35 that work flawlessly and R25 that needs few minutes of warm up and has slight channel imbalance. I decided to make complete...

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